The German Regional Police (Landeskriminalamt Nordrhein-Westfalen) and the Ukrainian National Police (Націона́льна полі́ція Украї́ни), with support from Europol, the Dutch Police (Politie) and the United States Federal Bureau of Investigations, targeted suspected core members of the criminal group responsible for carrying out large-scale cyberattacks with the DoppelPaymer ransomware.
This ransomware appeared in 2019, when cybercriminals started using it to launch attacks against organisations and critical infrastructure and industries. Based on the BitPaymer ransomware and part of the Dridex malware family, DoppelPaymer used a unique tool capable of compromising defence mechanisms by terminating the security-related process of the attacked systems. The DoppelPaymer attacks were enabled by the prolific EMOTET malware.
During the simultaneous actions, German officers raided the house of a German national, who is believed to have played a major role in the DoppelPaymer ransomware group. Investigators are currently analysing the seized equipment to determine the suspect’s exact role in the structure of the ransomware group. At the same time, and despite the current extremely difficult security situation that Ukraine is currently facing due to the invasion by Russia, Ukrainian police officers interrogated a Ukrainian national who is also believed to be a member of the core DoppelPaymer group. The Ukrainian officers searched two locations, one in Kiev and one in Kharkiv. During the searches, they seized electronic equipment, which is currently under forensic examination.
Europol on-site to speed up forensic analysis of seized data
On the action days, Europol deployed three experts to Germany to cross-check operational information against Europol’s databases and to provide further operational analysis, crypto tracing and forensic support. The analysis of this data and other related cases is expected to trigger further investigative activities. Europol also set up a Virtual Command Post to connect the investigators and experts from Europol, Germany, Ukraine, the Netherlands and the United States in real time and to coordinate activities during the house searches. Europol’s Joint Cybercrime Action Taskforce (J-CAT) also supported the operation. This standing operational team consists of cybercrime liaison officers from different countries who work on high-profile cybercrime investigations.
From the beginning of the investigation, Europol facilitated the exchange of information, coordinated the international law enforcement cooperation and supported the operational activities. Europol also provided analytical support by linking available data to various criminal cases within and outside the EU, and supported the investigation with cryptocurrency, malware, decryption and forensic analysis.