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Threat hunting as a critical component of mature security programs

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Threat hunting is an essential practice for mature security programs. It involves proactively searching for threats that may have bypassed existing defenses, rather than merely reacting to alerts. This practice requires a mindset of curiosity and suspicion, and it involves simulating attacks to understand adversary behavior and building a baseline of normal activity to detect anomalies. Effective threat hunting requires access to comprehensive, well-structured data, and it should be practiced regularly to develop instincts and improve detection capabilities.

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  1. 04.09.2025 17:00 📰 1 articles · ⏱ 12d ago

    Threat hunting as a critical component of mature security programs

    Threat hunting is an essential practice for mature security programs. It involves proactively searching for threats that may have bypassed existing defenses, rather than merely reacting to alerts. This practice requires a mindset of curiosity and suspicion, and it involves simulating attacks to understand adversary behavior and building a baseline of normal activity to detect anomalies.

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Similar Happenings

Chinese State-Sponsored Actors Targeting Global Critical Infrastructure

Chinese state-sponsored Advanced Persistent Threat (APT) actors, specifically the Salt Typhoon group, are conducting a sustained campaign to gain long-term access to critical infrastructure networks worldwide. These actors exploit vulnerabilities in routers and other edge network devices used by telecommunications providers, ISPs, and other infrastructure operators. The campaign targets telecommunications, transportation, lodging, government, and military networks. The actors employ tactics to evade detection and maintain persistent access, posing a significant threat to national and economic security. The advisory provides actionable guidance to help organizations strengthen their defenses and protect critical systems. The campaign has targeted at least 600 organizations across 80 countries, including 200 in the U.S. The advisory details how state-backed threat actors, including Salt Typhoon, penetrate networks around the world and how defenders can protect their own environments. The advisory tracks this cluster of activity to multiple advanced persistent threats (APTs), though it partially overlaps with Salt Typhoon. The advisory notes that the actors have had considerable success exploiting publicly known vulnerabilities, including Ivanti Connect Secure, Ivanti Policy Secure, Palo Alto Networks PAN-OS, and Cisco IOS XE vulnerabilities. The advisory suspects that the APT actors may target other devices, including Fortinet firewalls, Juniper firewalls, Microsoft Exchange, Nokia routers and switches, Sierra Wireless devices, and Sonicwall firewalls. The actors use multiple tactics to maintain persistence, including modifying Access Control Lists (ACLs), opening standard and non-standard ports, enabling SSH servers, and creating tunnels over protocols. The actors target protocols and infrastructure involved in authentication, such as Terminal Access Controller Access Control System Plus (TACACS+), to facilitate lateral movement across network devices. The advisory provides extensive recommendations for mitigating these threats, including monitoring network device configuration changes, auditing network services and tunnels, and checking logs for integrity. The advisory highlights a critical shift from Chinese state-sponsored activity from being purely espionage to gaining long-term access for potential disruption. 45 previously unreported domains associated with Salt Typhoon and UNC4841 have been discovered, dating back to May 2020. The oldest domain identified is onlineeylity[.]com, registered on May 19, 2020. The domains were registered using Proton Mail email addresses and fake personas. The domains point to high-density and low-density IP addresses, with the earliest activity traced back to October 2021. The domains are linked to Chinese cyber espionage campaigns, with potential overlaps between Salt Typhoon and UNC4841.

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