rule win_aukill_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.aukill."
        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.aukill"
        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 = { 48895c2440 48894c2438 4c8d442440 48894c2430 }
            // n = 4, score = 200
            //   48895c2440           | mov                 edx, 0x10000000
            //   48894c2438           | inc                 ebp
            //   4c8d442440           | xor                 ecx, ecx
            //   48894c2430           | dec                 eax

        $sequence_1 = { 771c 488b0b ff15???????? 0fb608 }
            // n = 4, score = 200
            //   771c                 | dec                 eax
            //   488b0b               | mov                 ecx, dword ptr [ebx]
            //   ff15????????         |                     
            //   0fb608               | dec                 eax

        $sequence_2 = { 0f114c2428 f2410f1044d118 f20f11442438 660f7ec8 }
            // n = 4, score = 200
            //   0f114c2428           | movups              xmmword ptr [ebp - 0x20], xmm0
            //   f2410f1044d118       | movups              xmmword ptr [ebp - 0x10], xmm0
            //   f20f11442438         | movups              xmmword ptr [ebp - 0x40], xmm0
            //   660f7ec8             | dec                 eax

        $sequence_3 = { 488bd3 33c9 ff15???????? 85c0 751f 488b4c2458 ff15???????? }
            // n = 7, score = 200
            //   488bd3               | mov                 eax, dword ptr [ecx + edi*8]
            //   33c9                 | inc                 edx
            //   ff15????????         |                     
            //   85c0                 | test                byte ptr [eax + 0x38], 1
            //   751f                 | dec                 ecx
            //   488b4c2458           | sar                 edi, 6
            //   ff15????????         |                     

        $sequence_4 = { ba28000000 488bc8 ff15???????? 85c0 7514 ff15???????? }
            // n = 6, score = 200
            //   ba28000000           | mov                 eax, esi
            //   488bc8               | dec                 ebp
            //   ff15????????         |                     
            //   85c0                 | lea                 ecx, [esp + 0x10]
            //   7514                 | dec                 esp
            //   ff15????????         |                     

        $sequence_5 = { e8???????? 4c8bc8 4533c0 4489442420 453b01 7346 4b8d1440 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   4c8bc8               | dec                 eax
            //   4533c0               | mov                 edi, eax
            //   4489442420           | movzx               ecx, byte ptr [edx + eax*4 + 0x20cf2]
            //   453b01               | inc                 ecx
            //   7346                 | cmp                 ecx, esp
            //   4b8d1440             | jne                 0x1450

        $sequence_6 = { 4c897c2428 4c8d442440 41b910000000 4c897c2420 }
            // n = 4, score = 200
            //   4c897c2428           | mov                 ecx, ebx
            //   4c8d442440           | jmp                 0x13d
            //   41b910000000         | inc                 cx
            //   4c897c2420           | cmp                 eax, 0x2a

        $sequence_7 = { 85c0 751f 488b4c2458 ff15???????? ff15???????? }
            // n = 5, score = 200
            //   85c0                 | dec                 eax
            //   751f                 | mov                 ecx, ebx
            //   488b4c2458           | test                edi, edi
            //   ff15????????         |                     
            //   ff15????????         |                     

        $sequence_8 = { 410f104cd108 0f114c2428 f2410f1044d118 f20f11442438 }
            // n = 4, score = 200
            //   410f104cd108         | xor                 edx, edx
            //   0f114c2428           | dec                 eax
            //   f2410f1044d118       | lea                 ecx, [esp + 0x9a]
            //   f20f11442438         | inc                 ecx

        $sequence_9 = { 771c 488b0b ff15???????? 0fb608 fec9 0fb6d1 488b0b }
            // n = 7, score = 200
            //   771c                 | dec                 eax
            //   488b0b               | mov                 ecx, eax
            //   ff15????????         |                     
            //   0fb608               | dec                 eax
            //   fec9                 | lea                 edx, [0x2c2d]
            //   0fb6d1               | dec                 eax
            //   488b0b               | lea                 ecx, [0x2b54]

    condition:
        7 of them and filesize < 446464
}