rule win_ati_agent_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.ati_agent."
        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.ati_agent"
        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 = { 0f1f4000 0fb6040a 342e 6633c1 48ffc1 }
            // n = 5, score = 100
            //   0f1f4000             | inc                 ecx
            //   0fb6040a             | mov                 ecx, 3
            //   342e                 | dec                 ecx
            //   6633c1               | sar                 esp, 5
            //   48ffc1               | dec                 esp

        $sequence_1 = { 4c8d0d6286ffff 498bc9 e8???????? 85c0 7422 4d2bc1 }
            // n = 6, score = 100
            //   4c8d0d6286ffff       | mov                 ecx, 0x20119
            //   498bc9               | inc                 ebp
            //   e8????????           |                     
            //   85c0                 | xor                 eax, eax
            //   7422                 | dec                 eax
            //   4d2bc1               | mov                 ecx, 0x80000001

        $sequence_2 = { 6689844cee000000 4883f90a 72e2 488d442458 488d942410010000 }
            // n = 5, score = 100
            //   6689844cee000000     | arpl                cx, bx
            //   4883f90a             | dec                 eax
            //   72e2                 | lea                 ebp, [0xdf23]
            //   488d442458           | dec                 eax
            //   488d942410010000     | mov                 edi, ebx

        $sequence_3 = { e9???????? 48890d???????? c3 4883ec28 4c8bc1 4c8d0d6286ffff }
            // n = 6, score = 100
            //   e9????????           |                     
            //   48890d????????       |                     
            //   c3                   | inc                 ecx
            //   4883ec28             | mov                 esp, 0x314
            //   4c8bc1               | dec                 esp
            //   4c8d0d6286ffff       | lea                 eax, [0x5a64]

        $sequence_4 = { cc 4883ec28 85c9 7820 83f902 }
            // n = 5, score = 100
            //   cc                   | sub                 esp, 0x88
            //   4883ec28             | dec                 eax
            //   85c9                 | lea                 ecx, [0xd5c9]
            //   7820                 | dec                 eax
            //   83f902               | mov                 dword ptr [esp + 0x40], ecx

        $sequence_5 = { e8???????? 85c0 7408 8bcb ff15???????? e8???????? 488d15ae630000 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   85c0                 | dec                 ebx
            //   7408                 | mov                 esi, dword ptr [esi]
            //   8bcb                 | mov                 edi, 1
            //   ff15????????         |                     
            //   e8????????           |                     
            //   488d15ae630000       | cmp                 dword ptr [ebx + esi + 0xc], 0

        $sequence_6 = { 488b4c2438 4833cc e8???????? 4883c448 c3 4c8b05???????? 32c9 }
            // n = 7, score = 100
            //   488b4c2438           | sar                 eax, 5
            //   4833cc               | jae                 0x238
            //   e8????????           |                     
            //   4883c448             | dec                 eax
            //   c3                   | arpl                cx, bx
            //   4c8b05????????       |                     
            //   32c9                 | dec                 eax

        $sequence_7 = { 4863d9 4c8be3 49c1fc05 4c8d3572e10000 83e31f 486bdb58 4b8b34e6 }
            // n = 7, score = 100
            //   4863d9               | mov                 edx, ebx
            //   4c8be3               | dec                 eax
            //   49c1fc05             | mov                 eax, 0xaaaaaaab
            //   4c8d3572e10000       | stosb               byte ptr es:[edi], al
            //   83e31f               | stosb               byte ptr es:[edi], al
            //   486bdb58             | stosb               byte ptr es:[edi], al
            //   4b8b34e6             | sub                 dh, byte ptr [edx - 0x1e]

        $sequence_8 = { e8???????? ebc9 488bcb 488bc3 488d156ba30000 48c1f805 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   ebc9                 | and                 ebx, 0x1f
            //   488bcb               | dec                 eax
            //   488bc3               | sar                 edi, 5
            //   488d156ba30000       | dec                 eax
            //   48c1f805             | imul                ebx, ebx, 0x58

        $sequence_9 = { 4883d8ff c3 483bca 732d }
            // n = 4, score = 100
            //   4883d8ff             | dec                 eax
            //   c3                   | mov                 dword ptr [esp + 0x7d0], ebx
            //   483bca               | mov                 dword ptr [esp + 0x50], 0x618
            //   732d                 | inc                 ebp

    condition:
        7 of them and filesize < 172032
}