rule win_shylock_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.shylock"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        malpedia_license = "CC BY-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 is published 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 = { 8d75fc e8???????? 8bc7 e9???????? 8d85f0feffff 50 e8???????? }
            // n = 7, score = 400
            //   8d75fc               | lea                 esi, [ebp - 4]
            //   e8????????           |                     
            //   8bc7                 | mov                 eax, edi
            //   e9????????           |                     
            //   8d85f0feffff         | lea                 eax, [ebp - 0x110]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_1 = { 8db540ffffff e8???????? 8db57cffffff e9???????? 8db57cffffff e8???????? 8d45a4 }
            // n = 7, score = 400
            //   8db540ffffff         | lea                 esi, [ebp - 0xc0]
            //   e8????????           |                     
            //   8db57cffffff         | lea                 esi, [ebp - 0x84]
            //   e9????????           |                     
            //   8db57cffffff         | lea                 esi, [ebp - 0x84]
            //   e8????????           |                     
            //   8d45a4               | lea                 eax, [ebp - 0x5c]

        $sequence_2 = { e8???????? 8d8554ffffff e8???????? 3c01 7411 8b75dc 83c618 }
            // n = 7, score = 400
            //   e8????????           |                     
            //   8d8554ffffff         | lea                 eax, [ebp - 0xac]
            //   e8????????           |                     
            //   3c01                 | cmp                 al, 1
            //   7411                 | je                  0x13
            //   8b75dc               | mov                 esi, dword ptr [ebp - 0x24]
            //   83c618               | add                 esi, 0x18

        $sequence_3 = { e8???????? ff742420 8d742440 e8???????? ff74242c 8bfe e8???????? }
            // n = 7, score = 400
            //   e8????????           |                     
            //   ff742420             | push                dword ptr [esp + 0x20]
            //   8d742440             | lea                 esi, [esp + 0x40]
            //   e8????????           |                     
            //   ff74242c             | push                dword ptr [esp + 0x2c]
            //   8bfe                 | mov                 edi, esi
            //   e8????????           |                     

        $sequence_4 = { e8???????? 8b45fc 83c018 e8???????? 0fb6c0 85c0 7514 }
            // n = 7, score = 400
            //   e8????????           |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   83c018               | add                 eax, 0x18
            //   e8????????           |                     
            //   0fb6c0               | movzx               eax, al
            //   85c0                 | test                eax, eax
            //   7514                 | jne                 0x16

        $sequence_5 = { 50 b8???????? e8???????? 59 8bd8 8d75fc }
            // n = 6, score = 400
            //   50                   | push                eax
            //   b8????????           |                     
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8bd8                 | mov                 ebx, eax
            //   8d75fc               | lea                 esi, [ebp - 4]

        $sequence_6 = { e8???????? 50 a1???????? ffb0bc000000 e8???????? 83c410 3d02010000 }
            // n = 7, score = 400
            //   e8????????           |                     
            //   50                   | push                eax
            //   a1????????           |                     
            //   ffb0bc000000         | push                dword ptr [eax + 0xbc]
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   3d02010000           | cmp                 eax, 0x102

        $sequence_7 = { ff750c 750f e8???????? 50 e8???????? 59 59 }
            // n = 7, score = 400
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   750f                 | jne                 0x11
            //   e8????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx

        $sequence_8 = { 8d7dd0 ab ab 33c0 8d7de8 ab ab }
            // n = 7, score = 400
            //   8d7dd0               | lea                 edi, [ebp - 0x30]
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   33c0                 | xor                 eax, eax
            //   8d7de8               | lea                 edi, [ebp - 0x18]
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax

        $sequence_9 = { 68???????? ff75f4 8bc6 6801000080 e8???????? 8bde 8b7508 }
            // n = 7, score = 400
            //   68????????           |                     
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   8bc6                 | mov                 eax, esi
            //   6801000080           | push                0x80000001
            //   e8????????           |                     
            //   8bde                 | mov                 ebx, esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]

    condition:
        7 of them and filesize < 622592
}

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*)
}