What is Malware in Cyber Security?, Computer
It is Malicious or bad code, which is design to do wrong activity
Design to damage a system, steal information
Examples of Malware
- It can add, modify, delete the data.
- It collects sensitive data
- It can stop running services
- It can shut down the system
How to prevent Malware?
Mitigate:
- Install AV with latest up-to-date signatures (hash values)
- Use Ad blockers
- Educate the users
Types of Malware
What is Virus?
- It effects clean files
- Usually .exe files
- Requires user action to spread.
What is Worm?
- Effects other systems
- Multiple copies
- Shared folders, open ports, networks (Printers)
- User action not needed to spread
What is Trojan?
It looks like legitimate software but internally collects all information.
How Virus is made?
Attackers develop the code and injects in the machines.
What is Spyware?
It can be by software you installed captures
Key strokes
And provide information to attackers
What is Ransomware?
Encryption of files.
In-return attackers ask money. Usually in Crypto Currency.
How you can prevent your organization from ransomware attacks?
By Network Segregation:
It involves separation of critical networks from
Internet
Less sensitive internal networks
By Network Segmentation:
It involves splitting, division of large networks into smaller ones
What is Adware?
website open, Popup ads,
Annoying user experience
By Ad Blockers you can control
What is Botnets?
Perform automated tasks
Network of infected computers work under the control of hackers.
What is RAT?
RAT: Remote access trojans
Attackers gains un authorized access to remote machines
Trick user to perform certain action.
Email a worm can automatically send copy of itself to all the users in your address book
What are Drive by download?
Unintentionally they download of malicious code
Example: Simply visiting a website can activate the download
By outdated apps, browsers, OS
Mitigation:
- Keep software up to date
- Install web filtering software
- Adds-on on browsers
- Not to visit untrusted websites
What are Fileless Malware?
It Hides in Memory un-detected
Mitigation:
- Use EDR tools to monitor and detect suspicious activities
- Disable shell scripting, power-shell command line where ever not required
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