Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Revil_Auto

autogenerated rule brought to you by yara-signator

MalwareRevilMalpedia 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: Revil.

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

Summary generated from the rule's metadata and condition.

Rule source

win-revil-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Revil_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "b1ad6f98-f355-58f7-9005-19954a2d15bd"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.revil"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.revil_auto.yar#L1-L121"
		license_url = "N/A"
		logic_hash = "5d33fffaf68198c6aae66933e5fea0ec5482714ebf11d122b8198c06a1f19c8f"
		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 = { c1ee1f 0bd1 03c0 0bf0 8bc2 334324 8bce }
		$sequence_1 = { 894df4 8b4e0c 334e34 334e5c 338e84000000 338eac000000 8955dc }
		$sequence_2 = { 8dbd80feffff f3a5 50 e8???????? }
		$sequence_3 = { 8b5a70 8b5274 0fa4fe12 c1e90e c1e712 0bc6 0bcf }
		$sequence_4 = { 89463c 0bcb 894e38 33c0 8b7e58 8bca 8b765c }
		$sequence_5 = { ff15???????? 8bf0 6a01 ff15???????? ff15???????? 3bf0 74ee }
		$sequence_6 = { 894104 8bce f7d1 8bc2 234ddc }
		$sequence_7 = { 0bcb 894a78 8bcf 89427c }
		$sequence_8 = { 7508 85ff 0f850a010000 8b7518 b8c8000000 }
		$sequence_9 = { 3bd6 72ee 8b7d14 8d8534ffffff }

	condition:
		7 of them and filesize < 155794432
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c1ee1f 0bd1 03c0 0bf0 8bc2 334324 8bce }
$sequence_1hex{ 894df4 8b4e0c 334e34 334e5c 338e84000000 338eac000000 8955dc }
$sequence_2hex{ 8dbd80feffff f3a5 50 e8???????? }
$sequence_3hex{ 8b5a70 8b5274 0fa4fe12 c1e90e c1e712 0bc6 0bcf }
$sequence_4hex{ 89463c 0bcb 894e38 33c0 8b7e58 8bca 8b765c }
$sequence_5hex{ ff15???????? 8bf0 6a01 ff15???????? ff15???????? 3bf0 74ee }
$sequence_6hex{ 894104 8bce f7d1 8bc2 234ddc }
$sequence_7hex{ 0bcb 894a78 8bcf 89427c }
$sequence_8hex{ 7508 85ff 0f850a010000 8b7518 b8c8000000 }
$sequence_9hex{ 3bd6 72ee 8b7d14 8d8534ffffff }

Condition

7 of them and filesize < 155794432

In plain words (Heuristic)

  • The file must be smaller than 155794432 (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: b1ad6f98-f355-58f7-9005-19954a2d15bd

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

More Revil rules