rule win_mpkbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.mpkbot."
        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.mpkbot"
        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 = { 68???????? 895e08 ffd7 6a00 53 }
            // n = 5, score = 400
            //   68????????           |                     
            //   895e08               | mov                 dword ptr [esi + 8], ebx
            //   ffd7                 | call                edi
            //   6a00                 | push                0
            //   53                   | push                ebx

        $sequence_1 = { ffd0 5d c3 68???????? }
            // n = 4, score = 400
            //   ffd0                 | call                eax
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   68????????           |                     

        $sequence_2 = { e8???????? 46 81feff000000 7cd9 6a01 ff15???????? ebcc }
            // n = 7, score = 400
            //   e8????????           |                     
            //   46                   | inc                 esi
            //   81feff000000         | cmp                 esi, 0xff
            //   7cd9                 | jl                  0xffffffdb
            //   6a01                 | push                1
            //   ff15????????         |                     
            //   ebcc                 | jmp                 0xffffffce

        $sequence_3 = { 50 ffd6 85c0 7fdf 5e }
            // n = 5, score = 400
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   85c0                 | test                eax, eax
            //   7fdf                 | jg                  0xffffffe1
            //   5e                   | pop                 esi

        $sequence_4 = { 895020 895024 5d c3 55 8bec }
            // n = 6, score = 400
            //   895020               | mov                 dword ptr [eax + 0x20], edx
            //   895024               | mov                 dword ptr [eax + 0x24], edx
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_5 = { 8975f0 ff15???????? 8b45f0 8d55f4 52 56 56 }
            // n = 7, score = 400
            //   8975f0               | mov                 dword ptr [ebp - 0x10], esi
            //   ff15????????         |                     
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]
            //   8d55f4               | lea                 edx, dword ptr [ebp - 0xc]
            //   52                   | push                edx
            //   56                   | push                esi
            //   56                   | push                esi

        $sequence_6 = { 6a01 ff15???????? ebcc 55 8bec }
            // n = 5, score = 400
            //   6a01                 | push                1
            //   ff15????????         |                     
            //   ebcc                 | jmp                 0xffffffce
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp

        $sequence_7 = { 68???????? ff15???????? 68???????? 50 ff15???????? ff750c a3???????? }
            // n = 7, score = 400
            //   68????????           |                     
            //   ff15????????         |                     
            //   68????????           |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   a3????????           |                     

        $sequence_8 = { 50 ff15???????? 8b45fc 8b08 56 }
            // n = 5, score = 400
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   56                   | push                esi

        $sequence_9 = { ff15???????? b90180ffff 663bc1 750d 6a00 }
            // n = 5, score = 400
            //   ff15????????         |                     
            //   b90180ffff           | mov                 ecx, 0xffff8001
            //   663bc1               | cmp                 ax, cx
            //   750d                 | jne                 0xf
            //   6a00                 | push                0

    condition:
        7 of them and filesize < 139264
}