This Trojan may be downloaded as one of the following files:
When the Trojan is executed, it copies itself to the following location:
Next, the Trojan drops an embedded kernel driver to the following location:
It then attempts to infect the following legitimate Windows driver with a copy of Trojan.Peacomm!inf
It also attempts to infect the cached copy of the above driver:
The infected driver is also copied to the following locations:
The Trojan then ends and waits for the user to restart the computer.
When the computer is restarted, the file kbdclass.sys is loaded.
The infected driver then loads the following file:
The above file injects itself into the following process:
It also has rootkit functionalities to hide the following process:
The rootkit also hides the following files:
It also disables the following security-related software:
- ZoneAlarm Firewall
- PC Watchdog Systems
- Bcfilter Jetico Personal Firewall
- Outpost Firewall
- McAfee Anti Spyware
- McAfee Internet Security Suite
- FSecure Black Light
- Kaspersky Anti Virus
- Symantec Anti Virus
- BitDefender Anti Virus
- FSecure Anti Virus
- Microsoft Anti Spyware
- InterCheck Monitor
- NOD32 Anti Virus
- Panda Anti Virus
The Trojan then checks for the presence of VMWare or VirtualPC. If one of these virtual machines is detected, the Trojan enters an infinite loop and does nothing.
If the above virtual machines are not present, the Trojan creates the following event to ensure that only one copy of the threat is running on the computer:
The Trojan then drops an encrypted list of initial peers to the following configuration file:
It registers the compromised computer as a peer in the existing file-sharing network, using the Overnet protocol by connecting to the peers specified in the initial peer list. It uses a randomly chosen UDP port to communicate with the other peers.
The file-sharing network can then be used by a remote attacker as a back door to gain access to the compromised computer.
The Trojan then steals operating system information from the compromised computer.
It also harvests email addresses from the computer by searching for files with the following extensions:
The Trojan then sends spam emails by using its own SMTP engine.
It does not send emails to email addresses containing the following strings:
The Trojan steals information from the following registry subkey, which contains a unique ID for the computer on the file-sharing network:
Search for files with the following extensions:
It then injects an iframe tag into all of the files that it finds. The iframe tag attempts to load malicious .html files in an attempt to spread itself.
The Trojan may then download and execute potentially malicious files on to the compromised computer.
Symantec Security Response encourages all users and administrators to adhere to the following basic security "best practices":