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MALPEDIA_Win_Crypmic_Auto

autogenerated rule brought to you by yara-signator

MalwareCrypmicMalpedia 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: Crypmic.

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

Summary generated from the rule's metadata and condition.

Rule source

win-crypmic-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Crypmic_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2fb5a5d4-5639-5151-9ecd-a14d51c7dc38"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.crypmic"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.crypmic_auto.yar#L1-L118"
		license_url = "N/A"
		logic_hash = "e3f372b74e5b162e0a142ad1aca38c8e8cd788c7dafdd2731e03882c89febb3e"
		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 = { 6810040000 6a08 ff7104 8bfa }
		$sequence_1 = { ff7104 8bfa 894dec c745e800000000 ffd0 0fb717 }
		$sequence_2 = { 8bec 83ec0c 8b413c 53 8b440878 }
		$sequence_3 = { 8b413c 33db 8b440878 03c1 8945fc 395818 }
		$sequence_4 = { ffd0 85f6 7410 8b55f8 33c0 8bcf 66894302 }
		$sequence_5 = { 8b470c 6a00 ff7704 ffd0 }
		$sequence_6 = { d3e0 8d048528000000 50 8b4608 6a08 ff7604 ffd0 }
		$sequence_7 = { 8b4de4 894f04 8b4de8 894f08 668b4df0 66894f0c }
		$sequence_8 = { 72f0 8b45f0 5f 5e 5b }
		$sequence_9 = { ffd0 c70700000000 5f 5e }

	condition:
		7 of them and filesize < 81920
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 6810040000 6a08 ff7104 8bfa }
$sequence_1hex{ ff7104 8bfa 894dec c745e800000000 ffd0 0fb717 }
$sequence_2hex{ 8bec 83ec0c 8b413c 53 8b440878 }
$sequence_3hex{ 8b413c 33db 8b440878 03c1 8945fc 395818 }
$sequence_4hex{ ffd0 85f6 7410 8b55f8 33c0 8bcf 66894302 }
$sequence_5hex{ 8b470c 6a00 ff7704 ffd0 }
$sequence_6hex{ d3e0 8d048528000000 50 8b4608 6a08 ff7604 ffd0 }
$sequence_7hex{ 8b4de4 894f04 8b4de8 894f08 668b4df0 66894f0c }
$sequence_8hex{ 72f0 8b45f0 5f 5e 5b }
$sequence_9hex{ ffd0 c70700000000 5f 5e }

Condition

7 of them and filesize < 81920

In plain words (Heuristic)

  • The file must be smaller than 81920 (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.

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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: 2fb5a5d4-5639-5151-9ecd-a14d51c7dc38

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