rule win_credraptor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.credraptor."
        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.credraptor"
        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 = { 8d5508 52 8bf7 e8???????? 8945fc 8d45f8 50 }
            // n = 7, score = 100
            //   8d5508               | lea                 edx, [ebp + 8]
            //   52                   | push                edx
            //   8bf7                 | mov                 esi, edi
            //   e8????????           |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax

        $sequence_1 = { 85c9 7434 8b4620 8d1480 c64491ef20 eb27 8b45e4 }
            // n = 7, score = 100
            //   85c9                 | test                ecx, ecx
            //   7434                 | je                  0x36
            //   8b4620               | mov                 eax, dword ptr [esi + 0x20]
            //   8d1480               | lea                 edx, [eax + eax*4]
            //   c64491ef20           | mov                 byte ptr [ecx + edx*4 - 0x11], 0x20
            //   eb27                 | jmp                 0x29
            //   8b45e4               | mov                 eax, dword ptr [ebp - 0x1c]

        $sequence_2 = { ddda ddd9 dc05???????? e8???????? 8945f8 8955fc df6df8 }
            // n = 7, score = 100
            //   ddda                 | fstp                st(2)
            //   ddd9                 | fstp                st(1)
            //   dc05????????         |                     
            //   e8????????           |                     
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   8955fc               | mov                 dword ptr [ebp - 4], edx
            //   df6df8               | fild                qword ptr [ebp - 8]

        $sequence_3 = { f736 eb02 33d2 8b4508 53 50 8bc6 }
            // n = 7, score = 100
            //   f736                 | div                 dword ptr [esi]
            //   eb02                 | jmp                 4
            //   33d2                 | xor                 edx, edx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   8bc6                 | mov                 eax, esi

        $sequence_4 = { 8d7730 895e0c eb05 be???????? 8b4d08 8b4510 8b550c }
            // n = 7, score = 100
            //   8d7730               | lea                 esi, [edi + 0x30]
            //   895e0c               | mov                 dword ptr [esi + 0xc], ebx
            //   eb05                 | jmp                 7
            //   be????????           |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]

        $sequence_5 = { e8???????? 837d8c00 742f 837d9000 b8???????? 7f05 b8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   837d8c00             | cmp                 dword ptr [ebp - 0x74], 0
            //   742f                 | je                  0x31
            //   837d9000             | cmp                 dword ptr [ebp - 0x70], 0
            //   b8????????           |                     
            //   7f05                 | jg                  7
            //   b8????????           |                     

        $sequence_6 = { c745f001000000 8b5f04 8b4054 03ca 894df8 8b4f20 8d1489 }
            // n = 7, score = 100
            //   c745f001000000       | mov                 dword ptr [ebp - 0x10], 1
            //   8b5f04               | mov                 ebx, dword ptr [edi + 4]
            //   8b4054               | mov                 eax, dword ptr [eax + 0x54]
            //   03ca                 | add                 ecx, edx
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   8b4f20               | mov                 ecx, dword ptr [edi + 0x20]
            //   8d1489               | lea                 edx, [ecx + ecx*4]

        $sequence_7 = { 0f8e7f000000 90 8bf3 83fb02 7d03 83f601 8b45f0 }
            // n = 7, score = 100
            //   0f8e7f000000         | jle                 0x85
            //   90                   | nop                 
            //   8bf3                 | mov                 esi, ebx
            //   83fb02               | cmp                 ebx, 2
            //   7d03                 | jge                 5
            //   83f601               | xor                 esi, 1
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_8 = { bbfe010000 e8???????? 83c40c eb46 8d9560ffffff 52 6a04 }
            // n = 7, score = 100
            //   bbfe010000           | mov                 ebx, 0x1fe
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   eb46                 | jmp                 0x48
            //   8d9560ffffff         | lea                 edx, [ebp - 0xa0]
            //   52                   | push                edx
            //   6a04                 | push                4

        $sequence_9 = { e8???????? 50 53 8d45bc 50 8bce e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   50                   | push                eax
            //   53                   | push                ebx
            //   8d45bc               | lea                 eax, [ebp - 0x44]
            //   50                   | push                eax
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     

    condition:
        7 of them and filesize < 1728512
}