Skip to content
yararules.org
Menu

YARA · SEKOIA.IO Community

SEKOIA_Apt_Sidecopy_Reverserat_Strings

Detects SideCopy's ReverseRAT

APT / threat actorReverseratSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2023-05-11
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects SideCopy's ReverseRAT

Associated malware family: Reverserat.

Targets: Windows PE.

It defines 8 patterns (8 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
apt-sidecopy-reverserat-strings.yarDetection Rule License 1.1
rule SEKOIA_Apt_Sidecopy_Reverserat_Strings : FILE
{
	meta:
		description = "Detects SideCopy's ReverseRAT"
		author = "Sekoia.io"
		id = "383397c9-fd4a-4255-a8f2-27683bdbb7f7"
		date = "2023-05-11"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/apt_sidecopy_reverserat_strings.yar#L1-L23"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "be657405b5703dc402b53350aa7ef18529bda3dc44c759585c4cfa1bc1eb76ff"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = "downloadexe" wide
		$ = "creatdir" wide
		$ = "regnewkey" wide
		$ = "reglist" wide
		$ = "regdelkey" wide
		$ = "clipboardset" wide
		$ = "shellexec" wide
		$ = "SELECT maxclockspeed,  datawidth, name, manufacturer FROM Win32_Processor" wide

	condition:
		uint16be( 0 ) == 0x4d5a and all of them
}

Strings (8 patterns)

IdentifierTypeValueModifiers
$text"downloadexe"wide
$text"creatdir"wide
$text"regnewkey"wide
$text"reglist"wide
$text"regdelkey"wide
$text"clipboardset"wide
$text"shellexec"wide
$text"SELECT maxclockspeed, datawidth, name, manufacturer FROM Win32_Processor"wide

Condition

uint16be( 0 ) == 0x4d5a and all of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • All patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

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

Open in editor

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: 383397c9-fd4a-4255-a8f2-27683bdbb7f7

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE

Related rules

More Reverserat rules