rule win_carberp_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.carberp"
        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 = { e8???????? 6a10 e8???????? 8bf0 8d45a0 50 }
            // n = 6, score = 200
            //   e8????????           |                     
            //   6a10                 | push                0x10
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   8d45a0               | lea                 eax, [ebp - 0x60]
            //   50                   | push                eax

        $sequence_1 = { e8???????? ff7508 8903 e8???????? 8d4508 50 897d08 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8903                 | mov                 dword ptr [ebx], eax
            //   e8????????           |                     
            //   8d4508               | lea                 eax, [ebp + 8]
            //   50                   | push                eax
            //   897d08               | mov                 dword ptr [ebp + 8], edi

        $sequence_2 = { ff750c ff7508 ff15???????? 5b c9 c20800 58 }
            // n = 7, score = 200
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c20800               | ret                 8
            //   58                   | pop                 eax

        $sequence_3 = { e8???????? 8325????????00 a3???????? c3 ff742404 ff35???????? e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   8325????????00       |                     
            //   a3????????           |                     
            //   c3                   | ret                 
            //   ff742404             | push                dword ptr [esp + 4]
            //   ff35????????         |                     
            //   e8????????           |                     

        $sequence_4 = { ff75f8 2bc6 c6041800 8b45fc 2bc7 c6043000 e8???????? }
            // n = 7, score = 200
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   2bc6                 | sub                 eax, esi
            //   c6041800             | mov                 byte ptr [eax + ebx], 0
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   2bc7                 | sub                 eax, edi
            //   c6043000             | mov                 byte ptr [eax + esi], 0
            //   e8????????           |                     

        $sequence_5 = { ff750c ff7508 e8???????? 8bf0 83c41c 83feff 7514 }
            // n = 7, score = 200
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   83c41c               | add                 esp, 0x1c
            //   83feff               | cmp                 esi, -1
            //   7514                 | jne                 0x16

        $sequence_6 = { 59 59 85c0 741d ff7508 8d85fcfeffff 56 }
            // n = 7, score = 200
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax
            //   741d                 | je                  0x1f
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8d85fcfeffff         | lea                 eax, [ebp - 0x104]
            //   56                   | push                esi

        $sequence_7 = { 83ffff 7510 32db 56 e8???????? 59 5f }
            // n = 7, score = 200
            //   83ffff               | cmp                 edi, -1
            //   7510                 | jne                 0x12
            //   32db                 | xor                 bl, bl
            //   56                   | push                esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   5f                   | pop                 edi

        $sequence_8 = { e8???????? eb04 83650800 8d4df8 e8???????? 8b4508 c9 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   eb04                 | jmp                 6
            //   83650800             | and                 dword ptr [ebp + 8], 0
            //   8d4df8               | lea                 ecx, [ebp - 8]
            //   e8????????           |                     
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   c9                   | leave               

        $sequence_9 = { c645f830 c645f930 c645fa33 c645fb20 c645fc52 }
            // n = 5, score = 200
            //   c645f830             | mov                 byte ptr [ebp - 8], 0x30
            //   c645f930             | mov                 byte ptr [ebp - 7], 0x30
            //   c645fa33             | mov                 byte ptr [ebp - 6], 0x33
            //   c645fb20             | mov                 byte ptr [ebp - 5], 0x20
            //   c645fc52             | mov                 byte ptr [ebp - 4], 0x52

    condition:
        7 of them and filesize < 491520
}