rule win_tinymet_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        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 = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 0f8545010000 ff7508 ff15???????? 85c0 750a }
            // n = 5, score = 100
            //   0f8545010000         | jne                 0x14b
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   750a                 | jne                 0xc

        $sequence_1 = { 33db 57 8bf3 e8???????? 59 85c0 7412 }
            // n = 7, score = 100
            //   33db                 | xor                 ebx, ebx
            //   57                   | push                edi
            //   8bf3                 | mov                 esi, ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax
            //   7412                 | je                  0x14

        $sequence_2 = { eb17 837dfc01 0f8594000000 ff30 }
            // n = 4, score = 100
            //   eb17                 | jmp                 0x19
            //   837dfc01             | cmp                 dword ptr [ebp - 4], 1
            //   0f8594000000         | jne                 0x9a
            //   ff30                 | push                dword ptr [eax]

        $sequence_3 = { 8d043b 50 56 ff15???????? 8b4df8 }
            // n = 5, score = 100
            //   8d043b               | lea                 eax, dword ptr [ebx + edi]
            //   50                   | push                eax
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]

        $sequence_4 = { 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

        $sequence_5 = { ff15???????? 85c0 740a 68???????? e9???????? 53 53 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   740a                 | je                  0xc
            //   68????????           |                     
            //   e9????????           |                     
            //   53                   | push                ebx
            //   53                   | push                ebx

        $sequence_6 = { 7407 68???????? eb7d 53 8b1d???????? }
            // n = 5, score = 100
            //   7407                 | je                  9
            //   68????????           |                     
            //   eb7d                 | jmp                 0x7f
            //   53                   | push                ebx
            //   8b1d????????         |                     

        $sequence_7 = { a3???????? a1???????? ff700c e8???????? }
            // n = 4, score = 100
            //   a3????????           |                     
            //   a1????????           |                     
            //   ff700c               | push                dword ptr [eax + 0xc]
            //   e8????????           |                     

    condition:
        7 of them and filesize < 57344
}