rule win_sedll_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.sedll."
        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.sedll"
        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 = { 5d c22400 8bc6 5e 8be5 }
            // n = 5, score = 200
            //   5d                   | pop                 ebp
            //   c22400               | ret                 0x24
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi
            //   8be5                 | mov                 esp, ebp

        $sequence_1 = { 0f8c36ffffff 8b45e8 5f c60600 5e 5b 8be5 }
            // n = 7, score = 200
            //   0f8c36ffffff         | jl                  0xffffff3c
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   5f                   | pop                 edi
            //   c60600               | mov                 byte ptr [esi], 0
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp

        $sequence_2 = { 33f6 89442418 39742410 7e2e 8b3d???????? }
            // n = 5, score = 200
            //   33f6                 | xor                 esi, esi
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   39742410             | cmp                 dword ptr [esp + 0x10], esi
            //   7e2e                 | jle                 0x30
            //   8b3d????????         |                     

        $sequence_3 = { 6aff 53 8b1d???????? 6a00 6a00 }
            // n = 5, score = 200
            //   6aff                 | push                -1
            //   53                   | push                ebx
            //   8b1d????????         |                     
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_4 = { 6a03 6a00 6a01 6800000080 56 ff15???????? 8945fc }
            // n = 7, score = 200
            //   6a03                 | push                3
            //   6a00                 | push                0
            //   6a01                 | push                1
            //   6800000080           | push                0x80000000
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8945fc               | mov                 dword ptr [ebp - 4], eax

        $sequence_5 = { 84db 0f850b010000 3b742414 751b 8d442478 68???????? }
            // n = 6, score = 200
            //   84db                 | test                bl, bl
            //   0f850b010000         | jne                 0x111
            //   3b742414             | cmp                 esi, dword ptr [esp + 0x14]
            //   751b                 | jne                 0x1d
            //   8d442478             | lea                 eax, [esp + 0x78]
            //   68????????           |                     

        $sequence_6 = { 83ee04 73ef 8b4d08 85c9 7416 }
            // n = 5, score = 200
            //   83ee04               | sub                 esi, 4
            //   73ef                 | jae                 0xfffffff1
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   85c9                 | test                ecx, ecx
            //   7416                 | je                  0x18

        $sequence_7 = { 56 ff15???????? 56 8bd8 6a00 53 e8???????? }
            // n = 7, score = 200
            //   56                   | push                esi
            //   ff15????????         |                     
            //   56                   | push                esi
            //   8bd8                 | mov                 ebx, eax
            //   6a00                 | push                0
            //   53                   | push                ebx
            //   e8????????           |                     

        $sequence_8 = { 83ef04 73ef 8b4d08 8b4510 51 8908 8b01 }
            // n = 7, score = 200
            //   83ef04               | sub                 edi, 4
            //   73ef                 | jae                 0xfffffff1
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   51                   | push                ecx
            //   8908                 | mov                 dword ptr [eax], ecx
            //   8b01                 | mov                 eax, dword ptr [ecx]

        $sequence_9 = { 6805010000 ff15???????? ff7514 83c602 8d85f0fdffff 56 }
            // n = 6, score = 200
            //   6805010000           | push                0x105
            //   ff15????????         |                     
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   83c602               | add                 esi, 2
            //   8d85f0fdffff         | lea                 eax, [ebp - 0x210]
            //   56                   | push                esi

    condition:
        7 of them and filesize < 65536
}