rule win_op_blockbuster_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.op_blockbuster."
        info = "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.op_blockbuster"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { 8a08 80f920 7505 83c021 eb05 }
            // n = 5, score = 800
            //   8a08                 | dec                 eax
            //   80f920               | lea                 eax, [esp + 0x190]
            //   7505                 | dec                 esp
            //   83c021               | lea                 eax, [esp + 0x60]
            //   eb05                 | mov                 dword ptr [esp + 0x20], 1

        $sequence_1 = { 56 57 683c400000 6a40 }
            // n = 4, score = 800
            //   56                   | rep stosd           dword ptr es:[edi], eax
            //   57                   | stosw               word ptr es:[edi], ax
            //   683c400000           | stosb               byte ptr es:[edi], al
            //   6a40                 | pop                 edi

        $sequence_2 = { f3ab 66ab aa 5f 85f6 }
            // n = 5, score = 800
            //   f3ab                 | lea                 eax, [esp + 0x40]
            //   66ab                 | dec                 esp
            //   aa                   | lea                 ecx, [esp + 0x40]
            //   5f                   | dec                 eax
            //   85f6                 | mov                 dword ptr [esp + 0x28], eax

        $sequence_3 = { ff15???????? 6808400000 6a40 ff15???????? }
            // n = 4, score = 800
            //   ff15????????         |                     
            //   6808400000           | mov                 eax, 2
            //   6a40                 | dec                 eax
            //   ff15????????         |                     

        $sequence_4 = { 6a00 e8???????? 85c0 7407 83f802 }
            // n = 5, score = 800
            //   6a00                 | push                edi
            //   e8????????           |                     
            //   85c0                 | push                0x403c
            //   7407                 | push                0x40
            //   83f802               | push                0x4000

        $sequence_5 = { e8???????? 33c9 5f 85c0 0f9fc1 }
            // n = 5, score = 800
            //   e8????????           |                     
            //   33c9                 | mov                 ecx, dword ptr [ecx + 0x7c]
            //   5f                   | test                ecx, ecx
            //   85c0                 | je                  9
            //   0f9fc1               | push                ecx

        $sequence_6 = { e8???????? 6800400000 6a00 ff15???????? }
            // n = 4, score = 800
            //   e8????????           |                     
            //   6800400000           | add                 eax, 0x21
            //   6a00                 | jmp                 0xc
            //   ff15????????         |                     

        $sequence_7 = { c701???????? 8b497c 85c9 7407 51 }
            // n = 5, score = 800
            //   c701????????         |                     
            //   8b497c               | test                eax, eax
            //   85c9                 | je                  0x188
            //   7407                 | mov                 edx, dword ptr [esp + 0x44]
            //   51                   | dec                 ecx

        $sequence_8 = { 56 50 8d45fc 6a04 50 57 ff15???????? }
            // n = 7, score = 700
            //   56                   | stosw               word ptr es:[edi], ax
            //   50                   | stosb               byte ptr es:[edi], al
            //   8d45fc               | pop                 edi
            //   6a04                 | test                esi, esi
            //   50                   | pop                 esi
            //   57                   | push                esi
            //   ff15????????         |                     

        $sequence_9 = { 68???????? ff15???????? 85c0 7412 68???????? 50 e8???????? }
            // n = 7, score = 700
            //   68????????           |                     
            //   ff15????????         |                     
            //   85c0                 | pop                 ecx
            //   7412                 | push                esi
            //   68????????           |                     
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_10 = { 68???????? 56 ff15???????? 68???????? 56 a3???????? e8???????? }
            // n = 7, score = 700
            //   68????????           |                     
            //   56                   | push                eax
            //   ff15????????         |                     
            //   68????????           |                     
            //   56                   | pop                 ecx
            //   a3????????           |                     
            //   e8????????           |                     

        $sequence_11 = { 3c70 7f04 0409 eb06 3c72 }
            // n = 5, score = 500
            //   3c70                 | cmp                 al, 0x70
            //   7f04                 | jg                  6
            //   0409                 | add                 al, 9
            //   eb06                 | jmp                 8
            //   3c72                 | cmp                 al, 0x72

        $sequence_12 = { 3c69 7c08 3c70 7f04 }
            // n = 4, score = 500
            //   3c69                 | cmp                 al, 0x69
            //   7c08                 | jl                  0xa
            //   3c70                 | cmp                 al, 0x70
            //   7f04                 | jg                  6

        $sequence_13 = { 488d442440 4c8d4c2440 4889442428 488d842490010000 4c8d442460 }
            // n = 5, score = 300
            //   488d442440           | inc                 ecx
            //   4c8d4c2440           | inc                 ebp
            //   4889442428           | xor                 ecx, ecx
            //   488d842490010000     | mov                 dword ptr [esp + 0x40], 1
            //   4c8d442460           | mov                 dword ptr [esp + 0x34], ebx

        $sequence_14 = { 488b4c2470 33c0 48894580 48894588 488d442478 4889442450 488d4590 }
            // n = 7, score = 300
            //   488b4c2470           | test                al, al
            //   33c0                 | jne                 0xffffffe9
            //   48894580             | cmp                 byte ptr [edi], 0x3a
            //   48894588             | jne                 0x42
            //   488d442478           | dec                 eax
            //   4889442450           | mov                 ecx, dword ptr [esp + 0x70]
            //   488d4590             | xor                 eax, eax

        $sequence_15 = { 8bc6 5f 5e c3 33c0 6a00 }
            // n = 6, score = 300
            //   8bc6                 | call                dword ptr [ecx + 0x14]
            //   5f                   | test                eax, eax
            //   5e                   | jge                 0xb
            //   c3                   | xor                 eax, eax
            //   33c0                 | jmp                 0x3a
            //   6a00                 | call                dword ptr [ecx + 0x14]

        $sequence_16 = { 6a00 ff15???????? 8bf8 85ff 7504 5f }
            // n = 6, score = 300
            //   6a00                 | jne                 0x49
            //   ff15????????         |                     
            //   8bf8                 | mov                 eax, esi
            //   85ff                 | pop                 edi
            //   7504                 | pop                 esi
            //   5f                   | ret                 

        $sequence_17 = { 84c0 75e7 803f3a 753d }
            // n = 4, score = 300
            //   84c0                 | inc                 ebp
            //   75e7                 | xor                 ecx, ecx
            //   803f3a               | dec                 eax
            //   753d                 | mov                 edi, ecx

        $sequence_18 = { 57 4883ec50 488bc2 4533c9 488bf9 }
            // n = 5, score = 300
            //   57                   | push                edi
            //   4883ec50             | dec                 eax
            //   488bc2               | sub                 esp, 0x50
            //   4533c9               | dec                 eax
            //   488bf9               | mov                 eax, edx

        $sequence_19 = { 33d2 ffc1 4533c9 c744244001000000 895c2434 ff15???????? }
            // n = 6, score = 300
            //   33d2                 | dec                 eax
            //   ffc1                 | mov                 dword ptr [ebp - 0x80], eax
            //   4533c9               | dec                 eax
            //   c744244001000000     | mov                 dword ptr [ebp - 0x78], eax
            //   895c2434             | dec                 eax
            //   ff15????????         |                     

        $sequence_20 = { ebf8 53 33db 391d???????? 56 57 }
            // n = 6, score = 300
            //   ebf8                 | test                eax, eax
            //   53                   | jge                 8
            //   33db                 | xor                 eax, eax
            //   391d????????         |                     
            //   56                   | jmp                 0x37
            //   57                   | mov                 ax, word ptr [ebp - 6]

        $sequence_21 = { 48ffc1 84c0 75ea 803f20 740a b802000000 e9???????? }
            // n = 7, score = 300
            //   48ffc1               | lea                 eax, [esp + 0x78]
            //   84c0                 | dec                 eax
            //   75ea                 | mov                 dword ptr [esp + 0x50], eax
            //   803f20               | dec                 eax
            //   740a                 | lea                 eax, [ebp - 0x70]
            //   b802000000           | xor                 edx, edx
            //   e9????????           |                     

        $sequence_22 = { a3???????? 5e c3 68???????? ff15???????? 85c0 }
            // n = 6, score = 300
            //   a3????????           |                     
            //   5e                   | push                edi
            //   c3                   | push                esi
            //   68????????           |                     
            //   ff15????????         |                     
            //   85c0                 | push                eax

        $sequence_23 = { 8bf0 ff15???????? 85f6 7404 85c0 }
            // n = 5, score = 300
            //   8bf0                 | xor                 eax, eax
            //   ff15????????         |                     
            //   85f6                 | push                0
            //   7404                 | cmp                 dword ptr [esp + 8], eax
            //   85c0                 | jmp                 0xfffffffa

        $sequence_24 = { e8???????? 56 e8???????? 83c414 b801000000 }
            // n = 5, score = 300
            //   e8????????           |                     
            //   56                   | push                ebx
            //   e8????????           |                     
            //   83c414               | xor                 ebx, ebx
            //   b801000000           | push                esi

        $sequence_25 = { c3 56 53 6a01 57 e8???????? }
            // n = 6, score = 300
            //   c3                   | jmp                 0xfffffffa
            //   56                   | push                ebx
            //   53                   | xor                 ebx, ebx
            //   6a01                 | push                esi
            //   57                   | push                edi
            //   e8????????           |                     

        $sequence_26 = { c1f806 6bc930 8b0485d8974400 80640828fe ff15???????? }
            // n = 5, score = 200
            //   c1f806               | push                0
            //   6bc930               | mov                 edi, eax
            //   8b0485d8974400       | test                edi, edi
            //   80640828fe           | jne                 0xa
            //   ff15????????         |                     

        $sequence_27 = { 7831 8b1cc5ac324400 6a55 53 e8???????? 8bf8 }
            // n = 6, score = 200
            //   7831                 | push                edi
            //   8b1cc5ac324400       | push                esi
            //   6a55                 | add                 esp, 0x14
            //   53                   | ret                 
            //   e8????????           |                     
            //   8bf8                 | push                esi

        $sequence_28 = { 83c40c c3 a1???????? 85c0 7402 ffd0 68???????? }
            // n = 7, score = 200
            //   83c40c               | pop                 edi
            //   c3                   | pop                 esi
            //   a1????????           |                     
            //   85c0                 | ret                 
            //   7402                 | push                esi
            //   ffd0                 | push                ebx
            //   68????????           |                     

        $sequence_29 = { 6a40 ff74240c ff74240c e8???????? 83c40c c3 a1???????? }
            // n = 7, score = 200
            //   6a40                 | push                1
            //   ff74240c             | push                edi
            //   ff74240c             | push                esi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0x14
            //   c3                   | mov                 eax, 1
            //   a1????????           |                     

        $sequence_30 = { 8a06 46 8b0c8dd8974400 8844392b 83fa03 7511 }
            // n = 6, score = 200
            //   8a06                 | push                ebx
            //   46                   | push                1
            //   8b0c8dd8974400       | push                edi
            //   8844392b             | mov                 esi, eax
            //   83fa03               | test                esi, esi
            //   7511                 | je                  8

        $sequence_31 = { 894de0 8bc6 83e03f 6bd030 8955dc 8b048dd8974400 }
            // n = 6, score = 200
            //   894de0               | pop                 edi
            //   8bc6                 | push                esi
            //   83e03f               | push                esi
            //   6bd030               | add                 esp, 0x38
            //   8955dc               | push                ebx
            //   8b048dd8974400       | push                1

        $sequence_32 = { 50 ff5114 85c0 7d04 33c0 eb2f }
            // n = 6, score = 100
            //   50                   | push                eax
            //   ff5114               | pop                 esi
            //   85c0                 | ret                 
            //   7d04                 | test                eax, eax
            //   33c0                 | pop                 esi
            //   eb2f                 | ret                 

        $sequence_33 = { 668b45fa 66894612 668b85f8feffff 66894614 58 5f }
            // n = 6, score = 100
            //   668b45fa             | je                  0x17
            //   66894612             | pop                 esi
            //   668b85f8feffff       | ret                 
            //   66894614             | test                eax, eax
            //   58                   | je                  0x17
            //   5f                   | jne                 0x43

        $sequence_34 = { 7541 57 b9ff010000 33c0 8dbdfef7ffff 66899dfcf7ffff }
            // n = 6, score = 100
            //   7541                 | lea                 eax, [ebp - 4]
            //   57                   | push                4
            //   b9ff010000           | push                eax
            //   33c0                 | push                edi
            //   8dbdfef7ffff         | test                eax, eax
            //   66899dfcf7ffff       | je                  0x14

    condition:
        7 of them and filesize < 74309632
}