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Our most recent Cloud and Threat Report highlighted how threat actors abuse cloud services (with a special focus on cloud storage apps) to deliver malicious content (and yes, OneDrive leads the chart of the most exploited apps).
To confirm that this trend will likely continue in 2023, researchers at Trend Micro have discovered an active campaign, launched by a threat actor named Earth Bogle. They are using Middle Eastern geopolitical themes as a lure to target potential victims in the Middle East and Africa, and exploiting multiple public cloud storage services in a two-staged campaign aimed to distribute the remote access tool NjRAT (AKA Bladabindi).
During 2022, we have discovered 401 different apps exploited to deliver malware, and even this fragmentation trend will likely continue in 2023, given that for this specific campaign the threat actors have weaponized multiple cloud services. This not only includes the usual suspects, such as OneDrive and Discord exploited, and legitimate compromised websites, to distribute the stage two dropper, but also a couple of less known cloud storage services, files.fm and failiem.lv, used to deliver the stage one payload hidden inside a Microsoft Cabinet (CAB) archive file masquerading as a “sensitive” audio file (once again the attackers prey on the curiosity of their victims).
An additional interesting aspect of this campaign is that the links to the malicious cloud storage apps have been advertised through fake social media accounts claiming to belong to reputable organizations. This is an additional indirect contribution of weaponized cloud services for this campaign, as we have