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MALPEDIA_Win_Hazy_Load_Auto

autogenerated rule brought to you by yara-signator

MalwareHazy LoadMalpedia 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: Hazy Load.

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

Summary generated from the rule's metadata and condition.

Rule source

win-hazy-load-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Hazy_Load_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a350eaad-9bcb-5f5e-81a1-787050135b96"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.hazy_load"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.hazy_load_auto.yar#L1-L116"
		license_url = "N/A"
		logic_hash = "6dd70fa7df72f7c4ea5416ccf00a68d1eab60e78bafa0a38a25801f23d6cb5fb"
		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 = { 33c0 f04d0fb1bcf130100200 488bd8 740e }
		$sequence_1 = { 488945f0 488d1594c40000 b805000000 894520 894528 }
		$sequence_2 = { f00fc103 83f801 7516 488d05b5330100 488b4c2430 483bc8 7405 }
		$sequence_3 = { 488b442448 4883f8ff 74c8 488bd3 4c8d05ceed0000 83e23f }
		$sequence_4 = { 488d0d12c9ffff 4933f8 4a87bcf150100200 33c0 488b5c2450 488b6c2458 488b742460 }
		$sequence_5 = { 8d41ff 8b8482f89e0100 85c0 0f8489000000 }
		$sequence_6 = { 488d0d5beffeff 48c1e602 0fb784b9609e0100 488d9150950100 }
		$sequence_7 = { 448bc7 4863c3 488d5504 442bc3 }
		$sequence_8 = { 442bc3 4803d0 4533c9 488bce ff15???????? 85c0 0f8eacfeffff }
		$sequence_9 = { eb75 4c8bf3 488d3513be0100 488d2df4bd0100 }

	condition:
		7 of them and filesize < 315392
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 33c0 f04d0fb1bcf130100200 488bd8 740e }
$sequence_1hex{ 488945f0 488d1594c40000 b805000000 894520 894528 }
$sequence_2hex{ f00fc103 83f801 7516 488d05b5330100 488b4c2430 483bc8 7405 }
$sequence_3hex{ 488b442448 4883f8ff 74c8 488bd3 4c8d05ceed0000 83e23f }
$sequence_4hex{ 488d0d12c9ffff 4933f8 4a87bcf150100200 33c0 488b5c2450 488b6c2458 488b742460 }
$sequence_5hex{ 8d41ff 8b8482f89e0100 85c0 0f8489000000 }
$sequence_6hex{ 488d0d5beffeff 48c1e602 0fb784b9609e0100 488d9150950100 }
$sequence_7hex{ 448bc7 4863c3 488d5504 442bc3 }
$sequence_8hex{ 442bc3 4803d0 4533c9 488bce ff15???????? 85c0 0f8eacfeffff }
$sequence_9hex{ eb75 4c8bf3 488d3513be0100 488d2df4bd0100 }

Condition

7 of them and filesize < 315392

In plain words (Heuristic)

  • The file must be smaller than 315392 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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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: a350eaad-9bcb-5f5e-81a1-787050135b96

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