rule win_carberp_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.carberp"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { ffe0 c3 55 8bec 51 53 56 }
            // n = 7, score = 200
            //   ffe0                 | jmp                 eax
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   51                   | push                ecx
            //   53                   | push                ebx
            //   56                   | push                esi

        $sequence_1 = { e8???????? 6a01 56 ff742418 e8???????? 6a05 56 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   6a01                 | push                1
            //   56                   | push                esi
            //   ff742418             | push                dword ptr [esp + 0x18]
            //   e8????????           |                     
            //   6a05                 | push                5
            //   56                   | push                esi

        $sequence_2 = { 395f08 7515 837c240c00 7412 ff74240c e8???????? 59 }
            // n = 7, score = 200
            //   395f08               | cmp                 dword ptr [edi + 8], ebx
            //   7515                 | jne                 0x17
            //   837c240c00           | cmp                 dword ptr [esp + 0xc], 0
            //   7412                 | je                  0x14
            //   ff74240c             | push                dword ptr [esp + 0xc]
            //   e8????????           |                     
            //   59                   | pop                 ecx

        $sequence_3 = { ff7508 c78530fdffff02000100 89b5e0fdffff e8???????? 8d8530fdffff 50 ff750c }
            // n = 7, score = 200
            //   ff7508               | push                dword ptr [ebp + 8]
            //   c78530fdffff02000100     | mov    dword ptr [ebp - 0x2d0], 0x10002
            //   89b5e0fdffff         | mov                 dword ptr [ebp - 0x220], esi
            //   e8????????           |                     
            //   8d8530fdffff         | lea                 eax, [ebp - 0x2d0]
            //   50                   | push                eax
            //   ff750c               | push                dword ptr [ebp + 0xc]

        $sequence_4 = { ff5004 8b460c 5e c3 817c2404387204f8 750e 817c240875f8fa4d }
            // n = 7, score = 200
            //   ff5004               | call                dword ptr [eax + 4]
            //   8b460c               | mov                 eax, dword ptr [esi + 0xc]
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   817c2404387204f8     | cmp                 dword ptr [esp + 4], 0xf8047238
            //   750e                 | jne                 0x10
            //   817c240875f8fa4d     | cmp                 dword ptr [esp + 8], 0x4dfaf875

        $sequence_5 = { ff750c e8???????? 59 894510 56 8b7508 8b06 }
            // n = 7, score = 200
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   894510               | mov                 dword ptr [ebp + 0x10], eax
            //   56                   | push                esi
            //   8b7508               | mov                 esi, dword ptr [ebp + 8]
            //   8b06                 | mov                 eax, dword ptr [esi]

        $sequence_6 = { ff75f8 ff7508 e8???????? 83c410 8945f4 85c0 7e57 }
            // n = 7, score = 200
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax
            //   85c0                 | test                eax, eax
            //   7e57                 | jle                 0x59

        $sequence_7 = { 837d0800 7479 57 8b7d0c 85ff 7470 }
            // n = 6, score = 200
            //   837d0800             | cmp                 dword ptr [ebp + 8], 0
            //   7479                 | je                  0x7b
            //   57                   | push                edi
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]
            //   85ff                 | test                edi, edi
            //   7470                 | je                  0x72

        $sequence_8 = { 85ff 744c 8b750c 85f6 7445 83650800 56 }
            // n = 7, score = 200
            //   85ff                 | test                edi, edi
            //   744c                 | je                  0x4e
            //   8b750c               | mov                 esi, dword ptr [ebp + 0xc]
            //   85f6                 | test                esi, esi
            //   7445                 | je                  0x47
            //   83650800             | and                 dword ptr [ebp + 8], 0
            //   56                   | push                esi

        $sequence_9 = { ff7608 e8???????? 59 59 c706???????? 5e c3 }
            // n = 7, score = 200
            //   ff7608               | push                dword ptr [esi + 8]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   c706????????         |                     
            //   5e                   | pop                 esi
            //   c3                   | ret                 

    condition:
        7 of them and filesize < 491520
}