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In DOS systems, file directory entries include a Hidden file attribute which is manipulated using the attrib command. Using the command line command dir /ah displays the files with the Hidden attribute. In addition, there is a System file attribute that can be set on a file, which also causes the file to be hidden in directory listings.
The Vundo Trojan (commonly known as Vundo, Virtumonde or Virtumondo, and sometimes referred to as MS Juan) is either a Trojan horse or a computer worm that is known to cause popups and advertising for rogue antispyware programs, and sporadically other misbehavior including performance degradation and denial of service with some websites including Google and Facebook.
An altered/infected file's date and time in the DOS disk directory listing may have been updated to the current system date and time when the file was altered/infected. No text strings are visible within the viral code in infected EXE files, but the following text strings are encrypted within the initial copy of the ABC virus: ABC_FFEA Minsk 8. ...
Sality is a family of polymorphic file infectors, which target Windows executable files with the extensions .EXE or .SCR. [1] Sality utilizes polymorphic and entry-point obscuring (EPO) techniques to infect files using the following methods: not changing the entry point address of the host, and replacing the original host code at the entry point of the executable with a variable stub to ...
It involves numerous steps and requires good coordination between all of them. In addition, none of the files in the file system can be detected as malicious due to the use of encryption and fileless technologies. One other feature that makes detection harder is the mimicking of well-known software.
A drawing of the Microsoft Bear was used as the icon for the SETDEBUG.EXE and JDBGMGR.EXE system files. The odd icon gave credibility to the jdbgmgr.exe virus hoax, which claimed that the files were part of a computer virus. [11] See SULFNBK.EXE for a similar hoax.
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