1. Mydoom. Considered by many to be the most dangerous computer virus in history, the Mydoom virus cost around $38 billion worth of damage in 2004. If you think in terms of today's economy, given inflation, that would amount to about $52 billion.
Also known as LoveLetter, ILOVEYOU was considered to be the most dangerous virus at the time of its release. The ILOVEYOU virus was created by two Philippine programmers, Reonel Ramones and Onel de Guzman, to steal passwords they could use to log in to online services they wanted to use for free.
Brain, the first PC virus, began infecting 5.2" floppy disks in 1986. As Securelist reports, it was the work of two brothers, Basit and Amjad Farooq Alvi, who ran a computer store in Pakistan.
The Most Dangerous Computer viruses in 2023 are Clop Ransomware, Hidden Ransomware, Zeus Gameover, RaaS, and New malware attacks. When executed, a computer virus is a sort of computer program that repeats itself by altering other computer programs and inserting its own code.
Trojan viruses are bad because they trick users into downloading malware that harms devices in various ways. As an example, remote access Trojans (RATs) give hackers remote access to infected computers, which can result in spying, data theft, and identity theft.
Unlike viruses, Trojan Horses do not replicate themselves, but they can be just as destructive. Trojans also open a backdoor entry to your computer, giving command to malicious actor or allowing malicious users/programs access to your system. This leads to confidential and personal information being stolen.
A Trojan horse (or Trojan) is one of the most common and dangerous types of threats that can infect your computer or mobile device.
What is Zeus Virus? Zeus Virus (or Zeus Trojan malware) is a form of malicious software that targets Microsoft Windows and is often used to steal financial data.
Mydoom. Mydoom is arguably the worst malware in history, causing more than $38 billion worth of damages in 2004.
560,000 new pieces of malware are detected each day. There are currently more than 1 billion malware programs out there. 4 companies are attacked by ransomware every minute.
But big it became. In September 1988, the Alvi brothers were featured in a Time magazine cover story and tech historians still regard their virus as one of the most sophisticated of its time. No history of computer viruses is complete without mention of the Pakistani Brain.
The first computer virus, Brain, was discovered in 1986 and was created by two brothers, Basit and Amjad Farooq Alvi, who ran a computer store in Lahore, Pakistan. Brain was a boot sector virus, which means it infected the boot sector of floppy disks.
Brain was written by Amjad Farooq Alvi and Basit Farooq Alvi, who at the time lived in Chah Miran, near Lahore Railway Station, in Lahore, Pakistan.
ILOVEYOU, sometimes referred to as Love Bug or Love Letter for you, was a computer worm that infected over ten million Windows personal computers on and after 5 May 2000. It started spreading as an email message with the subject line "ILOVEYOU" and the attachment "LOVE-LETTER-FOR-YOU. TXT.
But while the thesis would cost de Guzman his degree, his teacher's argument about illegality would be proven incorrect. Onel de Guzman, seen here in May 2000, was quickly accused of being the author of the ILOVEYOU virus.
Although the ILOVEYOU virus is no longer active, it serves as an example of how quickly malicious code can spread across the internet and cause widespread damage. Additionally, it highlights the importance of being aware of cyber threats and taking steps to protect yourself from them.
The actual author of the worm is unknown. The worm appeared to be a poorly sent e-mail, and most people who originally were e-mailed the worm ignored it, thinking it was spam. However, it eventually spread to infect at least 500 thousand computers across the globe.
ILOVEYOU could -- and did -- destroy all kinds of files including photographs, audio files and documents. Affected users who didn't have backup copies lost them permanently. In March 1999, similar to ILOVEYOU, the Melissa virus also replicated itself by using Outlook address books.
MyDoom-A is programmed to stop spreading today, marking the end of arguably the worst email-borne viral epidemic to date. MessageLabs, the email filtering firm, blocked the virus 43,979,281 times in the two weeks since its first appearance in late January.
Like many forms of malware the Zbot was initially used to steal banking information. However, in 2011, the source code was released to the public, allowing multiple new variants to be created. The original code has apparently been retired, but new generations of Zeus trojans are still active today.
Trojan viruses are a type of malware that invade your computer disguised as real, operational programs. Once a trojan is inside your system, it can perform destructive actions before you even know it's there.
A Trojan Horse Virus is a type of malware that downloads onto a computer disguised as a legitimate program. The delivery method typically sees an attacker use social engineering to hide malicious code within legitimate software to try and gain users' system access with their software.
Mydoom (A.K.A. Novarg) was the worst computer virus outbreak in history. It caused an estimated damage of $38 billion in 2004, but the inflation-adjusted cost is actually $52.2 billion. Technically, it is a worm, which is spread by mass emailing.
A logic bomb is a malicious program that is triggered when a logical condition is met, such as after a number of transactions have been processed, or on a specific date (also called a time bomb). Malware such as worms often contain logic bombs, behaving in one manner, then changing tactics on a specific date and time.