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MALPEDIA_Win_Fullmetal_Auto

autogenerated rule brought to you by yara-signator

MalwareFullmetalMalpedia 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: Fullmetal.

It defines 8 patterns (0 text, 8 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-fullmetal-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Fullmetal_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "855da0e4-b67c-5e96-940e-51fe9337ca3a"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.fullmetal"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.fullmetal_auto.yar#L1-L101"
		license_url = "N/A"
		logic_hash = "6ff59e0e5bd1ba537b4bb84615f6a75f4daef5ba07d099bc3ea4d3a200088092"
		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 = { 488bc8 33d2 e8???????? 488bd8 4885c0 7517 }
		$sequence_1 = { 4863c8 4881f9ff0f0000 7366 807c39ff5c 740a }
		$sequence_2 = { 75f6 48c7c1ffffffff 48ffc1 803c0a00 75f7 48ffc0 }
		$sequence_3 = { 4b0394d8404a0400 8a02 88440dff 48ffc1 48ffc2 }
		$sequence_4 = { e8???????? 4885c0 7520 41b800100000 }
		$sequence_5 = { c3 a1????????3d0000a1 3c00 00053d0000f3 3c00 }
		$sequence_6 = { 7512 ff15???????? 4c8d0d06970200 e9???????? 488d1512970200 488bcb }
		$sequence_7 = { 4d63c8 488bd3 4c8d8340010000 4c895c2420 ff15???????? 0f1000 }

	condition:
		7 of them and filesize < 733184
}

Strings (8 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488bc8 33d2 e8???????? 488bd8 4885c0 7517 }
$sequence_1hex{ 4863c8 4881f9ff0f0000 7366 807c39ff5c 740a }
$sequence_2hex{ 75f6 48c7c1ffffffff 48ffc1 803c0a00 75f7 48ffc0 }
$sequence_3hex{ 4b0394d8404a0400 8a02 88440dff 48ffc1 48ffc2 }
$sequence_4hex{ e8???????? 4885c0 7520 41b800100000 }
$sequence_5hex{ c3 a1????????3d0000a1 3c00 00053d0000f3 3c00 }
$sequence_6hex{ 7512 ff15???????? 4c8d0d06970200 e9???????? 488d1512970200 488bcb }
$sequence_7hex{ 4d63c8 488bd3 4c8d8340010000 4c895c2420 ff15???????? 0f1000 }

Condition

7 of them and filesize < 733184

In plain words (Heuristic)

  • The file must be smaller than 733184 (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: 855da0e4-b67c-5e96-940e-51fe9337ca3a

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