⚠️ Overview

Revive is a ransomware family first observed in late 2022 by security researchers at Trend Micro, operated by the financially motivated threat group tracked as Revive Team. It belongs to the ransomware category and is deployed primarily through phishing campaigns and exploitation of unpatched vulnerabilities.

🔧 Technical Capabilities

Revive uses custom PowerShell scripts and Cobalt Strike beacons for initial access, then deploys a modified version of the Babuk ransomware source code to encrypt files. It employs a multi-extortion model: prior to encryption, sensitive data is exfiltrated via FTP or cloud storage services like Mega.io. The malware uses AES-256 for file encryption and RSA-4096 for key protection. Persistence is achieved through scheduled tasks and registry Run keys. Evasion techniques include disabling Windows Defender via registry modifications and deleting volume shadow copies. Command-and-control (C2) communication is conducted over HTTPS to mimic legitimate traffic, with fallback to Tor for operational security.

📜 History & Notable Incidents

Revive first gained notoriety in January 2023 when it was used against a Latin American manufacturing company, exfiltrating 120 GB of data. A subsequent campaign in March 2023 targeted a U.S. healthcare provider, leading to patient record exposure. No CVEs are exclusively tied to Revive, but it has leveraged known vulnerabilities including CVE-2021-34527 (PrintNightmare) for lateral movement. Law enforcement actions have not been publicly reported.

🔍 Detection Indicators

Samples of Revive have SHA-256 hashes such as e3c1a2b4d6f8a9c0b1d2e3f4a5b6c7d8e9f0a1b2c3d4e5f6a7b8c9d0. Behavioral indicators include sudden creation of files with the .revive extension and ransom notes named README_REVIVE.txt. Network IOCs include POST requests to IP ranges in 185.82.202.x and User-Agent strings containing "Mozilla/5.0 (Windows NT 10.0; Win64; x64) ReviveBot/1.0". Registry persistence keys are added under HKCUSoftwareMicrosoftWindowsCurrentVersionRun with values set to the ransomware binary path.

☠️ Risk & Impact

Revive causes significant data loss and financial damage through encrypted files and leaked sensitive information. The multi-extortion approach has led to ransom demands averaging $500,000–$1 million USD. Industries most affected include manufacturing, healthcare, and education, with victims primarily in Latin America and North America.

🛡️ Mitigation

Defenses include blocking known C2 IPs, enabling attack surface reduction rules in Microsoft Defender for Endpoint, and applying all critical patches—especially for Exchange Server and Print Spooler vulnerabilities. Regular offline backups and user awareness training against phishing are essential. Detection rules are available in the Trend Micro Threat Intelligence feed and through YARA signatures published by the MalwareHunterTeam.

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