SYMBOLCOMMON_NAMEaka. SYNONYMS
win.powershellrunner (Back to overview)

PowerShellRunner

Actor(s): Turla Group


There is no description at this point.

References
2019-05-29ESET ResearchMatthieu Faou, Romain Dumont
@online{faou:20190529:dive:3afd32e, author = {Matthieu Faou and Romain Dumont}, title = {{A dive into Turla PowerShell usage}}, date = {2019-05-29}, organization = {ESET Research}, url = {https://www.welivesecurity.com/2019/05/29/turla-powershell-usage/}, language = {English}, urldate = {2019-11-14} } A dive into Turla PowerShell usage
PowerShellRunner TurlaRPC
2019-04-13GitHubVitali Kremez
@online{kremez:20190413:decoded:c9b46a9, author = {Vitali Kremez}, title = {{Decoded Turla Powershell Implant}}, date = {2019-04-13}, organization = {GitHub}, url = {https://raw.githubusercontent.com/k-vitali/Malware-Misc-RE/master/2019-04-13-Possible-Turla-PowerShell-Implant.ps1}, language = {English}, urldate = {2019-07-11} } Decoded Turla Powershell Implant
PowerShellRunner
Yara Rules
[TLP:WHITE] win_powershellrunner_auto (20221125 | Detects win.powershellrunner.)
rule win_powershellrunner_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.powershellrunner."
        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.powershellrunner"
        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 = { c644245174 c644245220 c644245366 c64424546f c644245575 c64424566e }
            // n = 6, score = 200
            //   c644245174           | lea                 ecx, [esp + 0x70]
            //   c644245220           | dec                 eax
            //   c644245366           | mov                 edx, dword ptr [esp + 0x48]
            //   c64424546f           | dec                 eax
            //   c644245575           | mov                 ecx, dword ptr [esp + 0x90]
            //   c64424566e           | dec                 eax

        $sequence_1 = { c705????????090400c0 c705????????01000000 c705????????01000000 b808000000 486bc000 488d0dda450200 8b542430 }
            // n = 7, score = 200
            //   c705????????090400c0     |     
            //   c705????????01000000     |     
            //   c705????????01000000     |     
            //   b808000000           | dec                 eax
            //   486bc000             | mov                 ecx, dword ptr [esp + 0x60]
            //   488d0dda450200       | dec                 eax
            //   8b542430             | mov                 dword ptr [esp + 0x30], eax

        $sequence_2 = { 488d15dab40000 e8???????? 8bcb 4885c0 740c 4883c420 5b }
            // n = 7, score = 200
            //   488d15dab40000       | je                  0x1f37
            //   e8????????           |                     
            //   8bcb                 | dec                 esp
            //   4885c0               | mov                 eax, dword ptr [esp + 0x28]
            //   740c                 | dec                 eax
            //   4883c420             | mov                 dword ptr [esp + 0x28], eax
            //   5b                   | dec                 eax

        $sequence_3 = { 488b442430 488b00 488b4c2438 488d0488 488b4c2430 488901 }
            // n = 6, score = 200
            //   488b442430           | mov                 byte ptr [esp + 0xdb], 0x57
            //   488b00               | mov                 byte ptr [esp + 0x2d7], 6
            //   488b4c2438           | mov                 byte ptr [esp + 0x2d8], 0x30
            //   488d0488             | mov                 byte ptr [esp + 0x2d9], 0x21
            //   488b4c2430           | mov                 byte ptr [esp + 0x2da], 0x16
            //   488901               | mov                 byte ptr [esp + 0x2db], 0x34

        $sequence_4 = { b867000000 66898424f4010000 b828000000 66898424f6010000 b824000000 66898424f8010000 }
            // n = 6, score = 200
            //   b867000000           | dec                 eax
            //   66898424f4010000     | mov                 ecx, dword ptr [esp + 0x78]
            //   b828000000           | dec                 eax
            //   66898424f6010000     | lea                 eax, [eax + ecx*4]
            //   b824000000           | dec                 eax
            //   66898424f8010000     | mov                 dword ptr [esp + 0x40], eax

        $sequence_5 = { 4883bc243001000000 744e 488b842438010000 48898424c0000000 48c7442438ffffffff 48ff442438 488b8424c0000000 }
            // n = 7, score = 200
            //   4883bc243001000000     | lea    eax, [eax + ecx*4 - 4]
            //   744e                 | dec                 eax
            //   488b842438010000     | mov                 ecx, eax
            //   48898424c0000000     | jne                 0x4bd
            //   48c7442438ffffffff     | dec    eax
            //   48ff442438           | lea                 ecx, [esp + 0x60]
            //   488b8424c0000000     | dec                 eax

        $sequence_6 = { 48ffc8 48d1f8 4889442420 eb10 488b442448 48ffc8 48d1f8 }
            // n = 7, score = 200
            //   48ffc8               | cmp                 eax, esp
            //   48d1f8               | je                  0x352
            //   4889442420           | mov                 esi, dword ptr [ebp]
            //   eb10                 | dec                 ecx
            //   488b442448           | mov                 ebx, dword ptr [esi + esi*8 + 0x31d90]
            //   48ffc8               | dec                 eax
            //   48d1f8               | test                ebx, ebx

        $sequence_7 = { e8???????? 4533c0 33d2 b904000000 e8???????? eb10 4533c0 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   4533c0               | mov                 ecx, dword ptr [eax]
            //   33d2                 | dec                 eax
            //   b904000000           | mov                 ecx, dword ptr [esp + 0x20]
            //   e8????????           |                     
            //   eb10                 | xor                 eax, eax
            //   4533c0               | dec                 eax

        $sequence_8 = { e8???????? 4889442428 488d4c2458 e8???????? 4889442430 0fb64c2468 e8???????? }
            // n = 7, score = 200
            //   e8????????           |                     
            //   4889442428           | dec                 eax
            //   488d4c2458           | mov                 eax, dword ptr [esp + 0x28]
            //   e8????????           |                     
            //   4889442430           | dec                 eax
            //   0fb64c2468           | mov                 dword ptr [eax + 0x10], 0
            //   e8????????           |                     

        $sequence_9 = { 488d942458020000 488b4c2420 ff942428030000 488b8c2430030000 488981f0000000 488d9424b8010000 488b4c2420 }
            // n = 7, score = 200
            //   488d942458020000     | lea                 edx, [0x22bba]
            //   488b4c2420           | mov                 ecx, eax
            //   ff942428030000       | mov                 dword ptr [esp + 0x20], eax
            //   488b8c2430030000     | dec                 eax
            //   488981f0000000       | cmp                 dword ptr [esp + 0x130], 0
            //   488d9424b8010000     | je                  0x132d
            //   488b4c2420           | inc                 esp

    condition:
        7 of them and filesize < 458752
}
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