rule win_pwnpos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.pwnpos."
        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.pwnpos"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 8bec 83ec14 8b0d???????? 53 56 57 8b7904 }
            // n = 7, score = 100
            //   8bec                 | mov                 ebp, esp
            //   83ec14               | sub                 esp, 0x14
            //   8b0d????????         |                     
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   8b7904               | mov                 edi, dword ptr [ecx + 4]

        $sequence_1 = { 391d???????? 0f84a4000000 8d75d4 e8???????? 68???????? 50 c645fc01 }
            // n = 7, score = 100
            //   391d????????         |                     
            //   0f84a4000000         | je                  0xaa
            //   8d75d4               | lea                 esi, [ebp - 0x2c]
            //   e8????????           |                     
            //   68????????           |                     
            //   50                   | push                eax
            //   c645fc01             | mov                 byte ptr [ebp - 4], 1

        $sequence_2 = { 8bbd34ffffff 8d0c36 8bd7 2bd1 56 83c202 33c0 }
            // n = 7, score = 100
            //   8bbd34ffffff         | mov                 edi, dword ptr [ebp - 0xcc]
            //   8d0c36               | lea                 ecx, [esi + esi]
            //   8bd7                 | mov                 edx, edi
            //   2bd1                 | sub                 edx, ecx
            //   56                   | push                esi
            //   83c202               | add                 edx, 2
            //   33c0                 | xor                 eax, eax

        $sequence_3 = { 6800400000 8d8c2494000000 51 ff15???????? 85c0 7526 8b8c2498400000 }
            // n = 7, score = 100
            //   6800400000           | push                0x4000
            //   8d8c2494000000       | lea                 ecx, [esp + 0x94]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7526                 | jne                 0x28
            //   8b8c2498400000       | mov                 ecx, dword ptr [esp + 0x4098]

        $sequence_4 = { 0f83c6fbffff 03c7 03cf 83ff1f 0f87a4030000 ff24bd32a54200 8bc6 }
            // n = 7, score = 100
            //   0f83c6fbffff         | jae                 0xfffffbcc
            //   03c7                 | add                 eax, edi
            //   03cf                 | add                 ecx, edi
            //   83ff1f               | cmp                 edi, 0x1f
            //   0f87a4030000         | ja                  0x3aa
            //   ff24bd32a54200       | jmp                 dword ptr [edi*4 + 0x42a532]
            //   8bc6                 | mov                 eax, esi

        $sequence_5 = { 64a300000000 833d????????00 742d 8d442410 }
            // n = 4, score = 100
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   833d????????00       |                     
            //   742d                 | je                  0x2f
            //   8d442410             | lea                 eax, [esp + 0x10]

        $sequence_6 = { 3935???????? 7634 a1???????? 8b4804 51 }
            // n = 5, score = 100
            //   3935????????         |                     
            //   7634                 | jbe                 0x36
            //   a1????????           |                     
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]
            //   51                   | push                ecx

        $sequence_7 = { 8b8d74feffff 8b5104 8b841580feffff a806 7567 8b8c15acfeffff 8b11 }
            // n = 7, score = 100
            //   8b8d74feffff         | mov                 ecx, dword ptr [ebp - 0x18c]
            //   8b5104               | mov                 edx, dword ptr [ecx + 4]
            //   8b841580feffff       | mov                 eax, dword ptr [ebp + edx - 0x180]
            //   a806                 | test                al, 6
            //   7567                 | jne                 0x69
            //   8b8c15acfeffff       | mov                 ecx, dword ptr [ebp + edx - 0x154]
            //   8b11                 | mov                 edx, dword ptr [ecx]

        $sequence_8 = { 8b855cfeffff 894608 8b8570feffff 6bc00c 56 ff9010be4300 59 }
            // n = 7, score = 100
            //   8b855cfeffff         | mov                 eax, dword ptr [ebp - 0x1a4]
            //   894608               | mov                 dword ptr [esi + 8], eax
            //   8b8570feffff         | mov                 eax, dword ptr [ebp - 0x190]
            //   6bc00c               | imul                eax, eax, 0xc
            //   56                   | push                esi
            //   ff9010be4300         | call                dword ptr [eax + 0x43be10]
            //   59                   | pop                 ecx

        $sequence_9 = { 68???????? 8919 885904 e8???????? eb02 33f6 8937 }
            // n = 7, score = 100
            //   68????????           |                     
            //   8919                 | mov                 dword ptr [ecx], ebx
            //   885904               | mov                 byte ptr [ecx + 4], bl
            //   e8????????           |                     
            //   eb02                 | jmp                 4
            //   33f6                 | xor                 esi, esi
            //   8937                 | mov                 dword ptr [edi], esi

    condition:
        7 of them and filesize < 638976
}