Bitdefender

Bitdefender is a multinational cybersecurity technology company dual-headquartered in Bucharest, Romania and San Antonio, Texas, with offices in the United States, Europe, Australia and the Middle East.[2] In the Asia-Pacific (APAC) region, offices are located in Australia (Melbourne), as well as in Southeast Asia, including Singapore and Indonesia (Jakarta).

The company was founded in 2001 by current CEO and main shareholder, Florin Talpeș. Bitdefender develops and delivers cybersecurity products and services, including antivirus software, endpoint security, managed detection and response, identity protection and online privacy for consumers and enterprises.

Bitdefender products are distributed both online and through partners in over 150 countries, and the US market is estimated to generate more than 40% of its revenue. As of 2025, the company employed more than 1,800 people worldwide.[2]

History

Bitdefender software was originally developed by SOFTWIN, a company founded in 1990 in post-communist Romania. It was originally sold as AVX (Antivirus Expert) from 1996 until 2001, when the Bitdefender subsidiary was created and AVX was rebranded under the Bitdefender name.

Fighting cybercrime

In 2014, Bitdefender built an AI model that successfully blocked the WannaCry ransomware attack in 2017.[23]

Since 2016, Bitdefender has advised Europol’s European Cybercrime Centre (EC3) in supporting investigations into online criminal activity.[24] Bitdefender joined the No More Ransom initiative in 2016, releasing free decryption tools for victims of ransom attacks to decrypt their devices without having to pay to do so.[25][26] This included releasing a free universal decryption kit for users affected by the GandCrab ransomware attack in 2018.[27]

In 2016, Bitdefender advised the FBI, the DEA, and the Dutch National Police (with the support of Europol) during Operation Bayonet, culminating in the shutdown of the AlphaBay and Hansa black markets in 2017.[28]

In 2018, Bitdefender joined the Cybersecurity Tech Accord,[29] and in 2019, provided operational support to the European Cybercrime Centre, helping shut down the Sipulimarket and Silkktie darknet markets.[30]

Bitdefender's 2020 research into the Interplanetary Storm botnet proxy network was provided to law enforcement ahead of the FBI dismantling the network in November 2023.[31]

In September 2023, Bitdefender provided support to Finnish authorities contributing to the seizure of the PIILOPUOTI dark web marketplace.[32] In May 2024, Bitdefender was a supporting partner for Europol's Operation Endgame, which Europol called the largest operation ever against bots, including IcedID, SystemBC, Pikabot, Smokeloader and Bumblebee.[33] It led to the takedown of over 100 servers, and four arrests worldwide.[34][35] The next phase of Operation Endgame, which took place between November 10 and 13, 2025, led to 1,025 servers being taken down, disrupting credential theft, crypto wallet compromise, and other online attacks affecting hundreds of thousands of victims.[36]

Researchers for Bitdefender provided Finnish customs with information to help shut down the Sipulitie Tor marketplace in October 2024.[37]

Controversies and incidents

Trojan.FakeAlert.5

On March 20, 2010, computers running Bitdefender under 64-bit versions of Windows were affected by a malfunctioning update that classified every executable program as well as DLL files as infected. These files were all marked as 'Trojan.FakeAlert.5' and were moved into quarantine. This action led to software and systems malfunctions that affected users globally.[51] Bitdefender representatives announced the removal of the faulty update and a workaround for the users affected,[52] except for those using the 2008 version.[53]

DarkSide ransomware

In 2020, hacker group DarkSide switched its main encryption ransomware product over to an "affiliate" model wherein other attackers could download and use its software in exchange for a portion of the profits. However, it introduced a bug in the process where affiliate hackers would all use the same private RSA key - meaning that a decryption package for a single target who paid the ransom would work on any target that had the ransomware installed. Security researchers noticed and were quietly already helping victims of the software, but with no public notice, making it so that the attackers would only see an inexplicable decrease in ransom payments that could be written off as chance.

Months later, Bitdefender publicly released a decryptor of its own development and issued a blog post describing the flaw. Security researchers studying the Colonial Pipeline cyberattack in May 2021 criticized Bitdefender for using the bug as a brief burst of publicity, though they acknowledged that DarkSide would’ve eventually noticed and fixed the issue.[54] Bitdefender defended its actions, saying it only wished to notify as many organizations as possible,[55] triggering a discussion among cybersecurity professionals about the pros and cons of publicly disclosing such vulnerabilities in malware:[56] while the provision of free decryption tools may[57] provide relief for some ransomware victims (who might otherwise not receive free and timely help from experts), their usefulness is short-lived as hackers use these same tools to improve and develop new ransomware software.[54]

Since the creation of its free Darkside Ransomware Decryption Tool, Bitdefender has continued to provide free decryption and recovery tools to the general public on 'multiple occasions', the latest being February 2023.

type	Private
industry	Computer software
products	Cybersecurity software
services	Computer security
foundation	November 6, 2001
founder	Florin Talpeș
location	Bucharest, Romania and San Antonio, Texas
area served	Worldwide
key people	Florin Talpeș (CEO)
revenue	€330 million (2022)‡R1R‡
num employees	1,800+ (2025)

History

Fighting cybercrime

Products and services

Consumer

Enterprise

Artificial intelligence

Controversies and incidents

Trojan.FakeAlert.5

DarkSide ransomware

Awards

See also

External links

References