Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Himera_Loader_Auto

autogenerated rule brought to you by yara-signator

MalwareHimera LoaderMalpedia 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: Himera Loader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-himera-loader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Himera_Loader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "aaafc79e-21a9-5fbe-be05-950c921e16fb"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.himera_loader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.himera_loader_auto.yar#L1-L121"
		license_url = "N/A"
		logic_hash = "c95cedbeeb5f742b1056f8097a9a669c5e53ab6bc28c56f35234b991823260d7"
		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 = { 6a44 6a00 8d858482ffff 50 e8???????? 83c40c 33c9 }
		$sequence_1 = { c645eb42 c645ec2e 64a12c000000 8b08 8b15???????? 3b9104000000 }
		$sequence_2 = { c645e841 c645e940 c645ea00 c645eb4b c645ec56 }
		$sequence_3 = { 8b4df0 8b048500a14200 807c012800 7d5d 8d45d8 50 }
		$sequence_4 = { 3d75e7111a 750e 8b45e8 50 }
		$sequence_5 = { 8b048d00a14200 33c9 41 897df0 894de0 8a543828 }
		$sequence_6 = { c745e4503f4200 eb10 c745e4583f4200 eb07 c745e4443f4200 8b4508 8bcf }
		$sequence_7 = { c1e200 8b4508 0fb70c10 51 e8???????? 83c408 8b55fc }
		$sequence_8 = { e8???????? 83c410 ebb2 8b953482ffff 52 }
		$sequence_9 = { 8d8d6c82ffff e8???????? 8bc8 e8???????? }

	condition:
		7 of them and filesize < 385024
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 6a44 6a00 8d858482ffff 50 e8???????? 83c40c 33c9 }
$sequence_1hex{ c645eb42 c645ec2e 64a12c000000 8b08 8b15???????? 3b9104000000 }
$sequence_2hex{ c645e841 c645e940 c645ea00 c645eb4b c645ec56 }
$sequence_3hex{ 8b4df0 8b048500a14200 807c012800 7d5d 8d45d8 50 }
$sequence_4hex{ 3d75e7111a 750e 8b45e8 50 }
$sequence_5hex{ 8b048d00a14200 33c9 41 897df0 894de0 8a543828 }
$sequence_6hex{ c745e4503f4200 eb10 c745e4583f4200 eb07 c745e4443f4200 8b4508 8bcf }
$sequence_7hex{ c1e200 8b4508 0fb70c10 51 e8???????? 83c408 8b55fc }
$sequence_8hex{ e8???????? 83c410 ebb2 8b953482ffff 52 }
$sequence_9hex{ 8d8d6c82ffff e8???????? 8bc8 e8???????? }

Condition

7 of them and filesize < 385024

In plain words (Heuristic)

  • The file must be smaller than 385024 (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: aaafc79e-21a9-5fbe-be05-950c921e16fb

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