rule win_unidentified_071_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.unidentified_071."
        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.unidentified_071"
        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 = { c9 c20400 53 8b5c2408 55 8b6c2414 56 }
            // n = 7, score = 400
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   53                   | push                ebx
            //   8b5c2408             | mov                 ebx, dword ptr [esp + 8]
            //   55                   | push                ebp
            //   8b6c2414             | mov                 ebp, dword ptr [esp + 0x14]
            //   56                   | push                esi

        $sequence_1 = { 7474 40 50 8945f8 e8???????? 8bc8 }
            // n = 6, score = 400
            //   7474                 | je                  0x76
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   e8????????           |                     
            //   8bc8                 | mov                 ecx, eax

        $sequence_2 = { c20400 53 8b5c240c 55 8b6c2418 56 8b742410 }
            // n = 7, score = 400
            //   c20400               | ret                 4
            //   53                   | push                ebx
            //   8b5c240c             | mov                 ebx, dword ptr [esp + 0xc]
            //   55                   | push                ebp
            //   8b6c2418             | mov                 ebp, dword ptr [esp + 0x18]
            //   56                   | push                esi
            //   8b742410             | mov                 esi, dword ptr [esp + 0x10]

        $sequence_3 = { 8b44242c 8b742428 59 59 }
            // n = 4, score = 400
            //   8b44242c             | mov                 eax, dword ptr [esp + 0x2c]
            //   8b742428             | mov                 esi, dword ptr [esp + 0x28]
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx

        $sequence_4 = { c9 c3 55 8b6c2408 56 8b742410 57 }
            // n = 7, score = 400
            //   c9                   | leave               
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8b6c2408             | mov                 ebp, dword ptr [esp + 8]
            //   56                   | push                esi
            //   8b742410             | mov                 esi, dword ptr [esp + 0x10]
            //   57                   | push                edi

        $sequence_5 = { 59 c3 8b0d???????? 53 8b1d???????? }
            // n = 5, score = 400
            //   59                   | pop                 ecx
            //   c3                   | ret                 
            //   8b0d????????         |                     
            //   53                   | push                ebx
            //   8b1d????????         |                     

        $sequence_6 = { c20400 8b542404 56 57 83ca07 bffeffff7f 3bd7 }
            // n = 7, score = 400
            //   c20400               | ret                 4
            //   8b542404             | mov                 edx, dword ptr [esp + 4]
            //   56                   | push                esi
            //   57                   | push                edi
            //   83ca07               | or                  edx, 7
            //   bffeffff7f           | mov                 edi, 0x7ffffffe
            //   3bd7                 | cmp                 edx, edi

        $sequence_7 = { 6b44242018 59 ff742420 89442418 03c7 8bc8 }
            // n = 6, score = 400
            //   6b44242018           | imul                eax, dword ptr [esp + 0x20], 0x18
            //   59                   | pop                 ecx
            //   ff742420             | push                dword ptr [esp + 0x20]
            //   89442418             | mov                 dword ptr [esp + 0x18], eax
            //   03c7                 | add                 eax, edi
            //   8bc8                 | mov                 ecx, eax

        $sequence_8 = { 66890e 85c0 75ec 8bc6 5e c3 8b5104 }
            // n = 7, score = 400
            //   66890e               | mov                 word ptr [esi], cx
            //   85c0                 | test                eax, eax
            //   75ec                 | jne                 0xffffffee
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi
            //   c3                   | ret                 
            //   8b5104               | mov                 edx, dword ptr [ecx + 4]

        $sequence_9 = { 55 e8???????? 33c0 83c410 6689042e 8b442414 83f808 }
            // n = 7, score = 400
            //   55                   | push                ebp
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   83c410               | add                 esp, 0x10
            //   6689042e             | mov                 word ptr [esi + ebp], ax
            //   8b442414             | mov                 eax, dword ptr [esp + 0x14]
            //   83f808               | cmp                 eax, 8

    condition:
        7 of them and filesize < 1220608
}