rule win_tinymet_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        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 = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 51 6a00 ff15???????? 57 }
            // n = 4, score = 100
            //   51                   | push                ecx
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   57                   | push                edi

        $sequence_1 = { 59 3bf0 72ee 5f 5e 0fb6c3 5b }
            // n = 7, score = 100
            //   59                   | pop                 ecx
            //   3bf0                 | cmp                 esi, eax
            //   72ee                 | jb                  0xfffffff0
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   0fb6c3               | movzx               eax, bl
            //   5b                   | pop                 ebx

        $sequence_2 = { 53 56 ff15???????? 8bf0 83feff 751b 68???????? }
            // n = 7, score = 100
            //   53                   | push                ebx
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bf0                 | mov                 esi, eax
            //   83feff               | cmp                 esi, -1
            //   751b                 | jne                 0x1d
            //   68????????           |                     

        $sequence_3 = { ff25???????? ff25???????? ff25???????? 55 8bec ff15???????? 50 }
            // n = 7, score = 100
            //   ff25????????         |                     
            //   ff25????????         |                     
            //   ff25????????         |                     
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   ff15????????         |                     
            //   50                   | push                eax

        $sequence_4 = { e9???????? 8b400c ff750c 8b00 }
            // n = 4, score = 100
            //   e9????????           |                     
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   8b00                 | mov                 eax, dword ptr [eax]

        $sequence_5 = { e8???????? 8d45f0 50 8d45e8 50 e8???????? 83c410 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   8d45f0               | lea                 eax, dword ptr [ebp - 0x10]
            //   50                   | push                eax
            //   8d45e8               | lea                 eax, dword ptr [ebp - 0x18]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10

        $sequence_6 = { 7416 6a04 8d45fc c745fc80330000 50 6a1f }
            // n = 6, score = 100
            //   7416                 | je                  0x18
            //   6a04                 | push                4
            //   8d45fc               | lea                 eax, dword ptr [ebp - 4]
            //   c745fc80330000       | mov                 dword ptr [ebp - 4], 0x3380
            //   50                   | push                eax
            //   6a1f                 | push                0x1f

        $sequence_7 = { 7507 68???????? eb4a 6a40 6800100000 }
            // n = 5, score = 100
            //   7507                 | jne                 9
            //   68????????           |                     
            //   eb4a                 | jmp                 0x4c
            //   6a40                 | push                0x40
            //   6800100000           | push                0x1000

    condition:
        7 of them and filesize < 57344
}