Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Ironhalo_Auto

autogenerated rule brought to you by yara-signator

MalwareIronhaloMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Ironhalo.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-ironhalo-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Ironhalo_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "ff81555d-b057-5dc8-9c08-d50d0e39fa8f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ironhalo"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.ironhalo_auto.yar#L1-L124"
		license_url = "N/A"
		logic_hash = "b3c3267632db8fb73771a0962aa4b065de65cdb802cf4cd8562b60f577e6d53b"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 75f5 8d0c49 5e 8d0c8df0c14000 }
		$sequence_1 = { 88442419 fec0 47 3c40 72f1 8a543102 32c0 }
		$sequence_2 = { 68???????? 50 e8???????? 8bf0 83c408 85f6 7502 }
		$sequence_3 = { fec0 47 3c40 72f1 8a5c3103 8a44241b }
		$sequence_4 = { 6689542430 e8???????? 56 e8???????? 8a44242c 83c41c }
		$sequence_5 = { 83c408 8944240c 85c0 7502 5e }
		$sequence_6 = { b9???????? 8bc2 8bf2 c1f805 83e61f 8b048560e04000 8b04f0 }
		$sequence_7 = { 51 e8???????? 83c408 8944240c 85c0 7502 5e }
		$sequence_8 = { 7504 88442419 fec0 47 }
		$sequence_9 = { 85f6 0f8426feffff 8b3d???????? c744241c01000000 8d4c241c 8d942430030000 51 }

	condition:
		7 of them and filesize < 131072
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 75f5 8d0c49 5e 8d0c8df0c14000 }
$sequence_1hex{ 88442419 fec0 47 3c40 72f1 8a543102 32c0 }
$sequence_2hex{ 68???????? 50 e8???????? 8bf0 83c408 85f6 7502 }
$sequence_3hex{ fec0 47 3c40 72f1 8a5c3103 8a44241b }
$sequence_4hex{ 6689542430 e8???????? 56 e8???????? 8a44242c 83c41c }
$sequence_5hex{ 83c408 8944240c 85c0 7502 5e }
$sequence_6hex{ b9???????? 8bc2 8bf2 c1f805 83e61f 8b048560e04000 8b04f0 }
$sequence_7hex{ 51 e8???????? 83c408 8944240c 85c0 7502 5e }
$sequence_8hex{ 7504 88442419 fec0 47 }
$sequence_9hex{ 85f6 0f8426feffff 8b3d???????? c744241c01000000 8d4c241c 8d942430030000 51 }

Condition

7 of them and filesize < 131072

In plain words (Heuristic)

  • The file must be smaller than 131072 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

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

Open in editor

References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: ff81555d-b057-5dc8-9c08-d50d0e39fa8f

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE