Skip to content

YARA · SEKOIA.IO Community

SEKOIA_Backdoor_Xploitspy_Strings

Detects XploitSPY DEX file

MalwareSEKOIA.IO CommunityDetection Rule License 1.1Compiles with YARA-X
Author
Sekoia.io
Date
2022-08-24
Modified
2024-12-19
Score / Quality
75 / 80

What this rule detects

Detects XploitSPY DEX file

It defines 12 patterns (0 text, 12 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

backdoor-xploitspy-strings.yarDetection Rule License 1.1
rule SEKOIA_Backdoor_Xploitspy_Strings : FILE
{
	meta:
		description = "Detects XploitSPY DEX file"
		author = "Sekoia.io"
		id = "0aa86c2e-dba6-4ef4-a47e-f1b43e04f1f3"
		date = "2022-08-24"
		modified = "2024-12-19"
		reference = "https://github.com/SEKOIA-IO/Community"
		source_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/yara_rules/backdoor_xploitspy_strings.yar#L1-L28"
		license_url = "https://github.com/SEKOIA-IO/Community/blob/a438a5901a211c2abdf75da9c93921ef187473d1/LICENSE.md"
		logic_hash = "eabb1dbeaa8aefc33beb7fb158bbd8ad2c5b848d34c99473704da36a6dc461aa"
		score = 75
		quality = 80
		tags = "FILE"
		version = "1.0"
		classification = "TLP:CLEAR"

	strings:
		$ = { 04 30 78 43 42 00 }
		$ = { 04 30 78 43 4C 00 }
		$ = { 04 30 78 43 4F 00 }
		$ = { 04 30 78 46 49 00 }
		$ = { 04 30 78 47 50 00 }
		$ = { 04 30 78 49 4E 00 }
		$ = { 04 30 78 4C 4F 00 }
		$ = { 04 30 78 4D 49 00 }
		$ = { 04 30 78 4E 4F 00 }
		$ = { 04 30 78 50 4D 00 }
		$ = { 04 30 78 53 4D 00 }
		$ = { 04 30 78 57 49 00 }

	condition:
		uint32be( 0 ) == 0x6465780A and filesize < 1MB and 10 of them
}

Strings (12 patterns)

IdentifierTypeValueModifiers
$hex{ 04 30 78 43 42 00 }
$hex{ 04 30 78 43 4C 00 }
$hex{ 04 30 78 43 4F 00 }
$hex{ 04 30 78 46 49 00 }
$hex{ 04 30 78 47 50 00 }
$hex{ 04 30 78 49 4E 00 }
$hex{ 04 30 78 4C 4F 00 }
$hex{ 04 30 78 4D 49 00 }
$hex{ 04 30 78 4E 4F 00 }
$hex{ 04 30 78 50 4D 00 }
$hex{ 04 30 78 53 4D 00 }
$hex{ 04 30 78 57 49 00 }

Condition

uint32be( 0 ) == 0x6465780A and filesize < 1MB and 10 of them

In plain words (Heuristic)

  • The file must be smaller than 1MB (a cheap guard that skips large files).
  • At least 10 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: 0aa86c2e-dba6-4ef4-a47e-f1b43e04f1f3

Metadata

version1.0
classificationTLP:CLEAR

Tags:FILE