rule win_romcom_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.romcom_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.romcom_rat"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 4c8bf2 4d8903 488907 4d8b13 4d3bd1 0f84ec000000 483b442440 }
            // n = 7, score = 100
            //   4c8bf2               | mov                 ecx, dword ptr [eax + 0x8be70]
            //   4d8903               | inc                 ebx
            //   488907               | mov                 ecx, dword ptr [esp + 0x48]
            //   4d8b13               | dec                 eax
            //   4d3bd1               | lea                 edx, [0x12b01]
            //   0f84ec000000         | mov                 eax, esi
            //   483b442440           | dec                 eax

        $sequence_1 = { 83f801 0f8440ffffff 488b8da0020000 4833cc e8???????? 4c8d9c24b0030000 498b5b38 }
            // n = 7, score = 100
            //   83f801               | mov                 eax, 0x104
            //   0f8440ffffff         | dec                 eax
            //   488b8da0020000       | mov                 edx, ebx
            //   4833cc               | xor                 ecx, ecx
            //   e8????????           |                     
            //   4c8d9c24b0030000     | dec                 eax
            //   498b5b38             | lea                 ebx, [0x4cadb]

        $sequence_2 = { 48895c2408 57 4883ec20 488bd9 488d05341b0600 488901 }
            // n = 6, score = 100
            //   48895c2408           | lea                 ecx, [esp + 0x20]
            //   57                   | jne                 0x1d0
            //   4883ec20             | dec                 eax
            //   488bd9               | lea                 edx, [eax + 0x30]
            //   488d05341b0600       | jmp                 0x1d0
            //   488901               | dec                 eax

        $sequence_3 = { 0f100d???????? 0f114810 488d8de0100000 492bcf 4903cf 443821 75f8 }
            // n = 7, score = 100
            //   0f100d????????       |                     
            //   0f114810             | dec                 eax
            //   488d8de0100000       | mov                 edi, ecx
            //   492bcf               | dec                 eax
            //   4903cf               | lea                 edx, [0x14f5b]
            //   443821               | dec                 eax
            //   75f8                 | sub                 esp, 0xb70

        $sequence_4 = { 0fb6b48213d80600 8bd9 48c1e302 33d2 4c8bc3 8d040e 488d8d44030000 }
            // n = 7, score = 100
            //   0fb6b48213d80600     | test                eax, eax
            //   8bd9                 | je                  0xe86
            //   48c1e302             | dec                 eax
            //   33d2                 | mov                 ecx, dword ptr [ebp + 0x7f]
            //   4c8bc3               | dec                 esp
            //   8d040e               | lea                 eax, [esi + 0x18]
            //   488d8d44030000       | dec                 eax

        $sequence_5 = { 41b801000000 8bd0 498bce e8???????? 4883f801 7405 418bc4 }
            // n = 7, score = 100
            //   41b801000000         | test                eax, eax
            //   8bd0                 | je                  0xa6d
            //   498bce               | dec                 esp
            //   e8????????           |                     
            //   4883f801             | mov                 edi, dword ptr [ebp - 0x51]
            //   7405                 | xor                 edi, edi
            //   418bc4               | dec                 eax

        $sequence_6 = { 8a4118 c3 4053 55 56 57 }
            // n = 6, score = 100
            //   8a4118               | dec                 eax
            //   c3                   | sub                 esp, 0x20
            //   4053                 | dec                 eax
            //   55                   | mov                 ebp, dword ptr [ecx + 0x10]
            //   56                   | dec                 eax
            //   57                   | mov                 ebx, 0xffffffff

        $sequence_7 = { 4883ec20 488d05af930500 488bf9 488901 8bda 488b4918 e8???????? }
            // n = 7, score = 100
            //   4883ec20             | lea                 edx, [esp + 0x20]
            //   488d05af930500       | movdqu              xmmword ptr [esp + 0x20], xmm0
            //   488bf9               | dec                 eax
            //   488901               | lea                 eax, [0x66c15]
            //   8bda                 | dec                 eax
            //   488b4918             | mov                 dword ptr [ebx], eax
            //   e8????????           |                     

        $sequence_8 = { 4c63c0 4c8d0d4ddb0400 4c8d1df6050500 498bd0 418d4802 83f901 761b }
            // n = 7, score = 100
            //   4c63c0               | inc                 ecx
            //   4c8d0d4ddb0400       | mov                 edx, dword ptr [ecx + 0x2c]
            //   4c8d1df6050500       | test                eax, eax
            //   498bd0               | jne                 0x1f30
            //   418d4802             | dec                 eax
            //   83f901               | mov                 ecx, dword ptr [esp + 0x20]
            //   761b                 | nop                 

        $sequence_9 = { 458802 49ffc2 4883ee01 0f8574ffffff 418b7e10 458b8ea8000000 448bc7 }
            // n = 7, score = 100
            //   458802               | dec                 eax
            //   49ffc2               | sub                 esp, 0x20
            //   4883ee01             | jmp                 0x1156
            //   0f8574ffffff         | dec                 eax
            //   418b7e10             | mov                 eax, dword ptr [ebx]
            //   458b8ea8000000       | dec                 eax
            //   448bc7               | lea                 ecx, [0x424bd]

    condition:
        7 of them and filesize < 1211392
}