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SEKOIA_Apt_Cloudatlas_Rtf_Shellcode_Cve_2018_0798

CloudAtlas Shellcode for CVE_2018_0798

APT / threat actorSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2022-12-01
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

CloudAtlas Shellcode for CVE_2018_0798

It defines 1 patterns (1 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

apt-cloudatlas-rtf-shellcode-cve-2018-0798.yarDetection Rule License 1.1
rule SEKOIA_Apt_Cloudatlas_Rtf_Shellcode_Cve_2018_0798 : FILE
{
	meta:
		description = "CloudAtlas Shellcode for CVE_2018_0798 "
		author = "Sekoia.io"
		id = "6c602c66-df40-4436-800f-e548dacc1e81"
		date = "2022-12-01"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_cloudatlas_rtf_shellcode_cve_2018_0798.yar#L1-L16"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "a8c320ca81ef196b84a8fb08d9e02ef8cfb338024fa7e6776ff6c8c049b8e63c"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$s1 = "6060606061616161616161616161616161616161FB0B00004bE8FFFFFFFFC35F83C71B33C966B908010f0d00ddd8d97424f4668137" ascii nocase

	condition:
		filesize < 8MB and all of them
}

Strings (1 patterns)

IdentifierTypeValueModifiers
$s1text"6060606061616161616161616161616161616161FB0B00004bE8FFFFFFFFC35F83C71B33C966B908010f0d00ddd8d97424f4668137"ascii nocase

Condition

filesize < 8MB and all of them

In plain words (Heuristic)

  • The file must be smaller than 8MB (a cheap guard that skips large files).
  • All patterns in the rule must match.

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References

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: 6c602c66-df40-4436-800f-e548dacc1e81

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE