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MALPEDIA_Win_Webc2_Adspace_Auto

autogenerated rule brought to you by yara-signator

MalwareWebc2 AdspaceMalpedia 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: Webc2 Adspace.

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

Summary generated from the rule's metadata and condition.

Rule source

win-webc2-adspace-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Webc2_Adspace_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "0dff9713-e4cb-58e3-953c-a3fe4b8702d9"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.webc2_adspace"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.webc2_adspace_auto.yar#L1-L121"
		license_url = "N/A"
		logic_hash = "2aceed9decd37a1fe606f240cdfda10cb442b0491094f3466c8db6d636f895fe"
		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 = { 53 e8???????? ff7510 ff15???????? }
		$sequence_1 = { 8bc1 c3 c20400 8b442408 48 }
		$sequence_2 = { 8d4dec e8???????? 6a0a ff15???????? }
		$sequence_3 = { 6a03 e8???????? 8b35???????? 68???????? ffd6 }
		$sequence_4 = { 8d4580 6a00 50 e8???????? 46 8d4580 56 }
		$sequence_5 = { e8???????? 80243b00 6a2f 53 ff15???????? 40 50 }
		$sequence_6 = { 8bf0 e8???????? 6a50 59 3bc1 7609 }
		$sequence_7 = { 55 e8???????? 83c40c e9???????? 56 e8???????? 55 }
		$sequence_8 = { 68???????? 56 8bd8 e8???????? 6af8 }
		$sequence_9 = { 89442420 e8???????? 8b4c2420 2bc7 03c1 50 89442424 }

	condition:
		7 of them and filesize < 49152
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 53 e8???????? ff7510 ff15???????? }
$sequence_1hex{ 8bc1 c3 c20400 8b442408 48 }
$sequence_2hex{ 8d4dec e8???????? 6a0a ff15???????? }
$sequence_3hex{ 6a03 e8???????? 8b35???????? 68???????? ffd6 }
$sequence_4hex{ 8d4580 6a00 50 e8???????? 46 8d4580 56 }
$sequence_5hex{ e8???????? 80243b00 6a2f 53 ff15???????? 40 50 }
$sequence_6hex{ 8bf0 e8???????? 6a50 59 3bc1 7609 }
$sequence_7hex{ 55 e8???????? 83c40c e9???????? 56 e8???????? 55 }
$sequence_8hex{ 68???????? 56 8bd8 e8???????? 6af8 }
$sequence_9hex{ 89442420 e8???????? 8b4c2420 2bc7 03c1 50 89442424 }

Condition

7 of them and filesize < 49152

In plain words (Heuristic)

  • The file must be smaller than 49152 (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: 0dff9713-e4cb-58e3-953c-a3fe4b8702d9

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