BKDR64_ZXSHELL.WNV

 Analysis by: Jennifer Gumban

 ALIASES:

Backdoor:Win64/Zxshell.A!dha (Microsoft)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This backdoor may arrive bundled with malware packages as a malware component. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

1,294,840 bytes

File Type:

DLL

Initial Samples Received Date:

05 Nov 2015

Arrival Details

This backdoor may arrive bundled with malware packages as a malware component.

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This backdoor drops the following file(s)/component(s):

  • %Windows%\Tasks\SCHEDLGU.TXT
  • %Windows%\setupact.log

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)