rule win_tinymet_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.tinymet"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        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 / approach 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 = { ffd3 03f8 2bf0 75e7 a1???????? }
            // n = 5, score = 100
            //   ffd3                 | call                ebx
            //   03f8                 | add                 edi, eax
            //   2bf0                 | sub                 esi, eax
            //   75e7                 | jne                 0xffffffe9
            //   a1????????           |                     

        $sequence_1 = { ff15???????? 50 e8???????? 59 8d45f0 6a04 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   50                   | push                eax
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   6a04                 | push                4

        $sequence_2 = { 72ee 5f 5e 0fb6c3 5b }
            // n = 5, score = 100
            //   72ee                 | jb                  0xfffffff0
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   0fb6c3               | movzx               eax, bl
            //   5b                   | pop                 ebx

        $sequence_3 = { 750a 68???????? e9???????? 53 56 }
            // n = 5, score = 100
            //   750a                 | jne                 0xc
            //   68????????           |                     
            //   e9????????           |                     
            //   53                   | push                ebx
            //   56                   | push                esi

        $sequence_4 = { 7435 48 741d 48 7416 }
            // n = 5, score = 100
            //   7435                 | je                  0x37
            //   48                   | dec                 eax
            //   741d                 | je                  0x1f
            //   48                   | dec                 eax
            //   7416                 | je                  0x18

        $sequence_5 = { eb17 6a00 ebe9 6a00 ff35???????? ff35???????? e8???????? }
            // n = 7, score = 100
            //   eb17                 | jmp                 0x19
            //   6a00                 | push                0
            //   ebe9                 | jmp                 0xffffffeb
            //   6a00                 | push                0
            //   ff35????????         |                     
            //   ff35????????         |                     
            //   e8????????           |                     

        $sequence_6 = { 885de8 895de9 885ded 895dfc ff15???????? 50 }
            // n = 6, score = 100
            //   885de8               | mov                 byte ptr [ebp - 0x18], bl
            //   895de9               | mov                 dword ptr [ebp - 0x17], ebx
            //   885ded               | mov                 byte ptr [ebp - 0x13], bl
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_7 = { 8bc6 5f 5e 5d c3 a1???????? 56 }
            // n = 7, score = 100
            //   8bc6                 | mov                 eax, esi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   a1????????           |                     
            //   56                   | push                esi

    condition:
        7 of them and filesize < 57344
}