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MALPEDIA_Win_Tandfuy_Auto

autogenerated rule brought to you by yara-signator

MalwareTandfuyMalpedia 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: Tandfuy.

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

Summary generated from the rule's metadata and condition.

Rule source

win-tandfuy-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Tandfuy_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f7c34ec9-5c47-5400-953b-2fc065900f46"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.tandfuy"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.tandfuy_auto.yar#L1-L118"
		license_url = "N/A"
		logic_hash = "8bcf4f8924f2bd51984baf6f9c4aad50acc2f2e7396ee140bd5315db5dd99bae"
		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 = { f2ae 8b442410 f7d1 49 51 8b4c2418 }
		$sequence_1 = { 33c0 b9000a0000 50 50 }
		$sequence_2 = { 50 e8???????? b93f000000 33c0 8dbdecfdffff f3ab 66ab }
		$sequence_3 = { ff15???????? 8bd8 85db 0f84be000000 8d4c2408 6a00 }
		$sequence_4 = { ff15???????? 50 ff15???????? 85c0 0f84ea000000 8d4c2424 }
		$sequence_5 = { 33c0 c3 8b442408 50 ff15???????? }
		$sequence_6 = { e8???????? 83c40c 85c0 766e }
		$sequence_7 = { 33c0 f3a5 a4 b90a000000 }
		$sequence_8 = { 51 e8???????? 83c418 8bd0 8995d4faffff 8db5f0fcffff 8bfb }
		$sequence_9 = { 6800000080 56 f3ab ff15???????? 8bd8 }

	condition:
		7 of them and filesize < 155648
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ f2ae 8b442410 f7d1 49 51 8b4c2418 }
$sequence_1hex{ 33c0 b9000a0000 50 50 }
$sequence_2hex{ 50 e8???????? b93f000000 33c0 8dbdecfdffff f3ab 66ab }
$sequence_3hex{ ff15???????? 8bd8 85db 0f84be000000 8d4c2408 6a00 }
$sequence_4hex{ ff15???????? 50 ff15???????? 85c0 0f84ea000000 8d4c2424 }
$sequence_5hex{ 33c0 c3 8b442408 50 ff15???????? }
$sequence_6hex{ e8???????? 83c40c 85c0 766e }
$sequence_7hex{ 33c0 f3a5 a4 b90a000000 }
$sequence_8hex{ 51 e8???????? 83c418 8bd0 8995d4faffff 8db5f0fcffff 8bfb }
$sequence_9hex{ 6800000080 56 f3ab ff15???????? 8bd8 }

Condition

7 of them and filesize < 155648

In plain words (Heuristic)

  • The file must be smaller than 155648 (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: f7c34ec9-5c47-5400-953b-2fc065900f46

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