Welcome to the Virus Encyclopedia of Panda Security.
It spreads and affects other computers.
It sends the information it has captured to a remote user.
It mass mails junk mail (spam).
It changes the security settings of Internet Explorer.
It uses stealth techniques to avoid being detected by the user.
It uses anti-monitoring techniques in order to prevent it being detected by antivirus companies.
, via email, via mapped drives.
|First detected on:||June 9, 2007|
|Detection updated on:||June 9, 2007|
|Yes, using TruPrevent Technologies
Grum.J is a worm that spreads by copying itself, without infecting other files.
It captures certain information entered or saved by the user, with the corresponding threat to privacy:
It sends the gathered information to a remote user by any available means: email, FTP, etc.
- On remote sites: it mass mails junk mail (spam).
It reduces the security level of the computer:
it changes the security settings of Internet Explorer, decreasing its security level.
It uses stealth techniques to avoid being detected by the user:
- It uses techniques included in its code to hide itself while it is active.
- It modifies system permissions in order to hide itself.
It uses several methods in order to avoid detection by antivirus companies:
- It terminates its own execution if it detects that it is being executed in a virtual machine environment, such as VMWare or VirtualPC.
- It terminates its own execution if it detects that a debugging program is active.
Grum.J uses the following propagation or distribution methods:
- Exploiting vulnerabilities with the intervention of the user: exploiting vulnerabilities in file formats or applications. To exploit them successfully it needs the intervention of the user: opening files, viewing malicious web pages, reading emails, etc.
- Email: sending emails that include a copy of itself as an attachment. The computer is infected when the attachment is run.
- Computer networks (mapped drives): it creates copies of itself in mapped drives.