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MALPEDIA_Win_Spygrace_Auto

autogenerated rule brought to you by yara-signator

MalwareSpygraceMalpedia 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: Spygrace.

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

Summary generated from the rule's metadata and condition.

Rule source

win-spygrace-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Spygrace_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "1c1fe014-1102-5578-bc7d-079a9011a6e2"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.spygrace"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.spygrace_auto.yar#L1-L130"
		license_url = "N/A"
		logic_hash = "6e55f9093d424c6d2765e46b0480ae56daf5fc27c377637de7ac7a628aa7f53f"
		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 = { 488d8a30000000 e9???????? 488d8a90000000 e9???????? 488d8ae8000000 e9???????? 488d8aa8000000 }
		$sequence_1 = { eb1e 488bc3 498784f640380600 4885c0 7409 488bcb ff15???????? }
		$sequence_2 = { 7203 488b12 488bcb e8???????? 488d93c0020000 48396a18 7203 }
		$sequence_3 = { c645df00 488b5517 4883fa10 722e 48ffc2 488b4dff 488bc1 }
		$sequence_4 = { 488b55a0 483bd7 0f829e050000 48ffc2 488b4d88 }
		$sequence_5 = { 44887c2468 488b542458 4883fa10 722e 48ffc2 488b4c2440 488bc1 }
		$sequence_6 = { 48035708 0fb60a 83e10f 4c8d05e8b8fdff 4a0fbe8401d8510400 420fb68c01e8510400 482bd0 }
		$sequence_7 = { 90 488d4dcf e8???????? 8bc3 488b4d0f 4833cc e8???????? }
		$sequence_8 = { 488d542478 488d4d40 e8???????? 488b5590 483bd6 7232 }
		$sequence_9 = { f30f7f4537 c6452700 488365c700 660f7f45d7 c645c700 488365e700 }

	condition:
		7 of them and filesize < 865280
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488d8a30000000 e9???????? 488d8a90000000 e9???????? 488d8ae8000000 e9???????? 488d8aa8000000 }
$sequence_1hex{ eb1e 488bc3 498784f640380600 4885c0 7409 488bcb ff15???????? }
$sequence_2hex{ 7203 488b12 488bcb e8???????? 488d93c0020000 48396a18 7203 }
$sequence_3hex{ c645df00 488b5517 4883fa10 722e 48ffc2 488b4dff 488bc1 }
$sequence_4hex{ 488b55a0 483bd7 0f829e050000 48ffc2 488b4d88 }
$sequence_5hex{ 44887c2468 488b542458 4883fa10 722e 48ffc2 488b4c2440 488bc1 }
$sequence_6hex{ 48035708 0fb60a 83e10f 4c8d05e8b8fdff 4a0fbe8401d8510400 420fb68c01e8510400 482bd0 }
$sequence_7hex{ 90 488d4dcf e8???????? 8bc3 488b4d0f 4833cc e8???????? }
$sequence_8hex{ 488d542478 488d4d40 e8???????? 488b5590 483bd6 7232 }
$sequence_9hex{ f30f7f4537 c6452700 488365c700 660f7f45d7 c645c700 488365e700 }

Condition

7 of them and filesize < 865280

In plain words (Heuristic)

  • The file must be smaller than 865280 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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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: 1c1fe014-1102-5578-bc7d-079a9011a6e2

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