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MALPEDIA_Win_Tflower_Auto

autogenerated rule brought to you by yara-signator

MalwareTflowerMalpedia 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: Tflower.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-tflower-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Tflower_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "b6b318ab-da35-5322-bfc0-6904101036e2"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.tflower"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.tflower_auto.yar#L1-L155"
		license_url = "N/A"
		logic_hash = "363250cdff28fcd23eda1338c19846d3acf92b9a2757198928248141924dee73"
		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 = { ff15???????? 85db 7423 895e04 }
		$sequence_1 = { 8bde ff36 8d85e8fdfdff c7460400000000 68???????? }
		$sequence_2 = { 0001 0200 0103 0303 }
		$sequence_3 = { 8bba446f4f00 c1e104 33b1416f4f00 33b9456f4f00 0fb6cc 8b842494000000 }
		$sequence_4 = { 0fb60c85167c4b00 0fb63485177c4b00 8bf9 8985b4f8ffff c1e702 57 }
		$sequence_5 = { 0008 7408 0002 7408 }
		$sequence_6 = { 0001 7708 00f3 7608 }
		$sequence_7 = { 000f 7708 0001 7708 }
		$sequence_8 = { 6a2f 68???????? 56 e8???????? 83c40c 5e }
		$sequence_9 = { 0010 740b 0021 740b }
		$sequence_10 = { 001a 0c05 003c0c 05004e0c05 }
		$sequence_11 = { 330cb5189c4e00 8b5734 33e9 8b7730 33d5 c1ca04 }
		$sequence_12 = { 000b 8605???????? 007885 0500788605 }
		$sequence_13 = { 0002 7408 00f7 7308 }
		$sequence_14 = { 83e03f 330c8518964e00 330c95189d4e00 8b5764 }
		$sequence_15 = { 8bc2 c1e818 894efe 0fb60c8520dd4e00 }

	condition:
		7 of them and filesize < 6578176
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff15???????? 85db 7423 895e04 }
$sequence_1hex{ 8bde ff36 8d85e8fdfdff c7460400000000 68???????? }
$sequence_2hex{ 0001 0200 0103 0303 }
$sequence_3hex{ 8bba446f4f00 c1e104 33b1416f4f00 33b9456f4f00 0fb6cc 8b842494000000 }
$sequence_4hex{ 0fb60c85167c4b00 0fb63485177c4b00 8bf9 8985b4f8ffff c1e702 57 }
$sequence_5hex{ 0008 7408 0002 7408 }
$sequence_6hex{ 0001 7708 00f3 7608 }
$sequence_7hex{ 000f 7708 0001 7708 }
$sequence_8hex{ 6a2f 68???????? 56 e8???????? 83c40c 5e }
$sequence_9hex{ 0010 740b 0021 740b }
$sequence_10hex{ 001a 0c05 003c0c 05004e0c05 }
$sequence_11hex{ 330cb5189c4e00 8b5734 33e9 8b7730 33d5 c1ca04 }
$sequence_12hex{ 000b 8605???????? 007885 0500788605 }
$sequence_13hex{ 0002 7408 00f7 7308 }
$sequence_14hex{ 83e03f 330c8518964e00 330c95189d4e00 8b5764 }
$sequence_15hex{ 8bc2 c1e818 894efe 0fb60c8520dd4e00 }

Condition

7 of them and filesize < 6578176

In plain words (Heuristic)

  • The file must be smaller than 6578176 (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: b6b318ab-da35-5322-bfc0-6904101036e2

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