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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_SUSP_Appdomaininjection_Keyword_May26

Detects link files, archives and binaries that contain keywords related to AppDomain hijacking/injection a technique used by malware to sideload payloads.

Suspicious / huntingSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
Jonathan Peters (Nextron Systems)
Date
2026-05-27
Modified
2026-06-01
Score / Quality
70 / 85

What this rule detects

Detects link files, archives and binaries that contain keywords related to AppDomain hijacking/injection a technique used by malware to sideload payloads.

Targets: Windows PE.

It defines 2 patterns (2 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
susp-appdomaininjection-keyword-may26.yarDetection Rule License 1.1
rule SIGNATURE_BASE_SUSP_Appdomaininjection_Keyword_May26 : FILE
{
	meta:
		description = "Detects link files, archives and binaries that contain keywords related to AppDomain hijacking/injection a technique used by malware to sideload payloads."
		author = "Jonathan Peters (Nextron Systems)"
		id = "c2d6b09f-594c-5308-9b67-9f0995518662"
		date = "2026-05-27"
		modified = "2026-06-01"
		reference = "https://attack.mitre.org/techniques/T1574/014/"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/susp_generic_rules_may26.yar#L1-L20"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		hash = "eee657ffdb2af8ed6412221e7d5fbf4f5742f2ac2c88f43f12db46af0697de71"
		logic_hash = "a2a46b4f868235bf7f90c4e037a735cc670586f1f37aa4fe385ba4ded094848e"
		score = 70
		quality = 85
		tags = "FILE"

	strings:
		$x1 = "AppDomainInjection" ascii wide fullword
		$x2 = "AppDomainHijack" ascii wide fullword

	condition:
		( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x4b50 or uint32( 0x8000 ) == 0x30444301 or uint16( 0 ) == 0x004c and uint32( 4 ) == 0x00021401 ) and 1 of ( $x* )
}

Strings (2 patterns)

IdentifierTypeValueModifiers
$x1text"AppDomainInjection"ascii wide fullword
$x2text"AppDomainHijack"ascii wide fullword

Condition

( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x4b50 or uint32( 0x8000 ) == 0x30444301 or uint16( 0 ) == 0x004c and uint32( 4 ) == 0x00021401 ) and 1 of ( $x* )

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • The file must start with “PK” — a ZIP archive (also Office Open XML, JAR, APK).
  • At least 1 patterns in ( $x* ) must match.

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

References

Sample hashes

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

  • eee657ffdb2af8ed6412221e7d5fbf4f5742f2ac2c88f43f12db46af0697de71

Licence & attribution

Author: Jonathan Peters (Nextron Systems)

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: c2d6b09f-594c-5308-9b67-9f0995518662

Tags:FILE

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