rule win_poslurp_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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 = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { ba00000040 c744242802000000 c744242004000000 ff15???????? 4883f8ff 7409 488bc8 }
            // n = 7, score = 100
            //   ba00000040           | cmp                 byte ptr [eax + 0x10], 0x3d
            //   c744242802000000     | mov                 ecx, ebx
            //   c744242004000000     | sub                 edx, 1
            //   ff15????????         |                     
            //   4883f8ff             | je                  0xc7e
            //   7409                 | nop                 dword ptr [eax + eax]
            //   488bc8               | inc                 ecx

        $sequence_1 = { 4c8bc6 33d2 ff15???????? 488b5c2450 488b6c2460 488b742468 }
            // n = 6, score = 100
            //   4c8bc6               | dec                 ebp
            //   33d2                 | test                esp, esp
            //   ff15????????         |                     
            //   488b5c2450           | je                  0x1190
            //   488b6c2460           | lea                 eax, [edx - 0xf]
            //   488b742468           | cmp                 eax, 5

        $sequence_2 = { 0f87fd000000 668378203d 0f85f2000000 498bce 33d2 488d5822 482bc8 }
            // n = 7, score = 100
            //   0f87fd000000         | add                 esi, ecx
            //   668378203d           | dec                 esp
            //   0f85f2000000         | mov                 ebp, ecx
            //   498bce               | xor                 ebx, ebx
            //   33d2                 | inc                 esp
            //   488d5822             | lea                 eax, [edi + 2]
            //   482bc8               | mov                 edx, 0x40000000

        $sequence_3 = { c744242802000000 c744242004000000 ff15???????? 4883f8ff }
            // n = 4, score = 100
            //   c744242802000000     | dec                 esp
            //   c744242004000000     | mov                 esp, dword ptr [esp + 0x2b8]
            //   ff15????????         |                     
            //   4883f8ff             | dec                 eax

        $sequence_4 = { 75ea 8d42f1 83f80f 0f878e000000 4885f6 0f8485000000 493bef }
            // n = 7, score = 100
            //   75ea                 | lea                 ecx, [esp + 0x90]
            //   8d42f1               | dec                 eax
            //   83f80f               | lea                 eax, [0xfffff90b]
            //   0f878e000000         | dec                 eax
            //   4885f6               | mov                 dword ptr [esp + 0x40], ecx
            //   0f8485000000         | dec                 eax
            //   493bef               | mov                 dword ptr [esp + 0x38], ebx

        $sequence_5 = { 740e 0f1f4000 488b1b 66837b3818 }
            // n = 4, score = 100
            //   740e                 | mov                 edi, eax
            //   0f1f4000             | dec                 eax
            //   488b1b               | test                eax, eax
            //   66837b3818           | je                  0x551

        $sequence_6 = { 4903cd e8???????? 448b0d???????? 8903 ffc6 }
            // n = 5, score = 100
            //   4903cd               | repne scasd         eax, dword ptr es:[edi]
            //   e8????????           |                     
            //   448b0d????????       |                     
            //   8903                 | xor                 eax, eax
            //   ffc6                 | dec                 eax

        $sequence_7 = { 443bdd 7309 33c9 ff15???????? }
            // n = 4, score = 100
            //   443bdd               | mov                 esp, edx
            //   7309                 | dec                 esp
            //   33c9                 | mov                 ebp, ecx
            //   ff15????????         |                     

        $sequence_8 = { 33d2 488bcb ff15???????? 498bcd ff15???????? 498bcc }
            // n = 6, score = 100
            //   33d2                 | dec                 eax
            //   488bcb               | mov                 ecx, ebx
            //   ff15????????         |                     
            //   498bcd               | mov                 dword ptr [esp + 0x40], 0x238
            //   ff15????????         |                     
            //   498bcc               | test                eax, eax

        $sequence_9 = { 4885ed 0f8461fdffff 488d7c2438 488bf5 b920000000 f3a4 488d4d02 }
            // n = 7, score = 100
            //   4885ed               | inc                 ecx
            //   0f8461fdffff         | mov                 ebx, ebp
            //   488d7c2438           | jbe                 0xe75
            //   488bf5               | nop                 dword ptr [eax]
            //   b920000000           | dec                 eax
            //   f3a4                 | mov                 ecx, ebx
            //   488d4d02             | dec                 eax

    condition:
        7 of them and filesize < 50176
}