JHC.1634 is a memory-resident DOS virus that infects the .exe, and .com files, as well as the Master Boot Record (MBR). The size of the infected files are increased by 1,634 bytes.
If the virus is executed from:
- A file, the free conventional memory is reduced by 3,674 bytes.
- The MBR, the total conventional memory is reduced by 4 KB.
JHC.1634 carries a destructive payload. If the virus is executed on June 17th, it attempts to overwrite with blank content any loaded and executed programs.
: Definitions dated prior to January 31, 2003 may detect this threat as Bloodhound.ResCOM or Bloodhound.ResEXE.
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