"Vircing" the InVircible: 4. The Decoy Launcher (IVTEST).
Submitted by dmuth on Fri, 2006-02-24 12:21.
Papers
4. The Decoy Launcher (IVTEST). As was explained in the section about InVircible's self-checking algorithms, most programs from the package use simple decoy launching (of 6-byte long COM files) to detect whether a virus might be resident and active in memory. As noted there, this algorithm will fail to detect slow viruses that do not infect COM files or that infect only COM files larger than 6 bytes. In attempt to improve this situation, InVircible provides a separate program - IVTEST - which performs a somehow advanced decoy launching (using the AdvancedDecoyLaunch algorithm, explained in section 2.3.4). The documentation suggests the user to include invocations of this program in the often used batch files. The "improvements" in IVTEST's algorithm consist in additionally creating 8 Kb long COM decoys and also in creating EXE decoys with the length of 516 bytes. Unfortunately, avoiding to infect those is just as trivial as the "simple" decoys, and therefore does not provide any significant increase in the protection offered to the user.
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