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ESET_IIS_Group14

Detects Group 14 native IIS malware family

MalwareESET malware-iocBSD 2-Clause LicenseKompiliert mit YARA-X
Autor
ESET Research
Datum
2021-08-04
Score / Qualität
75 / 80

Was diese Regel erkennt

Detects Group 14 native IIS malware family

Sie definiert 10 Muster (10 Text, 0 Hex, 0 Regex). Verwendete YARA-Module: pe.

Zusammenfassung aus den Metadaten und der Bedingung der Regel erzeugt.

Regelquelltext

.yar herunterladen

Enthält die Imports und 1 Regel(n), von denen sie abhängt, die zum eigenständigen Kompilieren nötig sind.

iis-group14.yarBSD 2-Clause License
import "pe"

private rule ESET_IIS_Native_Module_PRIVATE : FILE
{
	meta:
		description = "Signature to match an IIS native module (clean or malicious)"
		author = "ESET Research"
		id = "e3bacdc8-fde1-5e83-ac94-79fc345e888d"
		date = "2021-08-04"
		modified = "2021-08-04"
		reference = "https://github.com/eset/malware-ioc/"
		source_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/badiis/badiis.yar#L34-L92"
		license_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/LICENSE"
		logic_hash = "5a388dc3253df606e2648d1f9c018e6dde373bbddce66dba69b7aecdd95bac18"
		score = 75
		quality = 55
		tags = "FILE"
		license = "BSD 2-Clause"
		version = "1"

	strings:
		$e1 = "This module subscribed to event"
		$e2 = "CHttpModule::OnBeginRequest"
		$e3 = "CHttpModule::OnPostBeginRequest"
		$e4 = "CHttpModule::OnAuthenticateRequest"
		$e5 = "CHttpModule::OnPostAuthenticateRequest"
		$e6 = "CHttpModule::OnAuthorizeRequest"
		$e7 = "CHttpModule::OnPostAuthorizeRequest"
		$e8 = "CHttpModule::OnResolveRequestCache"
		$e9 = "CHttpModule::OnPostResolveRequestCache"
		$e10 = "CHttpModule::OnMapRequestHandler"
		$e11 = "CHttpModule::OnPostMapRequestHandler"
		$e12 = "CHttpModule::OnAcquireRequestState"
		$e13 = "CHttpModule::OnPostAcquireRequestState"
		$e14 = "CHttpModule::OnPreExecuteRequestHandler"
		$e15 = "CHttpModule::OnPostPreExecuteRequestHandler"
		$e16 = "CHttpModule::OnExecuteRequestHandler"
		$e17 = "CHttpModule::OnPostExecuteRequestHandler"
		$e18 = "CHttpModule::OnReleaseRequestState"
		$e19 = "CHttpModule::OnPostReleaseRequestState"
		$e20 = "CHttpModule::OnUpdateRequestCache"
		$e21 = "CHttpModule::OnPostUpdateRequestCache"
		$e22 = "CHttpModule::OnLogRequest"
		$e23 = "CHttpModule::OnPostLogRequest"
		$e24 = "CHttpModule::OnEndRequest"
		$e25 = "CHttpModule::OnPostEndRequest"
		$e26 = "CHttpModule::OnSendResponse"
		$e27 = "CHttpModule::OnMapPath"
		$e28 = "CHttpModule::OnReadEntity"
		$e29 = "CHttpModule::OnCustomRequestNotification"
		$e30 = "CHttpModule::OnAsyncCompletion"
		$e31 = "CGlobalModule::OnGlobalStopListening"
		$e32 = "CGlobalModule::OnGlobalCacheCleanup"
		$e33 = "CGlobalModule::OnGlobalCacheOperation"
		$e34 = "CGlobalModule::OnGlobalHealthCheck"
		$e35 = "CGlobalModule::OnGlobalConfigurationChange"
		$e36 = "CGlobalModule::OnGlobalFileChange"
		$e37 = "CGlobalModule::OnGlobalApplicationStart"
		$e38 = "CGlobalModule::OnGlobalApplicationResolveModules"
		$e39 = "CGlobalModule::OnGlobalApplicationStop"
		$e40 = "CGlobalModule::OnGlobalRSCAQuery"
		$e41 = "CGlobalModule::OnGlobalTraceEvent"
		$e42 = "CGlobalModule::OnGlobalCustomNotification"
		$e43 = "CGlobalModule::OnGlobalThreadCleanup"
		$e44 = "CGlobalModule::OnGlobalApplicationPreload"

	condition:
		uint16( 0 ) == 0x5A4D and pe.exports ( "RegisterModule" ) and any of ( $e* )
}

rule ESET_IIS_Group14
{
	meta:
		description = "Detects Group 14 native IIS malware family"
		author = "ESET Research"
		id = "c773b09e-9f24-5e75-ba80-4be69af70b06"
		date = "2021-08-04"
		modified = "2021-08-04"
		reference = "https://github.com/eset/malware-ioc/"
		source_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/badiis/badiis.yar#L525-L552"
		license_url = "https://github.com/eset/malware-ioc/blob/17baf44964a77368e9149f4f593eb098beddf1c5/LICENSE"
		logic_hash = "ef10a4dfb1a9164533677416a7c9ada715ce10bfc1e5f92b56cf54bd890d4575"
		score = 75
		quality = 80
		tags = ""
		license = "BSD 2-Clause"
		version = "1"

	strings:
		$i1 = "agent-self: %s"
		$i2 = "/utf.php?key="
		$i3 = "/self.php?v="
		$i4 = "<script type=\"text/javascript\" src=\"//speed.wlaspsd.co"
		$i5 = "now.asmkpo.co"
		$s1 = "Baiduspider"
		$s2 = "360Spider"
		$s3 = "Sogou"
		$s4 = "YisouSpider"
		$s6 = "HTTP_X_FORWARDED_FOR"

	condition:
		ESET_IIS_Native_Module_PRIVATE and 2 of ( $i* ) or 5 of them
}

Strings (10 Muster)

BezeichnerTypWertModifikatoren
$i1Text"agent-self: %s"
$i2Text"/utf.php?key="
$i3Text"/self.php?v="
$i4Text"<script type=\"text/javascript\" src=\"//speed.wlaspsd.co"
$i5Text"now.asmkpo.co"
$s1Text"Baiduspider"
$s2Text"360Spider"
$s3Text"Sogou"
$s4Text"YisouSpider"
$s6Text"HTTP_X_FORWARDED_FOR"

Bedingung

ESET_IIS_Native_Module_PRIVATE and 2 of ( $i* ) or 5 of them

In Worten (Heuristik)

  • Mindestens 2 Muster aus ( $i* ) müssen treffen.
  • Mindestens 5 Muster aus der Regel müssen treffen.
  • Hängt von der Regel ESET_IIS_Native_Module_PRIVATE ab.

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Referenzen

Lizenz & Namensnennung

Autor: ESET Research

Quell-Repository: ESET malware-ioc @ 17baf44964

Lizenz: BSD 2-Clause License (in den Metadaten der Regel angegeben)

“BSD 2-Clause”

Copyright-Hinweis: Copyright (c) 2014-2018 ESET spol. s r.o.

Originalregel

Gespiegelt über YARA Forge 20260927, das Regelnamen mit der Quelle präfixiert und normalisierte Meta-Felder ergänzt.

Regel-ID: c773b09e-9f24-5e75-ba80-4be69af70b06

Metadaten

version1

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