rule win_zeus_action_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.zeus_action"
        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 = { eb08 6a08 5a 3bca 0f44c2 8b5510 8945f8 }
            // n = 7, score = 300
            //   eb08                 | jmp                 0xa
            //   6a08                 | push                8
            //   5a                   | pop                 edx
            //   3bca                 | cmp                 ecx, edx
            //   0f44c2               | cmove               eax, edx
            //   8b5510               | mov                 edx, dword ptr [ebp + 0x10]
            //   8945f8               | mov                 dword ptr [ebp - 8], eax

        $sequence_1 = { e8???????? 6a2b 8d75f4 58 e8???????? 32db 57 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   6a2b                 | push                0x2b
            //   8d75f4               | lea                 esi, [ebp - 0xc]
            //   58                   | pop                 eax
            //   e8????????           |                     
            //   32db                 | xor                 bl, bl
            //   57                   | push                edi

        $sequence_2 = { 53 e8???????? 59 59 894508 85c0 0f84fbfeffff }
            // n = 7, score = 300
            //   53                   | push                ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   85c0                 | test                eax, eax
            //   0f84fbfeffff         | je                  0xffffff01

        $sequence_3 = { 2bca 8d4101 668945f8 56 57 8dbba8000000 03bbd8750000 }
            // n = 7, score = 300
            //   2bca                 | sub                 ecx, edx
            //   8d4101               | lea                 eax, [ecx + 1]
            //   668945f8             | mov                 word ptr [ebp - 8], ax
            //   56                   | push                esi
            //   57                   | push                edi
            //   8dbba8000000         | lea                 edi, [ebx + 0xa8]
            //   03bbd8750000         | add                 edi, dword ptr [ebx + 0x75d8]

        $sequence_4 = { e8???????? 8bf0 59 85f6 75d7 57 e8???????? }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   59                   | pop                 ecx
            //   85f6                 | test                esi, esi
            //   75d7                 | jne                 0xffffffd9
            //   57                   | push                edi
            //   e8????????           |                     

        $sequence_5 = { 8a0408 8802 42 46 3bd3 72f2 8b4d24 }
            // n = 7, score = 300
            //   8a0408               | mov                 al, byte ptr [eax + ecx]
            //   8802                 | mov                 byte ptr [edx], al
            //   42                   | inc                 edx
            //   46                   | inc                 esi
            //   3bd3                 | cmp                 edx, ebx
            //   72f2                 | jb                  0xfffffff4
            //   8b4d24               | mov                 ecx, dword ptr [ebp + 0x24]

        $sequence_6 = { 5f 5e c20400 56 8b742408 837e4000 7411 }
            // n = 7, score = 300
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   c20400               | ret                 4
            //   56                   | push                esi
            //   8b742408             | mov                 esi, dword ptr [esp + 8]
            //   837e4000             | cmp                 dword ptr [esi + 0x40], 0
            //   7411                 | je                  0x13

        $sequence_7 = { 56 e8???????? 83c40c 85c0 78e2 85ff 7411 }
            // n = 7, score = 300
            //   56                   | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   78e2                 | js                  0xffffffe4
            //   85ff                 | test                edi, edi
            //   7411                 | je                  0x13

        $sequence_8 = { 7461 8b442414 3bc6 7659 e8???????? 89442410 }
            // n = 6, score = 300
            //   7461                 | je                  0x63
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]
            //   3bc6                 | cmp                 eax, esi
            //   7659                 | jbe                 0x5b
            //   e8????????           |                     
            //   89442410             | mov                 dword ptr [esp + 0x10], eax

        $sequence_9 = { e8???????? 8b55e8 8b4d08 8ac3 d0eb 83c40c 42 }
            // n = 7, score = 300
            //   e8????????           |                     
            //   8b55e8               | mov                 edx, dword ptr [ebp - 0x18]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8ac3                 | mov                 al, bl
            //   d0eb                 | shr                 bl, 1
            //   83c40c               | add                 esp, 0xc
            //   42                   | inc                 edx

    condition:
        7 of them and filesize < 827392
}