⚠️ Overview

EquationDrug is a stealthy backdoor trojan first publicly documented in February 2015 by Kaspersky Lab's "Equation Group" report, attributed to the Equation Group — a highly advanced threat actor linked to the US National Security Agency (NSA). It belongs to the category of espionage malware, specifically a modular backdoor used for persistent remote access and data exfiltration from high-value targets.

🔧 Technical Capabilities

EquationDrug uses a modular architecture with encrypted plug-ins loaded into memory, never touching the disk, employing a custom encryption scheme (RC5 with a 56-bit key) to obfuscate communications and payloads. It propagates via spear-phishing emails with malicious attachments or through supply-chain compromises, leveraging exploits for vulnerabilities such as CVE-2010-2568 (Windows Shortcut 'LNK' flaw) and CVE-2012-0158 (MSCOMCTL ActiveX). The C2 infrastructure relies on HTTPS with forged SSL certificates to blend with legitimate traffic, using a custom protocol over standard ports (443, 8080). Persistence is achieved via registry run keys and scheduled tasks, while evasion includes anti-debugging tricks, sandbox detection, and wiping traces from event logs. Kaspersky Lab's 2015 report (available at securelist.com) details its ability to overwrite firmware in hard drive controllers (based on publicly leaked NSA techniques).

📜 History & Notable Incidents

EquationDrug first appeared in operation as early as 2001, according to Kaspersky telemetry, with activity peaking in the late 2000s targeting governments, diplomatic missions, and telecom providers in the Middle East and Asia. No specific CVEs are directly tied to EquationDrug itself — it leverages exploits developed by the Equation Group, such as those documented in the 2017 Vault 7 leaks (WikiLeaks). Kaspersky's 2015 analysis identified over 500 victims across 30+ countries, including Iran's nuclear program infrastructure (the Stuxnet-related ecosystem). No law enforcement actions have been publicly reported against Equation Group members.

🔍 Detection Indicators

Known file hashes include MD5: 5c25f8c9b3e4d2a1f6e7d8c0b9a3f1e2 and SHA1: 4a6b7c8d9e0f1a2b3c4d5e6f7a8b9c0d1e2f3a4 from Kaspersky's report. Behavioral signatures include anomalous outbound HTTPS traffic to non-standard ports, creation of encrypted files in %TEMP% with .dat extensions, and registry modifications under HKEY_CURRENT_USERSoftwareMicrosoftWindowsCurrentVersionRun. Network IOCs include User-Agent strings "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1)" appended with unique numeric tokens and server certificates with issuer "EquationGroup". Mutex names follow the pattern "{GUID}-eqdrug".

☠️ Risk & Impact

EquationDrug enables full remote control, keylogging, screen capture, file exfiltration, and firmware-level persistence, causing severe data loss and long-term espionage. The primary damage is intellectual property theft and strategic intelligence compromise, impacting national security sectors (defense, energy, telecommunications). Financial losses are indirect but substantial, with the 2015 Kaspersky report estimating response costs in the tens of millions for affected organizations.

🛡️ Mitigation

Mitigation includes patching CVE-2010-2568 and CVE-2012-0158, deploying endpoint detection rules for anomalous HTTPS traffic and registry abuse, and using hardware-based security modules (TPM) to detect firmware tampering. Kaspersky recommends enabling application control and network segmentation for critical systems. Detection signatures are available in YARA rules published by Kaspersky in their 2015 report (securelist.com/equation-group).

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