Tag Archives: Android

If you have smart devices in the Android ecosystem, there’s a new threat to be aware of in the form of a malware strain called Teabot.  This bit of malicious code is a Remote Access Trojan or RAT for short. The group behind the code is making a big push to see it spread worldwide.

Researchers from Cleafy can confirm that the malware targets more than 400 different applications and the folk behind the code have begun to pivot away from their initial tactic of “smishing.”

Smishing, if you’re not familiar with the term, is a tactic used to compromise a mobile device via spam text messages that contain poisoned links.  If a recipient clicks on one of these links, they’re taken to a site controlled by the hackers and the malware is installed on the user’s computer in the background.

This bit of code emerged near the beginning of 2021. Back then, in its earliest incarnations it was known as Toddler/Anatsa.

In its primitive form, it was distributed exclusively via smishing and only had a list of sixty lures.  Granted they were big well-known lures like VLC Media player and DHL shipping but there were only sixty of them.

By July of last year, the owners of the malicious code had modified it to strike at dozens of banks based all over Europe. In the months that followed, at least 18 banks fell victim to Teabot attacks.

More recently, the malicious code has undergone additional changes. The malware has migrated from Europe spreading to Russia, the US, Hong Kong, and beyond.  In addition to that, it’s no longer targeting banks exclusively but cryptocurrency exchanges and digital insurance providers as well.  Even worse is that in at least one case Teabot has managed to infiltrate official Android repositories via dropper apps.

In terms of how big a problem this is, here is how it goes. Once Teabot is installed on a target system it can primarily log keystrokes and take screenshots. Then it can exfiltrate them to the malware’s controllers which means that in short order any site you log onto using your phone can quickly be compromised.

Stay vigilant out there.  It’s still early in the year and Teabot will certainly not be the last threat we face.

There are two new forms of malware spreading rapidly among people with Android devices according to researchers at ThreatFabric. This latest campaign involves the FluBot malware (also known as Cabassous) and the Android banking trojan called Medusa.  What’s disturbing about this most recent spate of attacks is that both forms of malware share the same basic infection tactics and delivery infrastructure.

FluBot is one of the most notorious strains of Android malware and can steal passwords, banking details, and other sensitive information from infected devices. It also gains access to the user’s list of contacts and uses SMS messages to spread to other devices.

FluBot’s success has encouraged imitators. Although Medusa was not created by the same group that authored FluBot, Medusa’s authors are following in FluBot’s footsteps.

In the case of Medusa it began life as a keylogger. It has been upgraded and can now take screenshots and collect data about how the device is used.  Medusa’s authors have even gone so far as to deliver their malicious payload by using poisoned apps bearing the exact same names that FluBot’s controllers use.

The researchers at ThreatFabric had this to say about the matter:

“Despite the fact that Medusa is not extremely widespread at the moment, we do see an increase in volume of campaigns and a sufficiently greater number of different campaigns.

Powered with multiple remote access features, Medusa poses a critical threat to financial organisations in targeted regions.”

The single best thing users can do to minimize the risk of infection by either of these forms of malware is to install apps from the Google Play store or other authorized and trusted vendors only.  Never install an app via a direct link or from some other website that offers it.  It just isn’t worth the risk.