TROJ_INJECTR.ZJDK-C

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It does not have any propagation routine.

It connects to a website to send and receive information.

It steals certain information from the system and/or the user.

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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 Trojan adds the following mutexes to ensure that only one of its copies runs at any one time:

• a85edfea9aa3f292

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
%Application Data%\Notron.exe = ISC Croot Reader

Propagation

This Trojan does not have any propagation routine.

Backdoor Routine

This Trojan connects to the following websites to send and receive information:

• http://area.{BLOCKED}helpdesk.com/{random path}.html

Information Theft

This Trojan steals the following information:

• Computer Name
• Explorer File Version
• Network Proxy Settings
• Network Proxy HTTP
• Network Proxy HTTP port
• Network Proxy FTP
• Network Proxy Auto Configuration
  (It steals Network Proxy Related Information by querying Firefox's prefs.js)
• Windows Credentials

Other Details

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

• %User Temp%/wpad.dat - It will use this file to gather the network proxy if "prefs.js" doesn't have any network proxy related information.

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It does the following:

• It uses a word document icon and opens a decoy non-malicious document file ({current malware path and malware name}.docx) during execution in an attempt to hide its execution and avoid suspicion
• It moves and renames itself to %Application Data%\Notron.exe

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

NOTES:

It does not have rootkit capabilities.

It does not exploit any vulnerability.