rule win_tinymet_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 741d 48 7416 68???????? e8???????? c70424???????? e9???????? }
            // n = 7, score = 100
            //   741d                 | je                  0x1f
            //   48                   | dec                 eax
            //   7416                 | je                  0x18
            //   68????????           |                     
            //   e8????????           |                     
            //   c70424????????       |                     
            //   e9????????           |                     

        $sequence_1 = { 8bec ff15???????? 50 ff7508 }
            // n = 4, score = 100
            //   8bec                 | mov                 ebp, esp
            //   ff15????????         |                     
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_2 = { 57 885df0 895df1 885de8 895de9 885ded }
            // n = 6, score = 100
            //   57                   | push                edi
            //   885df0               | mov                 byte ptr [ebp - 0x10], bl
            //   895df1               | mov                 dword ptr [ebp - 0xf], ebx
            //   885de8               | mov                 byte ptr [ebp - 0x18], bl
            //   895de9               | mov                 dword ptr [ebp - 0x17], ebx
            //   885ded               | mov                 byte ptr [ebp - 0x13], bl

        $sequence_3 = { 6800100000 83c005 50 6a00 ff15???????? a3???????? 6a04 }
            // n = 7, score = 100
            //   6800100000           | push                0x1000
            //   83c005               | add                 eax, 5
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff15????????         |                     
            //   a3????????           |                     
            //   6a04                 | push                4

        $sequence_4 = { 75df 8bc7 5f 5e 5b 8be5 5d }
            // n = 7, score = 100
            //   75df                 | jne                 0xffffffe1
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   8be5                 | mov                 esp, ebp
            //   5d                   | pop                 ebp

        $sequence_5 = { 668907 e8???????? 83c702 a3???????? 6a5f 57 }
            // n = 6, score = 100
            //   668907               | mov                 word ptr [edi], ax
            //   e8????????           |                     
            //   83c702               | add                 edi, 2
            //   a3????????           |                     
            //   6a5f                 | push                0x5f
            //   57                   | push                edi

        $sequence_6 = { ff35???????? ff35???????? e8???????? 83c40c a3???????? ffd0 6a00 }
            // n = 7, score = 100
            //   ff35????????         |                     
            //   ff35????????         |                     
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   a3????????           |                     
            //   ffd0                 | call                eax
            //   6a00                 | push                0

        $sequence_7 = { 8d45e8 50 e8???????? 83c410 b80033a084 }
            // n = 5, score = 100
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c410               | add                 esp, 0x10
            //   b80033a084           | mov                 eax, 0x84a03300

    condition:
        7 of them and filesize < 57344
}