rule win_poslurp_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.poslurp."
        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.poslurp"
        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 = { c640f316 c640f417 c640f51a 458bc8 0f1f00 410fb64201 b91f000000 }
            // n = 7, score = 100
            //   c640f316             | dec                 ecx
            //   c640f417             | mov                 esp, ebx
            //   c640f51a             | inc                 ecx
            //   458bc8               | pop                 edi
            //   0f1f00               | mov                 eax, 1
            //   410fb64201           | shl                 eax, cl
            //   b91f000000           | or                  edx, eax

        $sequence_1 = { 4983c004 453bcb 72cf 33c0 488b5c2408 488b7c2410 c3 }
            // n = 7, score = 100
            //   4983c004             | dec                 ecx
            //   453bcb               | lea                 edx, [eax + 8]
            //   72cf                 | dec                 eax
            //   33c0                 | test                eax, 0xfffffffe
            //   488b5c2408           | jbe                 0x58e
            //   488b7c2410           | movzx               eax, word ptr [edx]
            //   c3                   | shr                 ax, 0xc

        $sequence_2 = { 488d542438 66895c2458 e8???????? 4885c0 }
            // n = 4, score = 100
            //   488d542438           | mov                 dword ptr [edx], eax
            //   66895c2458           | dec                 eax
            //   e8????????           |                     
            //   4885c0               | sub                 ecx, 0x22

        $sequence_3 = { 85f6 75cc 4d8be7 4d3bfe 0f8322020000 66666666660f1f840000000000 498bce }
            // n = 7, score = 100
            //   85f6                 | je                  0xbf
            //   75cc                 | dec                 ecx
            //   4d8be7               | mov                 ecx, ebp
            //   4d3bfe               | dec                 ebp
            //   0f8322020000         | mov                 eax, ebp
            //   66666666660f1f840000000000     | test    eax, eax
            //   498bce               | je                  0xc9

        $sequence_4 = { 41b8409c0000 ff15???????? 488905???????? 488bcb }
            // n = 4, score = 100
            //   41b8409c0000         | movzx               eax, byte ptr [edx + 1]
            //   ff15????????         |                     
            //   488905????????       |                     
            //   488bcb               | mov                 ecx, 0x1f

        $sequence_5 = { ff15???????? cc 4c8b0d???????? 4883c9ff }
            // n = 4, score = 100
            //   ff15????????         |                     
            //   cc                   | dec                 esp
            //   4c8b0d????????       |                     
            //   4883c9ff             | mov                 esi, dword ptr [esp + 0x90]

        $sequence_6 = { 488b0d???????? 482bdd ba08000000 48d1fb }
            // n = 4, score = 100
            //   488b0d????????       |                     
            //   482bdd               | mov                 dword ptr [ebx + 8], edi
            //   ba08000000           | dec                 ebp
            //   48d1fb               | mov                 dword ptr [ebx - 0x38], edi

        $sequence_7 = { 0f84ae000000 80393d 0f85a5000000 418bd6 }
            // n = 4, score = 100
            //   0f84ae000000         | je                  0xfffffc84
            //   80393d               | dec                 eax
            //   0f85a5000000         | lea                 edi, [esp + 0x20]
            //   418bd6               | dec                 eax

        $sequence_8 = { 448b1d???????? 8b2d???????? 4c8bac2448010000 8d4d01 }
            // n = 4, score = 100
            //   448b1d????????       |                     
            //   8b2d????????         |                     
            //   4c8bac2448010000     | inc                 ecx
            //   8d4d01               | cmp                 ebx, 5

        $sequence_9 = { 488be8 33c0 f3aa 84db 7410 458bc4 }
            // n = 6, score = 100
            //   488be8               | dec                 esp
            //   33c0                 | mov                 ebp, dword ptr [esp + 0x30]
            //   f3aa                 | jne                 0x14f3
            //   84db                 | nop                 dword ptr [eax + eax]
            //   7410                 | inc                 ecx
            //   458bc4               | mov                 esi, esi

    condition:
        7 of them and filesize < 50176
}