Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Sage_Ransom_Auto

autogenerated rule brought to you by yara-signator

MalwareSage RansomMalpedia 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: Sage Ransom.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-sage-ransom-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Sage_Ransom_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3a539e9d-a70e-5ad2-9b0e-112b996f2a74"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.sage_ransom"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.sage_ransom_auto.yar#L1-L169"
		license_url = "N/A"
		logic_hash = "2d47f12a7cf9280840e859322435f629337f5cf352768d420cf4b487a986726d"
		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 = { 56 e8???????? 83c410 33c0 85ff 7419 803c302b }
		$sequence_1 = { 6a20 83c620 8d442408 56 50 e8???????? }
		$sequence_2 = { 56 ff15???????? 83f8ff 7515 56 ff15???????? 6a11 }
		$sequence_3 = { 8d4c2440 51 8d542464 52 e8???????? 8b84243c010000 83c020 }
		$sequence_4 = { 894e04 8b502c 8d4c3f02 51 8916 }
		$sequence_5 = { e8???????? 83c404 bbfdffffff 8d4c240c 51 e8???????? 8d54241c }
		$sequence_6 = { ff15???????? 5f 33c0 5e 59 c3 56 }
		$sequence_7 = { 51 e8???????? 83c41c 85c0 7907 83c8ff }
		$sequence_8 = { 014110 8b4314 014114 8b4318 }
		$sequence_9 = { 014108 8b430c 01410c 8b4310 }
		$sequence_10 = { 014114 8b4318 014118 8b431c }
		$sequence_11 = { 891c24 89442404 e8???????? 891c24 c744240467000000 e8???????? }
		$sequence_12 = { 013c13 83c102 46 ebd3 }
		$sequence_13 = { 0101 8b4304 014104 8b4308 014108 }
		$sequence_14 = { 01410c 8b4310 014110 8b4314 }
		$sequence_15 = { 0119 117104 83c110 83c210 }

	condition:
		7 of them and filesize < 335872
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 56 e8???????? 83c410 33c0 85ff 7419 803c302b }
$sequence_1hex{ 6a20 83c620 8d442408 56 50 e8???????? }
$sequence_2hex{ 56 ff15???????? 83f8ff 7515 56 ff15???????? 6a11 }
$sequence_3hex{ 8d4c2440 51 8d542464 52 e8???????? 8b84243c010000 83c020 }
$sequence_4hex{ 894e04 8b502c 8d4c3f02 51 8916 }
$sequence_5hex{ e8???????? 83c404 bbfdffffff 8d4c240c 51 e8???????? 8d54241c }
$sequence_6hex{ ff15???????? 5f 33c0 5e 59 c3 56 }
$sequence_7hex{ 51 e8???????? 83c41c 85c0 7907 83c8ff }
$sequence_8hex{ 014110 8b4314 014114 8b4318 }
$sequence_9hex{ 014108 8b430c 01410c 8b4310 }
$sequence_10hex{ 014114 8b4318 014118 8b431c }
$sequence_11hex{ 891c24 89442404 e8???????? 891c24 c744240467000000 e8???????? }
$sequence_12hex{ 013c13 83c102 46 ebd3 }
$sequence_13hex{ 0101 8b4304 014104 8b4308 014108 }
$sequence_14hex{ 01410c 8b4310 014110 8b4314 }
$sequence_15hex{ 0119 117104 83c110 83c210 }

Condition

7 of them and filesize < 335872

In plain words (Heuristic)

  • The file must be smaller than 335872 (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: 3a539e9d-a70e-5ad2-9b0e-112b996f2a74

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