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MALPEDIA_Win_Webc2_Rave_Auto

autogenerated rule brought to you by yara-signator

MalwareWebc2 RaveMalpedia 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 Rave.

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

Summary generated from the rule's metadata and condition.

Rule source

win-webc2-rave-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Webc2_Rave_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "5cefe188-b2d5-5d9e-9fe6-d10eb4d1e4b8"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.webc2_rave"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.webc2_rave_auto.yar#L1-L117"
		license_url = "N/A"
		logic_hash = "e5f1d782ff65857d244868f23af182288f59ab9fb6a377cec826015ac4afc033"
		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 = { 83f830 720b 83f839 7706 83c004 c20400 83f82d }
		$sequence_1 = { 85db 759e 8dbc242c010000 83c9ff 33c0 }
		$sequence_2 = { 03de 81e3ff000000 8bf3 8a5c3410 885c0c10 }
		$sequence_3 = { be???????? 8d8c241c010000 8a01 8ad0 3a06 }
		$sequence_4 = { 8b3d???????? 8d542414 8d4604 51 }
		$sequence_5 = { b941000000 33c0 8dbc24b0020000 83c410 }
		$sequence_6 = { 33c9 eb05 1bc9 83d9ff 85c9 7423 8b4508 }
		$sequence_7 = { 56 57 b900010000 33c0 8d7c2414 }
		$sequence_8 = { 5d 5b 81c454030000 c3 6a20 ffd7 }
		$sequence_9 = { 85c0 0f8426010000 8d4c244c 6804010000 8d542450 }

	condition:
		7 of them and filesize < 57344
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 83f830 720b 83f839 7706 83c004 c20400 83f82d }
$sequence_1hex{ 85db 759e 8dbc242c010000 83c9ff 33c0 }
$sequence_2hex{ 03de 81e3ff000000 8bf3 8a5c3410 885c0c10 }
$sequence_3hex{ be???????? 8d8c241c010000 8a01 8ad0 3a06 }
$sequence_4hex{ 8b3d???????? 8d542414 8d4604 51 }
$sequence_5hex{ b941000000 33c0 8dbc24b0020000 83c410 }
$sequence_6hex{ 33c9 eb05 1bc9 83d9ff 85c9 7423 8b4508 }
$sequence_7hex{ 56 57 b900010000 33c0 8d7c2414 }
$sequence_8hex{ 5d 5b 81c454030000 c3 6a20 ffd7 }
$sequence_9hex{ 85c0 0f8426010000 8d4c244c 6804010000 8d542450 }

Condition

7 of them and filesize < 57344

In plain words (Heuristic)

  • The file must be smaller than 57344 (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: 5cefe188-b2d5-5d9e-9fe6-d10eb4d1e4b8

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