rule win_datper_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.datper"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { 55 8bec 81c4e8f3ffff 53 56 57 33c9 }
            // n = 7, score = 200
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81c4e8f3ffff         | add                 esp, 0xfffff3e8
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   33c9                 | xor                 ecx, ecx

        $sequence_1 = { 6a00 8d45a4 50 8b45bc 50 56 }
            // n = 6, score = 200
            //   6a00                 | push                0
            //   8d45a4               | lea                 eax, [ebp - 0x5c]
            //   50                   | push                eax
            //   8b45bc               | mov                 eax, dword ptr [ebp - 0x44]
            //   50                   | push                eax
            //   56                   | push                esi

        $sequence_2 = { ffd0 68???????? a1???????? 8b00 ffd0 6a32 e8???????? }
            // n = 7, score = 200
            //   ffd0                 | call                eax
            //   68????????           |                     
            //   a1????????           |                     
            //   8b00                 | mov                 eax, dword ptr [eax]
            //   ffd0                 | call                eax
            //   6a32                 | push                0x32
            //   e8????????           |                     

        $sequence_3 = { 66c7856cfeffff0000 eb09 66c7856cfeffff0500 8d852cfeffff 50 }
            // n = 5, score = 200
            //   66c7856cfeffff0000     | mov    word ptr [ebp - 0x194], 0
            //   eb09                 | jmp                 0xb
            //   66c7856cfeffff0500     | mov    word ptr [ebp - 0x194], 5
            //   8d852cfeffff         | lea                 eax, [ebp - 0x1d4]
            //   50                   | push                eax

        $sequence_4 = { 50 e8???????? 8bd8 8d45f8 e8???????? 4b }
            // n = 6, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   8bd8                 | mov                 ebx, eax
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   e8????????           |                     
            //   4b                   | dec                 ebx

        $sequence_5 = { 8945e8 8b45e8 c1e802 8d0440 8945e4 6a00 8d45f8 }
            // n = 7, score = 200
            //   8945e8               | mov                 dword ptr [ebp - 0x18], eax
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   c1e802               | shr                 eax, 2
            //   8d0440               | lea                 eax, [eax + eax*2]
            //   8945e4               | mov                 dword ptr [ebp - 0x1c], eax
            //   6a00                 | push                0
            //   8d45f8               | lea                 eax, [ebp - 8]

        $sequence_6 = { eb15 68???????? 56 e8???????? 85c0 56 }
            // n = 6, score = 200
            //   eb15                 | jmp                 0x17
            //   68????????           |                     
            //   56                   | push                esi
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   56                   | push                esi

        $sequence_7 = { 50 8b45f0 e8???????? 0fb64de7 8bd7 e8???????? }
            // n = 6, score = 200
            //   50                   | push                eax
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   e8????????           |                     
            //   0fb64de7             | movzx               ecx, byte ptr [ebp - 0x19]
            //   8bd7                 | mov                 edx, edi
            //   e8????????           |                     

        $sequence_8 = { 2beb 8b5c2410 2bdd 7c13 43 8b442404 e8???????? }
            // n = 7, score = 200
            //   2beb                 | sub                 ebp, ebx
            //   8b5c2410             | mov                 ebx, dword ptr [esp + 0x10]
            //   2bdd                 | sub                 ebx, ebp
            //   7c13                 | jl                  0x15
            //   43                   | inc                 ebx
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   e8????????           |                     

        $sequence_9 = { 6a00 8d8564d7ffff 50 8d45f0 }
            // n = 4, score = 200
            //   6a00                 | push                0
            //   8d8564d7ffff         | lea                 eax, [ebp - 0x289c]
            //   50                   | push                eax
            //   8d45f0               | lea                 eax, [ebp - 0x10]

    condition:
        7 of them and filesize < 253952
}