YARA · SEKOIA.IO Community

SEKOIA_Apt_Icepeony_Iceevent

Detects IceEvent Backdoor

APT / threat actorIce EventSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X

Author: Sekoia.io
Date: 2024-10-21
Modified: 2024-12-19
Score / Quality: 75 / 80

What this rule detects

Detects IceEvent Backdoor

Associated malware family: Ice Event.

Targets: Windows PE.

It defines 5 patterns (5 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar

apt-icepeony-iceevent.yarDetection Rule License 1.1

rule SEKOIA_Apt_Icepeony_Iceevent : FILE
{
	meta:
		description = "Detects IceEvent Backdoor"
		author = "Sekoia.io"
		id = "7d1f8b90-fde4-4d5c-a8a3-375db8aa88a1"
		date = "2024-10-21"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_icepeony_iceevent.yar#L1-L24"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		hash = "07c291c9cea4430676c303128bbbb8e3"
		hash = "489b573b37ab8bc74cca3704e723b895"
		hash = "265f6cf778d26e62903fb295f89507e3"
		hash = "f5eb28dd29c91cc84818b74d7f138ff6"
		logic_hash = "8afe4a94513e9aa5d20849153c76cfe5c684c9a529710947930c76098a36540e"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "Created a process" ascii fullword
		$ = "CreateProcess failed: %d"
		$ = "bind error:"
		$ = "Error creating pip: %d"
		$ = "listen error:"

	condition:
		uint16be( 0 ) == 0x4d5a and 4 of them and filesize < 500KB
}

Strings (5 patterns)

Identifier	Type	Value	Modifiers
$	text	"Created a process"	ascii fullword
$	text	"CreateProcess failed: %d"
$	text	"bind error:"
$	text	"Error creating pip: %d"
$	text	"listen error:"

Condition

uint16be( 0 ) == 0x4d5a and 4 of them and filesize < 500KB

In plain words (Heuristic)

The file must start with “MZ” — a Windows executable (PE).
The file must be smaller than 500KB (a cheap guard that skips large files).
At least 4 patterns in the rule must match.

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

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References

https://github.com/SEKOIA-IO/Community

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

07c291c9cea4430676c303128bbbb8e3
489b573b37ab8bc74cca3704e723b895
265f6cf778d26e62903fb295f89507e3
f5eb28dd29c91cc84818b74d7f138ff6

Licence & attribution

Author: Sekoia.io

Source repository: SEKOIA.IO Community @ a438a5901a

Licence: Detection Rule License 1.1 (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 7d1f8b90-fde4-4d5c-a8a3-375db8aa88a1

Metadata

version	1.0
classification	TLP:CLEAR

Tags:FILE

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