rule win_carbanak_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.carbanak."
        info = "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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 8b8190060000 69c0a8000000 50 51 8bce e8???????? 8b450c }
            // n = 7, score = 200
            //   8b8190060000         | mov                 eax, dword ptr [ecx + 0x690]
            //   69c0a8000000         | imul                eax, eax, 0xa8
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]

        $sequence_1 = { 8bd8 59 3bdf 7f44 8d4f01 51 e8???????? }
            // n = 7, score = 200
            //   8bd8                 | mov                 ebx, eax
            //   59                   | pop                 ecx
            //   3bdf                 | cmp                 ebx, edi
            //   7f44                 | jg                  0x46
            //   8d4f01               | lea                 ecx, dword ptr [edi + 1]
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_2 = { 50 6aff ff7508 33db e8???????? 83c410 8d45b8 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   6aff                 | push                -1
            //   ff7508               | push                dword ptr [ebp + 8]
            //   33db                 | xor                 ebx, ebx
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   8d45b8               | lea                 eax, dword ptr [ebp - 0x48]

        $sequence_3 = { 89be2c010000 897d08 6a04 8d4508 8dbe28010000 50 8bcf }
            // n = 7, score = 200
            //   89be2c010000         | mov                 dword ptr [esi + 0x12c], edi
            //   897d08               | mov                 dword ptr [ebp + 8], edi
            //   6a04                 | push                4
            //   8d4508               | lea                 eax, dword ptr [ebp + 8]
            //   8dbe28010000         | lea                 edi, dword ptr [esi + 0x128]
            //   50                   | push                eax
            //   8bcf                 | mov                 ecx, edi

        $sequence_4 = { 83f812 0f95c3 33c0 894508 83c306 394744 }
            // n = 6, score = 200
            //   83f812               | cmp                 eax, 0x12
            //   0f95c3               | setne               bl
            //   33c0                 | xor                 eax, eax
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   83c306               | add                 ebx, 6
            //   394744               | cmp                 dword ptr [edi + 0x44], eax

        $sequence_5 = { 8b07 56 ff750c 03c3 50 e8???????? 8b4d10 }
            // n = 7, score = 200
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   56                   | push                esi
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   03c3                 | add                 eax, ebx
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b4d10               | mov                 ecx, dword ptr [ebp + 0x10]

        $sequence_6 = { 56 51 e8???????? 83c40c a1???????? 47 3b7de0 }
            // n = 7, score = 200
            //   56                   | push                esi
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   a1????????           |                     
            //   47                   | inc                 edi
            //   3b7de0               | cmp                 edi, dword ptr [ebp - 0x20]

        $sequence_7 = { 8d4dc0 e8???????? 8d8d78ffffff e8???????? 5b 33c0 c9 }
            // n = 7, score = 200
            //   8d4dc0               | lea                 ecx, dword ptr [ebp - 0x40]
            //   e8????????           |                     
            //   8d8d78ffffff         | lea                 ecx, dword ptr [ebp - 0x88]
            //   e8????????           |                     
            //   5b                   | pop                 ebx
            //   33c0                 | xor                 eax, eax
            //   c9                   | leave               

        $sequence_8 = { 740b 8b01 8945f0 3b06 75ca eb08 8b7df0 }
            // n = 7, score = 200
            //   740b                 | je                  0xd
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   3b06                 | cmp                 eax, dword ptr [esi]
            //   75ca                 | jne                 0xffffffcc
            //   eb08                 | jmp                 0xa
            //   8b7df0               | mov                 edi, dword ptr [ebp - 0x10]

        $sequence_9 = { 51 e8???????? 83c40c a1???????? 47 3b7de0 7c9f }
            // n = 7, score = 200
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   a1????????           |                     
            //   47                   | inc                 edi
            //   3b7de0               | cmp                 edi, dword ptr [ebp - 0x20]
            //   7c9f                 | jl                  0xffffffa1

    condition:
        7 of them and filesize < 425984
}