TROJ_DROPPER.QUB

This Trojan may be dropped by other malware.

It deletes the initially executed copy of itself.

Arrival Details

This Trojan may be dropped by the following malware:

• TROJ_DROPPI.PDF
• TROJ_PIDIEF.FUA

Installation

This Trojan drops the following files:

• %User Profile%\Application Data\Adobe\Acrobat_sl.exe - BKDR_DEMTRANC.DK

(Note: %User Profile% is the current user's profile folder, which is usually C:\Windows\Profiles\{user name} on Windows 98 and ME, C:\WINNT\Profiles\{user name} on Windows NT, and C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003.)

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

• %User Temp%\Del{random number}.tmp

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003.)

Autostart Technique

This Trojan creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Acrobat Updater = "%User Profile%\Application Data\Adobe\Acrobat_sl.exe"

Other System Modifications

This Trojan adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
.dll = "{blank}"

Other Details

This Trojan deletes the initially executed copy of itself