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MALPEDIA_Win_Narilam_Auto

autogenerated rule brought to you by yara-signator

MalwareNarilamMalpedia 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: Narilam.

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

Summary generated from the rule's metadata and condition.

Rule source

win-narilam-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Narilam_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "af0e4e1f-e94b-5739-b250-feb476e56fd8"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.narilam"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.narilam_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "da37473068a43dcf4df78c2e458b0e88b0f6e24efee8edcae0e2f184bead1d80"
		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 = { e8???????? e8???????? 85c0 0f8e90000000 8bc3 e8???????? e8???????? }
		$sequence_1 = { e8???????? 50 8bc3 8b10 ff527c 8bd0 4a }
		$sequence_2 = { 8d7818 8d75e0 a5 a5 a5 a5 eb15 }
		$sequence_3 = { ff8de8feffff 8d45c0 ba02000000 e8???????? 66c785dcfeffff9800 ba???????? 8d45bc }
		$sequence_4 = { ffb50cfeffff e8???????? 59 8985f4fdffff 8b4d08 83b96003000006 0f85ff010000 }
		$sequence_5 = { e8???????? eb13 8bce b201 a1???????? e8???????? e8???????? }
		$sequence_6 = { 8bf2 8bd8 8bd6 8bc3 8b08 ff91d0010000 8bd6 }
		$sequence_7 = { 8d8540ffffff ba02000000 e8???????? 66c785dcfeffff1802 ba???????? 8d853cffffff e8???????? }
		$sequence_8 = { 8bd0 ff85e8feffff 8b4510 e8???????? 8d55f8 52 ba???????? }
		$sequence_9 = { 8d8568ffffff e8???????? 8bc8 ff852cfeffff 8b95f4fdffff 8b949570e3f9ff 8b85fcfdffff }

	condition:
		7 of them and filesize < 3325952
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? e8???????? 85c0 0f8e90000000 8bc3 e8???????? e8???????? }
$sequence_1hex{ e8???????? 50 8bc3 8b10 ff527c 8bd0 4a }
$sequence_2hex{ 8d7818 8d75e0 a5 a5 a5 a5 eb15 }
$sequence_3hex{ ff8de8feffff 8d45c0 ba02000000 e8???????? 66c785dcfeffff9800 ba???????? 8d45bc }
$sequence_4hex{ ffb50cfeffff e8???????? 59 8985f4fdffff 8b4d08 83b96003000006 0f85ff010000 }
$sequence_5hex{ e8???????? eb13 8bce b201 a1???????? e8???????? e8???????? }
$sequence_6hex{ 8bf2 8bd8 8bd6 8bc3 8b08 ff91d0010000 8bd6 }
$sequence_7hex{ 8d8540ffffff ba02000000 e8???????? 66c785dcfeffff1802 ba???????? 8d853cffffff e8???????? }
$sequence_8hex{ 8bd0 ff85e8feffff 8b4510 e8???????? 8d55f8 52 ba???????? }
$sequence_9hex{ 8d8568ffffff e8???????? 8bc8 ff852cfeffff 8b95f4fdffff 8b949570e3f9ff 8b85fcfdffff }

Condition

7 of them and filesize < 3325952

In plain words (Heuristic)

  • The file must be smaller than 3325952 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: af0e4e1f-e94b-5739-b250-feb476e56fd8

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