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MALPEDIA_Win_Enfal_Auto

autogenerated rule brought to you by yara-signator

MalwareEnfalMalpedia 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: Enfal.

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

Summary generated from the rule's metadata and condition.

Rule source

win-enfal-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Enfal_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "76e67618-ae5f-5e6f-b36a-f6e61e82415a"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.enfal"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.enfal_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "78bfb8fb04b701b7c2ebdd450cd7fec7b7cf53c5a9b52b49092d5af345cf38b0"
		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 = { 8d85f8fdffff 57 50 6804010000 ff5608 8d85f8fdffff }
		$sequence_1 = { 894108 ffd6 8b4b1c 68???????? 57 89410c ffd6 }
		$sequence_2 = { 51 8d8d68ffffff 51 8d8de8fcffff }
		$sequence_3 = { bf00010000 33db 57 8d85e8fcffff 53 50 }
		$sequence_4 = { 50 ff15???????? 6a0f 56 53 e8???????? }
		$sequence_5 = { 683a040000 ff55e0 85c0 8945fc 0f84b5000000 56 }
		$sequence_6 = { a5 66a5 a4 be???????? 8dbd58ffffff }
		$sequence_7 = { ff5620 85c0 7403 6a01 5f 53 ff15???????? }
		$sequence_8 = { 8b750c 57 57 6a02 8b461c 57 57 }
		$sequence_9 = { 8b4e04 8b4610 0faf4d08 03c1 }

	condition:
		7 of them and filesize < 65536
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8d85f8fdffff 57 50 6804010000 ff5608 8d85f8fdffff }
$sequence_1hex{ 894108 ffd6 8b4b1c 68???????? 57 89410c ffd6 }
$sequence_2hex{ 51 8d8d68ffffff 51 8d8de8fcffff }
$sequence_3hex{ bf00010000 33db 57 8d85e8fcffff 53 50 }
$sequence_4hex{ 50 ff15???????? 6a0f 56 53 e8???????? }
$sequence_5hex{ 683a040000 ff55e0 85c0 8945fc 0f84b5000000 56 }
$sequence_6hex{ a5 66a5 a4 be???????? 8dbd58ffffff }
$sequence_7hex{ ff5620 85c0 7403 6a01 5f 53 ff15???????? }
$sequence_8hex{ 8b750c 57 57 6a02 8b461c 57 57 }
$sequence_9hex{ 8b4e04 8b4610 0faf4d08 03c1 }

Condition

7 of them and filesize < 65536

In plain words (Heuristic)

  • The file must be smaller than 65536 (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: 76e67618-ae5f-5e6f-b36a-f6e61e82415a

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