rule win_shylock_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2019-11-26"
        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 = "20190204"
        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 = { 5f 5d c20400 56 8bf0 e8???????? 8bc6 }
            // n = 7, score = 200
            //   5f                   | pop                 edi
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   56                   | push                esi
            //   8bf0                 | mov                 esi, eax
            //   e8????????           |                     
            //   8bc6                 | mov                 eax, esi

        $sequence_1 = { e8???????? 85ff 7508 8d75b8 e9???????? 8b4508 57 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   85ff                 | test                edi, edi
            //   7508                 | jne                 0xa
            //   8d75b8               | lea                 esi, [ebp - 0x48]
            //   e9????????           |                     
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   57                   | push                edi

        $sequence_2 = { 8bc7 5e c9 c20400 55 8bec ff7508 }
            // n = 7, score = 200
            //   8bc7                 | mov                 eax, edi
            //   5e                   | pop                 esi
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_3 = { c78564ffffff00008000 eb07 83a564ffffff00 8b8564ffffff 0d00f70484 894520 c645fb01 }
            // n = 7, score = 200
            //   c78564ffffff00008000     | mov    dword ptr [ebp - 0x9c], 0x800000
            //   eb07                 | jmp                 9
            //   83a564ffffff00       | and                 dword ptr [ebp - 0x9c], 0
            //   8b8564ffffff         | mov                 eax, dword ptr [ebp - 0x9c]
            //   0d00f70484           | or                  eax, 0x8404f700
            //   894520               | mov                 dword ptr [ebp + 0x20], eax
            //   c645fb01             | mov                 byte ptr [ebp - 5], 1

        $sequence_4 = { 50 ff750c 33f6 ff7508 c785b8fdffff01000000 89b5bcfdffff 89b5c0fdffff }
            // n = 7, score = 200
            //   50                   | push                eax
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   33f6                 | xor                 esi, esi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   c785b8fdffff01000000     | mov    dword ptr [ebp - 0x248], 1
            //   89b5bcfdffff         | mov                 dword ptr [ebp - 0x244], esi
            //   89b5c0fdffff         | mov                 dword ptr [ebp - 0x240], esi

        $sequence_5 = { 6a01 e8???????? 59 c3 6a00 e8???????? 59 }
            // n = 7, score = 200
            //   6a01                 | push                1
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   c3                   | ret                 
            //   6a00                 | push                0
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_6 = { 2bc1 85c0 7f0d 7810 42 84db 75b5 }
            // n = 7, score = 200
            //   2bc1                 | sub                 eax, ecx
            //   85c0                 | test                eax, eax
            //   7f0d                 | jg                  0xf
            //   7810                 | js                  0x12
            //   42                   | inc                 edx
            //   84db                 | test                bl, bl
            //   75b5                 | jne                 0xffffffb7

        $sequence_7 = { e8???????? 8d45e0 50 e8???????? ff75f0 e8???????? 59 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8d45e0               | lea                 eax, [ebp - 0x20]
            //   50                   | push                eax
            //   e8????????           |                     
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_8 = { e8???????? 3b450c 7d8f ff7508 8bc1 e8???????? 33c0 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   3b450c               | cmp                 eax, dword ptr [ebp + 0xc]
            //   7d8f                 | jge                 0xffffff91
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8bc1                 | mov                 eax, ecx
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax

        $sequence_9 = { 8b45c4 eb20 8d75e4 e8???????? ff7510 ff750c ff7508 }
            // n = 7, score = 200
            //   8b45c4               | mov                 eax, dword ptr [ebp - 0x3c]
            //   eb20                 | jmp                 0x22
            //   8d75e4               | lea                 esi, [ebp - 0x1c]
            //   e8????????           |                     
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                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_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.shylock"
        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*)
}