Zyxel Flaw Powers New Mirai IoT Botnet Strain

March 20, 2020

In February, hardware maker Zyxel fixed a zero-day vulnerability in its routers and VPN firewall products after KrebsOnSecurity told the company the flaw was being abused by attackers to break into devices. This week, security researchers said they spotted that same vulnerability being exploited by a new variant of Mirai, a malware strain that targets vulnerable Internet of Things (IoT) devices for use in large-scale attacks and as proxies for other cybercrime activity.

Mirai Botnet Authors Avoid Jail Time

September 19, 2018

Citing “extraordinary cooperation” with the government, a court in Alaska on Tuesday sentenced three men to probation, community service and fines for their admitted roles in authoring and using “Mirai,” a potent malware strain used in countless attacks designed to knock Web sites offline — including an enormously powerful attack in 2016 that sidelined this Web site for nearly four days.

Mirai IoT Botnet Co-Authors Plead Guilty

December 13, 2017

The U.S. Justice Department on Tuesday unsealed the guilty pleas of two men first identified in January 2017 by KrebsOnSecurity as the likely co-authors of Mirai, a malware strain that remotely enslaves so-called “Internet of Things” devices such as security cameras, routers, and digital video recorders for use in large scale attacks designed to knock Web sites and entire networks offline (including multiple major attacks against this site).

Suspended Sentence for Mirai Botmaster Daniel Kaye

July 28, 2017

Last month, KrebsOnSecurity identified U.K. citizen Daniel Kaye as the likely real-life identity behind a hacker responsible for clumsily wielding a powerful botnet built on Mirai, a malware strain that enslaves poorly secured Internet of Things (IoT) devices for use in large-scale online attacks. Today, a German court issued a suspended sentence for Kaye, who now faces related cybercrime charges in the United Kingdom.

Who is the GovRAT Author and Mirai Botmaster ‘Bestbuy’?

July 5, 2017

In February 2017, authorities in the United Kingdom arrested a 29-year-old U.K. man on suspicion of knocking more than 900,000 Germans offline in an attack tied to Mirai, a malware strain that enslaves Internet of Things (IoT) devices like security cameras and Internet routers for use in large-scale cyberattacks. Investigators haven’t yet released the man’s name, but news reports suggest he may be better known by the hacker handle “Bestbuy.” This post will follow a trail of clues back to one likely real-life identity of Bestbuy.

How Google Took on Mirai, KrebsOnSecurity

February 3, 2017

The third week of September 2016 was a dark and stormy one for KrebsOnSecurity. Wave after wave of huge denial-of-service attacks flooded this site, forcing me to pull the plug on it until I could secure protection from further assault. The site resurfaced three days later under the aegis of Google’s Project Shield, an initiative which seeks to protect journalists and news sites from being censored by these crippling digital sieges.

Damian Menscher, a Google security engineer with whom I worked very closely on the migration to Project Shield, spoke publicly for the first time this week about the unique challenges involved in protecting a small site like this one from very large, sustained and constantly morphing attacks.

‘Who Is Anna-Senpai Mirai?’ Story Glossary

January 18, 2017

This document is to serve as a glossary for the story published January 18, 2017, Who Is Anna-Senpai, the Mirai Worm Author? Ammar Zuberi: Founder of onetime cloud hosting firm FastReturn. Later went to work as a programmer for ProTraf Solutions. See… Read More »

Who is Anna-Senpai, the Mirai Worm Author?

January 18, 2017

On September 22, 2016, this site was forced offline for nearly four days after it was hit with “Mirai,” a malware strain that enslaves poorly secured Internet of Things (IoT) devices like wireless routers and security cameras into a botnet for use in large cyberattacks. Roughly a week after that assault, the individual(s) who launched that attack — using the name “Anna Senpai” — released the source code for Mirai, spawning dozens of copycat attack armies online.

After months of digging, KrebsOnSecurity is now confident to have uncovered Anna Senpai’s real-life identity, and the identity of at least one co-conspirator who helped to write and modify the malware.

New Mirai Worm Knocks 900K Germans Offline

November 30, 2016

More than 900,000 customers of German ISP Deutsche Telekom (DT) were knocked offline this week after their Internet routers got infected by a new variant of a computer worm known as Mirai. The malware wriggled inside the routers via a newly discovered vulnerability in a feature that allows ISPs to remotely upgrade the firmware on the devices. But the new Mirai malware turns that feature off once it infests a device, complicating DT’s cleanup and restoration efforts.