WORM_DORKBOT.P

This worm arrives by connecting affected removable drives to a system. It may be unknowingly downloaded by a user while visiting malicious websites.

It is injected into all running processes to remain memory resident.

It drops copies of itself in all removable drives. It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

It connects to Internet Relay Chat (IRC) servers.

It performs denial of service (DoS) attacks on affected systems using specific flooding method(s).

It prevents users from visiting antivirus-related websites that contain specific strings.

Arrival Details

This worm arrives by connecting affected removable drives to a system.

It may be unknowingly downloaded by a user while visiting malicious websites.

Installation

This worm drops the following component file(s):

• {removable drive}\recycler.lnk

It creates the following folders:

• {removable drive}\RECYCLER

It is injected into all running processes to remain memory resident.

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

• 1LSJuVlZPsaJ3FWT

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{Malware File Name} = {Malware Path and File Name}

Propagation

This worm drops copies of itself in all removable drives.

It drops an AUTORUN.INF file to automatically execute the copies it drops when a user accesses the drives of an affected system.

The said .INF file contains the following strings:

[autorun]
;{Random String}
shellexecute={Malware Path and File Name}
;{Random String}
action=Open folder to view files
;{Random String}
useautoplay=1
;{Random String}
icon=shell32.dll,7
;{Random String}
shell\explore\command={Malware Path and File Name}
;{Random String}
shell\open\command={Malware Path and File Name}

It sends copies of itself to target recipients using the following instant-messaging (IM) applications:

• MSN
• Pidgin
• Windows Live Messenger

Backdoor Routine

This worm connects to any of the following Internet Relay Chat (IRC) servers:

• {BLOCKED}enial.com
• {BLOCKED}ebsite.com
• {BLOCKED}ctronix.com
• {BLOCKED}s.com

Denial of Service (DoS) Attack

This worm performs denial of service (DoS) attacks on affected systems using the following flooding method(s):

• Slowloris Flood
• UDP Flood
• SYN Flood

Other Details

This worm connects to the following URL(s) to get the affected system's IP address:

• http://api.wipmania.com

It prevents users from visiting antivirus-related websites that contain the following strings:

• avast.
• avira.
• bitdefender.
• bullguard.
• clamav.
• comodo.
• emsisoft.
• eset.
• f-secure.
• fortinet.
• garyshood.
• gdatasoftware.
• heck.tc
• iseclab.
• jotti.
• kaspersky.
• lavasoft.
• malwarebytes.
• mcafee.
• norman.
• norton.
• novirusthanks.
• onecare.live.
• onlinemalwarescanner.
• pandasecurity.
• precisesecurity.
• sophos.
• sunbeltsoftware.
• symantec
• threatexpert.
• trendmicro.
• virscan.
• virus.
• virusbuster.nprotect.
• viruschief.
• virustotal.
• webroot.
• avast.
• avira.
• bitdefender.
• bullguard.
• clamav.
• comodo.
• emsisoft.
• eset.
• f-secure.
• fortinet.
• garyshood.
• gdatasoftware.
• heck.tc
• iseclab.
• jotti.
• kaspersky.
• lavasoft.
• malwarebytes.
• mcafee.
• norman.
• norton.
• novirusthanks.
• onecare.live.
• onlinemalwarescanner.
• pandasecurity.
• precisesecurity.
• sophos.
• sunbeltsoftware.
• symantec
• threatexpert.
• trendmicro.
• virscan.
• virus.
• virusbuster.nprotect.
• viruschief.
• virustotal.
• webroot.