rule win_wm_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.wm_rat."
        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.wm_rat"
        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 = { 6a00 ffd6 8d942490020000 52 6802010000 ff15???????? 85c0 }
            // n = 7, score = 100
            //   6a00                 | push                0
            //   ffd6                 | call                esi
            //   8d942490020000       | lea                 edx, [esp + 0x290]
            //   52                   | push                edx
            //   6802010000           | push                0x102
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax

        $sequence_1 = { 8db4247c0d0000 e8???????? 83c41c 84c0 0f8489000000 83bc24780d000010 8b8424640d0000 }
            // n = 7, score = 100
            //   8db4247c0d0000       | lea                 esi, [esp + 0xd7c]
            //   e8????????           |                     
            //   83c41c               | add                 esp, 0x1c
            //   84c0                 | test                al, al
            //   0f8489000000         | je                  0x8f
            //   83bc24780d000010     | cmp                 dword ptr [esp + 0xd78], 0x10
            //   8b8424640d0000       | mov                 eax, dword ptr [esp + 0xd64]

        $sequence_2 = { 50 8d84242c050000 898c242c050000 e8???????? 8d542418 c684247c31020028 8b8c2424050000 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d84242c050000       | lea                 eax, [esp + 0x52c]
            //   898c242c050000       | mov                 dword ptr [esp + 0x52c], ecx
            //   e8????????           |                     
            //   8d542418             | lea                 edx, [esp + 0x18]
            //   c684247c31020028     | mov                 byte ptr [esp + 0x2317c], 0x28
            //   8b8c2424050000       | mov                 ecx, dword ptr [esp + 0x524]

        $sequence_3 = { 51 dd15???????? e8???????? 8b35???????? 50 ffd6 83c40c }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   dd15????????         |                     
            //   e8????????           |                     
            //   8b35????????         |                     
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   83c40c               | add                 esp, 0xc

        $sequence_4 = { 8d8c247c010000 ff15???????? 8d942494010000 52 8d8c247c010000 ff15???????? }
            // n = 6, score = 100
            //   8d8c247c010000       | lea                 ecx, [esp + 0x17c]
            //   ff15????????         |                     
            //   8d942494010000       | lea                 edx, [esp + 0x194]
            //   52                   | push                edx
            //   8d8c247c010000       | lea                 ecx, [esp + 0x17c]
            //   ff15????????         |                     

        $sequence_5 = { 8944242c 89442414 a1???????? c744240c00000000 c744241801000000 c744241c06000000 7305 }
            // n = 7, score = 100
            //   8944242c             | mov                 dword ptr [esp + 0x2c], eax
            //   89442414             | mov                 dword ptr [esp + 0x14], eax
            //   a1????????           |                     
            //   c744240c00000000     | mov                 dword ptr [esp + 0xc], 0
            //   c744241801000000     | mov                 dword ptr [esp + 0x18], 1
            //   c744241c06000000     | mov                 dword ptr [esp + 0x1c], 6
            //   7305                 | jae                 7

        $sequence_6 = { bf10000000 393d???????? 7305 be???????? 6a00 6800040000 }
            // n = 6, score = 100
            //   bf10000000           | mov                 edi, 0x10
            //   393d????????         |                     
            //   7305                 | jae                 7
            //   be????????           |                     
            //   6a00                 | push                0
            //   6800040000           | push                0x400

        $sequence_7 = { 8d8c24f00d0000 ff15???????? 6a1a 83ec1c 8bd4 c784249c31020046000000 89642454 }
            // n = 7, score = 100
            //   8d8c24f00d0000       | lea                 ecx, [esp + 0xdf0]
            //   ff15????????         |                     
            //   6a1a                 | push                0x1a
            //   83ec1c               | sub                 esp, 0x1c
            //   8bd4                 | mov                 edx, esp
            //   c784249c31020046000000     | mov    dword ptr [esp + 0x2319c], 0x46
            //   89642454             | mov                 dword ptr [esp + 0x54], esp

        $sequence_8 = { a3???????? ff15???????? 85c0 7427 8b0d???????? 51 }
            // n = 6, score = 100
            //   a3????????           |                     
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7427                 | je                  0x29
            //   8b0d????????         |                     
            //   51                   | push                ecx

        $sequence_9 = { 83c420 8d480c 83caff f00fc111 4a 85d2 }
            // n = 6, score = 100
            //   83c420               | add                 esp, 0x20
            //   8d480c               | lea                 ecx, [eax + 0xc]
            //   83caff               | or                  edx, 0xffffffff
            //   f00fc111             | lock xadd           dword ptr [ecx], edx
            //   4a                   | dec                 edx
            //   85d2                 | test                edx, edx

    condition:
        7 of them and filesize < 258048
}