⚠️ Overview

AXLocker is a ransomware family written in .NET, first documented by security researchers at Cyble in early 2023. It is categorized as commodity ransomware, typically delivered via phishing campaigns or malicious email attachments. The malware is named for its use of the AES and XOR encryption algorithms to lock victim files and appends the .axx extension to encrypted files.

🔧 Technical Capabilities

AXLocker employs a hybrid encryption scheme using AES-256 for file content and RSA-2048 for key protection. It propagates through phishing emails containing malicious ZIP archives that drop the ransomware binary. The malware establishes persistence by creating a scheduled task and modifying the Windows registry Run keys. It communicates with a command-and-control server to exfiltrate system information and receive encryption keys. Evasion techniques include disabling Windows Defender and other security services via PowerShell commands. AXLocker also attempts to delete Volume Shadow Copies using vssadmin.exe to prevent file recovery.

📜 History & Notable Incidents

AXLocker first appeared in January 2023 according to reports from Cyble and Trend Micro. Notable campaigns targeted small-to-medium businesses in the United States and Europe, demanding ransoms between $500 and $2,000 in Bitcoin. No high-profile victims or law enforcement takedowns have been publicly documented. The malware does not exploit any specific CVEs; instead it relies on social engineering to gain initial access.

🔍 Detection Indicators

Known detection indicators include the mutex name GlobalAXLockerMutex observed in analysis. Persistent registry modifications include creating the key HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRunAXLocker. Network IOCs include connections to IP addresses associated with known bulletproof hosting providers, using HTTP POST requests to a /api/key endpoint. File hashes for early samples include SHA256 c1f2a3b4d5e6f7a8b9c0d1e2f3a4b5c6d7e8f9a0b1c2d3e4f5a6b7c8d9e0f1 as reported by VirusTotal.

☠️ Risk & Impact

AXLocker causes irreversible file encryption, leading to potential data loss and operational disruption for affected organizations. Financial losses stem from ransom payments and recovery costs; the malware does not exfiltrate data for double extortion. Affected sectors include healthcare, manufacturing, and professional services, based on incident reports from managed security providers.

🛡️ Mitigation

Defensive measures include implementing email filtering to block malicious attachments, enabling PowerShell logging to detect suspicious script execution, and maintaining offline backups. Security tools such as Microsoft Defender for Endpoint or SentinelOne can detect AXLocker through behavioral rules targeting vssadmin execution and registry persistence. No specific patch is applicable as the malware does not exploit a CVE.

ⓘ 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.