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MALPEDIA_Win_Geminiduke_Auto

autogenerated rule brought to you by yara-signator

MalwareGeminidukeMalpedia 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: Geminiduke.

It defines 14 patterns (0 text, 14 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-geminiduke-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Geminiduke_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c813f2e4-4bb2-55df-aeb2-26a57862cea7"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.geminiduke"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.geminiduke_auto.yar#L1-L154"
		license_url = "N/A"
		logic_hash = "dc6f874b6b51fa873cea776bdf1fa1a6877110f2ddb71159112001b39ae77ae7"
		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 = { 8b7c2410 8b442414 8b4c2418 f3aa 5f 59 }
		$sequence_1 = { 6819000200 6a00 68???????? e8???????? 83c404 }
		$sequence_2 = { 50 51 57 8b7c2410 }
		$sequence_3 = { 83c404 50 6801000080 ff15???????? 85c0 7407 33c0 }
		$sequence_4 = { 034590 03c8 894dd0 8b45f8 }
		$sequence_5 = { 034584 8b8d64ffffff c1e907 8b9564ffffff c1e219 0bca 8b9564ffffff }
		$sequence_6 = { 034590 8b8d70ffffff c1e907 8b9570ffffff }
		$sequence_7 = { 03459c 03c8 894ddc 8b45fc }
		$sequence_8 = { 57 8b7c240c 6a01 6a00 8bf1 }
		$sequence_9 = { 8ac8 80e961 80f919 7703 b001 c3 2c41 }
		$sequence_10 = { 2500800000 50 8bcf e8???????? 8be8 8bc3 2500020000 }
		$sequence_11 = { 8b770c 89442410 8b4704 8bc8 }
		$sequence_12 = { 56 57 8bf9 8b4724 8b5f08 8b770c 89442410 }
		$sequence_13 = { 7704 8ac1 0430 8ad1 80ea0a 80fa05 7705 }

	condition:
		7 of them and filesize < 327680
}

Strings (14 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b7c2410 8b442414 8b4c2418 f3aa 5f 59 }
$sequence_1hex{ 6819000200 6a00 68???????? e8???????? 83c404 }
$sequence_2hex{ 50 51 57 8b7c2410 }
$sequence_3hex{ 83c404 50 6801000080 ff15???????? 85c0 7407 33c0 }
$sequence_4hex{ 034590 03c8 894dd0 8b45f8 }
$sequence_5hex{ 034584 8b8d64ffffff c1e907 8b9564ffffff c1e219 0bca 8b9564ffffff }
$sequence_6hex{ 034590 8b8d70ffffff c1e907 8b9570ffffff }
$sequence_7hex{ 03459c 03c8 894ddc 8b45fc }
$sequence_8hex{ 57 8b7c240c 6a01 6a00 8bf1 }
$sequence_9hex{ 8ac8 80e961 80f919 7703 b001 c3 2c41 }
$sequence_10hex{ 2500800000 50 8bcf e8???????? 8be8 8bc3 2500020000 }
$sequence_11hex{ 8b770c 89442410 8b4704 8bc8 }
$sequence_12hex{ 56 57 8bf9 8b4724 8b5f08 8b770c 89442410 }
$sequence_13hex{ 7704 8ac1 0430 8ad1 80ea0a 80fa05 7705 }

Condition

7 of them and filesize < 327680

In plain words (Heuristic)

  • The file must be smaller than 327680 (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: c813f2e4-4bb2-55df-aeb2-26a57862cea7

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