Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Firechili_Auto

autogenerated rule brought to you by yara-signator

MalwareFirechiliMalpedia 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: Firechili.

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

Summary generated from the rule's metadata and condition.

Rule source

win-firechili-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Firechili_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "28cfd257-2962-529a-a32d-592d4dcea4c0"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.firechili"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.firechili_auto.yar#L1-L123"
		license_url = "N/A"
		logic_hash = "54da2a2a6e07f200c250dd9cd8406105f845dc689c9290b895febdc48bbd5956"
		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 = { 400fb6ff 488d4c2420 84c0 410f45ff }
		$sequence_1 = { c3 e8???????? 833d????????00 74e2 4c8bc3 e8???????? 488905???????? }
		$sequence_2 = { 33ff 41897b10 49897b18 33c0 498943c8 498943d0 }
		$sequence_3 = { ff15???????? eb07 bb0f001cc0 eb2d 488b4c2430 8b442440 }
		$sequence_4 = { 4c8d05b4430000 89442434 498bc0 48894c2420 48894c242c 895c2438 }
		$sequence_5 = { 488bcf ff15???????? eb10 488bd7 }
		$sequence_6 = { 0f1f00 488d0440 488d34c500000000 420fb7442e10 428b542e14 0fb6c8 }
		$sequence_7 = { 48894138 41807c241000 0f848d000000 4885c0 0f8484000000 4d8bc4 498bd7 }
		$sequence_8 = { 4839542420 7509 33c0 663b442428 745e ff15???????? }
		$sequence_9 = { 488b4908 ff15???????? 8bd8 85c0 0f881b010000 4c8d8c24a8020000 41b848020000 }

	condition:
		7 of them and filesize < 91136
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 400fb6ff 488d4c2420 84c0 410f45ff }
$sequence_1hex{ c3 e8???????? 833d????????00 74e2 4c8bc3 e8???????? 488905???????? }
$sequence_2hex{ 33ff 41897b10 49897b18 33c0 498943c8 498943d0 }
$sequence_3hex{ ff15???????? eb07 bb0f001cc0 eb2d 488b4c2430 8b442440 }
$sequence_4hex{ 4c8d05b4430000 89442434 498bc0 48894c2420 48894c242c 895c2438 }
$sequence_5hex{ 488bcf ff15???????? eb10 488bd7 }
$sequence_6hex{ 0f1f00 488d0440 488d34c500000000 420fb7442e10 428b542e14 0fb6c8 }
$sequence_7hex{ 48894138 41807c241000 0f848d000000 4885c0 0f8484000000 4d8bc4 498bd7 }
$sequence_8hex{ 4839542420 7509 33c0 663b442428 745e ff15???????? }
$sequence_9hex{ 488b4908 ff15???????? 8bd8 85c0 0f881b010000 4c8d8c24a8020000 41b848020000 }

Condition

7 of them and filesize < 91136

In plain words (Heuristic)

  • The file must be smaller than 91136 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

Open in editor

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: 28cfd257-2962-529a-a32d-592d4dcea4c0

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