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APT Groups. From Our Analysts.

Profiles and analysis of APT groups and state-linked threat actors: who they target, which tools and techniques they use, and how to defend against them.

All471 APT Groups94 Dark Web28 Digital Risk Protection122 Fraud14 Ransomware48 Sector Analysis34 VIP Security7
APT33 cyber threat visualization showing the group’s operations targeting energy, defense, and aerospace sectors in the Middle East and beyond.APT Groups APT33 (Elfin / Refined Kitten): Iran’s Longstanding Cyber-Espionage Arm APT33, also known as Elfin or Refined Kitten, is Iran’s long-running cyber-espionage group targeting global defense, energy, and aerospace sectors with evolving tactics and tools. Nov 11, 20258 Min Stylized tiger with glowing eyes in a hoodie representing the Hazy Tiger APT group targeting South Asia.APT Groups Hazy Tiger: An Emerging Espionage Threat in South Asia Hazy Tiger is a South Asia-linked APT group active since 2013, targeting government, defense, and energy sectors through sophisticated espionage campaigns involving phishing, malware, and custom… Nov 06, 20256 Min Illustration of Razor Tiger wearing a tiger mask and hoodie symbolizing India-linked cyber espionage operations.APT Groups RAZOR TIGER: The Persistent South Asian Espionage Threat Razor Tiger (APT-C-17), also known as SideWinder, is a long-standing India-linked APT group active since 2012. Its evolving espionage campaigns now target South Asian governments, defense,… Nov 05, 20254 Min UNC4841 APT Card summarizing China-linked cyber-espionage activity since 2021.APT Groups UNC4841 / SLIME57: China-Linked Espionage Threat Expanding Global Operations UNC4841, also known as SLIME57, is a China-linked APT group active since 2021, conducting cyber-espionage across government, defense, and tech sectors. Exploiting zero-day vulnerabilities and maintaining… Nov 04, 20255 Min Hooded cyber operator using a typewriter, symbolizing Ghostwriter APT's hybrid disinformation and espionage tactics.APT Groups Ghostwriter: Hybrid Influence and Espionage Operations in Eastern Europe Ghostwriter, a Belarus/Russia-linked APT active since 2016, executes hybrid campaigns combining espionage, phishing, and disinformation against NATO and EU entities. Learn how these operations evolved into… Oct 29, 20255 Min Illustration of GhostEmperor APT with a hooded figure wearing a digital crown symbolizing cyber espionage and stealth operations.APT Groups GhostEmperor: Advanced China-Linked Espionage Campaigns GhostEmperor is a China-linked APT active since 2019, leveraging stealthy rootkits like Demodex to conduct espionage across Asia, the Middle East, and Africa. Known for its… Oct 28, 20254 Min Illustration of Earth Estries, a China-linked APT group conducting global cyber-espionage campaigns.APT Groups Earth Estries – Threat Actor Sheet Earth Estries is a China-linked APT group active since the early 2020s, known for espionage campaigns targeting global governments, research institutions, and critical infrastructure. By 2025,… Oct 27, 20254 Min Illustration of Lazarus Group hacker wearing a hood and red cyber glasses representing North Korea–linked cyber threat actorAPT Groups The Lazarus Group: Espionage, Sabotage, and Cybercrime Under One Umbrella The Lazarus Group — a North Korea–linked APT — has executed some of the most disruptive cyberattacks in modern history. From Sony Pictures to billion-dollar crypto… Oct 17, 20259 Min Illustration of Larva-208, a Russia-aligned hybrid cyber threat actor operating ransomware and espionage campaignsAPT Groups Larva208: A Hybrid Threat Actor to Watch Larva208 has rapidly emerged as one of the most alarming Russia-aligned hybrid threat actors, merging financial cybercrime with espionage campaigns targeting European and NATO-affiliated organizations. Oct 13, 20254 Min Illustration of Silent Lynx APT cyber threat actor with a hood and glowing red eyesAPT Groups Silent Lynx: Up-and-Coming Espionage Threat From Central Asia Silent Lynx is a newly identified APT group operating from Central Asia with a focus on espionage. Using spear-phishing, PowerShell, and Golang implants, the group targets… Oct 06, 20254 Min Illustration of SilverFox APT cyber threat actor with fox mask and red glowing eyesAPT Groups SilverFox APT: Profile, TTPs and Defense SilverFox APT is rapidly evolving into one of 2025’s most dangerous cyber threat actors. Combining espionage with financial motives, it exploits edge devices, cloud identities, and… Sep 30, 20254 Min Gamaredon APT card with masked hacker image representing Russian cyber espionage groupAPT Groups Gamaredon Group: A Persistent Russian Espionage Threat Gamaredon is a Russia-linked APT active since 2013, targeting Ukraine, NATO, and critical sectors. Using phishing, malware, and custom backdoors, the group continues to evolve into… Sep 29, 20254 Min
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FAQ

About The Blog.

Last updated June 9, 2026

  • Articles on ransomware, APT groups, the dark web, digital risk protection, fraud, sector analysis and VIP security, written for security teams.

  • New articles are added several times a month. The newest come first, and every article shows its publish date.

  • Use the topic chips above the list to open one topic, or type a word in the search box. Each topic has its own page.

  • Articles draw on public sources such as CISA advisories, MITRE ATT&CK and ENISA reports. Sources are listed at the end of an article when it cites them.

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  • Brandefense is an AI-driven threat intelligence company. Its platform covers cyber threat intelligence, digital risk protection and external attack surface management. You can request a demo on your own domain from the Request A Demo page.

  • The blog page shows 470 articles. You can open all of them or pick one topic, such as APT Groups, Dark Web, Ransomware or Fraud. Each article shows its publish date.

  • The blog describes its articles as explained by the analysts who track threats. They cover threat actors, dark web activity, ransomware and digital risk. The newest articles appear first.

  • Yes. APT Groups is one of the topic chips above the list, and it opens only the articles on that topic. The Knowledge Hub also holds profiles of threat groups.

  • The surface web is the part of the internet that search engines list. The deep web is content that search engines do not list, such as pages behind a login. The dark web needs special software to reach. The blog has an article that explains the three layers in plain words.