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MALPEDIA_Win_Graphdrop_Auto

autogenerated rule brought to you by yara-signator

MalwareGraphdropMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X (with warnings)
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 73

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Graphdrop.

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

YARA-X says: warning[text_as_hex]: hex pattern could be written as text literal

Summary generated from the rule's metadata and condition.

Rule source

win-graphdrop-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Graphdrop_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a502dee4-58c2-59e8-8295-f05130617fd5"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.graphdrop"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.graphdrop_auto.yar#L1-L107"
		license_url = "N/A"
		logic_hash = "84b8556ecbf36b2bc9b51ab9373b0c80a8b0c6c009d13b3f5d43f619d36fc014"
		score = 75
		quality = 73
		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 = { 4150 4152 415a 4158 }
		$sequence_1 = { 49c7c501000000 4150 4152 415a }
		$sequence_2 = { 90 415f 90 415d }
		$sequence_3 = { 4154 90 415c 90 }
		$sequence_4 = { 50 90 53 0f77 }
		$sequence_5 = { 4150 4152 415a 4158 49ffcd }
		$sequence_6 = { 4155 0f77 415d 90 }
		$sequence_7 = { 4155 49c7c501000000 4150 4152 415a }
		$sequence_8 = { 0f77 4157 90 415f }
		$sequence_9 = { 52 50 58 5a 49ffc9 }

	condition:
		7 of them and filesize < 4186112
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 4150 4152 415a 4158 }
$sequence_1hex{ 49c7c501000000 4150 4152 415a }
$sequence_2hex{ 90 415f 90 415d }
$sequence_3hex{ 4154 90 415c 90 }
$sequence_4hex{ 50 90 53 0f77 }
$sequence_5hex{ 4150 4152 415a 4158 49ffcd }
$sequence_6hex{ 4155 0f77 415d 90 }
$sequence_7hex{ 4155 49c7c501000000 4150 4152 415a }
$sequence_8hex{ 0f77 4157 90 415f }
$sequence_9hex{ 52 50 58 5a 49ffc9 }

Condition

7 of them and filesize < 4186112

In plain words (Heuristic)

  • The file must be smaller than 4186112 (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: a502dee4-58c2-59e8-8295-f05130617fd5

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