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MALPEDIA_Win_Iispy_Auto

autogenerated rule brought to you by yara-signator

MalwareIispyMalpedia 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: Iispy.

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

Summary generated from the rule's metadata and condition.

Rule source

win-iispy-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Iispy_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "deb63250-fcc0-5cfe-be30-ff47ced8d3d1"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.iispy"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.iispy_auto.yar#L1-L129"
		license_url = "N/A"
		logic_hash = "a71e9708e64937fd85e928d51eb078aab35675e0d1194499d40fdb1e597ac38a"
		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 = { 85c0 7514 8b75c0 8bd6 8b4dbc }
		$sequence_1 = { 8a044dc1820210 8806 8d4601 5f 5e 5b 8be5 }
		$sequence_2 = { 8b17 8bd8 6a20 8bcf 895dc4 ff5248 }
		$sequence_3 = { 85c0 742b 8bf0 3b4708 7414 8b7008 50 }
		$sequence_4 = { 8b4c2410 8d044502000000 50 ff5248 33d2 8944243c }
		$sequence_5 = { 89480c 84db 7466 c6025c 8b16 8b4a0c }
		$sequence_6 = { 03c2 c1c005 03c6 8901 8bc1 8b4808 8bd1 }
		$sequence_7 = { 8b0f 85c9 0f843b040000 85c0 750a b808000780 e9???????? }
		$sequence_8 = { 8a65f7 32c6 32c4 894dc8 3245f9 8aee 3245fb }
		$sequence_9 = { 0fb7ff 81cf00000780 e9???????? 8d45c4 50 6a00 6a04 }

	condition:
		7 of them and filesize < 397312
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 85c0 7514 8b75c0 8bd6 8b4dbc }
$sequence_1hex{ 8a044dc1820210 8806 8d4601 5f 5e 5b 8be5 }
$sequence_2hex{ 8b17 8bd8 6a20 8bcf 895dc4 ff5248 }
$sequence_3hex{ 85c0 742b 8bf0 3b4708 7414 8b7008 50 }
$sequence_4hex{ 8b4c2410 8d044502000000 50 ff5248 33d2 8944243c }
$sequence_5hex{ 89480c 84db 7466 c6025c 8b16 8b4a0c }
$sequence_6hex{ 03c2 c1c005 03c6 8901 8bc1 8b4808 8bd1 }
$sequence_7hex{ 8b0f 85c9 0f843b040000 85c0 750a b808000780 e9???????? }
$sequence_8hex{ 8a65f7 32c6 32c4 894dc8 3245f9 8aee 3245fb }
$sequence_9hex{ 0fb7ff 81cf00000780 e9???????? 8d45c4 50 6a00 6a04 }

Condition

7 of them and filesize < 397312

In plain words (Heuristic)

  • The file must be smaller than 397312 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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Open in editor

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: deb63250-fcc0-5cfe-be30-ff47ced8d3d1

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