The list of file attachments banned by Google includes the following:
.JS, .ADE, .ADP, .BAT, .CHM, .CMD, .COM, .CPL, .EXE, .HTA, .INS, .ISP, .JAR, .JSE, .LIB, .LNK, .MDE, .MSC, .MSP, .MST, .PIF, .SCR, .SCT, .SHB, .SYS, .VB, .VBE, .VBS, .VXD, .WSC, .WSF, .WSH.
.JS Files in Malware Distribution
How Does Obfuscation Work?
Obfuscators have been used in malware distribution for quite some time Their main purpose is to conceal the binary code of programs so that cybercriminals may be able to prevent the competition from stealing it and copying it. Obfuscators conceal the contents of the malicious files so that they can evade anti-malware software.
Besides .JS, other files can be deployed in a similar way such as .VBS, .VBE, .WSH, and .WSF. Luckily, Google blocks all of them.
Users are strongly advised not to open a file type they don’t know or don’t recognize. Make sure to always check the sender. If it seems dubious, it most certainly is!