SYMBOLCOMMON_NAMEaka. SYNONYMS
win.mikoponi (Back to overview)

Mikoponi


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References
2016-04-14AnomaliAaron Shelmire
@online{shelmire:20160414:targeted:62c52fb, author = {Aaron Shelmire}, title = {{Targeted Ransomware Activity}}, date = {2016-04-14}, organization = {Anomali}, url = {https://www.anomali.com/blog/targeted-ransomware-activity}, language = {English}, urldate = {2019-12-06} } Targeted Ransomware Activity
Mikoponi
Yara Rules
[TLP:WHITE] win_mikoponi_auto (20221125 | Detects win.mikoponi.)
rule win_mikoponi_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.mikoponi."
        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.mikoponi"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 50 6800040000 51 ff15???????? 50 6a00 6800110000 }
            // n = 7, score = 100
            //   50                   | push                eax
            //   6800040000           | push                0x400
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6800110000           | push                0x1100

        $sequence_1 = { 8d542420 52 56 ff15???????? 8b1d???????? 6800001000 }
            // n = 6, score = 100
            //   8d542420             | lea                 edx, [esp + 0x20]
            //   52                   | push                edx
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8b1d????????         |                     
            //   6800001000           | push                0x100000

        $sequence_2 = { 83c002 e8???????? b907000000 66894808 ba9f000000 }
            // n = 5, score = 100
            //   83c002               | add                 eax, 2
            //   e8????????           |                     
            //   b907000000           | mov                 ecx, 7
            //   66894808             | mov                 word ptr [eax + 8], cx
            //   ba9f000000           | mov                 edx, 0x9f

        $sequence_3 = { c744244868054200 51 8b54246c 52 ff15???????? 8b1d???????? }
            // n = 6, score = 100
            //   c744244868054200     | mov                 dword ptr [esp + 0x48], 0x420568
            //   51                   | push                ecx
            //   8b54246c             | mov                 edx, dword ptr [esp + 0x6c]
            //   52                   | push                edx
            //   ff15????????         |                     
            //   8b1d????????         |                     

        $sequence_4 = { e8???????? 83f801 741f 8d442414 50 8d4c241c 51 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83f801               | cmp                 eax, 1
            //   741f                 | je                  0x21
            //   8d442414             | lea                 eax, [esp + 0x14]
            //   50                   | push                eax
            //   8d4c241c             | lea                 ecx, [esp + 0x1c]
            //   51                   | push                ecx

        $sequence_5 = { e8???????? 83c418 85c0 750a b801000000 5f 83c408 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c418               | add                 esp, 0x18
            //   85c0                 | test                eax, eax
            //   750a                 | jne                 0xc
            //   b801000000           | mov                 eax, 1
            //   5f                   | pop                 edi
            //   83c408               | add                 esp, 8

        $sequence_6 = { 6a01 6800000040 55 ff15???????? 8bd8 }
            // n = 5, score = 100
            //   6a01                 | push                1
            //   6800000040           | push                0x40000000
            //   55                   | push                ebp
            //   ff15????????         |                     
            //   8bd8                 | mov                 ebx, eax

        $sequence_7 = { 85c0 75e6 56 e8???????? 33db 83c404 33ed }
            // n = 7, score = 100
            //   85c0                 | test                eax, eax
            //   75e6                 | jne                 0xffffffe8
            //   56                   | push                esi
            //   e8????????           |                     
            //   33db                 | xor                 ebx, ebx
            //   83c404               | add                 esp, 4
            //   33ed                 | xor                 ebp, ebp

    condition:
        7 of them and filesize < 330752
}
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