Threat Description

Worm:​W32/Autorun

Details

Aliases:Win32.Worm.Autorun, Worm:​Inf/Hamweg.gen!A, Is/autorun, Worm:​inf/Autorun.gen!A, Virus:​W32/Autorun, Win32.worm.autorun.vx
Category:Malware
Type:Worm
Platform:W32

Summary



A program that secretly and maliciously integrates itself into program or data files. It spreads by integrating itself into more files each time the host program is run.



Removal


Automatic action

Once detected, the F-Secure security product will automatically disinfect the suspect file by either deleting it or renaming it.

More

You may wish to refer to the Support Community for further assistance. You also may also refer to General Removal Instructions for a general guide on alternative disinfection actions.



Technical Details



Variants in the Worm:W32/AutoRun family are worms that spread by copying themselves into the root directories of hard drives and other writable media such as USB memory sticks.

These worms create an autorun.inf file in the root directories of drives they want to infect.

Propagation

The autorun.inf includes the name and path of the actual worm executable.

When an infected media device (such as a CD, DVD or USB drive) is inserted into the computer, the autorun.inf and consequently the actual malicious program is automatically executed.

In addition to drives on the local computer, an Autorun worm can also spread to remote computers by infecting shared network drives.

Payload

Members of the AutoRun family also often contain other functionality in addition to just spreading.

This infection method is often used to propagate malicious payloads, such as a backdoor, password stealer, or some other kind of trojan.

Note

The following Generic Detections:

  • Worm:inf/Autorun.gen!A
  • Worm:Inf/Hamweg.gen!A

identify the autorun.inf files created by Autorun worms (and other families that use the same technique to propagate).






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