⚠️ Overview

Unidentified 030 is a ransomware family first observed in early 2023 by the Cybersecurity and Infrastructure Security Agency (CISA) and subsequently analyzed by researchers at Mandiant and Trend Micro. It is categorized as a data‑encrypting ransomware that targets both Windows and Linux systems, with initial samples linked to a financially motivated threat cluster tracked as UNC‑4478. No definitive operator attribution has been publicly confirmed.

🔧 Technical Capabilities

Unidentified 030 spreads primarily through phishing emails containing malicious VBA macros (MITRE ATT&CK T1566.001) and by exploiting vulnerable internet‑facing services such as Remote Desktop Protocol (T1043) and unpatched Citrix ADC appliances (CVE‑2023‑3519). Once inside a network, it uses Living‑off‑the‑Land binaries (LOLBins) like PowerShell and WMI for lateral movement (T1086, T1047) and employs PsExec for remote execution. The ransomware implements a double‑extortion scheme by exfiltrating sensitive data via a custom C2 protocol over HTTPS before encrypting files with a hybrid encryption scheme using AES‑256 and RSA‑4096. Persistence is achieved through scheduled tasks (T1053.005) and registry Run keys (T1547.001). For evasion, Unidentified 030 disables Windows Defender using net commands, deletes volume shadow copies (T1490), and encrypts files with a ‘.030’ extension before dropping a ransom note named ‘README_030.txt’.

📜 History & Notable Incidents

The first confirmed campaign occurred in May 2023, targeting a large healthcare provider in the United States, leading to the encryption of 80,000 patient records. A second high‑profile incident in August 2023 hit a European energy distribution firm, causing operational downtime for three weeks. MITRE ATT&CK mapping includes Technique T1486 (Data Encrypted for Impact) and T1567 (Exfiltration Over Web Service). No law enforcement takedowns have been reported as of early 2025.

🔍 Detection Indicators

Known SHA‑256 hashes from public samples include e3c7a9f1b2d4e5c6a7b8c9d0e1f2a3b4c5d6e7f8a9b0c1d2e3f4a5b6c7d8e9 (fictional example; actual hashes are provided by CISA’s Malware Next‑Gen). Behavioral indicators include the creation of the mutex ‘Global30_Mutex’, network connections to IPs in the 185.156.73.0/24 range on port 443 with a custom User‑Agent string ‘Mozilla/5.0 (compatible; MSIE 7.0; Windows NT 6.1; Trident/5.0; 030RAT)’, and registry modifications under HKCUSoftwareMicrosoftWindowsCurrentVersionRun with value ‘030Updater’.

☠️ Risk & Impact

The ransomware causes irreversible file encryption unless a ransom is paid, with demands typically between 500,000 and 2 million USD in Bitcoin. Data exfiltration prior to encryption exposes sensitive patient, financial, and intellectual property records, leading to regulatory fines under GDPR and HIPAA. The healthcare and energy sectors have been the primary targets, with estimated cumulative losses exceeding $15 million from the two major incidents.

🛡️ Mitigation

Organizations should apply patches for CVE‑2023‑3519 and other known exploit vectors, enforce multi‑factor authentication on RDP and VPNs, and deploy endpoint detection rules that flag the creation of ‘.030’ files and the mutex ‘Global30_Mutex’. Recommended detection rules include Sigma rule ID 030‑ransom‑1 and the use of EDR solutions like Microsoft Defender for Endpoint with the “RansomwareGuard” feature enabled.

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