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YARA · Signature Base (Florian Roth / Nextron)

SIGNATURE_BASE_MAL_RANSOM_Conticrypter

Signature for a crypter associated with Conti

MalwareContiSignature Base (Florian Roth / Nextron)Detection Rule License 1.1Compiles with YARA-X
Author
James Quinn, Binary Defense
Date
2021-03-17
Modified
2023-12-05
Score / Quality
75 / 85

What this rule detects

Signature for a crypter associated with Conti

Associated malware family: Conti.

It defines 4 patterns (0 text, 4 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
mal-ransom-conticrypter.yarDetection Rule License 1.1
rule SIGNATURE_BASE_MAL_RANSOM_Conticrypter
{
	meta:
		description = "Signature for a crypter associated with Conti"
		author = "James Quinn, Binary Defense"
		id = "f2a00655-41a2-5614-9c29-3629c93c0e95"
		date = "2021-03-17"
		modified = "2023-12-05"
		reference = "https://github.com/Neo23x0/signature-base"
		source_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/crime_ransom_conti.yar#L2-L16"
		license_url = "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
		logic_hash = "256fbd028a91da45049e2e861e16e97201f09cb92ab049eda373c80e6a796726"
		score = 75
		quality = 85
		tags = ""
		tlp = "White"

	strings:
		$handoff1 = {4C 8D 05 ?? ?? ?? ?? 48 C7 44 24 28 00 00 00 00 C7 44 24 20 00 00 00 00 e8}
		$handoff2 = {C7 ?? 24 ?? 00 00 00 00 89 44 24 ?? C7 ?? 24 ?? ?? ?? ?? ?? C7 ?? 24 ?? 00 00 00 00 }
		$garbageLoad1 = {53 48 83 EC 20 89 CB 48 8D 0D ?? ?? ?? ?? FF 15 ?? ?? ?? ?? 01 D8 48 83 C4 20 5B C3}
		$garbageLoad2 = {55 89 E5 83 EC 18 C7 ?? 24 ?? ?? ?? ?? FF 15 ?? ?? ?? ?? 03 45 08 52 C9 C3}

	condition:
		1 of ( $handoff* ) and 1 of ( $garbageLoad* )
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$handoff1hex{4C 8D 05 ?? ?? ?? ?? 48 C7 44 24 28 00 00 00 00 C7 44 24 20 00 00 00 00 e8}
$handoff2hex{C7 ?? 24 ?? 00 00 00 00 89 44 24 ?? C7 ?? 24 ?? ?? ?? ?? ?? C7 ?? 24 ?? 00 00 00 00 }
$garbageLoad1hex{53 48 83 EC 20 89 CB 48 8D 0D ?? ?? ?? ?? FF 15 ?? ?? ?? ?? 01 D8 48 83 C4 20 5B C3}
$garbageLoad2hex{55 89 E5 83 EC 18 C7 ?? 24 ?? ?? ?? ?? FF 15 ?? ?? ?? ?? 03 45 08 52 C9 C3}

Condition

1 of ( $handoff* ) and 1 of ( $garbageLoad* )

In plain words (Heuristic)

  • At least 1 patterns in ( $handoff* ) must match.
  • At least 1 patterns in ( $garbageLoad* ) must match.

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References

Licence & attribution

Author: James Quinn, Binary Defense

Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: f2a00655-41a2-5614-9c29-3629c93c0e95

Metadata

tlpWhite

Related rules

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