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YARA · Volexity threat-intel

VOLEXITY_Apt_Malware_Win_Lightspy_Orchestrator_Decoded_Core

Detects the decoded orchestrator for the Windows variant of the LightSpy malware family. This file is normally stored in an encoded state on the C2 server and is used as the core component of this malware family, loading additional plugins from the C2 whilst managing all the C2 communication etc.

APT / AkteurVolexity threat-intelBSD 2-Clause LicenseKompiliert mit YARA-X
Autor
threatintel@volexity.com
Datum
2024-02-15
Geändert
2024-07-03
Score / Qualität
75 / 78

Was diese Regel erkennt

Detects the decoded orchestrator for the Windows variant of the LightSpy malware family. This file is normally stored in an encoded state on the C2 server and is used as the core component of this malware family, loading additional plugins from the C2 whilst managing all the C2 communication etc.

Sie definiert 21 Muster (21 Text, 0 Hex, 0 Regex).

Zusammenfassung aus den Metadaten und der Bedingung der Regel erzeugt.

Regelquelltext

apt-malware-win-lightspy-orchestrator-decoded-core.yarBSD 2-Clause License
rule VOLEXITY_Apt_Malware_Win_Lightspy_Orchestrator_Decoded_Core : BRAZENBAMBOO FILE MEMORY
{
	meta:
		description = "Detects the decoded orchestrator for the Windows variant of the LightSpy malware family. This file is normally stored in an encoded state on the C2 server and is used as the core component of this malware family, loading additional plugins from the C2 whilst managing all the C2 communication etc."
		author = "threatintel@volexity.com"
		id = "44f8d7a4-7f48-5960-91a7-baf475f7d291"
		date = "2024-02-15"
		modified = "2024-07-03"
		reference = "https://github.com/volexity/threat-intel"
		source_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/2024/2024-11-15 BrazenBamboo/rules.yar#L244-L287"
		license_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/LICENSE.txt"
		hash = "80c0cdb1db961c76de7e4efb6aced8a52cd0e34178660ef34c128be5f0d587df"
		logic_hash = "f0189c0a84c53e365130e9683f2f2b2f73c14412d8e4d0251a4780d0e80162d8"
		score = 75
		quality = 78
		tags = "BRAZENBAMBOO, FILE, MEMORY"
		os = "win"
		os_arch = "all"
		scan_context = "file,memory"
		severity = "critical"
		license = "See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt"
		rule_id = 10246
		version = 2

	strings:
		$s1 = "Enter RunWork......."
		$s2 = "it's running......."
		$s3 = "select ret = socket_error."
		$s4 = "%s\\\\account.bin"
		$s5 = "[CtrlLink]: get machine sn err:%d"
		$s6 = "wmic path Win32_VideoController get CurrentHorizontalResolution,CurrentVerticalResolution /format:list | findstr /v \\\"^$\\\""
		$s7 = "wmic csproduct get vendor,version /format:list | findstr /v \\\"^$\\\""
		$s8 = "local ip get sockname error=%d"
		$s9 = "connect goole dns error=%d"
		$s10 = "%s/api/terminal/upsert/"
		$s11 = "/963852741/windows/plugin/manifest"
		$s12 = "Hello deepdata."
		$s13 = "Start Light."
		$s14 = "InitialPluginManager Error."
		$s15 = "InitialCommandExe Error."
		$s16 = "ws open, and send logon info."
		$s17 = "plugin_replay_handler"
		$s18 = "light_x86.dll"
		$pdb1 = "\\light\\bin\\light_x86.pdb"
		$pdb2 = "\\light\\bin\\plugin"
		$pdb3 = "D:\\tmpWork\\"

	condition:
		1 of ( $pdb* ) or 5 of ( $s* )
}

Strings (21 Muster)

BezeichnerTypWertModifikatoren
$s1Text"Enter RunWork......."
$s2Text"it's running......."
$s3Text"select ret = socket_error."
$s4Text"%s\\\\account.bin"
$s5Text"[CtrlLink]: get machine sn err:%d"
$s6Text"wmic path Win32_VideoController get CurrentHorizontalResolution,CurrentVerticalResolution /format:list | findstr /v \\\"^$\\\""
$s7Text"wmic csproduct get vendor,version /format:list | findstr /v \\\"^$\\\""
$s8Text"local ip get sockname error=%d"
$s9Text"connect goole dns error=%d"
$s10Text"%s/api/terminal/upsert/"
$s11Text"/963852741/windows/plugin/manifest"
$s12Text"Hello deepdata."
$s13Text"Start Light."
$s14Text"InitialPluginManager Error."
$s15Text"InitialCommandExe Error."
$s16Text"ws open, and send logon info."
$s17Text"plugin_replay_handler"
$s18Text"light_x86.dll"
$pdb1Text"\\light\\bin\\light_x86.pdb"
$pdb2Text"\\light\\bin\\plugin"
$pdb3Text"D:\\tmpWork\\"

Bedingung

1 of ( $pdb* ) or 5 of ( $s* )

In Worten (Heuristik)

  • Mindestens 1 Muster aus ( $pdb* ) müssen treffen.
  • Mindestens 5 Muster aus ( $s* ) müssen treffen.

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Referenzen

Proben-Hashes

Hashes der Proben, die der Autor in den Metadaten der Regel nennt (in Ihrer Threat-Intelligence-Plattform nachschlagen).

  • 80c0cdb1db961c76de7e4efb6aced8a52cd0e34178660ef34c128be5f0d587df

Lizenz & Namensnennung

Autor: threatintel@volexity.com

Quell-Repository: Volexity threat-intel @ 3a9d0b5245

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

“See license at https://github.com/volexity/threat-intel/blob/main/LICENSE.txt”

Copyright-Hinweis: Copyright 2022 by Volexity, Inc.

Originalregel

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

Regel-ID: 44f8d7a4-7f48-5960-91a7-baf475f7d291

Metadaten

oswin
os_archall
scan_contextfile,memory
severitycritical
rule_id10246
version2

Tags:BRAZENBAMBOOFILEMEMORY