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MALPEDIA_Win_8T_Dropper_Auto

autogenerated rule brought to you by yara-signator

Malware8T DropperMalpedia 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: 8T Dropper.

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

Summary generated from the rule's metadata and condition.

Rule source

win-8t-dropper-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_8T_Dropper_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "8127494f-aa60-50e7-9519-377aadf951ea"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.8t_dropper"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.8t_dropper_auto.yar#L1-L116"
		license_url = "N/A"
		logic_hash = "381260db79cd8ba4813029caefecf260e49d9c8ad853e09f44a370f9fca8e4d3"
		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 = { bf???????? 83c9ff f2ae f7d1 49 c6440c0c52 }
		$sequence_1 = { f2ae f7d1 49 c6440c0c52 }
		$sequence_2 = { 51 68???????? 6a02 50 8b442418 }
		$sequence_3 = { 33c0 8d7c240d c644240c00 f3ab 66ab aa bf???????? }
		$sequence_4 = { f7d1 49 c6440c0c52 c6440c0d75 c6440c0e6e }
		$sequence_5 = { 50 ff15???????? 85c0 7559 8b4c2408 }
		$sequence_6 = { 741b 56 6800700000 6a01 }
		$sequence_7 = { 51 ff15???????? 8d942410010000 6804010000 52 68???????? }
		$sequence_8 = { 7559 8b4c2408 51 ff15???????? 8d942410010000 6804010000 }
		$sequence_9 = { ff15???????? 8d942410010000 6804010000 52 }

	condition:
		7 of them and filesize < 147456
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ bf???????? 83c9ff f2ae f7d1 49 c6440c0c52 }
$sequence_1hex{ f2ae f7d1 49 c6440c0c52 }
$sequence_2hex{ 51 68???????? 6a02 50 8b442418 }
$sequence_3hex{ 33c0 8d7c240d c644240c00 f3ab 66ab aa bf???????? }
$sequence_4hex{ f7d1 49 c6440c0c52 c6440c0d75 c6440c0e6e }
$sequence_5hex{ 50 ff15???????? 85c0 7559 8b4c2408 }
$sequence_6hex{ 741b 56 6800700000 6a01 }
$sequence_7hex{ 51 ff15???????? 8d942410010000 6804010000 52 68???????? }
$sequence_8hex{ 7559 8b4c2408 51 ff15???????? 8d942410010000 6804010000 }
$sequence_9hex{ ff15???????? 8d942410010000 6804010000 52 }

Condition

7 of them and filesize < 147456

In plain words (Heuristic)

  • The file must be smaller than 147456 (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: 8127494f-aa60-50e7-9519-377aadf951ea

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