MSIL/Shaosmine.A worm is a standalone malware computer program that replicates itself in order to spread to other computers Computer worms are similar to viruses in that they replicate functional copies of themselves and can cause the same type of damage. In contrast to viruses, which require the spreading of an infected host file, worms are standalone software and do not require a host program or human help to propagate. To spread, worms either exploit a vulnerability on the target system or use some kind of social engineering to trick users into executing them. A worm enters a computer through a vulnerability in the system and takes advantage of file-transport or information-transport features on the system, allowing it to travel unaided.
This threat can collect information about your PC and send it to a malicious hacker. The malicious hacker can then tell the worm to do a number of things, including downloading and installing other malware onto your PC. It spreads through removable storage devices, such as floppy disks or USB flash drives, by pretending to be one of your own files that you have put on there.
MSIL/Shaosmine.A worm has the ability to infect removable media devices. Infection starts either with manual execution of the infected file or by invoking the corresponding .LNK files that could cause automatic execution of the worm. It allows backdoor access and control of user computer by a remote attacker.