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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.

All498 APT Groups85 Dark Web31 Digital Risk Protection126 Fraud16 Ransomware51 Sector Analysis34 VIP Security7
AI-rendered depiction of Sandworm APT44 as a cyber-themed worm emerging from a tunnel, used in Brandefense threat intelligence visuals.APT Groups Sandworm (APT44): Russia’s Most Destructive Cyber Weapon Sandworm (APT44) is Russia’s most destructive state-sponsored cyber unit. Known for NotPetya, Industroyer, and AcidPour, the group targets critical infrastructure across Ukraine, NATO states, and Europe,… Nov 23, 20256 Min Illustration of a hooded cyber actor representing APT37 (Famous Chollima) working on a laptop with DPRK-themed neon lighting.APT Groups APT37: North Korea’s Active Cyberespionage Group APT37 (Famous Chollima) remains one of North Korea’s most active and adaptive cyberespionage groups. This analysis highlights their 2025 evolution—cloud persistence, AI-driven social engineering, new RAT… Nov 22, 20254 Min Hooded figure representing APT42, the Iranian cyber espionage group, on Brandefense APT card.APT Groups APT42: Iran’s Shadow Operative in Global Cyberspace 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… Nov 21, 20255 Min Illustration of Muddy Water APT attacker wearing a hooded jacket with a stylized reptile mask, representing Iran-linked threat activity.APT Groups MuddyWater: Iran-Linked Espionage Group Expanding Global Reach 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… Nov 20, 20254 Min Visual depiction of APT41 with glowing red eyes and a mask, representing a Chinese state-linked cyber threat actor.APT Groups APT41: China’s Dual-Purpose Cyber Powerhouse APT41 is one of China’s most versatile APT groups, combining espionage, large-scale supply chain compromises, and financially motivated intrusions targeting telecom, government, and technology sectors worldwide. Nov 17, 20256 Min Visual card depicting APT36, an espionage-focused threat actor active since 2013.APT Groups Operation C-Major (APT36): A Persistent Pakistan-Linked Cyber Espionage Threat APT36 is a Pakistan-linked APT group active since 2013, known for targeting government, military, and research sectors with phishing, RATs, and Android spyware. Nov 16, 20256 Min Illustrative APT28 threat card featuring a bear symbolizing Russian state-linked cyber operations.APT Groups APT28: Russia’s Persistent Cyber Espionage Arm APT28 (Fancy Bear) is one of the most aggressive and persistent Russian state-linked APT groups, known for cyber espionage, Outlook exploits, election interference, and high-impact operations… Nov 15, 20258 Min Illustration of Scattered Spider APT actor wearing a dark hoodie and glowing mask, representing the English-speaking cybercriminal group UNC3944/Octo Tempest.APT Groups Scattered Spider: An Emerging Cybercriminal Collective Scattered Spider (UNC3944/Octo Tempest) is one of the most dangerous financially motivated APT groups active in 2025. Known for large-scale social engineering, SIM swapping, Spectre RAT… Nov 14, 20254 Min 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
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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.

  • The site feed at brandefense.io/feed/ lists new posts. The email sign-up box is on the All Resources and Reports pages.

  • 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 count at the top of the blog page shows the current total, and each topic chip shows how many articles that topic holds. 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.