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VOLEXITY_Apt_Malware_Win_Applejeus_B_Oct22

Detects unpacked AppleJeus samples.

APT / threat actorApplejeusVolexity threat-intelBSD 2-Clause LicenseCompiles with YARA-X
Author
threatintel@volexity.com
Date
2022-11-03
Modified
2025-05-21
Score / Quality
75 / 80

What this rule detects

Detects unpacked AppleJeus samples.

Associated malware family: Applejeus.

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

Summary generated from the rule's metadata and condition.

Rule source

apt-malware-win-applejeus-b-oct22.yarBSD 2-Clause License
rule VOLEXITY_Apt_Malware_Win_Applejeus_B_Oct22 : LAZYPINE FILE MEMORY
{
	meta:
		description = "Detects unpacked AppleJeus samples."
		author = "threatintel@volexity.com"
		id = "8586dc64-225b-5f28-a6d6-b9b6e8f1c815"
		date = "2022-11-03"
		modified = "2025-05-21"
		reference = "https://www.volexity.com/blog/2022/12/01/buyer-beware-fake-cryptocurrency-applications-serving-as-front-for-applejeus-malware/"
		source_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/2022/2022-12-01 Buyer Beware - Fake Cryptocurrency Applications Serving as Front for AppleJeus Malware/yara.yar#L24-L54"
		license_url = "https://github.com/volexity/threat-intel/blob/3a9d0b52459877ee866a9a0ba06e60059b778c77/LICENSE.txt"
		hash = "9352625b3e6a3c998e328e11ad43efb5602fe669aed9c9388af5f55fadfedc78"
		logic_hash = "76f3c9692ea96d3cadbbcad03477ab6c53445935352cb215152b9b5483666d43"
		score = 75
		quality = 80
		tags = "LAZYPINE, 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 = 8497
		version = 5

	strings:
		$key1 = "AppX7y4nbzq37zn4ks9k7amqjywdat7d"
		$key2 = "Gd2n5frvG2eZ1KOe"
		$str1 = "Windows %d(%d)-%s"
		$str2 = "&act=check"

	condition:
		( any of ( $key* ) and 1 of ( $str* ) ) or all of ( $str* )
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$key1text"AppX7y4nbzq37zn4ks9k7amqjywdat7d"
$key2text"Gd2n5frvG2eZ1KOe"
$str1text"Windows %d(%d)-%s"
$str2text"&act=check"

Condition

( any of ( $key* ) and 1 of ( $str* ) ) or all of ( $str* )

In plain words (Heuristic)

  • All patterns in ( $str* ) must match.
  • At least one pattern in ( $key* ) must match.
  • At least 1 patterns in ( $str* ) 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).

  • 9352625b3e6a3c998e328e11ad43efb5602fe669aed9c9388af5f55fadfedc78

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: 8586dc64-225b-5f28-a6d6-b9b6e8f1c815

Metadata

oswin
os_archall
scan_contextfile,memory
severitycritical
rule_id8497
version5

Tags:LAZYPINEFILEMEMORY

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