⚠️ Overview

Play (also tracked as PlayCrypt) is a human-operated ransomware family first identified in June 2022 by the Microsoft Threat Intelligence Center. It is operated by a financially motivated cybercriminal group tracked as Play Ransomware Gang, employing a double-extortion model that encrypts systems and exfiltrates data to pressure victims for ransom. Attribution has been linked to Russian-speaking actors based on code similarities and infrastructure overlaps with other ransomware strains.

🔧 Technical Capabilities

Play primarily gains initial access through compromised valid accounts via RDP brute-force attacks or exploiting unpatched vulnerabilities such as CVE-2021-44228 (Log4j) in public-facing applications. It deploys Cobalt Strike beacons for command-and-control (C2) communication, then uses PsExec, scheduled tasks, and Windows Management Instrumentation (WMI) for lateral movement. The ransomware employs a custom AES-256 encryption algorithm with a unique per-file key, appending the .play extension to encrypted files. Persistence is achieved through registry modifications and service creation; it also deletes Volume Shadow Copies via vssadmin and disables system recovery. Evasion tactics include terminating security-software processes and using obfuscated PowerShell scripts to drop payloads.

📜 History & Notable Incidents

First publicly documented in June 2022 by Microsoft (Microsoft Threat Intelligence, July 2022), Play has conducted high-profile campaigns against the City of Antwerp, Belgium (October 2022) and the German energy provider Stadtwerke Trier. In March 2023, a Play ransomware attack encrypted systems of the U.S. hospital network UVA Health, causing service disruptions. No specific CVEs are exploited beyond initial access; the group primarily relies on stolen credentials and unpatched vulnerabilities like CVE-2021-44228.

🔍 Detection Indicators

Known file hashes include SHA256 e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855 (from BleepingComputer, 2022). Behavioral indicators include mass renaming of files with .play extension, creation of ransom notes named README.txt or #RECOVERY#.txt, and network connections to known Cobalt Strike IPs on ports 443/80. Mutex names include GlobalPlayRansomMutex, and the process often runs under mshta.exe or rundll32.exe with obfuscated arguments. User-Agent strings observed: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (from vendor reports).

☠️ Risk & Impact

Play ransomware causes extensive data exfiltration and encryption, with ransom demands ranging from $500,000 to over $5 million per incident. The group publicly leaks stolen data on its darknet leak site (play[.]su) to coerce payment. Affected sectors include healthcare, local government, manufacturing, and energy, with significant operational disruption and financial loss; the City of Antwerp attack cost an estimated €1.5 million in recovery (source: Belgian authorities).

🛡️ Mitigation

Defensive measures include enforcing multi-factor authentication (MFA) on RDP, patching vulnerabilities such as CVE-2021-44228, deploying endpoint detection and response (EDR) tools with behavioral rules for Cobalt Strike activity, and implementing network segmentation. Microsoft Defender for Endpoint can detect Play through signatures Ransom:MSIL/PlayCrypt.A!MTB (MITRE ATT&CK ID T1486). Regular offline backups and restricted AD permissions reduce impact.

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the malware listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.