IronChain Ransomware Threatens Businesses with Permanent Data Loss and Costly Downtime

MITRE Techniques

• [T1053.005] Scheduled Task – IronChain creates and runs a SYSTEM scheduled task named IronChain_SYSTEM for persistence and continued execution (‘creation and execution of the IronChain_SYSTEM scheduled task’).
• [T1068] Exploitation for Privilege Escalation – The sample asks for administrator rights and uses elevated execution paths to reach privileged actions (‘its intended chain asks for administrator rights’).
• [T1543.003] Create or Modify System Process: Windows Service – It starts four driver services and uses service-like components for low-level operations (‘starts four driver services’).
• [T1112] Modify Registry – The article does not explicitly mention registry keys, so no confirmed registry technique is listed.
• [T1562.001] Impair Defenses: Disable or Modify Tools – IronChain attempts to disable the firewall and stop or disable EventLog and Resmon (‘attempts to disable the firewall, and attempts to stop or disable EventLog and Resmon’).
• [T1486] Data Encrypted for Impact – The malware encrypts user files with AES-GCM and RSA-OAEP as part of destructive impact (‘encrypts user files’).
• [T1565.001] Stored Data Manipulation – Its file-handling and encryption logic can leave critical files without a reliable recovery path and mutate bytes before encryption (‘two to seven randomized byte-mutation passes before AES-GCM encryption’).
• [T1490] Inhibit System Recovery – It targets recovery-related components and can leave encrypted data unrecoverable (‘recovery is not guaranteed after payment’ and ‘recovery deletion’).
• [T1070.004] File Deletion – The analysis notes recovery deletion behavior as part of the detection cluster (‘recovery deletion’).
• [T1021.002] SMB/Windows Admin Shares – The intended chain includes spreading through shares and removable media (‘spreads through shares and removable media’).
• [T1119] Automated Collection – It walks common user folders and queues files for processing in a broad file-encryption routine (‘first walks common user folders such as Desktop, Documents, Downloads’).
• [T1016] System Network Configuration Discovery – The sample probes networks and performs geolocation-related lookups (‘probes networks’ and requests to ip-api.com/json/).
• [T1047] Windows Management Instrumentation – No WMI usage is explicitly described, so this technique is not confirmed.
• [T1218] System Binary Proxy Execution – The article does not describe proxy execution via a signed system binary, so this is not confirmed.
• [T1211] Exploitation for Defense Evasion – The BYOVD-style process-kill path uses vulnerable driver behavior to terminate processes (‘implemented BYOVD-style process-kill path’).
• [T1562.004] Disable or Modify System Firewall – IronChain attempts to disable the firewall (‘attempts to disable the firewall’).
• [T1055] Process Injection – No process injection is described in the article, so this technique is not confirmed.
• [T1005] Data from Local System – It targets local user folders and files for encryption (‘walks common user folders’).
• [T1497.001] System Checks: System Language Discovery – No language check is described, so this technique is not confirmed.