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The first computer virus in the Philippines is known as the “ILOVEYOU” virus also referred to as the “Love Bug” or “Loveletter” virus. It emerged on May 4, 2000, and quickly spread globally, affecting millions of computer systems worldwide.

What is the ILOVEYOU Virus?

The Love Bug, ILOVEYOU, is often mistakenly labeled a computer virus. However, it is crucial to clarify that it is, in fact, a worm. The key distinction lies in the method of propagation. While a virus relies on a “host file” to trigger the infection and subsequent activation on each infected computer, a worm diverges from this pattern. 

Unlike viruses, worms do not require a host file for activation; they can self-replicate and spread independently across multiple systems. Therefore, once a worm infiltrates a single computer, it can propagate itself to other vulnerable devices without triggering additional host files on each subsequent infection or human intervention.

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Origin and Spread of the ILOVEYOU Virus

A Filipino computer programmer named Onel de Guzman designed and unleashed the “ILOVEYOU” virus. He incorporated the virus into the source code he submitted for his final thesis while studying as an undergraduate computer student at the AMA Computer College. But the original goal of ILOVEYOU wasn’t to cause unwarranted destruction of the victim’s computer. In his thesis draft, Onel de Guzman outlined his program’s objective of acquiring Windows passwords and extracting internet accounts stored on the victim’s computer. The “ILOVEYOU” virus, which he developed, was designed to fulfill these goals.

During that period, internet access in the Philippines involved paying for dial-up connectivity based on usage duration, which differed significantly from the flat-rate charges prevalent in many European and American regions. De Guzman conceived the notion that individuals in developing nations could leverage users’ connections in wealthier countries, enabling them to enjoy extended internet usage without incurring any expenses. The worm adopted the very principles outlined in de Guzman’s undergraduate thesis.

The spread of the virus

On May 4, 2000, the infection commenced when a spammed email message reached the Philippines, enticing recipients with the subject line “ILOVEYOU.” The email enticed the recipients to open the attached document, purportedly a love letter from the sender. 

Beyond being one of the initial significant instances of a computer virus outbreak, ILOVEYOU stood out as a groundbreaking demonstration of the vast potential of spam, surpassing its reputation as a mere nuisance that consumes time.

Upon opening the email, the virus initiated its propagation by autonomously distributing replicas of itself to all individuals listed in the recipient’s address book. Unaware of its malicious nature, the recipients, believing it to be a sincere expression of affection or an amusing jest, succumbed to their curiosity and unwittingly contributed to its further dissemination.

What is the First Computer Virus in the Philippines?

The first computer virus in the Philippines was called the “ILOVEYOU” virus, also known as the “Love Bug” or “Loveletter” virus. It first appeared on May 4, 2000, and quickly spread globally, affecting millions of computer systems. This computer infection started on May 4, 2000, when a spam email with the subject line “ILOVEYOU” made its way to the Philippines. The sender claimed to be sending a love letter, and the email encouraged recipients to open the attached document.

When the false love letter is opened, a worm tricks Windows users into believing it is a regular text file, executing a visual script. The worm then sent the deceptive message to all contacts in the recipient’s Outlook address book. The virus then overwrote and erased several files, causing the Windows Registry to execute the malware when the system booted.

Is the First Computer Virus in the Philippines the First in the World?

No, the first computer virus that happened in the Philippines was the “ILOVEYOU” virus, while the first known computer virus in the world, was the “Creeper” Virus. The first computer virus in the whole world is thought to have been created in 1971 by Bob Thomas of BBN with his Creeper program.

First implemented on ARPANET networks in 1971, creators designed it as a security test to determine whether creating a self-replicating program was possible. On impacted computers, the message “I’m the creeper, catch me if you can!” appeared. The makers of the virus did not release it with the intention of causing harm, even though it had little effect on the computers it infected.

In contrast to the ILOVEYOU Virus, the system successfully eliminated it upon detection, obstructing its propagation to additional computers. Given that Creeper spread from computer to computer rather than multiplying, some people doubt its “viral” nature.

How does the ILOVEYOU Virus Work?

Concealed within the ILOVEYOU virus was an attachment posing as a seemingly harmlessly text file, cleverly disguised as a VBScript program — LOVE-LETTER-FOR-YOU.txt.vbs attachment. The hidden visibility of the .vbs extension on their computers tricked Windows users into thinking it was a regular text file. Opening the email attachment executes the basic visual script. Once executed, the worm locates the recipient’s Outlook address book and distributes the deceptive message to every contact. Subsequently, the virus systematically overwrites and obliterates files of diverse formats. 

To accomplish this task, the worm manipulates the Windows Registry, modifying its settings to initiate the execution of the malware upon system startup. It then replaces the contents of various computer files, encompassing JPEG images and Word documents, with replicated versions of the worm. Every affected user who didn’t have a backup of their files lost all their data entirely.

Impact and Damage of the ILOVEYOU Virus

Soon as the love bug hit the internet, its effect was overreaching and devastating. Within hours of its first sighting in the Philippines, the worm had tunneled its way across Asia, Europe, and North America. Its propagation outpaced the Melissa virus — which struck a year earlier, affecting about 1 million computers — by approximately 15 times.

Shortly after its emergence on May 4, the ILOVEYOU virus wreaked havoc, forcing the United Kingdom’s House of Commons, the Ford Motor Company, and even Microsoft to suspend their overloaded email servers. During that period, Windows held a dominant market share, controlling over 95% of the personal computer landscape. And bundled with Microsoft Office was Outlook, an integral component for conducting business on computers, almost indispensable. Despite receiving an advance warning, the United States experienced a rapid and widespread spread of the virus, as many individuals couldn’t resist the temptation to open the “love letter.”

Even the Pentagon wasn’t spared. The bug was able to worm its way into the United States Army Forces Command (FORSCOM) mailing list, which boasted a substantial subscriber base of 50,000 individuals. Subsequently, nearly every significant military base across the country experienced the debilitating impact of the virus, with only a few exceptions where Outlook was not in use.

Within approximately ten days, the ILOVEYOU virus swiftly infiltrated an estimated user base of 45 million individuals, leaving a devastating impact in its wake. The repercussions of this widespread infection were staggering, resulting in an estimated financial toll amounting to around $10 billion in damages.

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Response and Aftermath

Unsurprisingly, the “ILOVEYOU” virus received substantial media attention and prompted the global cybersecurity community to take notice. Its rapid spread and devastating impact highlighted the vulnerability of computer systems to such attacks. Authorities did not press charges against Onel de Guzman, despite suspicions of creating the virus, as there were no relevant laws in place at that time. Nevertheless, the incident raised awareness about the need for legislation to address cybercrime in the Philippines and other countries.


What is the first computer virus?

The first computer virus is often credited to the “Creeper” virus created by Bob Thomas in 1971. Although the term “virus” was not used at the time, Creeper was a self-replicating program that targeted the ARPANET, a precursor to the internet.

What is the first computer virus in the photo?

In February 2008, the cybersecurity landscape encountered a notable trojan known as Mocmex. This pioneering incident underscored the expanding threat landscape, revealing that even seemingly harmless devices could serve as vectors for malware infiltration.

What is the most famous computer virus?

Mydoom. Considered by many as the most severe malware ever encountered, Mydoom stands out for its devastating impact. In 2004 alone, this notorious malware inflicted over $38 billion in damages.


ILOVEYOU is an early real-world case of employing social engineering tactics to carry out cybercrimes. Social engineering has emerged as a prevalent attack method over the past two decades since its inception and release, especially with the surge of incidents following the COVID-19 pandemic. 

Additionally, ILOVEYOU played a significant role in highlighting the perilous consequences of spam email. It marked one of the initial instances where serious malware incidents exposed the potential dangers of such deceptive messages.

On a positive note, the advent of the virus sparked a profound transformation in the cybersecurity landscape, drawing attention to the exploitation of human emotions and vulnerabilities by malicious actors. It has served as a wake-up call for companies and security professionals, compelling them to reevaluate the significance of enterprise security and prioritize user security awareness and education, particularly concerning social engineering, spam, and phishing threats.

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