rule win_carbanak_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        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 = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 6a02 e8???????? 59 59 ffd0 8ac3 5b }
            // n = 7, score = 200
            //   6a02                 | push                2
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   ffd0                 | call                eax
            //   8ac3                 | mov                 al, bl
            //   5b                   | pop                 ebx

        $sequence_1 = { 57 6803000080 8d4dfc e8???????? 6aff 33db 53 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   6803000080           | push                0x80000003
            //   8d4dfc               | lea                 ecx, [ebp - 4]
            //   e8????????           |                     
            //   6aff                 | push                -1
            //   33db                 | xor                 ebx, ebx
            //   53                   | push                ebx

        $sequence_2 = { 8b750c 8d4220 57 33ff 8d5a60 84c9 0f45d8 }
            // n = 7, score = 200
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   8d4220               | lea                 eax, [edx + 0x20]
            //   57                   | push                edi
            //   33ff                 | xor                 edi, edi
            //   8d5a60               | lea                 ebx, [edx + 0x60]
            //   84c9                 | test                cl, cl
            //   0f45d8               | cmovne              ebx, eax

        $sequence_3 = { e8???????? 83c40c 84c0 744c 6810270000 8d8df4feffff e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   84c0                 | test                al, al
            //   744c                 | je                  0x4e
            //   6810270000           | push                0x2710
            //   8d8df4feffff         | lea                 ecx, [ebp - 0x10c]
            //   e8????????           |                     

        $sequence_4 = { 8d85a0feffff 8bfb 50 8d8d90feffff 897df0 e8???????? 6aff }
            // n = 7, score = 200
            //   8d85a0feffff         | lea                 eax, [ebp - 0x160]
            //   8bfb                 | mov                 edi, ebx
            //   50                   | push                eax
            //   8d8d90feffff         | lea                 ecx, [ebp - 0x170]
            //   897df0               | mov                 dword ptr [ebp - 0x10], edi
            //   e8????????           |                     
            //   6aff                 | push                -1

        $sequence_5 = { 5d c20400 56 57 8bf1 33ff 397e08 }
            // n = 7, score = 200
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   56                   | push                esi
            //   57                   | push                edi
            //   8bf1                 | mov                 esi, ecx
            //   33ff                 | xor                 edi, edi
            //   397e08               | cmp                 dword ptr [esi + 8], edi

        $sequence_6 = { 50 ff7510 ff7514 57 ff7508 e8???????? 83c418 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   57                   | push                edi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18

        $sequence_7 = { 57 e8???????? 8b4510 8b750c 50 57 894620 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   e8????????           |                     
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   50                   | push                eax
            //   57                   | push                edi
            //   894620               | mov                 dword ptr [esi + 0x20], eax

        $sequence_8 = { 8bce e8???????? 56 e8???????? 59 8b450c 5e }
            // n = 7, score = 200
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   5e                   | pop                 esi

        $sequence_9 = { 84c0 751d 6a01 e8???????? 59 ff75f0 ffd0 }
            // n = 7, score = 200
            //   84c0                 | test                al, al
            //   751d                 | jne                 0x1f
            //   6a01                 | push                1
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   ff75f0               | push                dword ptr [ebp - 0x10]
            //   ffd0                 | call                eax

    condition:
        7 of them and filesize < 425984
}