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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_PHISH_Final_Payload_Feb25

Detects possible final payload of phishing-delivered malware, where embedded shellcode is used to decrypt and execute the payload after user-supplied password input.

MalwareSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
X__Junior
Date
2025-02-14
Modified
2025-03-20
Score / Quality
80 / 85

What this rule detects

Detects possible final payload of phishing-delivered malware, where embedded shellcode is used to decrypt and execute the payload after user-supplied password input.

It defines 7 patterns (7 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-phish-final-payload-feb25.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_PHISH_Final_Payload_Feb25
{
	meta:
		description = "Detects possible final payload of phishing-delivered malware, where embedded shellcode is used to decrypt and execute the payload after user-supplied password input."
		author = "X__Junior"
		id = "9014e1f2-09c2-5ba0-8b7c-6ae8c069d1f7"
		date = "2025-02-14"
		modified = "2025-03-20"
		reference = "https://x.com/dtcert/status/1890384162818802135"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/mal_phish_feb25.yar#L16-L35"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		hash = "de384aba6b0c6800095eb530954aa718d4ed96cccfc0b1e5e4d01404f3518a77"
		logic_hash = "3251d68a019d873987966d46c9e474e5a1ebbca4a33a8bf1e3c3ce119db8ab8c"
		score = 80
		quality = 85
		tags = ""

	strings:
		$s1 = "%lu: %s %s" wide
		$s2 = "(Direct Inbound)" wide
		$s3 = "(Primary Domain)" wide
		$s4 = "(Forest Tree Root" wide
		$s5 = "(Native Mode)" wide
		$s6 = "(In Forest)" wide
		$s7 = "(None)" wide

	condition:
		all of them
}

Strings (7 patterns)

IdentifierTypeValueModifiers
$s1text"%lu: %s %s"wide
$s2text"(Direct Inbound)"wide
$s3text"(Primary Domain)"wide
$s4text"(Forest Tree Root"wide
$s5text"(Native Mode)"wide
$s6text"(In Forest)"wide
$s7text"(None)"wide

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).

  • de384aba6b0c6800095eb530954aa718d4ed96cccfc0b1e5e4d01404f3518a77

Licence & attribution

Author: X__Junior

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: 9014e1f2-09c2-5ba0-8b7c-6ae8c069d1f7

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