Threat Description



Category: Malware
Platform: W32
Aliases: Trojan-AIM, Instant Messenger trojan, AIM trojan, ICQ trojan, MSN trojan, Trojan-AOL, Trojan-MSN, Trojan-Yahoo, IM-TROJAN


Instant Messenger Trojan (generic description).

An Instant Messenger Trojan is usually a standalone program that affects a certain Instant Messenger (IM) client. There are a few widely used instant messenger networks - ICQ, MSN, Yahoo!, AOL and a few others. All these networks have specific clients that are available to all subscribers. Some instant messenger clients, for example Trillian, can connect to multiple IM networks.


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More scanning & removal options

More information on scanning or removal options is available in the documentation for your F-Secure security product on the Downloads section of our Home - Global site.

You may also refer to the Knowledge Base on the F-Secure Community site for more information.

Contact Support

For further assistance, F-Secure customers can request support online via the Request support or the Chat forms on our Home - Global site.

Technical Details

Instant Messenger trojans are usually standalone programs that are sent by hackers to their potential victims in e-mails or instant messages. IM trojans are most frequently used to steal user's IM account information. When such trojan is run, it tries to locate an IM client's user information and to send it to a hacker via e-mail or using the existing IM client. That way a hacker gets all data he needs to connect to an IM network using victim's credentials.

Most famous IM trojans: Ypager, Ikmet, Spy, ICQSteal.

Description Details: Alexey Podrezov, July 14th, 2003
Description Last Modified: Alexey Podrezov, November 17th, 2004


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