rule win_rtpos_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "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 = { c700???????? 8b4d08 51 8b55f0 }
            // n = 4, score = 100
            //   c700????????         |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   51                   | push                ecx
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]

        $sequence_1 = { 51 ff15???????? e9???????? ff15???????? 8945c4 8b55ec 8955c8 }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   e9????????           |                     
            //   ff15????????         |                     
            //   8945c4               | mov                 dword ptr [ebp - 0x3c], eax
            //   8b55ec               | mov                 edx, dword ptr [ebp - 0x14]
            //   8955c8               | mov                 dword ptr [ebp - 0x38], edx

        $sequence_2 = { eb9a c745f400000000 837dc800 0f8696000000 837df400 740e 8b4df4 }
            // n = 7, score = 100
            //   eb9a                 | jmp                 0xffffff9c
            //   c745f400000000       | mov                 dword ptr [ebp - 0xc], 0
            //   837dc800             | cmp                 dword ptr [ebp - 0x38], 0
            //   0f8696000000         | jbe                 0x9c
            //   837df400             | cmp                 dword ptr [ebp - 0xc], 0
            //   740e                 | je                  0x10
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_3 = { 52 8b4508 8b88a4040000 51 ff15???????? 8985b8fcffff 8b4dfc }
            // n = 7, score = 100
            //   52                   | push                edx
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   8b88a4040000         | mov                 ecx, dword ptr [eax + 0x4a4]
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8985b8fcffff         | mov                 dword ptr [ebp - 0x348], eax
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]

        $sequence_4 = { 85c0 7507 b801000000 eb0d 8b45fc 83c001 8945fc }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   7507                 | jne                 9
            //   b801000000           | mov                 eax, 1
            //   eb0d                 | jmp                 0xf
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   83c001               | add                 eax, 1
            //   8945fc               | mov                 dword ptr [ebp - 4], eax

        $sequence_5 = { 8b55d8 52 ff15???????? 8945dc 837ddc00 }
            // n = 5, score = 100
            //   8b55d8               | mov                 edx, dword ptr [ebp - 0x28]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   8945dc               | mov                 dword ptr [ebp - 0x24], eax
            //   837ddc00             | cmp                 dword ptr [ebp - 0x24], 0

        $sequence_6 = { 8b45bc 50 8b4dac e8???????? 8945b4 837db4ff }
            // n = 6, score = 100
            //   8b45bc               | mov                 eax, dword ptr [ebp - 0x44]
            //   50                   | push                eax
            //   8b4dac               | mov                 ecx, dword ptr [ebp - 0x54]
            //   e8????????           |                     
            //   8945b4               | mov                 dword ptr [ebp - 0x4c], eax
            //   837db4ff             | cmp                 dword ptr [ebp - 0x4c], -1

        $sequence_7 = { 6800300000 8b85e4fdffff 50 6a00 ff15???????? }
            // n = 5, score = 100
            //   6800300000           | push                0x3000
            //   8b85e4fdffff         | mov                 eax, dword ptr [ebp - 0x21c]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     

        $sequence_8 = { 8b4dd0 894dcc c745fc00000000 8b55cc 52 8b4dd4 }
            // n = 6, score = 100
            //   8b4dd0               | mov                 ecx, dword ptr [ebp - 0x30]
            //   894dcc               | mov                 dword ptr [ebp - 0x34], ecx
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   8b55cc               | mov                 edx, dword ptr [ebp - 0x34]
            //   52                   | push                edx
            //   8b4dd4               | mov                 ecx, dword ptr [ebp - 0x2c]

        $sequence_9 = { 8bc8 d1f9 6a41 5f 894df0 8b34cd98c64200 }
            // n = 6, score = 100
            //   8bc8                 | mov                 ecx, eax
            //   d1f9                 | sar                 ecx, 1
            //   6a41                 | push                0x41
            //   5f                   | pop                 edi
            //   894df0               | mov                 dword ptr [ebp - 0x10], ecx
            //   8b34cd98c64200       | mov                 esi, dword ptr [ecx*8 + 0x42c698]

    condition:
        7 of them and filesize < 507904
}