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MALPEDIA_Win_Urlzone_Auto

autogenerated rule brought to you by yara-signator

MalwareUrlzoneMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-01-05
Modified
2026-01-06
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Urlzone.

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

Summary generated from the rule's metadata and condition.

Rule source

win-urlzone-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Urlzone_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "4dd4d8e5-7756-57be-8ce5-a21c7832bb2c"
		date = "2026-01-05"
		modified = "2026-01-06"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.urlzone"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.urlzone_auto.yar#L1-L126"
		license_url = "N/A"
		logic_hash = "c42481bd862ad161fd4e6a711568aaf0139280c4a77d4d9855a08ac723543c9d"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260105"
		malpedia_hash = "19b79e7cab4eaf532122e5b45a77dd8f6bb5cc79"
		malpedia_version = "20251219"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 55 8bec 81c4e8fbffff 53 56 57 8b4514 }
		$sequence_1 = { 8910 33c0 8943e4 c745fcffffffff eb1f 46 83c340 }
		$sequence_2 = { 83fbff 0f8420070000 6a00 53 e8???????? 8945f8 }
		$sequence_3 = { 50 e8???????? 6a00 6a00 2df1000000 50 8b06 }
		$sequence_4 = { 6a00 56 6a00 6802000001 6a00 53 }
		$sequence_5 = { 85c0 7c04 85d2 7d02 33c9 8bc1 c3 }
		$sequence_6 = { 50 e8???????? b001 e8???????? 68???????? 68???????? e8???????? }
		$sequence_7 = { c6041000 bf01000000 8db36cfeffff 8b06 85c0 7438 }
		$sequence_8 = { bb???????? 8b45f8 50 8d8577ffffff 50 }
		$sequence_9 = { 7435 e9???????? 56 8d85effdffff }

	condition:
		7 of them and filesize < 155648
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 55 8bec 81c4e8fbffff 53 56 57 8b4514 }
$sequence_1hex{ 8910 33c0 8943e4 c745fcffffffff eb1f 46 83c340 }
$sequence_2hex{ 83fbff 0f8420070000 6a00 53 e8???????? 8945f8 }
$sequence_3hex{ 50 e8???????? 6a00 6a00 2df1000000 50 8b06 }
$sequence_4hex{ 6a00 56 6a00 6802000001 6a00 53 }
$sequence_5hex{ 85c0 7c04 85d2 7d02 33c9 8bc1 c3 }
$sequence_6hex{ 50 e8???????? b001 e8???????? 68???????? 68???????? e8???????? }
$sequence_7hex{ c6041000 bf01000000 8db36cfeffff 8b06 85c0 7438 }
$sequence_8hex{ bb???????? 8b45f8 50 8d8577ffffff 50 }
$sequence_9hex{ 7435 e9???????? 56 8d85effdffff }

Condition

7 of them and filesize < 155648

In plain words (Heuristic)

  • The file must be smaller than 155648 (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: 4dd4d8e5-7756-57be-8ce5-a21c7832bb2c

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260105
malpedia_hash19b79e7cab4eaf532122e5b45a77dd8f6bb5cc79
malpedia_version20251219
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE