TROJ_CHAPAK.NQKD

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

Arrival Details

This Trojan 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 drops the following files:

• %User Temp%\{random characters}.bat

(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 drops the following copies of itself into the affected system:

• Application Data%\ActiveState\ActivePerl 5.24.0 Build 2400 5.24.2400\install\A115E28\lib\Moose\Meta\Method\Accessor\Native\Array\INSTALLBGINFO.VBS.exe

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
INSTALLBGINFO.VBS.exe = Application Data%\ActiveState\ActivePerl 5.24.0 Build 2400 5.24.2400\install\A115E28\lib\Moose\Meta\Method\Accessor\Native\Array\INSTALLBGINFO.VBS.exe

Other Details

This Trojan connects to the following possibly malicious URL:

• {BLOCKED}.{BLOCKED}.81.13