Defeating A/V by inserting forged data

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Defeating A/V by inserting forged data
Andrey Bayora (GCIH, dontja know) has released an advisory regarding an insertion-style attack to slide certain malicious content past many antivirus products. http://www.securityelf.org/magicbyteadv.html and the accompanying white paper http://www.securityelf.org/magicbyte.html describe fooling text-parsing routines by prepending executeable-looking file headers. The additional data is ignored by the victim's system, while the A/V sees it and stops evaluating the file before encountering the malicious script, code, etc. Andrey has let us know he has been contacted by some vendors, and that he is aware that Trend has issued a letter to their customers on this issue. I will be teaching next: Intrusion Detection In-Depth - SANS Las Vegas Spring 2020	Johannes 3838 Posts ISC Handler
Subscribe	Oct 29th 2005 1 decade ago