As a result, it cannot be detected by virus-scanning software or junk email filters. In essence, you're doing the work of a destructive virus yourself. The hoax message indicates that the virus is scheduled to trigger June 1, has been found on every PC in somebody's office, and is not detectable with virus software. Sulfnbk.exe is a Microsoft Windows utility that is used to restore long file names, according to Symantec, and deleting it could cause that feature to stop working properly. An earlier variant warned that the virus would activate May 25.
Experts believe the propagation of the sulfnbk.exe e-mail is caused mainly by confusion.
Symantec's Bunker said there are several easy clues to detect bogus virus warnings. In addition, phrases warning that a supposed virus will absolutely destroy everything on a hard disk should be taken with a pinch of salt, as should those suggesting there is no known fix. It was brought to my attention that this virus is in circulation via e-mail. I found it on my computer as well as everyone else's in my office. The e-mail then goes on to give a detailed list of instructions on how to delete the sulfbnk.exe file.