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ERNW White Paper 71

Analysis of Anti-Virus Software Quarantine Files

Anti-virus software (AV software) is a type of computer software that tries to identify malicious software and to prevent it from running. Since anti-virus software may wrongfully identify harmless files as malicious (false positives), AV software makes use of quarantining files. If a file is put into quarantine by an AV software, the AV software removes the original suspected malicious file and stores a modified obfuscated version in another location.

In this paper, the quarantine files of different AV software solutions were analyzed. The encryption and obfuscation methods were documented (including encryption keys) and parsers created using Kaitai Struct.



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