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MALPEDIA_Win_Gspy_Auto

autogenerated rule brought to you by yara-signator

MalwareGspyMalpedia 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: Gspy.

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

Summary generated from the rule's metadata and condition.

Rule source

win-gspy-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Gspy_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "7626af5e-836e-5022-af48-0023f94f9118"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.gspy"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.gspy_auto.yar#L1-L132"
		license_url = "N/A"
		logic_hash = "3a5d2e1316df0639ee07c76bc59a11a385bbcf5636e050885bf35e88f0de9304"
		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 = { c78424d400000099f0883d c78424d800000024a63dde c78424dc0000005bd3b382 c78424e00000009c7e06f4 c78424e40000000816aa07 c78424e80000007ef93a37 c78424ec00000041c4b015 }
		$sequence_1 = { 75e9 8d4c2424 83fe01 752b 8d94242c020000 52 }
		$sequence_2 = { 50 ff15???????? 8b442424 8b35???????? 85c0 7403 50 }
		$sequence_3 = { e8???????? 55 8ad8 a1???????? 6a00 50 ff15???????? }
		$sequence_4 = { 83c604 8907 8b06 83c704 85c0 75d9 eb04 }
		$sequence_5 = { 51 ff15???????? 8b74241c 8b442418 8b10 50 8b4208 }
		$sequence_6 = { 50 e8???????? 8d4c2404 51 6a00 b801000000 6a00 }
		$sequence_7 = { 50 885c2420 ffd7 85c0 740f 03c0 8d742460 }
		$sequence_8 = { 56 33db b802000000 57 bf00100000 896c2410 }
		$sequence_9 = { 50 8bf0 ff15???????? 85c0 7430 03c0 e8???????? }

	condition:
		7 of them and filesize < 421888
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c78424d400000099f0883d c78424d800000024a63dde c78424dc0000005bd3b382 c78424e00000009c7e06f4 c78424e40000000816aa07 c78424e80000007ef93a37 c78424ec00000041c4b0 …
$sequence_1hex{ 75e9 8d4c2424 83fe01 752b 8d94242c020000 52 }
$sequence_2hex{ 50 ff15???????? 8b442424 8b35???????? 85c0 7403 50 }
$sequence_3hex{ e8???????? 55 8ad8 a1???????? 6a00 50 ff15???????? }
$sequence_4hex{ 83c604 8907 8b06 83c704 85c0 75d9 eb04 }
$sequence_5hex{ 51 ff15???????? 8b74241c 8b442418 8b10 50 8b4208 }
$sequence_6hex{ 50 e8???????? 8d4c2404 51 6a00 b801000000 6a00 }
$sequence_7hex{ 50 885c2420 ffd7 85c0 740f 03c0 8d742460 }
$sequence_8hex{ 56 33db b802000000 57 bf00100000 896c2410 }
$sequence_9hex{ 50 8bf0 ff15???????? 85c0 7430 03c0 e8???????? }

Condition

7 of them and filesize < 421888

In plain words (Heuristic)

  • The file must be smaller than 421888 (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: 7626af5e-836e-5022-af48-0023f94f9118

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