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MALPEDIA_Win_Spyeye_Auto

autogenerated rule brought to you by yara-signator

MalwareSpyeyeMalpedia 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: Spyeye.

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

Summary generated from the rule's metadata and condition.

Rule source

win-spyeye-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Spyeye_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "7acec03f-b3d0-5d4c-99bd-81bbbc387c23"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.spyeye"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.spyeye_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "c7df17da41575a42bb6bae2d56fd1cf96601d88e57dadd5c077a5d6580f53e29"
		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 = { 8965fc ff7514 ff7510 ff750c ff7508 ffd0 }
		$sequence_1 = { 8d45e8 50 8d45e0 50 53 e8???????? 85c0 }
		$sequence_2 = { ff750c ff7508 ffd0 8b65fc }
		$sequence_3 = { 81fbffffff7f 7509 56 57 e8???????? 8bd8 3bde }
		$sequence_4 = { 56 57 8b7d08 57 e8???????? 83f8ff }
		$sequence_5 = { 740e 837dfcff 7408 ff75fc e8???????? }
		$sequence_6 = { 837dfcff 7408 ff75fc e8???????? 3bdf }
		$sequence_7 = { 57 6a01 be00000040 56 ff750c e8???????? }
		$sequence_8 = { 53 e8???????? 85c0 7407 c745f801000000 397dfc }
		$sequence_9 = { ff7508 ffd0 8b65fc c9 c20400 55 }

	condition:
		7 of them and filesize < 741376
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8965fc ff7514 ff7510 ff750c ff7508 ffd0 }
$sequence_1hex{ 8d45e8 50 8d45e0 50 53 e8???????? 85c0 }
$sequence_2hex{ ff750c ff7508 ffd0 8b65fc }
$sequence_3hex{ 81fbffffff7f 7509 56 57 e8???????? 8bd8 3bde }
$sequence_4hex{ 56 57 8b7d08 57 e8???????? 83f8ff }
$sequence_5hex{ 740e 837dfcff 7408 ff75fc e8???????? }
$sequence_6hex{ 837dfcff 7408 ff75fc e8???????? 3bdf }
$sequence_7hex{ 57 6a01 be00000040 56 ff750c e8???????? }
$sequence_8hex{ 53 e8???????? 85c0 7407 c745f801000000 397dfc }
$sequence_9hex{ ff7508 ffd0 8b65fc c9 c20400 55 }

Condition

7 of them and filesize < 741376

In plain words (Heuristic)

  • The file must be smaller than 741376 (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: 7acec03f-b3d0-5d4c-99bd-81bbbc387c23

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