rule win_killdisk_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.killdisk"
        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 = { 83ffff 0f84ab000000 57 ff15???????? 8bc3 8d4c2424 897e08 }
            // n = 7, score = 100
            //   83ffff               | cmp                 edi, -1
            //   0f84ab000000         | je                  0xb1
            //   57                   | push                edi
            //   ff15????????         |                     
            //   8bc3                 | mov                 eax, ebx
            //   8d4c2424             | lea                 ecx, [esp + 0x24]
            //   897e08               | mov                 dword ptr [esi + 8], edi

        $sequence_1 = { 8945fc 53 8b1d???????? 56 57 8bf9 33c9 }
            // n = 7, score = 100
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   53                   | push                ebx
            //   8b1d????????         |                     
            //   56                   | push                esi
            //   57                   | push                edi
            //   8bf9                 | mov                 edi, ecx
            //   33c9                 | xor                 ecx, ecx

        $sequence_2 = { 6a00 6a00 8d542418 52 68???????? 6800004006 }
            // n = 6, score = 100
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   8d542418             | lea                 edx, [esp + 0x18]
            //   52                   | push                edx
            //   68????????           |                     
            //   6800004006           | push                0x6400000

        $sequence_3 = { 60 9c 8f442428 882424 881c24 e8???????? d2cd }
            // n = 7, score = 100
            //   60                   | pushal              
            //   9c                   | pushfd              
            //   8f442428             | pop                 dword ptr [esp + 0x28]
            //   882424               | mov                 byte ptr [esp], ah
            //   881c24               | mov                 byte ptr [esp], bl
            //   e8????????           |                     
            //   d2cd                 | ror                 ch, cl

        $sequence_4 = { 5e e8???????? 66ffc6 e8???????? }
            // n = 4, score = 100
            //   5e                   | pop                 esi
            //   e8????????           |                     
            //   66ffc6               | inc                 si
            //   e8????????           |                     

        $sequence_5 = { 662dca11 e8???????? 881438 e8???????? }
            // n = 4, score = 100
            //   662dca11             | sub                 ax, 0x11ca
            //   e8????????           |                     
            //   881438               | mov                 byte ptr [eax + edi], dl
            //   e8????????           |                     

        $sequence_6 = { e8???????? 8d8df8feffff 51 8d95f4fdffff 52 e8???????? }
            // n = 6, score = 100
            //   e8????????           |                     
            //   8d8df8feffff         | lea                 ecx, [ebp - 0x108]
            //   51                   | push                ecx
            //   8d95f4fdffff         | lea                 edx, [ebp - 0x20c]
            //   52                   | push                edx
            //   e8????????           |                     

        $sequence_7 = { 28d8 882424 e9???????? 66894500 66897c240c 882c24 }
            // n = 6, score = 100
            //   28d8                 | sub                 al, bl
            //   882424               | mov                 byte ptr [esp], ah
            //   e9????????           |                     
            //   66894500             | mov                 word ptr [ebp], ax
            //   66897c240c           | mov                 word ptr [esp + 0xc], di
            //   882c24               | mov                 byte ptr [esp], ch

        $sequence_8 = { 8d9dd8fbffff 8bc6 e8???????? 8b4df4 64890d00000000 }
            // n = 5, score = 100
            //   8d9dd8fbffff         | lea                 ebx, [ebp - 0x428]
            //   8bc6                 | mov                 eax, esi
            //   e8????????           |                     
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]
            //   64890d00000000       | mov                 dword ptr fs:[0], ecx

        $sequence_9 = { e8???????? 8bd0 8d642400 668b08 83c002 }
            // n = 5, score = 100
            //   e8????????           |                     
            //   8bd0                 | mov                 edx, eax
            //   8d642400             | lea                 esp, [esp]
            //   668b08               | mov                 cx, word ptr [eax]
            //   83c002               | add                 eax, 2

        $sequence_10 = { 7718 83f908 7205 8b4500 eb02 8bc5 }
            // n = 6, score = 100
            //   7718                 | ja                  0x1a
            //   83f908               | cmp                 ecx, 8
            //   7205                 | jb                  7
            //   8b4500               | mov                 eax, dword ptr [ebp]
            //   eb02                 | jmp                 4
            //   8bc5                 | mov                 eax, ebp

        $sequence_11 = { 898dd8fdffff 8d8dd8fdffff c1e009 51 50 }
            // n = 5, score = 100
            //   898dd8fdffff         | mov                 dword ptr [ebp - 0x228], ecx
            //   8d8dd8fdffff         | lea                 ecx, [ebp - 0x228]
            //   c1e009               | shl                 eax, 9
            //   51                   | push                ecx
            //   50                   | push                eax

        $sequence_12 = { 50 ffd7 85c0 7436 68???????? 8d8de4feffff 51 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   7436                 | je                  0x38
            //   68????????           |                     
            //   8d8de4feffff         | lea                 ecx, [ebp - 0x11c]
            //   51                   | push                ecx

        $sequence_13 = { 8b4da2 8b45aa 8b55a6 8945f0 894de8 }
            // n = 5, score = 100
            //   8b4da2               | mov                 ecx, dword ptr [ebp - 0x5e]
            //   8b45aa               | mov                 eax, dword ptr [ebp - 0x56]
            //   8b55a6               | mov                 edx, dword ptr [ebp - 0x5a]
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   894de8               | mov                 dword ptr [ebp - 0x18], ecx

        $sequence_14 = { 50 e8???????? 8b4dfc 83c404 33cd 5b }
            // n = 6, score = 100
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   83c404               | add                 esp, 4
            //   33cd                 | xor                 ecx, ebp
            //   5b                   | pop                 ebx

        $sequence_15 = { 760a d035???????? d6 d487 }
            // n = 4, score = 100
            //   760a                 | jbe                 0xc
            //   d035????????         |                     
            //   d6                   | salc                
            //   d487                 | aam                 0x87

        $sequence_16 = { 55 53 e8???????? 57 68???????? 8d742438 e8???????? }
            // n = 7, score = 100
            //   55                   | push                ebp
            //   53                   | push                ebx
            //   e8????????           |                     
            //   57                   | push                edi
            //   68????????           |                     
            //   8d742438             | lea                 esi, [esp + 0x38]
            //   e8????????           |                     

        $sequence_17 = { 872d???????? 0fc1c2 89e2 66d3c9 66d3c0 }
            // n = 5, score = 100
            //   872d????????         |                     
            //   0fc1c2               | xadd                edx, eax
            //   89e2                 | mov                 edx, esp
            //   66d3c9               | ror                 cx, cl
            //   66d3c0               | rol                 ax, cl

        $sequence_18 = { 33c0 3bc5 7f2e 7c04 }
            // n = 4, score = 100
            //   33c0                 | xor                 eax, eax
            //   3bc5                 | cmp                 eax, ebp
            //   7f2e                 | jg                  0x30
            //   7c04                 | jl                  6

        $sequence_19 = { e9???????? 46 60 9c 9c 8d642428 }
            // n = 6, score = 100
            //   e9????????           |                     
            //   46                   | inc                 esi
            //   60                   | pushal              
            //   9c                   | pushfd              
            //   9c                   | pushfd              
            //   8d642428             | lea                 esp, [esp + 0x28]

        $sequence_20 = { 894c2430 e9???????? 9c 9c 66894504 57 }
            // n = 6, score = 100
            //   894c2430             | mov                 dword ptr [esp + 0x30], ecx
            //   e9????????           |                     
            //   9c                   | pushfd              
            //   9c                   | pushfd              
            //   66894504             | mov                 word ptr [ebp + 4], ax
            //   57                   | push                edi

        $sequence_21 = { 6a01 56 e8???????? 53 e8???????? 56 }
            // n = 6, score = 100
            //   6a01                 | push                1
            //   56                   | push                esi
            //   e8????????           |                     
            //   53                   | push                ebx
            //   e8????????           |                     
            //   56                   | push                esi

        $sequence_22 = { 51 ff15???????? 85c0 0f8565fdffff ff0d???????? }
            // n = 5, score = 100
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   0f8565fdffff         | jne                 0xfffffd6b
            //   ff0d????????         |                     

        $sequence_23 = { 6a01 50 89442430 89442434 89442438 8944243c ff15???????? }
            // n = 7, score = 100
            //   6a01                 | push                1
            //   50                   | push                eax
            //   89442430             | mov                 dword ptr [esp + 0x30], eax
            //   89442434             | mov                 dword ptr [esp + 0x34], eax
            //   89442438             | mov                 dword ptr [esp + 0x38], eax
            //   8944243c             | mov                 dword ptr [esp + 0x3c], eax
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 10817536
}