Threat actors are distributing legitimate Remote Monitoring and Management (RMM) tools such as ScreenConnect, FleetDeck, Datto, SimpleHelp, JumpCloud, and N-able through phishing campaigns. These campaigns use social engineering tactics with fake Adobe Acrobat updates, DocuSign viewers, and document access prompts to trick victims into installing remote access tools disguised as business documents. Delivery methods include LNK files, BAT scripts, VBS files, and PDFs. The RMM tools contain embedded configuration data linking back to attacker infrastructure, enabling remote access while evading detection.
Between June 2024 and April 2025, a sustained credential-harvesting campaign targeting UKR.NET users was identified, attributed to the Russian state-sponsored threat group BlueDelta. The group deployed multiple credential-harvesting pages themed as UKR.NET login portals, leveraging free web services and proxy tunneling platforms to collect user credentials. BlueDelta distributed PDF lures with embedded links to evade detection. The campaign demonstrates the group's adaptability and persistent focus on Ukrainian user credentials for intelligence purposes. Infrastructure changes, including the transition to ngrok and Serveo, reflect responses to takedown efforts. The activity highlights the GRU's continued interest in compromising Ukrainian credentials amid ongoing conflict.
