This malware is distributed as a malicious Microsoft Excel document attached to an e-mail message. The malicious Excel file itself is detected with the Generic Detection Exploit.D-Encrypted.Gen.
The Excel file contains an embedded encrypted executable file. It also contains an embedded Flash (.swf) file maliciously modified to exploit a known vulnerability (CVE-2011-0609) in certain older, unpatched versions of Adobe Flash player.
The Flash file decrypts the embedded executable file (detected as Trojan.Agent.ARKJ), which is the real payload for this malware.
Once decrypted, the trojan attempts to connect to and download additional files from:
At the time of writing, the malware appears unable to find the target files.
Further information on the exploit used is available at:
- Security Advisory for Adobe Flash Player, Adobe Reader and Acrobat: http://www.adobe.com/support/security/advisories/apsa11-01.html