Name:
Jerusalem
Also known as:
A-204, 1808(EXE), 1813(COM), ArabStar, BlackBox, BlackWindow, Friday13th, HebrewUniversity, Israeli, PLO, Russian
Type:
File infector
Affects:
PCs
Discovered:
October 1, 1987
Note: the Jerusalem virus was originally thought to have originated in Israel as it was first discovered in a Hebrew university there. However, antivirus researchers received new evidence in 1991 that points to Italy as being the originating country.
Description:
The Jerusalem virus is one of the older and certainly one of the more commonly known viruses. Several variants of Jerusalem exist, infecting both .EXE and .COM files found on the system. The first of the Jerusalem viruses contained a bug that caused it to repeatedly infect the EXE files over and over, until eventually the file sizes overwhelmed computer resources.
Jerusalem has a malicious payload that activates each Friday the 13th, deleting any programs run on that day. The virus causes a general slowdown of the computer thirty minutes after an infected program is run and also causes the screen to roll up two lines. Some minor variants of Jerusalem do not cause the screen anomaly, making their presence harder to detect by the naked eye.
Vendor Descriptions:
Jerusalem
Also known as:
A-204, 1808(EXE), 1813(COM), ArabStar, BlackBox, BlackWindow, Friday13th, HebrewUniversity, Israeli, PLO, Russian
Type:
File infector
Affects:
PCs
Discovered:
October 1, 1987
Note: the Jerusalem virus was originally thought to have originated in Israel as it was first discovered in a Hebrew university there. However, antivirus researchers received new evidence in 1991 that points to Italy as being the originating country.
Description:
The Jerusalem virus is one of the older and certainly one of the more commonly known viruses. Several variants of Jerusalem exist, infecting both .EXE and .COM files found on the system. The first of the Jerusalem viruses contained a bug that caused it to repeatedly infect the EXE files over and over, until eventually the file sizes overwhelmed computer resources.
Jerusalem has a malicious payload that activates each Friday the 13th, deleting any programs run on that day. The virus causes a general slowdown of the computer thirty minutes after an infected program is run and also causes the screen to roll up two lines. Some minor variants of Jerusalem do not cause the screen anomaly, making their presence harder to detect by the naked eye.
Vendor Descriptions:
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