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August 24, 2016 | Dubai, United Arab Emirates | Press Releases

First Twitter-controlled Android botnet discovered by ESET

ESET researchers discovered an Android backdoor Trojan controlled by tweets. Detected by ESET as Android/Twitoor, it’s the first malicious app using Twitter instead of a traditional command-and-control (C&C) server.

After launch, the Trojan hides its presence on the system and checks the defined Twitter account in regular intervals for commands. Based on received commands, it can either download malicious apps or change
the C&C Twitter account to another one.

“Using Twitter to control a botnet is an innovative step for an Android platform,” says Lukáš Štefanko, the ESET malware researcher who discovered the malicious app.

According to Štefanko, communication channels based on social networks are hard to discover and impossible
to block entirely– while simultaneously being extremely easy for the crooks to re-direct communications to another account.

Twitter was first used to control Windows botnets in 2009. “As for the Android space, this means of hiding has remained untapped until now. In the future, however, we can expect that the bad guys will try to make use of Facebook statuses or deploy LinkedIn and other social networks”, envisages Štefanko.

Android/Twitoor has been active since July, 2016. It can’t be found on any official Android app store – according
to Štefanko- but probably spreads by SMS or via malicious URLs. It impersonates a porn player app or MMS application but without the functionality. Instead, it has been downloading several versions of mobile banking malware. However, the botnet operators can start distributing other malware at any time, including ransomware, according to Štefanko.

“Twitoor serves as another example of cyber criminals innovating their business. Internet users should keep on securing their activities with good security solutions for both computers and mobile devices,” concludes Lukáš Štefanko.

Read more in the blogpost on ESET’s blog, WeLiveSecurity.

About ESET

Since 1987, ESET® has been developing record award-winning security software that now helps over 100 million users to Enjoy Safer Technology. Its broad security product portfolio covers all popular platforms and provides businesses and consumers around the world with the perfect balance of performance and proactive protection. The company has a global sales network covering 200 countries, and regional offices in Bratislava, San Diego, Singapore and Buenos Aires. For more information visit www.eset.com or follow us on LinkedInFacebook and Twitter.

The Company has global headquarters in Bratislava (Slovakia), with regional distribution centers in San Diego (U.S.), Buenos Aires (Argentina), and Singapore. ESET has malware research centers in Bratislava, San Diego, Buenos Aires, Singapore, Prague, Košice (Slovakia), Krakow (Poland), Montreal (Canada), Moscow (Russia). ESET Middle East has its regional office in Dubai Internet City and manages an extensive partner network in 11 countries: United Arab Emirates, Saudi Arabia, Kuwait, Qatar, Oman, Bahrain, Yemen, Lebanon, Jordan Egypt and Libya. More information is available via www.eset.com/me