rule win_mpkbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mpkbot"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { ff7510 a3???????? ff750c ff7508 ffd0 5d }
            // n = 6, score = 400
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   a3????????           |                     
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ffd0                 | call                eax
            //   5d                   | pop                 ebp

        $sequence_1 = { 81feff000000 7cd9 6a01 ff15???????? ebcc 55 }
            // n = 6, score = 400
            //   81feff000000         | cmp                 esi, 0xff
            //   7cd9                 | jl                  0xffffffdb
            //   6a01                 | push                1
            //   ff15????????         |                     
            //   ebcc                 | jmp                 0xffffffce
            //   55                   | push                ebp

        $sequence_2 = { 807e1100 7604 c6461100 57 }
            // n = 4, score = 400
            //   807e1100             | cmp                 byte ptr [esi + 0x11], 0
            //   7604                 | jbe                 6
            //   c6461100             | mov                 byte ptr [esi + 0x11], 0
            //   57                   | push                edi

        $sequence_3 = { eb05 38450c 7503 33c0 40 5d c20800 }
            // n = 7, score = 400
            //   eb05                 | jmp                 7
            //   38450c               | cmp                 byte ptr [ebp + 0xc], al
            //   7503                 | jne                 5
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   5d                   | pop                 ebp
            //   c20800               | ret                 8

        $sequence_4 = { 8bf0 0fb7450c 50 0fb74508 50 }
            // n = 5, score = 400
            //   8bf0                 | mov                 esi, eax
            //   0fb7450c             | movzx               eax, word ptr [ebp + 0xc]
            //   50                   | push                eax
            //   0fb74508             | movzx               eax, word ptr [ebp + 8]
            //   50                   | push                eax

        $sequence_5 = { 384508 7507 38450c 740a eb05 }
            // n = 5, score = 400
            //   384508               | cmp                 byte ptr [ebp + 8], al
            //   7507                 | jne                 9
            //   38450c               | cmp                 byte ptr [ebp + 0xc], al
            //   740a                 | je                  0xc
            //   eb05                 | jmp                 7

        $sequence_6 = { ff15???????? e9???????? 6a12 ff15???????? }
            // n = 4, score = 400
            //   ff15????????         |                     
            //   e9????????           |                     
            //   6a12                 | push                0x12
            //   ff15????????         |                     

        $sequence_7 = { ff7510 a3???????? ff750c ff7508 ffd0 5d c3 }
            // n = 7, score = 400
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   a3????????           |                     
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ffd0                 | call                eax
            //   5d                   | pop                 ebp
            //   c3                   | ret                 

        $sequence_8 = { 7507 38450c 740a eb05 }
            // n = 4, score = 400
            //   7507                 | jne                 9
            //   38450c               | cmp                 byte ptr [ebp + 0xc], al
            //   740a                 | je                  0xc
            //   eb05                 | jmp                 7

        $sequence_9 = { c745d803000000 0fb630 8975d4 40 db45d4 }
            // n = 5, score = 400
            //   c745d803000000       | mov                 dword ptr [ebp - 0x28], 3
            //   0fb630               | movzx               esi, byte ptr [eax]
            //   8975d4               | mov                 dword ptr [ebp - 0x2c], esi
            //   40                   | inc                 eax
            //   db45d4               | fild                dword ptr [ebp - 0x2c]

    condition:
        7 of them and filesize < 139264
}