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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_PHISH_Shellcode_Enc_Payload_Feb25

Detects unknown of phishing-delivered malware

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 unknown of phishing-delivered malware

Targets: Windows PE.

It defines 1 patterns (0 text, 1 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-phish-shellcode-enc-payload-feb25.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_PHISH_Shellcode_Enc_Payload_Feb25 : FILE
{
	meta:
		description = "Detects unknown of phishing-delivered malware"
		author = "X__Junior"
		id = "8459c5ba-37ec-59bd-8d4a-5ab7b6bb4553"
		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#L1-L14"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		hash = "247e6a648bb22d35095ba02ef4af8cfe0a4cdfa25271117414ff2e3a21021886"
		logic_hash = "144323294a8353956adf7a9b2a316e1e7606e882f85b8187c016d5acdcc254cc"
		score = 80
		quality = 85
		tags = "FILE"

	strings:
		$op1 = { 48 89 EA FF D0 48 89 E9 4C 8D 4C 24 ?? 41 B8 ?? ?? ?? ?? 48 89 C7 48 89 C3 48 89 EA F3 A4 48 89 C1 41 FF D4 31 C9 FF D3}

	condition:
		uint16( 0 ) == 0x5a4d and $op1
}

Strings (1 patterns)

IdentifierTypeValueModifiers
$op1hex{ 48 89 EA FF D0 48 89 E9 4C 8D 4C 24 ?? 41 B8 ?? ?? ?? ?? 48 89 C7 48 89 C3 48 89 EA F3 A4 48 89 C1 41 FF D4 31 C9 FF D3}

Condition

uint16( 0 ) == 0x5a4d and $op1

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • Pattern $op1 must be present.

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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).

  • 247e6a648bb22d35095ba02ef4af8cfe0a4cdfa25271117414ff2e3a21021886

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: 8459c5ba-37ec-59bd-8d4a-5ab7b6bb4553

Tags:FILE

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