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F-Secure description
WildList report

Die_Hard.4000.A
Aliases: DH2

According to reports from F-Secure, Die_Hard exhibits the following characteristics:

Type: Memory-resident COM/EXE file infector
Systems Affected: IBM-compatible PC's
Payload: Displays animation of large 'S' and 'W' characters on the screen. Denies write access to files, displaying "SW Error" message.
ITW: Yes
Origin: India
Description:If a Tuesday falls on the 3rd, 11th, 15th, or 28th of any month and at least thirteen files have been infected, the virus delivers the aforementioned payload.
What to look for:
How to prevent it: Scan all files before introducing them to your computer. Do not share files with friends or download software from untrustworthy sources. See Tips for Safety for details on this and other preventative measures.

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