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MALPEDIA_Win_Suncrypt_Auto

autogenerated rule brought to you by yara-signator

MalwareSuncryptMalpedia 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: Suncrypt.

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

Summary generated from the rule's metadata and condition.

Rule source

win-suncrypt-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Suncrypt_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "438299e1-9b8a-5dbe-a855-53f87a2e7bd3"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.suncrypt"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.suncrypt_auto.yar#L1-L126"
		license_url = "N/A"
		logic_hash = "626089557c34d266e7c3da2426ab8cf2692508df2d0b7a2ba3721dc6a03911ad"
		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 = { c685dafeffff2d c685dbfeffff34 c685dcfeffff29 c685ddfeffff2c c685defeffff3a c685dffeffff5f c685e0feffff7e }
		$sequence_1 = { 33c9 c68557ffffff77 c68558ffffff6f c68559ffffff4a }
		$sequence_2 = { 0f1145c8 e8???????? 83c408 33c0 8be5 }
		$sequence_3 = { 56 ff15???????? 85c0 7416 8b4df0 8b4508 83e10f }
		$sequence_4 = { c68501ffffff00 50 56 ffd7 6808020000 6a00 }
		$sequence_5 = { 0fbec0 2bc8 eb1b 8a4f16 8ac1 2430 }
		$sequence_6 = { 85c0 7404 8b00 eb03 8b4718 89471c 80e10f }
		$sequence_7 = { c3 8b531c 85d2 7517 52 52 56 }
		$sequence_8 = { 41 81f900010000 72d4 c78568feffff1a000000 c6856cfeffff57 c6856dfeffff75 }
		$sequence_9 = { 8bc3 85c9 7411 660f1f440000 803800 740b 47 }

	condition:
		7 of them and filesize < 172032
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c685dafeffff2d c685dbfeffff34 c685dcfeffff29 c685ddfeffff2c c685defeffff3a c685dffeffff5f c685e0feffff7e }
$sequence_1hex{ 33c9 c68557ffffff77 c68558ffffff6f c68559ffffff4a }
$sequence_2hex{ 0f1145c8 e8???????? 83c408 33c0 8be5 }
$sequence_3hex{ 56 ff15???????? 85c0 7416 8b4df0 8b4508 83e10f }
$sequence_4hex{ c68501ffffff00 50 56 ffd7 6808020000 6a00 }
$sequence_5hex{ 0fbec0 2bc8 eb1b 8a4f16 8ac1 2430 }
$sequence_6hex{ 85c0 7404 8b00 eb03 8b4718 89471c 80e10f }
$sequence_7hex{ c3 8b531c 85d2 7517 52 52 56 }
$sequence_8hex{ 41 81f900010000 72d4 c78568feffff1a000000 c6856cfeffff57 c6856dfeffff75 }
$sequence_9hex{ 8bc3 85c9 7411 660f1f440000 803800 740b 47 }

Condition

7 of them and filesize < 172032

In plain words (Heuristic)

  • The file must be smaller than 172032 (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: 438299e1-9b8a-5dbe-a855-53f87a2e7bd3

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

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