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MALPEDIA_Win_Careto_Auto

autogenerated rule brought to you by yara-signator

MalwareCaretoMalpedia 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: Careto.

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

Summary generated from the rule's metadata and condition.

Rule source

win-careto-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Careto_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "df5d3b26-0b1d-526d-8e38-3fdbee514439"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.careto"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.careto_auto.yar#L1-L120"
		license_url = "N/A"
		logic_hash = "6e411afd17e211b09b6684a5fdb23e12a3c1d4b65ab99224fe62b7bee188b4df"
		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 = { ff55f4 8bf0 83feff 0f849b000000 }
		$sequence_1 = { 395d6c 0f84aa000000 56 33f6 395d6c 0f869d000000 53 }
		$sequence_2 = { c21400 ff7560 eb01 57 ff15???????? 33c0 ebe6 }
		$sequence_3 = { ff75fc ff15???????? 8bf0 85f6 0f84d1010000 53 }
		$sequence_4 = { 57 8bf8 d1ff ff05???????? 833d????????03 897df8 750e }
		$sequence_5 = { 81ecb8080000 53 8b5d08 68???????? 53 }
		$sequence_6 = { 663d0004 0f95c1 49 83e103 03cd }
		$sequence_7 = { f3a5 8bca 83e103 f3a4 c68405edfdffff00 }
		$sequence_8 = { 7522 83be8c00000001 7506 c70610000000 }
		$sequence_9 = { 50 8d856cfdffff 50 ff7570 c7456804010000 895d5c }

	condition:
		7 of them and filesize < 94208
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff55f4 8bf0 83feff 0f849b000000 }
$sequence_1hex{ 395d6c 0f84aa000000 56 33f6 395d6c 0f869d000000 53 }
$sequence_2hex{ c21400 ff7560 eb01 57 ff15???????? 33c0 ebe6 }
$sequence_3hex{ ff75fc ff15???????? 8bf0 85f6 0f84d1010000 53 }
$sequence_4hex{ 57 8bf8 d1ff ff05???????? 833d????????03 897df8 750e }
$sequence_5hex{ 81ecb8080000 53 8b5d08 68???????? 53 }
$sequence_6hex{ 663d0004 0f95c1 49 83e103 03cd }
$sequence_7hex{ f3a5 8bca 83e103 f3a4 c68405edfdffff00 }
$sequence_8hex{ 7522 83be8c00000001 7506 c70610000000 }
$sequence_9hex{ 50 8d856cfdffff 50 ff7570 c7456804010000 895d5c }

Condition

7 of them and filesize < 94208

In plain words (Heuristic)

  • The file must be smaller than 94208 (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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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: df5d3b26-0b1d-526d-8e38-3fdbee514439

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