rule win_datper_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.datper"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { e8???????? 50 a1???????? 0502010000 50 e8???????? }
            // n = 6, score = 200
            //   e8????????           |                     
            //   50                   | push                eax
            //   a1????????           |                     
            //   0502010000           | add                 eax, 0x102
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_1 = { 33c0 8945bc eb07 c745bc01000000 }
            // n = 4, score = 200
            //   33c0                 | xor                 eax, eax
            //   8945bc               | mov                 dword ptr [ebp - 0x44], eax
            //   eb07                 | jmp                 9
            //   c745bc01000000       | mov                 dword ptr [ebp - 0x44], 1

        $sequence_2 = { 7405 83e804 8b00 8bd8 8b45f8 e8???????? 8bcb }
            // n = 7, score = 200
            //   7405                 | je                  7
            //   83e804               | sub                 eax, 4
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   8bd8                 | mov                 ebx, eax
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   e8????????           |                     
            //   8bcb                 | mov                 ecx, ebx

        $sequence_3 = { 81c468f7ffff 53 56 57 33c0 8945fc 33c0 }
            // n = 7, score = 200
            //   81c468f7ffff         | add                 esp, 0xfffff768
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   33c0                 | xor                 eax, eax
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   33c0                 | xor                 eax, eax

        $sequence_4 = { c60320 43 4e 75f9 }
            // n = 4, score = 200
            //   c60320               | mov                 byte ptr [ebx], 0x20
            //   43                   | inc                 ebx
            //   4e                   | dec                 esi
            //   75f9                 | jne                 0xfffffffb

        $sequence_5 = { ba???????? 8b45fc e8???????? 8b95f8f9ffff b8???????? }
            // n = 5, score = 200
            //   ba????????           |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   e8????????           |                     
            //   8b95f8f9ffff         | mov                 edx, dword ptr [ebp - 0x608]
            //   b8????????           |                     

        $sequence_6 = { 68???????? 8d852cf2ffff 50 e8???????? }
            // n = 4, score = 200
            //   68????????           |                     
            //   8d852cf2ffff         | lea                 eax, [ebp - 0xdd4]
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_7 = { 8d45d8 8b55f4 e8???????? 8b55d8 b901000000 b8???????? e8???????? }
            // n = 7, score = 200
            //   8d45d8               | lea                 eax, [ebp - 0x28]
            //   8b55f4               | mov                 edx, dword ptr [ebp - 0xc]
            //   e8????????           |                     
            //   8b55d8               | mov                 edx, dword ptr [ebp - 0x28]
            //   b901000000           | mov                 ecx, 1
            //   b8????????           |                     
            //   e8????????           |                     

        $sequence_8 = { 7500 87c0 6903fa01e927 97 89bc2440f5ffff 8bf8 }
            // n = 6, score = 100
            //   7500                 | jne                 2
            //   87c0                 | xchg                eax, eax
            //   6903fa01e927         | imul                eax, dword ptr [ebx], 0x27e901fa
            //   97                   | xchg                eax, edi
            //   89bc2440f5ffff       | mov                 dword ptr [esp - 0xac0], edi
            //   8bf8                 | mov                 edi, eax

        $sequence_9 = { 87c0 87ed 87db 810326b15652 8bc9 87c0 }
            // n = 6, score = 100
            //   87c0                 | xchg                eax, eax
            //   87ed                 | xchg                ebp, ebp
            //   87db                 | xchg                ebx, ebx
            //   810326b15652         | add                 dword ptr [ebx], 0x5256b126
            //   8bc9                 | mov                 ecx, ecx
            //   87c0                 | xchg                eax, eax

        $sequence_10 = { 5f 7500 7500 90 }
            // n = 4, score = 100
            //   5f                   | pop                 edi
            //   7500                 | jne                 2
            //   7500                 | jne                 2
            //   90                   | nop                 

        $sequence_11 = { 89bc2440f5ffff 8bf8 8b842440f5ffff 90 95 89ac2430f2ffff 8be8 }
            // n = 7, score = 100
            //   89bc2440f5ffff       | mov                 dword ptr [esp - 0xac0], edi
            //   8bf8                 | mov                 edi, eax
            //   8b842440f5ffff       | mov                 eax, dword ptr [esp - 0xac0]
            //   90                   | nop                 
            //   95                   | xchg                eax, ebp
            //   89ac2430f2ffff       | mov                 dword ptr [esp - 0xdd0], ebp
            //   8be8                 | mov                 ebp, eax

        $sequence_12 = { 8bff 87ff 87c0 59 f7d7 f7d7 }
            // n = 6, score = 100
            //   8bff                 | mov                 edi, edi
            //   87ff                 | xchg                edi, edi
            //   87c0                 | xchg                eax, eax
            //   59                   | pop                 ecx
            //   f7d7                 | not                 edi
            //   f7d7                 | not                 edi

        $sequence_13 = { 90 9b 8d1b 8d55fc }
            // n = 4, score = 100
            //   90                   | nop                 
            //   9b                   | wait                
            //   8d1b                 | lea                 ebx, [ebx]
            //   8d55fc               | lea                 edx, [ebp - 4]

        $sequence_14 = { 810303833f1e 96 89b42400f4ffff 8bf0 8b842400f4ffff }
            // n = 5, score = 100
            //   810303833f1e         | add                 dword ptr [ebx], 0x1e3f8303
            //   96                   | xchg                eax, esi
            //   89b42400f4ffff       | mov                 dword ptr [esp - 0xc00], esi
            //   8bf0                 | mov                 esi, eax
            //   8b842400f4ffff       | mov                 eax, dword ptr [esp - 0xc00]

        $sequence_15 = { f7d2 68???????? f7d4 f7d4 87f6 8bd2 }
            // n = 6, score = 100
            //   f7d2                 | not                 edx
            //   68????????           |                     
            //   f7d4                 | not                 esp
            //   f7d4                 | not                 esp
            //   87f6                 | xchg                esi, esi
            //   8bd2                 | mov                 edx, edx

    condition:
        7 of them and filesize < 565248
}