rule win_tinymet_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 83c005 56 03c7 50 ff75fc ffd3 }
            // n = 6, score = 100
            //   83c005               | add                 eax, 5
            //   56                   | push                esi
            //   03c7                 | add                 eax, edi
            //   50                   | push                eax
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   ffd3                 | call                ebx

        $sequence_1 = { 6a3e 59 f7f1 8a821c104000 }
            // n = 4, score = 100
            //   6a3e                 | push                0x3e
            //   59                   | pop                 ecx
            //   f7f1                 | div                 ecx
            //   8a821c104000         | mov                 al, byte ptr [edx + 0x40101c]

        $sequence_2 = { 51 6a00 ff15???????? 57 ff7508 }
            // n = 5, score = 100
            //   51                   | push                ecx
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   57                   | push                edi
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_3 = { 83c9ff 8bf8 894df8 85c9 741d 8d45f8 }
            // n = 6, score = 100
            //   83c9ff               | or                  ecx, 0xffffffff
            //   8bf8                 | mov                 edi, eax
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   85c9                 | test                ecx, ecx
            //   741d                 | je                  0x1f
            //   8d45f8               | lea                 eax, [ebp - 8]

        $sequence_4 = { e8???????? 83c40c 6aff e8???????? cc }
            // n = 5, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   6aff                 | push                -1
            //   e8????????           |                     
            //   cc                   | int3                

        $sequence_5 = { a1???????? 59 50 ff35???????? }
            // n = 4, score = 100
            //   a1????????           |                     
            //   59                   | pop                 ecx
            //   50                   | push                eax
            //   ff35????????         |                     

        $sequence_6 = { 56 ff15???????? 8b4df8 03d9 }
            // n = 4, score = 100
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   03d9                 | add                 ebx, ecx

        $sequence_7 = { 8bec 83ec18 53 33db 56 57 885df0 }
            // n = 7, score = 100
            //   8bec                 | mov                 ebp, esp
            //   83ec18               | sub                 esp, 0x18
            //   53                   | push                ebx
            //   33db                 | xor                 ebx, ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   885df0               | mov                 byte ptr [ebp - 0x10], bl

    condition:
        7 of them and filesize < 57344
}