rule win_rtpos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.rtpos."
        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.rtpos"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 0f8536010000 837db000 750b 8b45bc 83c001 8945bc eb09 }
            // n = 7, score = 100
            //   0f8536010000         | jne                 0x13c
            //   837db000             | cmp                 dword ptr [ebp - 0x50], 0
            //   750b                 | jne                 0xd
            //   8b45bc               | mov                 eax, dword ptr [ebp - 0x44]
            //   83c001               | add                 eax, 1
            //   8945bc               | mov                 dword ptr [ebp - 0x44], eax
            //   eb09                 | jmp                 0xb

        $sequence_1 = { 6a04 6800300000 6800500600 6a00 ff15???????? 8b8d3cf9ffff 898170020000 }
            // n = 7, score = 100
            //   6a04                 | push                4
            //   6800300000           | push                0x3000
            //   6800500600           | push                0x65000
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   8b8d3cf9ffff         | mov                 ecx, dword ptr [ebp - 0x6c4]
            //   898170020000         | mov                 dword ptr [ecx + 0x270], eax

        $sequence_2 = { 8d45f4 64a300000000 64a12c000000 8b08 8b15???????? }
            // n = 5, score = 100
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   64a12c000000         | mov                 eax, dword ptr fs:[0x2c]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   8b15????????         |                     

        $sequence_3 = { 50 ff15???????? 0345ac 8945ac }
            // n = 4, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   0345ac               | add                 eax, dword ptr [ebp - 0x54]
            //   8945ac               | mov                 dword ptr [ebp - 0x54], eax

        $sequence_4 = { 50 8d45f4 64a300000000 837d0801 0f8eb1000000 b804000000 c1e000 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   64a300000000         | mov                 dword ptr fs:[0], eax
            //   837d0801             | cmp                 dword ptr [ebp + 8], 1
            //   0f8eb1000000         | jle                 0xb7
            //   b804000000           | mov                 eax, 4
            //   c1e000               | shl                 eax, 0

        $sequence_5 = { 83e03f c1fa06 6bc830 8b0495b86a4300 f644082801 7414 }
            // n = 6, score = 100
            //   83e03f               | and                 eax, 0x3f
            //   c1fa06               | sar                 edx, 6
            //   6bc830               | imul                ecx, eax, 0x30
            //   8b0495b86a4300       | mov                 eax, dword ptr [edx*4 + 0x436ab8]
            //   f644082801           | test                byte ptr [eax + ecx + 0x28], 1
            //   7414                 | je                  0x16

        $sequence_6 = { 6804010000 8d85f4fdffff 50 6a00 ff15???????? 85c0 751e }
            // n = 7, score = 100
            //   6804010000           | push                0x104
            //   8d85f4fdffff         | lea                 eax, [ebp - 0x20c]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   751e                 | jne                 0x20

        $sequence_7 = { 3b0cc5988d4200 7427 40 83f82d 72f1 8d41ed }
            // n = 6, score = 100
            //   3b0cc5988d4200       | cmp                 ecx, dword ptr [eax*8 + 0x428d98]
            //   7427                 | je                  0x29
            //   40                   | inc                 eax
            //   83f82d               | cmp                 eax, 0x2d
            //   72f1                 | jb                  0xfffffff3
            //   8d41ed               | lea                 eax, [ecx - 0x13]

        $sequence_8 = { c745fc00000000 8d4df0 e8???????? 8bf0 8d4df0 e8???????? }
            // n = 6, score = 100
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8d4df0               | lea                 ecx, [ebp - 0x10]
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   8d4df0               | lea                 ecx, [ebp - 0x10]
            //   e8????????           |                     

        $sequence_9 = { 8b9168020000 52 ff15???????? 85c0 7563 8b45b8 50 }
            // n = 7, score = 100
            //   8b9168020000         | mov                 edx, dword ptr [ecx + 0x268]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7563                 | jne                 0x65
            //   8b45b8               | mov                 eax, dword ptr [ebp - 0x48]
            //   50                   | push                eax

    condition:
        7 of them and filesize < 507904
}