Panda Security’s July 31, 2009 Report on Viruses and Intruders

Courtesy of Panda Security. Panda Security’s weekly report on viruses and intruders.

This week’s PandaLabs report looks at the Koobface.EA worm, designed to spread using Facebook, the Pidief.A Trojan, which takes advantage of an Adobe vulnerability to infect users, and P2Pworm.BJ, a worm designed to steal information entered on online forms.

To spread via Facebook, the Koobface.EA worm publishes a video on the infected users’ Facebook page, for all their friends and contacts to see it. On trying to watch the video, users are redirected to a page similar to YouTube’s.

Then, they are asked to download an Adobe Flash version necessary to watch the video. This file is actually a copy of the worm.

To make the attack even more dangerous, the worm downloads another malicious code to the infected computer: the AntiSpyware Pro 2009 fake antivirus.

This malicious adware simulates a fake system scan detecting dozens of non-existing malware strains. Then, it offers users the option to eliminate them using a paid version of the fake antivirus. As you can see, the objective is to get financial returns from this malicious code.


The Pidief.A Trojan uses the Adobe CVE-2009-1862 vulnerability to infect users. The exploit takes advantage of a known vulnerability when trying to open a PDF document with an embedded flash object.

The Acrobat file viewer has a feature to run flash objects included in .PDF files. Thanks to the authplay.dll library, the file reader can open the flash viewer and display the content. In this case, the information sent to the viewer includes the instruction to download a malware file (Trj/Pidief.A).

Pidief.A can be used by its creator to download more malware to the affected computer, or to gain total or partial control of the infected system.

P2Pworm.BJ is a worm designed to steal the information entered on online forms through Internet Explorer and Firefox browsers.

The worm uses the following means to spread:

Peer-to-peer (P2P) file sharing programs: It creates copies of itself in the shared directories of several programs (Ares, BearShare, Emule, Imesh and Shareaza).

The users of these programs can access the shared directories remotely and download some of the files belonging to P2Pworm.BJ to their computers.

Removable drives: It copies itself to the RECYCLER folder of removable drives. Also, it creates an AUTORUN.INF file on these drives to run every time they are accessed.

MSN Messenger: It sends messages with a copy of itself to the user’s contacts connected at the time of the infection.

More information about these and other malicious codes is available in the Panda Security Encyclopedia.

You can follow Panda Security’s activity online on Twitter, and the PandaLabs blog.

If you enjoyed this article, why not subscribe to this Blog via RSS, or email? It’s easy; just click on this link and you’ll never miss another Tech Thoughts article.


Filed under Adobe, Application Vulnerabilities, Don't Get Scammed, Don't Get Hacked, Interconnectivity, Internet Safety, Internet Security Alerts, Malware Advisories, Panda Security, PandaLabs, Peer to Peer, Rogue Software, social networking, Windows Tips and Tools

4 responses to “Panda Security’s July 31, 2009 Report on Viruses and Intruders

  1. Pingback: Panda Security's July 31, 2009 Report on Viruses and Intruders … « Security

  2. Pingback: Panda Security's July 31, 2009 Report on Viruses and Intruders … « Security

  3. Good to see that people still know what they are talking about. So much BS around these days!