DDoS attacks blamed on 70,000-strong Android botnet

Security researchers discover Mirai-style 'WireX' botnet


A vast botnet comprised of 70,000 Android devices has been blamed by security researchers for a string of DDoS attacks conducted over the past few weeks.

Experts from cyber security organisations including RiskIQ, Flashpoint, Akamai, Cloudflare, Team Cymru, Oracle Dyn, Google and others joined forces to combat the botnet, dubbed WireX.

Advertisement - Article continues below

Similar to the Mirai attacks of last year, WireX used a network of malware-infected devices to flood targets with legitimate-looking HTTP requests, knocking them offline through the sheer volume of traffic.

Rather than IoT and networking devices, however, this attack was carried out using compromised Android phones. Researchers estimated that the botnet contained at least 70,000 devices in over 100 countries, although senior Akamai engineer Chad Seaman told security expert Brian Krebs that the figure could be much higher.

While researchers estimate that WireX could have been active from 2 August, the bulk of attacks did not start until 15 August, catching the attention of the security community a couple of days later on 17 August.

"These discoveries were only possible due to open collaboration between DDoS targets, DDoS mitigation companies, and intelligence firms," said a joint blog post published by Akamai, Flashpoint, Cloudflare and RiskIQ. "Every player had a different piece of the puzzle; without contributions from everyone, this botnet would have remained a mystery."

Advertisement - Article continues below
Advertisement - Article continues below

The researchers warned that keeping a DDoS attack quiet is almost impossible, and said victims should reach out for help rather than trying to pretend that everything is running smoothly.

"The best thing that organisations can do when under a DDoS attack is to share detailed metrics related to the attack," the blog post noted. "With this information, those of us who are empowered to dismantle these schemes can learn much more about them than would otherwise be possible."

According to the post-mortem report issued by the security companies involved, the malware masqueraded as seemingly-legitimate apps, including storage managers, ringtone apps and video players.

Many were downloadable only from third-party app stores, but roughly 300 of the malicious apps were hosted on the Google Play Store. Google has now removed these apps from its store, and is in the process of remotely wiping them from users' devices.

Featured Resources

Navigating the new normal: A fast guide to remote working

A smooth transition will support operations for years to come

Download now

Putting a spotlight on cyber security

An examination of the current cyber security landscape

Download now

The economics of infrastructure scalability

Find the most cost-effective and least risky way to scale

Download now

IT operations overload hinders digital transformation

Clearing the path towards a modernised system of agreement

Download now



University of California gets fleeced by hackers for $1.14 million

30 Jun 2020
cyber security

Australia announces $1.35 billion investment in cyber security

30 Jun 2020
cloud security

CSA and ISSA form cyber security partnership

30 Jun 2020

Best antivirus for Windows 10

30 Jun 2020

Most Popular


How to find RAM speed, size and type

24 Jun 2020

Microsoft releases urgent patch for high-risk Windows 10 flaws

1 Jul 2020

The top 12 password-cracking techniques used by hackers

12 Jun 2020