Labels:text | screenshot | font OCR: Undetectable Viruses By SIA [03-10-96] S#4-19a It's very clear that the virus scanners cannot keep up with the new encryption programs which viruses are hidden. For example, novice users often just simply scan, and if the scanner says that there is nothing wrong with your file, he/she usually runs the file, and without warning, a virus takes over a victim's hard drive. What was wrong with that user's precaution techn- iques? Picture this, a state trooper tries to use his radar on high-speed sports cars, but his radar states that the car is not speeding, even though it is speeding. Its the same way with viruses, most viruses these days cannot be detected by even the most sophisticated virus scanners, here are the reasons why: a. Batch file virus b. Compressed by LZEXE, PKLite, or other .EXE compressors. c. Encrypted by PROTECT or other .EXE encrypters. d. New signatures Batch file viruses are rarely seen these days, but they do exist, some batch viruses have been converted into .EXE and .COM files, the safest way to detect these kinds of viruses is by using a hex editor or even a plain text editor for .BAT files. Compressed executable files which contains virus signatures can hardly be detected, since the whole .EXE file is compressed and some of the coding becomes "static" to your virus scanner, one safe way of detecting viruses off compressed executables is by using an decompressor, such as UNP. Encrypted virus executable files has also the same effect as compressed virus executables, SIA suggests UNP's sophisticated techniques of decrypting and decompressing these files, and then run your favorite virus scanner. Most of the new virus scanner products can detect new virus signatures, though be warned, not all virus scanners are perfect. Always look for the most up-to-date virus scanner data(s) for your virus scanner. Sometimes, upgrades cost from nothing to $30. It's better to be safe, than demolished. SIA is a non-profit organization outlined to provide the normal computer users with information concerning illegal activities and the dangers of cyberspace.
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