rule win_atmitch_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 6a0a 8d4c240c ff15???????? 6a0a 8d4c240c ff15???????? }
            // n = 6, score = 100
            //   6a0a                 | push                0xa
            //   8d4c240c             | lea                 ecx, [esp + 0xc]
            //   ff15????????         |                     
            //   6a0a                 | push                0xa
            //   8d4c240c             | lea                 ecx, [esp + 0xc]
            //   ff15????????         |                     

        $sequence_1 = { ff15???????? 85c0 7467 8d9b00000000 8b0d???????? 8d442414 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7467                 | je                  0x69
            //   8d9b00000000         | lea                 ebx, [ebx]
            //   8b0d????????         |                     
            //   8d442414             | lea                 eax, [esp + 0x14]

        $sequence_2 = { 5d c20c00 83f803 7545 68???????? 8d4c241c e8???????? }
            // n = 7, score = 100
            //   5d                   | pop                 ebp
            //   c20c00               | ret                 0xc
            //   83f803               | cmp                 eax, 3
            //   7545                 | jne                 0x47
            //   68????????           |                     
            //   8d4c241c             | lea                 ecx, [esp + 0x1c]
            //   e8????????           |                     

        $sequence_3 = { 75f9 2bc2 8bf8 8b06 8b4804 }
            // n = 5, score = 100
            //   75f9                 | jne                 0xfffffffb
            //   2bc2                 | sub                 eax, edx
            //   8bf8                 | mov                 edi, eax
            //   8b06                 | mov                 eax, dword ptr [esi]
            //   8b4804               | mov                 ecx, dword ptr [eax + 4]

        $sequence_4 = { 89442418 3bca 7304 894c2414 8b2c85e8630010 }
            // n = 5, score = 100
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   3bca                 | cmp                 ecx, edx
            //   7304                 | jae                 6
            //   894c2414             | mov                 dword ptr [esp + 0x14], ecx
            //   8b2c85e8630010       | mov                 ebp, dword ptr [eax*4 + 0x100063e8]

        $sequence_5 = { 52 ff15???????? 3bc7 747e c745ec04000000 }
            // n = 5, score = 100
            //   52                   | push                edx
            //   ff15????????         |                     
            //   3bc7                 | cmp                 eax, edi
            //   747e                 | je                  0x80
            //   c745ec04000000       | mov                 dword ptr [ebp - 0x14], 4

        $sequence_6 = { e8???????? 8b442414 8b3d???????? 83c404 50 ffd7 8b4c2410 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]
            //   8b3d????????         |                     
            //   83c404               | add                 esp, 4
            //   50                   | push                eax
            //   ffd7                 | call                edi
            //   8b4c2410             | mov                 ecx, dword ptr [esp + 0x10]

        $sequence_7 = { 8b442408 50 51 8bcc 89642414 68???????? 66a3???????? }
            // n = 7, score = 100
            //   8b442408             | mov                 eax, dword ptr [esp + 8]
            //   50                   | push                eax
            //   51                   | push                ecx
            //   8bcc                 | mov                 ecx, esp
            //   89642414             | mov                 dword ptr [esp + 0x14], esp
            //   68????????           |                     
            //   66a3????????         |                     

        $sequence_8 = { 8b4c2414 8b11 8b4270 ffd0 }
            // n = 4, score = 100
            //   8b4c2414             | mov                 ecx, dword ptr [esp + 0x14]
            //   8b11                 | mov                 edx, dword ptr [ecx]
            //   8b4270               | mov                 eax, dword ptr [edx + 0x70]
            //   ffd0                 | call                eax

        $sequence_9 = { e8???????? 8bcc 89642404 68???????? ff15???????? e8???????? 83c404 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8bcc                 | mov                 ecx, esp
            //   89642404             | mov                 dword ptr [esp + 4], esp
            //   68????????           |                     
            //   ff15????????         |                     
            //   e8????????           |                     
            //   83c404               | add                 esp, 4

    condition:
        7 of them and filesize < 73728
}