Cyber Threat Actor: Groove

Grooveis a threat actor known by that alias, with open‑source reporting indicating a connection to Russia. The actor presents itself as a single individual rather than an organized gang, emphasizing a desire to demonstrate how easily media can be manipulated. Public statements attributed to Groove describe financial gain as a motive, exemplified by a ransom demand of $250,000 made against a Pennsylvania‑based healthcare provider. In addition to monetary extortion, the actor has threatened to disrupt victim operations by flooding offices and altering websites, showing a dual focus on profit and disruption. Targeting observed thus far has been limited to healthcare organizations located in the United States. The actor’s communications have consistently appeared in Russian, with machine‑translated messages posted on victim sites and on the actor’s own leak platform.

Open‑source sources do not specify the malware families, initial access vectors, or tooling that Groove employs in its operations. No publicly available technical reports link Groove to a particular ransomware variant or exploit kit. Consequently, the technical details of its attacks remain undescribed in the current record. The actor has used a leak site to name victims after attacks, although the site has subsequently disappeared, limiting further analysis.

Two reported incidents illustrate Groove’s activity: a ransomware attack on TriValley Primary Care, an eight‑location healthcare provider in Pennsylvania, where the actor demanded $250,000 and warned of office flooding and website modification if payment was not made. A pair of ransomware events against Episcopal Retirement Services exposed protected health information for potentially over four thousand individuals, after which Groove listed the organization on its leak site before the platform disappeared. In both cases the victim organizations acknowledged the ransomware nature of the incidents, though the exact intrusion method remained undetermined for the Episcopal Retirement Services case. Despite the threats, the healthcare providers reported that patient care continued during the incidents and that websites were restored after the resource limit errors were resolved. These examples show a pattern of targeting U.S. healthcare entities, seeking financial extortion while simultaneously threatening operational disruption and public embarrassment.