rule win_mpkbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "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 = { 8b45f8 8d55ec 52 8d55fc 52 6a01 6aff }
            // n = 7, score = 400
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   8d55ec               | lea                 edx, [ebp - 0x14]
            //   52                   | push                edx
            //   8d55fc               | lea                 edx, [ebp - 4]
            //   52                   | push                edx
            //   6a01                 | push                1
            //   6aff                 | push                -1

        $sequence_1 = { a3???????? ffd0 5d c3 }
            // n = 4, score = 400
            //   a3????????           |                     
            //   ffd0                 | call                eax
            //   5d                   | pop                 ebp
            //   c3                   | ret                 

        $sequence_2 = { 50 ff15???????? a3???????? 8d45fc 50 683f000f00 6a00 }
            // n = 7, score = 400
            //   50                   | push                eax
            //   ff15????????         |                     
            //   a3????????           |                     
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   683f000f00           | push                0xf003f
            //   6a00                 | push                0

        $sequence_3 = { 53 ff35???????? 8b1d???????? ffd3 6a00 }
            // n = 5, score = 400
            //   53                   | push                ebx
            //   ff35????????         |                     
            //   8b1d????????         |                     
            //   ffd3                 | call                ebx
            //   6a00                 | push                0

        $sequence_4 = { 895010 895014 894818 89481c 895020 895024 5d }
            // n = 7, score = 400
            //   895010               | mov                 dword ptr [eax + 0x10], edx
            //   895014               | mov                 dword ptr [eax + 0x14], edx
            //   894818               | mov                 dword ptr [eax + 0x18], ecx
            //   89481c               | mov                 dword ptr [eax + 0x1c], ecx
            //   895020               | mov                 dword ptr [eax + 0x20], edx
            //   895024               | mov                 dword ptr [eax + 0x24], edx
            //   5d                   | pop                 ebp

        $sequence_5 = { 33d2 c70028000000 895010 895014 894818 }
            // n = 5, score = 400
            //   33d2                 | xor                 edx, edx
            //   c70028000000         | mov                 dword ptr [eax], 0x28
            //   895010               | mov                 dword ptr [eax + 0x10], edx
            //   895014               | mov                 dword ptr [eax + 0x14], edx
            //   894818               | mov                 dword ptr [eax + 0x18], ecx

        $sequence_6 = { 53 ff75f8 56 ff15???????? 8bd8 3bde 7507 }
            // n = 7, score = 400
            //   53                   | push                ebx
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   3bde                 | cmp                 ebx, esi
            //   7507                 | jne                 9

        $sequence_7 = { 6a01 6aff 8975fc 8b08 }
            // n = 4, score = 400
            //   6a01                 | push                1
            //   6aff                 | push                -1
            //   8975fc               | mov                 dword ptr [ebp - 4], esi
            //   8b08                 | mov                 ecx, dword ptr [eax]

        $sequence_8 = { ff75f8 56 ff15???????? 8bd8 3bde }
            // n = 5, score = 400
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax
            //   3bde                 | cmp                 ebx, esi

        $sequence_9 = { e8???????? 46 81feff000000 7cd9 6a01 }
            // n = 5, score = 400
            //   e8????????           |                     
            //   46                   | inc                 esi
            //   81feff000000         | cmp                 esi, 0xff
            //   7cd9                 | jl                  0xffffffdb
            //   6a01                 | push                1

    condition:
        7 of them and filesize < 139264
}