rule win_tinymet_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.tinymet."
        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.tinymet"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { 83c410 0fbe00 83e830 743c 48 7435 }
            // n = 6, score = 100
            //   83c410               | add                 esp, 0x10
            //   0fbe00               | movsx               eax, byte ptr [eax]
            //   83e830               | sub                 eax, 0x30
            //   743c                 | je                  0x3e
            //   48                   | dec                 eax
            //   7435                 | je                  0x37

        $sequence_1 = { ff15???????? 85c0 7407 68???????? eb7d 53 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7407                 | je                  9
            //   68????????           |                     
            //   eb7d                 | jmp                 0x7f
            //   53                   | push                ebx

        $sequence_2 = { 56 ff15???????? 85c0 740a 68???????? e9???????? 53 }
            // n = 7, score = 100
            //   56                   | push                esi
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   740a                 | je                  0xc
            //   68????????           |                     
            //   e9????????           |                     
            //   53                   | push                ebx

        $sequence_3 = { 03d8 46 57 e8???????? 59 3bf0 72ee }
            // n = 7, score = 100
            //   03d8                 | add                 ebx, eax
            //   46                   | inc                 esi
            //   57                   | push                edi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   3bf0                 | cmp                 esi, eax
            //   72ee                 | jb                  0xfffffff0

        $sequence_4 = { e8???????? a3???????? a1???????? ff700c }
            // n = 4, score = 100
            //   e8????????           |                     
            //   a3????????           |                     
            //   a1????????           |                     
            //   ff700c               | push                dword ptr [eax + 0xc]

        $sequence_5 = { 83c005 50 6a00 ff15???????? a3???????? }
            // n = 5, score = 100
            //   83c005               | add                 eax, 5
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   a3????????           |                     

        $sequence_6 = { e8???????? 83c40c a3???????? ffd0 6a00 e8???????? }
            // n = 6, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   a3????????           |                     
            //   ffd0                 | call                eax
            //   6a00                 | push                0
            //   e8????????           |                     

        $sequence_7 = { ff15???????? 85c0 7507 68???????? eb4a 6a40 }
            // n = 6, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7507                 | jne                 9
            //   68????????           |                     
            //   eb4a                 | jmp                 0x4c
            //   6a40                 | push                0x40

    condition:
        7 of them and filesize < 57344
}