To infect a computer with malicious software, hackers must do one of the following:
- Persuade the user to run an infected file.
- Attempt to get access to the victim’s computer by exploiting a flaw in the operating system or any application software installed on the machine.
Simultaneously, more experienced fraudsters would try to make their malware elude any antivirus software installed on the victim’s PC.
Antivirus software combat techniques
Cybercriminals have devised a variety of strategies to try to counteract the actions of antivirus software in order to maximize their chances of completing their goals, including:
- Encryption and code packing
Most worms and Trojan viruses are compressed and encrypted. Hackers also create custom tools for packaging and encrypting data. Every Internet file that was analysed with CryptExe, Exeref, PolyCrypt, and other tools was discovered to be malicious.
The antivirus application needs either implement new unpacking and decoding procedures or new signatures for each sample of a dangerous programme in order to identify packed and encrypted worms and Trojans.
- Changes in the code
Cybercriminals try to hide their dangerous software by combining a Trojan virus’s code with’spam’ instructions – so that the code takes on a new appearance but the Trojan retains its original purpose. On all, or almost all, occasions that the Trojan is downloaded from an infected website, code modification occurs in real time. This method was utilized by the Warezov mail worm, which produced several significant outbreaks.
- Antivirus software and database upgrades are being blocked.
Many Trojan infections and network worms will aggressively explore the list of active apps on the target PC for antivirus products. After that, the virus will attempt to:
- Turn off your antivirus programme.
- Antivirus databases are harmed.
- Prevent the antivirus software’s update operations from working properly.
To combat the infection, the antivirus application must protect itself by maintaining database integrity and masking its operations from the Trojans.
- Using a website’s code to hide it
Antivirus firms will soon discover the addresses of websites containing Trojan virus files, and their virus experts will examine the content of these sites before adding the new malware to their databases. However, in order to avoid antivirus screening, a webpage may be updated such that when an antivirus business sends a request, a non-Trojan file is downloaded instead of a Trojan.
- Attacks of ‘Quantity’
A Quantity Attack occurs when a huge number of fresh Trojan variants are spread across the Internet in a short period of time. As a result, antivirus businesses are inundated with new samples to examine. The cybercriminal expects that by taking the time to analyze each sample, their malicious code would have a better chance of infiltrating consumers’ machines.
” This blog offers generic information. By no means, it is professional advice. The information aforementioned is believed to be factually correct. The information provided is solely based on the author’s judgment and is subject to change. This is not endorsed by any 3rd parties or other brands.”
Article Credits –
kaspersky.com
#Hijacker #HackersAttack #AntivirusBypass #Encryption
