rule win_zebrocy_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.zebrocy"
        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 = { e8???????? 83c40c eb07 8b16 895508 891e }
            // n = 6, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   eb07                 | jmp                 9
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   895508               | mov                 dword ptr [ebp + 8], edx
            //   891e                 | mov                 dword ptr [esi], ebx

        $sequence_1 = { 8d45b8 8b5598 0fbe1c10 83eb10 8d759c e8???????? }
            // n = 6, score = 100
            //   8d45b8               | lea                 eax, [ebp - 0x48]
            //   8b5598               | mov                 edx, dword ptr [ebp - 0x68]
            //   0fbe1c10             | movsx               ebx, byte ptr [eax + edx]
            //   83eb10               | sub                 ebx, 0x10
            //   8d759c               | lea                 esi, [ebp - 0x64]
            //   e8????????           |                     

        $sequence_2 = { 8bf8 be???????? e8???????? 5f 8bc6 }
            // n = 5, score = 100
            //   8bf8                 | mov                 edi, eax
            //   be????????           |                     
            //   e8????????           |                     
            //   5f                   | pop                 edi
            //   8bc6                 | mov                 eax, esi

        $sequence_3 = { 55 89e5 83ec10 c645ff01 }
            // n = 4, score = 100
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp
            //   83ec10               | sub                 esp, 0x10
            //   c645ff01             | mov                 byte ptr [ebp - 1], 1

        $sequence_4 = { 89f9 83ec1c e8???????? 85f6 }
            // n = 4, score = 100
            //   89f9                 | mov                 ecx, edi
            //   83ec1c               | sub                 esp, 0x1c
            //   e8????????           |                     
            //   85f6                 | test                esi, esi

        $sequence_5 = { 8d3c8b 8b8f6c080000 85c9 894e08 7403 89710c 8b4de0 }
            // n = 7, score = 100
            //   8d3c8b               | lea                 edi, [ebx + ecx*4]
            //   8b8f6c080000         | mov                 ecx, dword ptr [edi + 0x86c]
            //   85c9                 | test                ecx, ecx
            //   894e08               | mov                 dword ptr [esi + 8], ecx
            //   7403                 | je                  5
            //   89710c               | mov                 dword ptr [ecx + 0xc], esi
            //   8b4de0               | mov                 ecx, dword ptr [ebp - 0x20]

        $sequence_6 = { 33db 6a02 68???????? 8d8db0f7ffff 51 }
            // n = 5, score = 100
            //   33db                 | xor                 ebx, ebx
            //   6a02                 | push                2
            //   68????????           |                     
            //   8d8db0f7ffff         | lea                 ecx, [ebp - 0x850]
            //   51                   | push                ecx

        $sequence_7 = { 7f10 ba00000800 89d9 e8???????? 89c7 }
            // n = 5, score = 100
            //   7f10                 | jg                  0x12
            //   ba00000800           | mov                 edx, 0x80000
            //   89d9                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   89c7                 | mov                 edi, eax

        $sequence_8 = { 85c0 0f8585000000 8bf3 8d4e02 8d642400 668b06 }
            // n = 6, score = 100
            //   85c0                 | test                eax, eax
            //   0f8585000000         | jne                 0x8b
            //   8bf3                 | mov                 esi, ebx
            //   8d4e02               | lea                 ecx, [esi + 2]
            //   8d642400             | lea                 esp, [esp]
            //   668b06               | mov                 ax, word ptr [esi]

        $sequence_9 = { e8???????? ba???????? 89c3 e8???????? }
            // n = 4, score = 100
            //   e8????????           |                     
            //   ba????????           |                     
            //   89c3                 | mov                 ebx, eax
            //   e8????????           |                     

        $sequence_10 = { 83c002 99 f7f9 c1e002 8945e4 }
            // n = 5, score = 100
            //   83c002               | add                 eax, 2
            //   99                   | cdq                 
            //   f7f9                 | idiv                ecx
            //   c1e002               | shl                 eax, 2
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax

        $sequence_11 = { e8???????? 83ff17 7403 47 ebdf 84db }
            // n = 6, score = 100
            //   e8????????           |                     
            //   83ff17               | cmp                 edi, 0x17
            //   7403                 | je                  5
            //   47                   | inc                 edi
            //   ebdf                 | jmp                 0xffffffe1
            //   84db                 | test                bl, bl

        $sequence_12 = { 5d c21000 8b4d14 51 56 ff15???????? }
            // n = 6, score = 100
            //   5d                   | pop                 ebp
            //   c21000               | ret                 0x10
            //   8b4d14               | mov                 ecx, dword ptr [ebp + 0x14]
            //   51                   | push                ecx
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_13 = { 7410 89f1 890424 ba???????? e8???????? }
            // n = 5, score = 100
            //   7410                 | je                  0x12
            //   89f1                 | mov                 ecx, esi
            //   890424               | mov                 dword ptr [esp], eax
            //   ba????????           |                     
            //   e8????????           |                     

        $sequence_14 = { b001 e9???????? 57 ff15???????? }
            // n = 4, score = 100
            //   b001                 | mov                 al, 1
            //   e9????????           |                     
            //   57                   | push                edi
            //   ff15????????         |                     

        $sequence_15 = { 8b4508 33c9 3b04cdc0844200 7413 41 83f92d }
            // n = 6, score = 100
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   33c9                 | xor                 ecx, ecx
            //   3b04cdc0844200       | cmp                 eax, dword ptr [ecx*8 + 0x4284c0]
            //   7413                 | je                  0x15
            //   41                   | inc                 ecx
            //   83f92d               | cmp                 ecx, 0x2d

    condition:
        7 of them and filesize < 393216
}