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MALPEDIA_Win_Webc2_Head_Auto

autogenerated rule brought to you by yara-signator

MalwareWebc2 HeadMalpedia 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 Head.

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

Summary generated from the rule's metadata and condition.

Rule source

win-webc2-head-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Webc2_Head_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "d4e6e5cb-74a5-542a-9357-9594f4725991"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.webc2_head"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.webc2_head_auto.yar#L1-L120"
		license_url = "N/A"
		logic_hash = "394f3309d74a178201ba63d639ef72e0e8440ef340541d411459feea7eafad4e"
		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 = { 8b442410 83c204 48 89542424 }
		$sequence_1 = { 5e 5d 83c8ff 5b 81c4341c0000 }
		$sequence_2 = { 8a15???????? b910000000 be???????? 8d7c2428 f3a5 895c2410 88542410 }
		$sequence_3 = { 7e2a b910000000 be???????? 8dbc2474010000 f3a5 c1ea10 }
		$sequence_4 = { 8d7c2414 c1e902 f3a5 8bca 83e103 f3a4 8b542414 }
		$sequence_5 = { 55 ff15???????? a3???????? eb19 }
		$sequence_6 = { 49 894c241c 8d942444040000 8d41fd 89542420 }
		$sequence_7 = { 8d049500000000 8d0c52 89442410 894c2424 8b442420 8b00 8bc8 }
		$sequence_8 = { f6c202 7410 8088????????20 8a9405ecfcffff ebe3 80a0e0b8400000 }
		$sequence_9 = { 884502 7e2a b910000000 be???????? 8dbc2474010000 }

	condition:
		7 of them and filesize < 106496
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b442410 83c204 48 89542424 }
$sequence_1hex{ 5e 5d 83c8ff 5b 81c4341c0000 }
$sequence_2hex{ 8a15???????? b910000000 be???????? 8d7c2428 f3a5 895c2410 88542410 }
$sequence_3hex{ 7e2a b910000000 be???????? 8dbc2474010000 f3a5 c1ea10 }
$sequence_4hex{ 8d7c2414 c1e902 f3a5 8bca 83e103 f3a4 8b542414 }
$sequence_5hex{ 55 ff15???????? a3???????? eb19 }
$sequence_6hex{ 49 894c241c 8d942444040000 8d41fd 89542420 }
$sequence_7hex{ 8d049500000000 8d0c52 89442410 894c2424 8b442420 8b00 8bc8 }
$sequence_8hex{ f6c202 7410 8088????????20 8a9405ecfcffff ebe3 80a0e0b8400000 }
$sequence_9hex{ 884502 7e2a b910000000 be???????? 8dbc2474010000 }

Condition

7 of them and filesize < 106496

In plain words (Heuristic)

  • The file must be smaller than 106496 (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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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: d4e6e5cb-74a5-542a-9357-9594f4725991

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