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In the wild:
Method of propagation:
• No own spreading routine
It was previously detected as:
• Makes use of software vulnerability
EXP/ASF.GetCodec.Gen is a detection for multimedia files that contain a special command to download new codecs. Normally, codecs are required to play video or audio formats. This mechanism got hijacked by malware, which simply downloads Trojans instead of a real new codec. ASF, WMA and WMV files are affected, a recent Trojan converts MP3 files into the ASF file format and adds a command to download malicious code. The Wimad Trojan family also uses this method.
The following engine updates were released in order to enhance detection:
• 7.08.01.18 ( 06/08/2008 )
• 7.09.00.04 ( 15/10/2008 )
Description inserted by Andrei Gherman on Thursday, October 16, 2008
Description updated by Andrei Ivanes on Monday, October 20, 2008