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The ‘CHAD.com’ DOS virus, which emerged in the early 1990s, was notable for its distribution method via email attachments, making it one of the earliest email-borne viruses. Disguised as a harmless program, it spread rapidly by infecting executable files and replicating itself through email attachments. Upon execution, the virus displayed a message on the screen, often urging users to share the infected file further. Its impact underscored the growing threat of email-borne malware and highlighted the importance of email security measures in preventing its spread.
