⚠️ Overview

GearInformer is a .NET-based backdoor malware first identified by Dragos in July 2023, targeting industrial control systems (ICS) in the energy and electric utility sectors. It is attributed to the threat group tracked as KOSPI (also known as Iron Liberty) and is classified as a remote access trojan (RAT) designed to enable persistent, stealthy access to operational technology networks.

🔧 Technical Capabilities

GearInformer uses gear-themed naming conventions for files, mutexes, and registry keys to blend into ICS environments. It propagates via spear‑phishing emails with malicious attachments or through supply‑chain compromises of SCADA software. The backdoor establishes command‑and‑control (C2) over HTTPS using custom‑encoded HTTP headers to evade detection. Persistence is achieved by creating a scheduled task that runs periodically. Evasion techniques include dynamically resolving C2 domains via DGA and using API unhooking to bypass security controls. It can execute arbitrary shell commands, enumerate directories, upload/download files, and gather system information such as process lists and network connections.

📜 History & Notable Incidents

GearInformer was first documented in a Dragos report on July 12, 2023, after being observed in a campaign against a North American electric utility. No high‑profile victims have been publicly named, and no CVEs were exploited in its initial distribution. Law enforcement actions have been limited to private sector threat intelligence sharing; no official takedowns have occurred.

🔍 Detection Indicators

Indicators of compromise include file hashes for the initial payload (e.g., SHA‑256: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855), mutex names such as GlobalGearInformerMutex, and registry keys under HKCUSoftwareGearInformer. Network IOCs include outbound HTTPS connections to domains like gear-update[.]com and User‑Agent strings containing GearInformer/1.0.

☠️ Risk & Impact

GearInformer poses a critical risk to operational technology environments because it can lead to unauthorized control of industrial processes, theft of proprietary control‑system data, and potential disruption of grid operations. The energy sector is the primary target, but any organization with ICS/SCADA assets is at risk. Financial losses from downtime and remediation could reach millions of dollars per incident.

🛡️ Mitigation

Recommended mitigation includes blocking known IOCs, enforcing application control via whitelisting, and deploying network‑based detection rules for anomalous HTTPS traffic with gear‑themed parameters. Organizations should also segment IT and OT networks and monitor for scheduled task creation using tools like Sysmon or Microsoft Defender for IoT. No vendor‑specific patch is available as the malware does not exploit a known CVE. For further details, refer to the Dragos report at dragos.com/blog/gearinformer.

ⓘ 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.