rule win_poslurp_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 0f1f440000 418bc0 b908000000 a801 }
            // n = 4, score = 100
            //   0f1f440000           | movzx               eax, word ptr [edx]
            //   418bc0               | cmp                 ax, 0x30
            //   b908000000           | jb                  0x6b
            //   a801                 | nop                 dword ptr [eax]

        $sequence_1 = { 7506 807b015a 7409 4881eb00100000 ebec }
            // n = 5, score = 100
            //   7506                 | xor                 ecx, ecx
            //   807b015a             | inc                 ebp
            //   7409                 | xor                 eax, eax
            //   4881eb00100000       | xor                 edx, edx
            //   ebec                 | dec                 eax

        $sequence_2 = { 498bce e8???????? 85c0 7408 498bce e8???????? }
            // n = 6, score = 100
            //   498bce               | jae                 0x6e5
            //   e8????????           |                     
            //   85c0                 | mov                 eax, dword ptr [ebx + 0x24]
            //   7408                 | dec                 eax
            //   498bce               | mov                 edi, dword ptr [esp + 0x10]
            //   e8????????           |                     

        $sequence_3 = { 7434 ffc1 4883c004 3bca 72f1 81fa10270000 }
            // n = 6, score = 100
            //   7434                 | mov                 ecx, eax
            //   ffc1                 | dec                 eax
            //   4883c004             | mov                 ecx, edi
            //   3bca                 | dec                 eax
            //   72f1                 | mov                 ecx, edi
            //   81fa10270000         | xor                 edx, edx

        $sequence_4 = { 4c8d2503280000 4c8d35bc270000 418b1424 85d2 }
            // n = 4, score = 100
            //   4c8d2503280000       | dec                 ecx
            //   4c8d35bc270000       | mov                 dword ptr [esp], eax
            //   418b1424             | dec                 eax
            //   85d2                 | mov                 eax, dword ptr [esp + 0x88]

        $sequence_5 = { 486bc922 4803c8 4183c101 664589644d00 }
            // n = 4, score = 100
            //   486bc922             | inc                 esp
            //   4803c8               | or                  ecx, edx
            //   4183c101             | dec                 ecx
            //   664589644d00         | sub                 ebx, 1

        $sequence_6 = { 458b0491 4433c0 83c7ff 75df 8b15???????? }
            // n = 5, score = 100
            //   458b0491             | dec                 ecx
            //   4433c0               | mov                 edi, ebx
            //   83c7ff               | test                ecx, ecx
            //   75df                 | je                  0x154
            //   8b15????????         |                     

        $sequence_7 = { 8bcb 83ea01 0f8491000000 0f1f840000000000 410fbe0424 ffca 83e830 }
            // n = 7, score = 100
            //   8bcb                 | dec                 ebp
            //   83ea01               | test                esp, esp
            //   0f8491000000         | test                edx, edx
            //   0f1f840000000000     | jne                 0xde9
            //   410fbe0424           | lea                 eax, dword ptr [edi - 0xf]
            //   ffca                 | cmp                 eax, 5
            //   83e830               | ja                  0xec2

        $sequence_8 = { 4533c0 4889442430 33d2 488bcf 48895c2428 48895c2420 }
            // n = 6, score = 100
            //   4533c0               | dec                 eax
            //   4889442430           | mov                 ecx, edi
            //   33d2                 | dec                 esp
            //   488bcf               | mov                 dword ptr [esp + 0x30], ebp
            //   48895c2428           | dec                 eax
            //   48895c2420           | mov                 ebx, dword ptr [edx + 0x30]

        $sequence_9 = { 0f1f440000 418bf6 498bed 412bf5 448bc6 4d03c5 85f6 }
            // n = 7, score = 100
            //   0f1f440000           | inc                 esp
            //   418bf6               | cmp                 ebx, ebp
            //   498bed               | jae                 0x291
            //   412bf5               | xor                 ecx, ecx
            //   448bc6               | int3                
            //   4d03c5               | dec                 eax
            //   85f6                 | or                  ecx, 0xffffffff

    condition:
        7 of them and filesize < 50176
}