WORM_QBOT.JBR

This worm arrives by connecting affected removable drives to a system. It arrives by accessing affected shared networks. It 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 worm arrives by connecting affected removable drives to a system.

It arrives by accessing affected shared networks.

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 worm drops the following component file(s):

• %Application Data%\Microsoft\{random}\{random}.dll

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

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

• %Application Data%\Microsoft\{random}\{random}.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

It creates the following folders:

• %Application Data%\Microsoft\{random}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{random} = "%Application Data%\Microsoft\{random}\{random}.exe"

It modifies the following registry entry(ies) to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{legitimate application} = "%Application Data%\Microsoft\{random}\{random}.exe /c {path and file name of legitimate application}"

(Note: The default value data of the said registry entry is "{path and file name of legitimate application}".)

Propagation

This worm drops the following copy(ies) of itself in all removable drives:

• {random filename}.{random extension}

It uses the following file names for the copies it drops into shared networks:

• {random filename}.{random extension}

Other Details

This worm connects to the following possibly malicious URL:

• zoas.{BLOCKED}v.ua
• olaum.{BLOCKED}v.ua
• {BLOCKED}cn.org
• {BLOCKED}nz.net
• {BLOCKED}mausj.org
• {BLOCKED}tkrich.net
• {BLOCKED}carusled.org

NOTES:
It drops the shortcut link {random}.LNK in all shared networks or removable drives in order to automatically execute its dropped copy.