rule win_rincux_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.rincux."
        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.rincux"
        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 = { 85c0 7508 8b4608 5f 5e 5d 5b }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   7508                 | jne                 0xa
            //   8b4608               | mov                 eax, dword ptr [esi + 8]
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx

        $sequence_1 = { c644242469 c644242b6f c644242c75 c644242e74 c644243055 88542432 c644243372 }
            // n = 7, score = 200
            //   c644242469           | mov                 byte ptr [esp + 0x24], 0x69
            //   c644242b6f           | mov                 byte ptr [esp + 0x2b], 0x6f
            //   c644242c75           | mov                 byte ptr [esp + 0x2c], 0x75
            //   c644242e74           | mov                 byte ptr [esp + 0x2e], 0x74
            //   c644243055           | mov                 byte ptr [esp + 0x30], 0x55
            //   88542432             | mov                 byte ptr [esp + 0x32], dl
            //   c644243372           | mov                 byte ptr [esp + 0x33], 0x72

        $sequence_2 = { 83c40c 85c0 7408 c74424182c700210 53 ffd5 8b542410 }
            // n = 7, score = 200
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   7408                 | je                  0xa
            //   c74424182c700210     | mov                 dword ptr [esp + 0x18], 0x1002702c
            //   53                   | push                ebx
            //   ffd5                 | call                ebp
            //   8b542410             | mov                 edx, dword ptr [esp + 0x10]

        $sequence_3 = { c78560f9ffff9c000000 50 ff15???????? 8b8564f9ffff 83f805 7568 8b8568f9ffff }
            // n = 7, score = 200
            //   c78560f9ffff9c000000     | mov    dword ptr [ebp - 0x6a0], 0x9c
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b8564f9ffff         | mov                 eax, dword ptr [ebp - 0x69c]
            //   83f805               | cmp                 eax, 5
            //   7568                 | jne                 0x6a
            //   8b8568f9ffff         | mov                 eax, dword ptr [ebp - 0x698]

        $sequence_4 = { c64424326e c644243353 c644243630 c64424375c c644243965 c644243a66 c644243c75 }
            // n = 7, score = 200
            //   c64424326e           | mov                 byte ptr [esp + 0x32], 0x6e
            //   c644243353           | mov                 byte ptr [esp + 0x33], 0x53
            //   c644243630           | mov                 byte ptr [esp + 0x36], 0x30
            //   c64424375c           | mov                 byte ptr [esp + 0x37], 0x5c
            //   c644243965           | mov                 byte ptr [esp + 0x39], 0x65
            //   c644243a66           | mov                 byte ptr [esp + 0x3a], 0x66
            //   c644243c75           | mov                 byte ptr [esp + 0x3c], 0x75

        $sequence_5 = { 50 68???????? 51 ffd6 8b15???????? 83c40c 8b049508a50210 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   68????????           |                     
            //   51                   | push                ecx
            //   ffd6                 | call                esi
            //   8b15????????         |                     
            //   83c40c               | add                 esp, 0xc
            //   8b049508a50210       | mov                 eax, dword ptr [edx*4 + 0x1002a508]

        $sequence_6 = { 8b542410 c1ea02 89542410 83ed02 e9???????? c1ea02 c70310000000 }
            // n = 7, score = 200
            //   8b542410             | mov                 edx, dword ptr [esp + 0x10]
            //   c1ea02               | shr                 edx, 2
            //   89542410             | mov                 dword ptr [esp + 0x10], edx
            //   83ed02               | sub                 ebp, 2
            //   e9????????           |                     
            //   c1ea02               | shr                 edx, 2
            //   c70310000000         | mov                 dword ptr [ebx], 0x10

        $sequence_7 = { 81c424010000 c3 8b942430010000 8d442404 8d4c2408 50 }
            // n = 6, score = 200
            //   81c424010000         | add                 esp, 0x124
            //   c3                   | ret                 
            //   8b942430010000       | mov                 edx, dword ptr [esp + 0x130]
            //   8d442404             | lea                 eax, [esp + 4]
            //   8d4c2408             | lea                 ecx, [esp + 8]
            //   50                   | push                eax

        $sequence_8 = { 68???????? 68???????? ff15???????? 8b35???????? 33ff 68???????? }
            // n = 6, score = 200
            //   68????????           |                     
            //   68????????           |                     
            //   ff15????????         |                     
            //   8b35????????         |                     
            //   33ff                 | xor                 edi, edi
            //   68????????           |                     

        $sequence_9 = { 57 8b3d???????? 750f ffd7 56 ffd7 68???????? }
            // n = 7, score = 200
            //   57                   | push                edi
            //   8b3d????????         |                     
            //   750f                 | jne                 0x11
            //   ffd7                 | call                edi
            //   56                   | push                esi
            //   ffd7                 | call                edi
            //   68????????           |                     

    condition:
        7 of them and filesize < 392192
}