NetSarang Xshell 5 Backdoor Trojan (ShadowPad)

Critical Nessus Plugin ID 102713


The remote host contains an application that is affected by a trojan backdoor.


The Xshell 5, a terminal emulator for Windows, installed on the remote host has a nssock2.dll file identified by its MD5 hash that is infected with a trojan backdoor.

The affected file includes an encrypted payload that could be remotely activated by a knowledgeable attacker.


Upgrade to Xshell 5 Build 1326 or later.

See Also

Plugin Details

Severity: Critical

ID: 102713

File Name: netsarang_xshell_5_trojan.nasl

Version: $Revision: 1.2 $

Type: local

Agent: windows

Family: Windows

Published: 2017/08/23

Modified: 2017/08/24

Dependencies: 13855

Risk Information

Risk Factor: Critical


Base Score: 10

Temporal Score: 8.3

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: CVSS2#E:F/RL:OF/RC:ND


Base Score: 9.8

Temporal Score: 9

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:F/RL:O/RC:X

Vulnerability Information

Required KB Items: SMB/Registry/Enumerated

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2017/08/05

Vulnerability Publication Date: 2017/08/04

Reference Information

OSVDB: 163510