There is no description at this point.
https://securityintelligence.com/merchant-of-fraud-returns-shylock-polymorphic-financial-malware-infections-on-the-rise/ |
https://securityintelligence.com/shylocks-new-trick-evading-malware-researchers/ |
https://www.europol.europa.eu/newsroom/news/global-action-targeting-shylock-malware |
https://www.virusbulletin.com/virusbulletin/2015/02/paper-pluginer-caphaw |
http://contagiodump.blogspot.com/2011/09/sept-21-greedy-shylock-financial.html |
https://malwarereversing.wordpress.com/2011/09/27/debugging-injected-code-with-ida-pro/ |
rule win_shylock_auto {
meta:
author = "Felix Bilstein - yara-signator at cocacoding dot com"
date = "2018-11-23"
version = "1"
description = "autogenerated rule brought to you by yara-signator"
tool = "yara-signator 0.1a"
malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.shylock"
malpedia_version = "20180607"
malpedia_license = "CC BY-NC-SA 4.0"
malpedia_sharing = "TLP:WHITE"
/* DISCLAIMER
* The strings used in this rule have been automatically selected from the
* disassembly of memory dumps and unpacked files, using yara-signator.
* The code and documentation / approach will be published in the near future here:
* https://github.com/fxb-cocacoding/yara-signator
* As Malpedia is used as data source, please note that for a given
* number of families, only single samples are documented.
* This likely impacts the degree of generalization these rules will offer.
* Take the described generation method also into consideration when you
* apply the rules in your use cases and assign them confidence levels.
*/
strings:
$sequence_0 = { 33c0 c3 40 3b411c }
// n = 4, score = 2000
// 33c0 | xor eax, eax
// c3 | ret
// 40 | inc eax
// 3b411c | cmp eax, dword ptr [ecx + 0x1c]
$sequence_1 = { 3bdf 0f84b2000000 397d08 0f84a9000000 }
// n = 4, score = 2000
// 3bdf | cmp ebx, edi
// 0f84b2000000 | je 0x244d86e
// 397d08 | cmp dword ptr [ebp + 8], edi
// 0f84a9000000 | je 0x244d86e
$sequence_2 = { 33f6 eb06 8b4d20 8d3488 }
// n = 4, score = 2000
// 33f6 | xor esi, esi
// eb06 | jmp 0x243ebae
// 8b4d20 | mov ecx, dword ptr [ebp + 0x20]
// 8d3488 | lea esi, dword ptr [eax + ecx*4]
$sequence_3 = { 33f6 56 ff750c 6a01 }
// n = 4, score = 2000
// 33f6 | xor esi, esi
// 56 | push esi
// ff750c | push dword ptr [ebp + 0xc]
// 6a01 | push 1
$sequence_4 = { 33f6 eb06 8b4dec 8d3488 }
// n = 4, score = 2000
// 33f6 | xor esi, esi
// eb06 | jmp 0x244a53d
// 8b4dec | mov ecx, dword ptr [ebp - 0x14]
// 8d3488 | lea esi, dword ptr [eax + ecx*4]
$sequence_5 = { 0f84c9000000 8d44240c 50 6a48 }
// n = 4, score = 2000
// 0f84c9000000 | je 0x2445236
// 8d44240c | lea eax, dword ptr [esp + 0xc]
// 50 | push eax
// 6a48 | push 0x48
$sequence_6 = { 33db 8db560feffff 8bf8 895dfc }
// n = 4, score = 2000
// 33db | xor ebx, ebx
// 8db560feffff | lea esi, dword ptr [ebp - 0x1a0]
// 8bf8 | mov edi, eax
// 895dfc | mov dword ptr [ebp - 4], ebx
$sequence_7 = { 0f8282000000 8b06 83f809 7772 }
// n = 4, score = 2000
// 0f8282000000 | jb 0x245cb3d
// 8b06 | mov eax, dword ptr [esi]
// 83f809 | cmp eax, 9
// 7772 | ja 0x245cb34
$sequence_8 = { 2b4704 c6471000 89470c 895f14 }
// n = 4, score = 2000
// 2b4704 | sub eax, dword ptr [edi + 4]
// c6471000 | mov byte ptr [edi + 0x10], 0
// 89470c | mov dword ptr [edi + 0xc], eax
// 895f14 | mov dword ptr [edi + 0x14], ebx
$sequence_9 = { 0f8422030000 8b45fc 0fb600 ff4df8 }
// n = 4, score = 2000
// 0f8422030000 | je 0x24305dd
// 8b45fc | mov eax, dword ptr [ebp - 4]
// 0fb600 | movzx eax, byte ptr [eax]
// ff4df8 | dec dword ptr [ebp - 8]
condition:
7 of them
}
rule win_shylock_w0 {
meta:
author = "Jean-Philippe Teissier / @Jipe_"
description = "Shylock Banker"
date = "2013-12-12"
version = "1.0"
ref1 = "http://iocbucket.com/iocs/1b4660d57928df5ca843c21df0b2adb117026cba"
ref2 = "http://www.trusteer.com/blog/merchant-fraud-returns-%E2%80%93-shylock-polymorphic-financial-malware-infections-rise"
ref3 = "https://www.csis.dk/en/csis/blog/3811/"
source = "https://github.com/mattulm/sfiles_yara/blob/master/malware/Shylock.yar"
malpedia_version = "20170517"
malpedia_license = "CC BY-NC-SA 4.0"
malpedia_sharing = "TLP:WHITE"
strings:
$process1 = "MASTER"
$process2 = "_SHUTDOWN"
$process3 = "EVT_VNC"
$process4 = "EVT_BACK"
$process5 = "EVT_VNC"
$process6 = "IE_Hook::GetRequestInfo"
$process7 = "FF_Hook::getRequestInfo"
$process8 = "EX_Hook::CreateProcess"
$process9 = "hijackdll.dll"
$process10 = "MTX_"
$process11 = "FF::PR_WriteHook entry"
$process12 = "FF::PR_WriteHook exit"
$process13 = "HijackProcessAttach::*** MASTER *** MASTER *** MASTER *** %s PID=%u"
$process14 = "HijackProcessAttach::entry"
$process15 = "FF::BEFORE INJECT"
$process16 = "FF::AFTER INJECT"
$process17 = "IE::AFTER INJECT"
$process18 = "IE::BEFORE INJECT"
$process19 = "*** VNC *** VNC *** VNC *** VNC *** VNC *** VNC *** VNC *** VNC *** VNC *** VNC *** %s"
$process20 = "*** LOG INJECTS *** %s"
$process21 = "*** inject to process %s not allowed"
$process22 = "*** BackSocks *** BackSocks *** BackSocks *** BackSocks *** BackSocks *** BackSocks *** BackSocks *** %s"
$process23 = "Inject::InjectDllFromMemory"
$process24 = "BadSocks.dll"
$process25 = ".?AVFF_Hook@@"
$process26 = ".?AVIE_Hook@@"
$process27 = ".?AVPE_Hook@@"
$process28 = ".?AVCInetMethods@@"
$domain1 = "extensadv.cc"
$domain2 = "topbeat.cc"
$domain3 = "brainsphere.cc"
$domain4 = "commonworldme.cc"
$domain5 = "gigacat.cc"
$domain6 = "nw-serv.cc"
$domain7 = "paragua-analyst.cc"
condition:
3 of ($process*) or any of ($domain*)
}