rule win_contopee_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.contopee."
        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.contopee"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 746f 8b3d???????? 6683bc24400200002e 7442 }
            // n = 4, score = 100
            //   746f                 | je                  0x71
            //   8b3d????????         |                     
            //   6683bc24400200002e     | cmp    word ptr [esp + 0x240], 0x2e
            //   7442                 | je                  0x44

        $sequence_1 = { 56 8d4c2414 53 51 e8???????? eb7c 56 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   8d4c2414             | lea                 ecx, [esp + 0x14]
            //   53                   | push                ebx
            //   51                   | push                ecx
            //   e8????????           |                     
            //   eb7c                 | jmp                 0x7e
            //   56                   | push                esi

        $sequence_2 = { 0f8dd2000000 53 53 53 55 ff15???????? 8a443418 }
            // n = 7, score = 100
            //   0f8dd2000000         | jge                 0xd8
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   ff15????????         |                     
            //   8a443418             | mov                 al, byte ptr [esp + esi + 0x18]

        $sequence_3 = { 8d7c242a 6689742428 f3ab 8d8c2430020000 89742410 51 }
            // n = 6, score = 100
            //   8d7c242a             | lea                 edi, [esp + 0x2a]
            //   6689742428           | mov                 word ptr [esp + 0x28], si
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   8d8c2430020000       | lea                 ecx, [esp + 0x230]
            //   89742410             | mov                 dword ptr [esp + 0x10], esi
            //   51                   | push                ecx

        $sequence_4 = { 53 ff15???????? 8b54242c 52 ff15???????? 8b4610 33ff }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   ff15????????         |                     
            //   8b54242c             | mov                 edx, dword ptr [esp + 0x2c]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   8b4610               | mov                 eax, dword ptr [esi + 0x10]
            //   33ff                 | xor                 edi, edi

        $sequence_5 = { 3bcb 770a c744241801000000 eb40 6a00 6a00 }
            // n = 6, score = 100
            //   3bcb                 | cmp                 ecx, ebx
            //   770a                 | ja                  0xc
            //   c744241801000000     | mov                 dword ptr [esp + 0x18], 1
            //   eb40                 | jmp                 0x42
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_6 = { 33c0 5f 5e 5b 81c404010000 c3 }
            // n = 6, score = 100
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   81c404010000         | add                 esp, 0x104
            //   c3                   | ret                 

        $sequence_7 = { 8d8c2450020000 6804010000 51 6802100000 }
            // n = 4, score = 100
            //   8d8c2450020000       | lea                 ecx, [esp + 0x250]
            //   6804010000           | push                0x104
            //   51                   | push                ecx
            //   6802100000           | push                0x1002

        $sequence_8 = { 68???????? 51 ff15???????? 8b84243c020000 8d542428 52 50 }
            // n = 7, score = 100
            //   68????????           |                     
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8b84243c020000       | mov                 eax, dword ptr [esp + 0x23c]
            //   8d542428             | lea                 edx, [esp + 0x28]
            //   52                   | push                edx
            //   50                   | push                eax

        $sequence_9 = { e8???????? 89442408 8b44242c 50 8d4c240c 6a18 51 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   89442408             | mov                 dword ptr [esp + 8], eax
            //   8b44242c             | mov                 eax, dword ptr [esp + 0x2c]
            //   50                   | push                eax
            //   8d4c240c             | lea                 ecx, [esp + 0xc]
            //   6a18                 | push                0x18
            //   51                   | push                ecx

    condition:
        7 of them and filesize < 180224
}