rule win_atmitch_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.atmitch."
        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.atmitch"
        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 = { 51 8bcc 89642404 68???????? ff15???????? }
            // n = 5, score = 100
            //   51                   | push                ecx
            //   8bcc                 | mov                 ecx, esp
            //   89642404             | mov                 dword ptr [esp + 4], esp
            //   68????????           |                     
            //   ff15????????         |                     

        $sequence_1 = { 84c0 74db e8???????? 85c0 }
            // n = 4, score = 100
            //   84c0                 | test                al, al
            //   74db                 | je                  0xffffffdd
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_2 = { c744243000000000 e8???????? 8bf0 c7442420ffffffff 8b44240c }
            // n = 5, score = 100
            //   c744243000000000     | mov                 dword ptr [esp + 0x30], 0
            //   e8????????           |                     
            //   8bf0                 | mov                 esi, eax
            //   c7442420ffffffff     | mov                 dword ptr [esp + 0x20], 0xffffffff
            //   8b44240c             | mov                 eax, dword ptr [esp + 0xc]

        $sequence_3 = { eb1a 51 8bcc 89642410 68???????? ff15???????? e8???????? }
            // n = 7, score = 100
            //   eb1a                 | jmp                 0x1c
            //   51                   | push                ecx
            //   8bcc                 | mov                 ecx, esp
            //   89642410             | mov                 dword ptr [esp + 0x10], esp
            //   68????????           |                     
            //   ff15????????         |                     
            //   e8????????           |                     

        $sequence_4 = { 8d4c241c ff15???????? 50 8d4c2418 c644244c06 }
            // n = 5, score = 100
            //   8d4c241c             | lea                 ecx, [esp + 0x1c]
            //   ff15????????         |                     
            //   50                   | push                eax
            //   8d4c2418             | lea                 ecx, [esp + 0x18]
            //   c644244c06           | mov                 byte ptr [esp + 0x4c], 6

        $sequence_5 = { 85c0 7408 8bc8 ff15???????? 8b4c2408 64890d00000000 }
            // n = 6, score = 100
            //   85c0                 | test                eax, eax
            //   7408                 | je                  0xa
            //   8bc8                 | mov                 ecx, eax
            //   ff15????????         |                     
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]
            //   64890d00000000       | mov                 dword ptr fs:[0], ecx

        $sequence_6 = { 0faf6c2414 6a0e e8???????? 8bf8 }
            // n = 4, score = 100
            //   0faf6c2414           | imul                ebp, dword ptr [esp + 0x14]
            //   6a0e                 | push                0xe
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_7 = { 6a00 b9???????? e8???????? 8d4c240c ff15???????? }
            // n = 5, score = 100
            //   6a00                 | push                0
            //   b9????????           |                     
            //   e8????????           |                     
            //   8d4c240c             | lea                 ecx, [esp + 0xc]
            //   ff15????????         |                     

        $sequence_8 = { 50 ff15???????? 56 51 8bcc }
            // n = 5, score = 100
            //   50                   | push                eax
            //   ff15????????         |                     
            //   56                   | push                esi
            //   51                   | push                ecx
            //   8bcc                 | mov                 ecx, esp

        $sequence_9 = { 51 8bcc 89642414 68???????? 66a3???????? ff15???????? }
            // n = 6, score = 100
            //   51                   | push                ecx
            //   8bcc                 | mov                 ecx, esp
            //   89642414             | mov                 dword ptr [esp + 0x14], esp
            //   68????????           |                     
            //   66a3????????         |                     
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 73728
}