rule win_carbanak_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.carbanak"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 3913 7415 8b4104 52 52 ff33 ff30 }
            // n = 7, score = 200
            //   3913                 | cmp                 dword ptr [ebx], edx
            //   7415                 | je                  0x17
            //   8b4104               | mov                 eax, dword ptr [ecx + 4]
            //   52                   | push                edx
            //   52                   | push                edx
            //   ff33                 | push                dword ptr [ebx]
            //   ff30                 | push                dword ptr [eax]

        $sequence_1 = { 57 68a68b0700 6a06 e8???????? 59 59 ffd0 }
            // n = 7, score = 200
            //   57                   | push                edi
            //   68a68b0700           | push                0x78ba6
            //   6a06                 | push                6
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   ffd0                 | call                eax

        $sequence_2 = { 7415 ff7518 8d4610 50 8d4620 50 6a00 }
            // n = 7, score = 200
            //   7415                 | je                  0x17
            //   ff7518               | push                dword ptr [ebp + 0x18]
            //   8d4610               | lea                 eax, [esi + 0x10]
            //   50                   | push                eax
            //   8d4620               | lea                 eax, [esi + 0x20]
            //   50                   | push                eax
            //   6a00                 | push                0

        $sequence_3 = { 8802 42 49 75f7 8bc7 5f 5e }
            // n = 7, score = 200
            //   8802                 | mov                 byte ptr [edx], al
            //   42                   | inc                 edx
            //   49                   | dec                 ecx
            //   75f7                 | jne                 0xfffffff9
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi

        $sequence_4 = { 83610400 8bc1 c3 55 8bec 8d4510 50 }
            // n = 7, score = 200
            //   83610400             | and                 dword ptr [ecx + 4], 0
            //   8bc1                 | mov                 eax, ecx
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8d4510               | lea                 eax, [ebp + 0x10]
            //   50                   | push                eax

        $sequence_5 = { 51 52 68???????? e8???????? 83c424 837e2000 }
            // n = 6, score = 200
            //   51                   | push                ecx
            //   52                   | push                edx
            //   68????????           |                     
            //   e8????????           |                     
            //   83c424               | add                 esp, 0x24
            //   837e2000             | cmp                 dword ptr [esi + 0x20], 0

        $sequence_6 = { 8bf8 6880000000 57 e8???????? 56 ff750c }
            // n = 6, score = 200
            //   8bf8                 | mov                 edi, eax
            //   6880000000           | push                0x80
            //   57                   | push                edi
            //   e8????????           |                     
            //   56                   | push                esi
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_7 = { c3 55 8bec 51 51 8d45ff 56 }
            // n = 7, score = 200
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   51                   | push                ecx
            //   51                   | push                ecx
            //   8d45ff               | lea                 eax, [ebp - 1]
            //   56                   | push                esi

        $sequence_8 = { 4e 79f6 c60200 5e c9 c3 55 }
            // n = 7, score = 200
            //   4e                   | dec                 esi
            //   79f6                 | jns                 0xfffffff8
            //   c60200               | mov                 byte ptr [edx], 0
            //   5e                   | pop                 esi
            //   c9                   | leave               
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_9 = { ff750c 6814bbf609 6a02 e8???????? 59 59 ffd0 }
            // n = 7, score = 200
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   6814bbf609           | push                0x9f6bb14
            //   6a02                 | push                2
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   ffd0                 | call                eax

    condition:
        7 of them and filesize < 425984
}