If you are sent the Facebook chat message below: "LOL", with a Zip file attached, with the name "IMG_xxxxx.zip" (x represents a number), please not open the file, although the message seems as if it came from one of your Facebook friends. The file is a not an image or a document and was not sent by your Facebook friends. The file is actually a malware that will infect your computer and compromise your Facebook account, if you open it.
Once your Facebook account is hijacked by this malware, it will send itself to all of your Facebook friends.
This is How The Malicious Facebook Virus Chat Messages Look

lol
IMG_00417.zip
Lol
IMG_00103.zip
The name of the malicious zip file will change. If you look at the file names above, you will notice that the numbers have changed. If you have received any files with the naming format "IMG_xxxxx.zip", where “x” represents a number, in your Facebook chat message window, please do not open it.
Opening the "IMG_xxxxx.zip" will not infect your computer; it is the malicious file "IMG_xxxxx.jar" that it contains that will infect your computer if you open it.
Currently, the malware attached to the message only affects computers running the Windows operating system. But, that does mean that you should open it if you are using another operating system such as Google Android, Apple OS, Linux or others.
Now, if you have already opened the malicious file, please do a full scan of your computer with the antivirus software installed on it and do not open files ending with “.zip” or “.rar”, unless you are expecting these files from someone.
Also, do the following:
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