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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_FE_APT_Trojan_PL_QUIETPULSE

Detects samples mentioned in PulseSecure report

APT / threat actorSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Mandiant
Date
2021-04-16
Modified
2023-12-05
Score / Quality
75 / 83

What this rule detects

Detects samples mentioned in PulseSecure report

It defines 6 patterns (0 text, 0 hex, 6 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
fe-apt-trojan-pl-quietpulse.yarDetection Rule License 1.1
rule SIGNATURE_BASE_FE_APT_Trojan_PL_QUIETPULSE
{
	meta:
		description = "Detects samples mentioned in PulseSecure report"
		author = "Mandiant"
		id = "4c49eef7-b8fa-55d5-8fb8-8964f6f50003"
		date = "2021-04-16"
		modified = "2023-12-05"
		reference = "https://www.fireeye.com/blog/threat-research/2021/04/suspected-apt-actors-leverage-bypass-techniques-pulse-secure-zero-day.html"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_pulsesecure.yar#L154-L172"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		hash = "00575bec8d74e221ff6248228c509a16"
		logic_hash = "226a56369e141834d4834400bbf1a006bbb6e9b39e16e24b0106bff1a9c202a9"
		score = 75
		quality = 83
		tags = ""

	strings:
		$s1 = /open[\x09\x20]{0,32}\(\*STDOUT[\x09\x20]{0,32},[\x09\x20]{0,32}[\x22\x27]>&CLIENT[\x22\x27]\)/
		$s2 = /open[\x09\x20]{0,32}\(\*STDERR[\x09\x20]{0,32},[\x09\x20]{0,32}[\x22\x27]>&CLIENT[\x22\x27]\)/
		$s3 = /socket[\x09\x20]{0,32}\(SERVER[\x09\x20]{0,32},[\x09\x20]{0,32}PF_UNIX[\x09\x20]{0,32},[\x09\x20]{0,32}SOCK_STREAM[\x09\x20]{0,32},[\x09\x20]{0,32}0[\x09\x20]{0,32}\)[\x09\x20]{0,32};\s{0,128}unlink/
		$s4 = /bind[\x09\x20]{0,32}\([\x09\x20]{0,32}SERVER[\x09\x20]{0,32},[\x09\x20]{0,32}sockaddr_un\(/
		$s5 = /listen[\x09\x20]{0,32}\([\x09\x20]{0,32}SERVER[\x09\x20]{0,32},[\x09\x20]{0,32}SOMAXCONN[\x09\x20]{0,32}\)[\x09\x20]{0,32};/
		$s6 = /my[\x09\x20]{1,32}\$\w{1,64}[\x09\x20]{0,32}=[\x09\x20]{0,32}fork\([\x09\x20]{0,32}\)[\x09\x20]{0,32};\s{1,128}if[\x09\x20]{0,32}\([\x09\x20]{0,32}\$\w{1,64}[\x09\x20]{0,32}==[\x09\x20]{0,32}0[\x09\x20]{0,32}\)[\x09\x20]{0,32}\{\s{1,128}exec\(/

	condition:
		all of them
}

Strings (6 patterns)

IdentifierTypeValueModifiers
$s1regex/open[\x09\x20]{0,32}\(\*STDOUT[\x09\x20]{0,32},[\x09\x20]{0,32}[\x22\x27]>&CLIENT[\x22\x27]\)/
$s2regex/open[\x09\x20]{0,32}\(\*STDERR[\x09\x20]{0,32},[\x09\x20]{0,32}[\x22\x27]>&CLIENT[\x22\x27]\)/
$s3regex/socket[\x09\x20]{0,32}\(SERVER[\x09\x20]{0,32},[\x09\x20]{0,32}PF_UNIX[\x09\x20]{0,32},[\x09\x20]{0,32}SOCK_STREAM[\x09\x20]{0,32},[\x09\x20]{0,32}0[\x09\x20]{ …
$s4regex/bind[\x09\x20]{0,32}\([\x09\x20]{0,32}SERVER[\x09\x20]{0,32},[\x09\x20]{0,32}sockaddr_un\(/
$s5regex/listen[\x09\x20]{0,32}\([\x09\x20]{0,32}SERVER[\x09\x20]{0,32},[\x09\x20]{0,32}SOMAXCONN[\x09\x20]{0,32}\)[\x09\x20]{0,32};/
$s6regex/my[\x09\x20]{1,32}\$\w{1,64}[\x09\x20]{0,32}=[\x09\x20]{0,32}fork\([\x09\x20]{0,32}\)[\x09\x20]{0,32};\s{1,128}if[\x09\x20]{0,32}\([\x09\x20]{0,32}\$\w{1,64}[\ …

Condition

all of them

In plain words (Heuristic)

  • All patterns in the rule must match.

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References

Sample hashes

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

  • 00575bec8d74e221ff6248228c509a16

Licence & attribution

Author: Mandiant

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

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

Rule id: 4c49eef7-b8fa-55d5-8fb8-8964f6f50003

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