rule win_carbanak_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        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 = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 8d83c4010000 50 8d8db4fcffff e8???????? 8d8db4fcffff e8???????? 8b75ec }
            // n = 7, score = 200
            //   8d83c4010000         | lea                 eax, [ebx + 0x1c4]
            //   50                   | push                eax
            //   8d8db4fcffff         | lea                 ecx, [ebp - 0x34c]
            //   e8????????           |                     
            //   8d8db4fcffff         | lea                 ecx, [ebp - 0x34c]
            //   e8????????           |                     
            //   8b75ec               | mov                 esi, dword ptr [ebp - 0x14]

        $sequence_1 = { 56 8bcf e8???????? 84c0 7507 8b7708 }
            // n = 6, score = 200
            //   56                   | push                esi
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   84c0                 | test                al, al
            //   7507                 | jne                 9
            //   8b7708               | mov                 esi, dword ptr [edi + 8]

        $sequence_2 = { 50 e8???????? 8bf8 59 85ff 747e 8b4dfc }
            // n = 7, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   59                   | pop                 ecx
            //   85ff                 | test                edi, edi
            //   747e                 | je                  0x80
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_3 = { ff30 6821b2c90d 6a01 e8???????? 59 59 ffd0 }
            // n = 7, score = 200
            //   ff30                 | push                dword ptr [eax]
            //   6821b2c90d           | push                0xdc9b221
            //   6a01                 | push                1
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   ffd0                 | call                eax

        $sequence_4 = { 6a3c e8???????? 83c40c 85c0 7409 8bc8 e8???????? }
            // n = 7, score = 200
            //   6a3c                 | push                0x3c
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   7409                 | je                  0xb
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     

        $sequence_5 = { eb11 6a00 ff7514 57 ff7508 e8???????? }
            // n = 6, score = 200
            //   eb11                 | jmp                 0x13
            //   6a00                 | push                0
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   57                   | push                edi
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     

        $sequence_6 = { 50 e8???????? 83ec28 8d75cc 6a0c 59 8bfc }
            // n = 7, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   83ec28               | sub                 esp, 0x28
            //   8d75cc               | lea                 esi, [ebp - 0x34]
            //   6a0c                 | push                0xc
            //   59                   | pop                 ecx
            //   8bfc                 | mov                 edi, esp

        $sequence_7 = { 0f851f010000 f605????????20 7413 8b486c ba00200000 6685540146 0f8403010000 }
            // n = 7, score = 200
            //   0f851f010000         | jne                 0x125
            //   f605????????20       |                     
            //   7413                 | je                  0x15
            //   8b486c               | mov                 ecx, dword ptr [eax + 0x6c]
            //   ba00200000           | mov                 edx, 0x2000
            //   6685540146           | test                word ptr [ecx + eax + 0x46], dx
            //   0f8403010000         | je                  0x109

        $sequence_8 = { ff75ec ff75e8 57 56 ff30 e8???????? ff75fc }
            // n = 7, score = 200
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   57                   | push                edi
            //   56                   | push                esi
            //   ff30                 | push                dword ptr [eax]
            //   e8????????           |                     
            //   ff75fc               | push                dword ptr [ebp - 4]

        $sequence_9 = { f77d0c 83c410 6aff 53 6880000000 6bc018 }
            // n = 6, score = 200
            //   f77d0c               | idiv                dword ptr [ebp + 0xc]
            //   83c410               | add                 esp, 0x10
            //   6aff                 | push                -1
            //   53                   | push                ebx
            //   6880000000           | push                0x80
            //   6bc018               | imul                eax, eax, 0x18

    condition:
        7 of them and filesize < 425984
}