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VOLEXITY_Apt_Malware_Macos_Reloadext_Installer

Detect the RELOADEXT installer.

APT / threat actorVolexity threat-intelBSD 2-Clause LicenseCompiles with YARA-X
Author
threatintel@volexity.com
Date
2024-02-23
Modified
2024-08-02
Score / Quality
75 / 80

What this rule detects

Detect the RELOADEXT installer.

It defines 4 patterns (4 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

apt-malware-macos-reloadext-installer.yarBSD 2-Clause License
rule VOLEXITY_Apt_Malware_Macos_Reloadext_Installer : STORMBAMBOO FILE MEMORY
{
	meta:
		description = "Detect the RELOADEXT installer."
		author = "threatintel@volexity.com"
		id = "c65ea2b5-ab98-5693-92ea-05c0f1ea1e5b"
		date = "2024-02-23"
		modified = "2024-08-02"
		reference = "TIB-20240227"
		source_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/2024/2024-08-02 StormBamboo/rules.yar#L37-L62"
		license_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/LICENSE.txt"
		hash = "07e3b067dc5e5de377ce4a5eff3ccd4e6a2f1d7a47c23fe06b1ededa7aed1ab3"
		logic_hash = "8688796839202d95ded15e10262a7a7c7cbbae4a332b60305402e5984005d452"
		score = 75
		quality = 80
		tags = "STORMBAMBOO, FILE, MEMORY"
		os = "darwin"
		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 = 10281
		version = 2

	strings:
		$str1 = "/CustomPlug1n/"
		$str2 = "Chrome NOT installed."
		$str3 = "-f force kill Chrome"
		$str4 = "/*} &&cp -rf ${"

	condition:
		3 of them
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$str1text"/CustomPlug1n/"
$str2text"Chrome NOT installed."
$str3text"-f force kill Chrome"
$str4text"/*} &&cp -rf ${"

Condition

3 of them

In plain words (Heuristic)

  • At least 3 patterns in the rule must match.

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Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • 07e3b067dc5e5de377ce4a5eff3ccd4e6a2f1d7a47c23fe06b1ededa7aed1ab3

Licence & attribution

Author: threatintel@volexity.com

Source repository: Volexity threat-intel @ 3a9d0b5245

Licence: BSD 2-Clause License (stated in the rule's own meta)

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

Copyright notice: Copyright 2022 by Volexity, Inc.

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: c65ea2b5-ab98-5693-92ea-05c0f1ea1e5b

Metadata

osdarwin
os_archall
scan_contextfile,memory
severitycritical
rule_id10281
version2

Tags:STORMBAMBOOFILEMEMORY