What is malware?
Malware, or malicious software, is any program or file that is harmful to a computer user. Malware includes computer viruses, worms, Trojan horses and spyware. These malicious programs can perform a variety of functions, including stealing, encrypting or deleting sensitive data, altering or hijacking core computing functions and monitoring users' computer activity without their permission.
What is Wannacry malware?
• Wannacry is a malware which is spreading across the globe since May 12, 2017 and has hit government & private companies and universities in nearly 100 countries.
• WannaCry (also known as WCry or WanaCryptor) malware is a self-propagating (worm-like) ransomware that spreads through internal networks and over the public internet by exploiting a vulnerability in Microsoft’s Server Message Block (SMB) protocol, MS17-010.
What is a Ransom-ware?
• Ransom-ware is a malware that encrypts the files on an infected system and then demands a ransom to decrypt them, with escalation in the demand over time.
• The ransom demand is in Bitcoins.
• It often reaches victims as mail attachment. Once opened, it spreads to other computers in the network exploiting the Windows vulnerability. It spreads using a flaw in older Microsoft windows system.
Other terms related to it
• Virus: Viruses attach themselves to clean files and infect other clean files. They can spread uncontrollably, damaging a system’s core functionality and deleting or corrupting files.
• Trojans: This kind of malware disguises itself as legitimate software, or is included in legitimate software that has been tampered with. It tends to act discretely and create backdoors in your security to let other malware in.
• Spyware: It hides in the background and takes notes on what you do online, including your passwords, credit card numbers, surfing habits and more.
• Worms: Worms infect entire networks of devices, either local or across the internet, by using network interfaces. It uses each consecutive infected machine to infect more.
• Ransomware: Also called scareware, this kind of malware can lock down computer and threaten to erase everything — unless a ransom is paid to its owner.
• Adware: Though not always malicious in nature, particularly aggressive advertising software can undermine security just to serve ads — which can give a lot of other malware a way in.
• Botnets: Botnets are networks of infected computers that are made to work together under the control of an attacker.
Government of India has launched Cyber Swachhta Kendra–Botnet Cleaning and Malware Analysis Centre for analysis of malware and botnets that affect networks and systems.
The Centre will operate in close co-ordination and collaboration with Internet Service Providers (ISP) and Anti-Virus companies. Whenever an infection is detected, the Centre will send alerts on the infected IP addresses to the Internet Service Providers, who in turn will inform the end-user about the malware and botnet infections on their system. The Centre will also work in close collaboration with the Banks to detect malware infections in their banking network and enable remedial actions. The launch of the Centre will help the Internet service providers and the banks to keep their networks clean and prevent cases of cyber fraud and theft.