rule win_carbanak_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.carbanak"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        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 / approach 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 = { 385d08 7410 68e8030000 e8???????? 59 }
            // n = 5, score = 200
            //   385d08               | cmp                 byte ptr [ebp + 8], bl
            //   7410                 | je                  0x12
            //   68e8030000           | push                0x3e8
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_1 = { 8b4704 83e6fc 48 c7470808000000 }
            // n = 4, score = 200
            //   8b4704               | mov                 eax, dword ptr [edi + 4]
            //   83e6fc               | and                 esi, 0xfffffffc
            //   48                   | dec                 eax
            //   c7470808000000       | mov                 dword ptr [edi + 8], 8

        $sequence_2 = { 1ac0 fec0 5d c20c00 55 8bec 83ec68 }
            // n = 7, score = 200
            //   1ac0                 | sbb                 al, al
            //   fec0                 | inc                 al
            //   5d                   | pop                 ebp
            //   c20c00               | ret                 0xc
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   83ec68               | sub                 esp, 0x68

        $sequence_3 = { 46 3b75f8 7c8b eb1a 8b4d08 6bf62c 6aff }
            // n = 7, score = 200
            //   46                   | inc                 esi
            //   3b75f8               | cmp                 esi, dword ptr [ebp - 8]
            //   7c8b                 | jl                  0xffffff8d
            //   eb1a                 | jmp                 0x1c
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   6bf62c               | imul                esi, esi, 0x2c
            //   6aff                 | push                -1

        $sequence_4 = { 68336cd907 6a00 e8???????? 59 59 ffd0 c3 }
            // n = 7, score = 200
            //   68336cd907           | push                0x7d96c33
            //   6a00                 | push                0
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   ffd0                 | call                eax
            //   c3                   | ret                 

        $sequence_5 = { 89be84020000 e8???????? 8d8640020000 50 e8???????? 8d8660020000 }
            // n = 6, score = 200
            //   89be84020000         | mov                 dword ptr [esi + 0x284], edi
            //   e8????????           |                     
            //   8d8640020000         | lea                 eax, [esi + 0x240]
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d8660020000         | lea                 eax, [esi + 0x260]

        $sequence_6 = { 56 e8???????? eb12 8d4645 50 }
            // n = 5, score = 200
            //   56                   | push                esi
            //   e8????????           |                     
            //   eb12                 | jmp                 0x14
            //   8d4645               | lea                 eax, [esi + 0x45]
            //   50                   | push                eax

        $sequence_7 = { e9???????? 55 8bec 81eccc000000 53 }
            // n = 5, score = 200
            //   e9????????           |                     
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81eccc000000         | sub                 esp, 0xcc
            //   53                   | push                ebx

        $sequence_8 = { 8b5624 ebb9 8b450c ebb7 55 8bec }
            // n = 6, score = 200
            //   8b5624               | mov                 edx, dword ptr [esi + 0x24]
            //   ebb9                 | jmp                 0xffffffbb
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   ebb7                 | jmp                 0xffffffb9
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_9 = { 8bec 8b4d0c 56 8b4104 8b7508 48 57 }
            // n = 7, score = 200
            //   8bec                 | mov                 ebp, esp
            //   8b4d0c               | mov                 ecx, dword ptr [ebp + 0xc]
            //   56                   | push                esi
            //   8b4104               | mov                 eax, dword ptr [ecx + 4]
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   48                   | dec                 eax
            //   57                   | push                edi

    condition:
        7 of them and filesize < 425984
}