rule win_carbanak_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.carbanak"
        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 = { 8bec 8b4508 33c9 51 51 51 ff7004 }
            // n = 7, score = 200
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   33c9                 | xor                 ecx, ecx
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   ff7004               | push                dword ptr [eax + 4]

        $sequence_1 = { ff35???????? 8d45d0 50 e8???????? 83c418 8d45b0 ff750c }
            // n = 7, score = 200
            //   ff35????????         |                     
            //   8d45d0               | lea                 eax, [ebp - 0x30]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   8d45b0               | lea                 eax, [ebp - 0x50]
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_2 = { 83c40c 85c0 0f843a010000 8d8560ffffff 8945f0 8b45c4 8945e8 }
            // n = 7, score = 200
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   0f843a010000         | je                  0x140
            //   8d8560ffffff         | lea                 eax, [ebp - 0xa0]
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   8b45c4               | mov                 eax, dword ptr [ebp - 0x3c]
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax

        $sequence_3 = { a1???????? 8b0d???????? 8b15???????? eb22 8b15???????? 8b0d???????? a1???????? }
            // n = 7, score = 200
            //   a1????????           |                     
            //   8b0d????????         |                     
            //   8b15????????         |                     
            //   eb22                 | jmp                 0x24
            //   8b15????????         |                     
            //   8b0d????????         |                     
            //   a1????????           |                     

        $sequence_4 = { e8???????? 59 59 8945f4 85c0 7508 83c8ff }
            // n = 7, score = 200
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   85c0                 | test                eax, eax
            //   7508                 | jne                 0xa
            //   83c8ff               | or                  eax, 0xffffffff

        $sequence_5 = { e8???????? 59 59 ffd0 8b45fc 5e }
            // n = 6, score = 200
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   ffd0                 | call                eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   5e                   | pop                 esi

        $sequence_6 = { bb???????? 85c0 7e22 ba???????? 3932 740d 41 }
            // n = 7, score = 200
            //   bb????????           |                     
            //   85c0                 | test                eax, eax
            //   7e22                 | jle                 0x24
            //   ba????????           |                     
            //   3932                 | cmp                 dword ptr [edx], esi
            //   740d                 | je                  0xf
            //   41                   | inc                 ecx

        $sequence_7 = { 8b5604 48 3bd0 7d14 8b0e 8a4508 88040a }
            // n = 7, score = 200
            //   8b5604               | mov                 edx, dword ptr [esi + 4]
            //   48                   | dec                 eax
            //   3bd0                 | cmp                 edx, eax
            //   7d14                 | jge                 0x16
            //   8b0e                 | mov                 ecx, dword ptr [esi]
            //   8a4508               | mov                 al, byte ptr [ebp + 8]
            //   88040a               | mov                 byte ptr [edx + ecx], al

        $sequence_8 = { 56 68???????? 50 be031d3c0b 56 57 e8???????? }
            // n = 7, score = 200
            //   56                   | push                esi
            //   68????????           |                     
            //   50                   | push                eax
            //   be031d3c0b           | mov                 esi, 0xb3c1d03
            //   56                   | push                esi
            //   57                   | push                edi
            //   e8????????           |                     

        $sequence_9 = { 8d45f0 50 e8???????? ff75f4 ff75f0 6a00 }
            // n = 6, score = 200
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax
            //   e8????????           |                     
            //   ff75f4               | push                dword ptr [ebp - 0xc]
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   6a00                 | push                0

    condition:
        7 of them and filesize < 425984
}