rule win_romcom_rat_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        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 = "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 = { 4883ec20 488b4130 488bea ba01000000 418bf0 488bd9 488b4940 }
            // n = 7, score = 100
            //   4883ec20             | inc                 edx
            //   488b4130             | mov                 cl, byte ptr [ecx + ecx + 0x6acb0]
            //   488bea               | dec                 eax
            //   ba01000000           | sub                 edx, eax
            //   418bf0               | dec                 ecx
            //   488bd9               | mov                 edx, dword ptr [ecx + 8]
            //   488b4940             | movzx               ecx, byte ptr [edx]

        $sequence_1 = { 48890d???????? 488d05be820300 488d0de7840300 488905???????? 48890d???????? e8???????? 4c8d0d1db10300 }
            // n = 7, score = 100
            //   48890d????????       |                     
            //   488d05be820300       | lea                 edx, [ebp - 0x49]
            //   488d0de7840300       | dec                 esp
            //   488905????????       |                     
            //   48890d????????       |                     
            //   e8????????           |                     
            //   4c8d0d1db10300       | cmovae              esi, dword ptr [ebp - 0x11]

        $sequence_2 = { 4084f6 488d0de4370700 7504 488b4f10 4c8d442420 33d2 e8???????? }
            // n = 7, score = 100
            //   4084f6               | lea                 eax, [0x6fef9]
            //   488d0de4370700       | dec                 eax
            //   7504                 | mov                 edx, ebx
            //   488b4f10             | dec                 eax
            //   4c8d442420           | lea                 ecx, [0x89e36]
            //   33d2                 | dec                 eax
            //   e8????????           |                     

        $sequence_3 = { 488b04c2 488d0cc9 488d14c8 eb07 488d159cc00300 f6423820 74ba }
            // n = 7, score = 100
            //   488b04c2             | mov                 dword ptr [esp + 0x28], eax
            //   488d0cc9             | dec                 eax
            //   488d14c8             | lea                 edx, [0x1bba5]
            //   eb07                 | inc                 ebp
            //   488d159cc00300       | xor                 eax, eax
            //   f6423820             | dec                 esp
            //   74ba                 | lea                 ecx, [esp + 0x40]

        $sequence_4 = { 0f8798020000 e8???????? 4084f6 741d 488d5530 488bcf ff15???????? }
            // n = 7, score = 100
            //   0f8798020000         | je                  0xa90
            //   e8????????           |                     
            //   4084f6               | dec                 eax
            //   741d                 | lea                 edx, [ebp + 0xf60]
            //   488d5530             | inc                 ebp
            //   488bcf               | xor                 ecx, ecx
            //   ff15????????         |                     

        $sequence_5 = { 4533c0 458bc8 473a941958da0600 740a 473a941960da0600 751b 488b02 }
            // n = 7, score = 100
            //   4533c0               | mov                 dword ptr [esp + 0x20], eax
            //   458bc8               | dec                 eax
            //   473a941958da0600     | lea                 ecx, [ebp + 0x60]
            //   740a                 | jmp                 0x1cdb
            //   473a941960da0600     | dec                 eax
            //   751b                 | lea                 ecx, [ebp + 0x60]
            //   488b02               | dec                 eax

        $sequence_6 = { 4883c0f8 4883f81f 0f8758020000 e8???????? 488d542430 84db 0f84c5010000 }
            // n = 7, score = 100
            //   4883c0f8             | mov                 byte ptr [eax + ecx + 1], bh
            //   4883f81f             | jmp                 0xa4c
            //   0f8758020000         | inc                 esp
            //   e8????????           |                     
            //   488d542430           | mov                 al, byte ptr [esp + 0x20]
            //   84db                 | dec                 ecx
            //   0f84c5010000         | cmp                 esi, esi

        $sequence_7 = { 751f 41b905000000 4c8d05c8e00100 488bc8 418d510b e8???????? 85c0 }
            // n = 7, score = 100
            //   751f                 | dec                 ecx
            //   41b905000000         | add                 ecx, edi
            //   4c8d05c8e00100       | inc                 esp
            //   488bc8               | cmp                 byte ptr [ecx], ah
            //   418d510b             | jne                 0x1efb
            //   e8????????           |                     
            //   85c0                 | movsd               qword ptr [ecx], xmm0

        $sequence_8 = { 85c0 7fb1 448b642460 4585e4 0f84e3feffff 418bff c1e70c }
            // n = 7, score = 100
            //   85c0                 | dec                 eax
            //   7fb1                 | mov                 ebx, dword ptr [esp + 0x50]
            //   448b642460           | jb                  0x4b4
            //   4585e4               | dec                 eax
            //   0f84e3feffff         | inc                 edx
            //   418bff               | dec                 eax
            //   c1e70c               | mov                 ecx, dword ptr [ebp - 0x31]

        $sequence_9 = { 488bc8 e8???????? eb08 488b0f e8???????? 488b07 395814 }
            // n = 7, score = 100
            //   488bc8               | dec                 eax
            //   e8????????           |                     
            //   eb08                 | mov                 eax, dword ptr [eax]
            //   488b0f               | dec                 eax
            //   e8????????           |                     
            //   488b07               | mov                 dword ptr [ebp - 0x58], eax
            //   395814               | dec                 eax

    condition:
        7 of them and filesize < 1211392
}