rule win_contopee_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 81c404010000 c3 81ec04010000 53 56 8bb42418010000 57 }
            // n = 7, score = 100
            //   81c404010000         | add                 esp, 0x104
            //   c3                   | ret                 
            //   81ec04010000         | sub                 esp, 0x104
            //   53                   | push                ebx
            //   56                   | push                esi
            //   8bb42418010000       | mov                 esi, dword ptr [esp + 0x118]
            //   57                   | push                edi

        $sequence_1 = { 8d4c2434 57 51 ffd3 83c408 85c0 }
            // n = 6, score = 100
            //   8d4c2434             | lea                 ecx, [esp + 0x34]
            //   57                   | push                edi
            //   51                   | push                ecx
            //   ffd3                 | call                ebx
            //   83c408               | add                 esp, 8
            //   85c0                 | test                eax, eax

        $sequence_2 = { 85db 0f8486000000 6804010000 55 6a00 53 ff15???????? }
            // n = 7, score = 100
            //   85db                 | test                ebx, ebx
            //   0f8486000000         | je                  0x8c
            //   6804010000           | push                0x104
            //   55                   | push                ebp
            //   6a00                 | push                0
            //   53                   | push                ebx
            //   ff15????????         |                     

        $sequence_3 = { 50 ffd5 83c410 8d4c2410 8d942460020000 51 52 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   ffd5                 | call                ebp
            //   83c410               | add                 esp, 0x10
            //   8d4c2410             | lea                 ecx, [esp + 0x10]
            //   8d942460020000       | lea                 edx, [esp + 0x260]
            //   51                   | push                ecx
            //   52                   | push                edx

        $sequence_4 = { 8d0480 6a00 8d0c80 8a842428010000 c1e103 84c0 894c2410 }
            // n = 7, score = 100
            //   8d0480               | lea                 eax, [eax + eax*4]
            //   6a00                 | push                0
            //   8d0c80               | lea                 ecx, [eax + eax*4]
            //   8a842428010000       | mov                 al, byte ptr [esp + 0x128]
            //   c1e103               | shl                 ecx, 3
            //   84c0                 | test                al, al
            //   894c2410             | mov                 dword ptr [esp + 0x10], ecx

        $sequence_5 = { 56 68???????? 6a00 894e18 895e20 6a00 897e14 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   68????????           |                     
            //   6a00                 | push                0
            //   894e18               | mov                 dword ptr [esi + 0x18], ecx
            //   895e20               | mov                 dword ptr [esi + 0x20], ebx
            //   6a00                 | push                0
            //   897e14               | mov                 dword ptr [esi + 0x14], edi

        $sequence_6 = { 33d2 8ad5 894c2418 8a44241a 83c604 8b1c9530f20010 8bd1 }
            // n = 7, score = 100
            //   33d2                 | xor                 edx, edx
            //   8ad5                 | mov                 dl, ch
            //   894c2418             | mov                 dword ptr [esp + 0x18], ecx
            //   8a44241a             | mov                 al, byte ptr [esp + 0x1a]
            //   83c604               | add                 esi, 4
            //   8b1c9530f20010       | mov                 ebx, dword ptr [edx*4 + 0x1000f230]
            //   8bd1                 | mov                 edx, ecx

        $sequence_7 = { ffd7 83c418 8d8c2450020000 6804010000 }
            // n = 4, score = 100
            //   ffd7                 | call                edi
            //   83c418               | add                 esp, 0x18
            //   8d8c2450020000       | lea                 ecx, [esp + 0x250]
            //   6804010000           | push                0x104

        $sequence_8 = { 81c590030000 f3a4 8dbb54020000 83c9ff f2ae }
            // n = 5, score = 100
            //   81c590030000         | add                 ebp, 0x390
            //   f3a4                 | rep movsb           byte ptr es:[edi], byte ptr [esi]
            //   8dbb54020000         | lea                 edi, [ebx + 0x254]
            //   83c9ff               | or                  ecx, 0xffffffff
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]

        $sequence_9 = { 52 8b16 8d4c242c 50 51 52 }
            // n = 6, score = 100
            //   52                   | push                edx
            //   8b16                 | mov                 edx, dword ptr [esi]
            //   8d4c242c             | lea                 ecx, [esp + 0x2c]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   52                   | push                edx

    condition:
        7 of them and filesize < 180224
}