Cyberattacker techniques, tools, and infrastructure

Cyberattackers constantly evolve their techniques, tools, and infrastructure to launch increasingly complex attacks. Learn about the latest tactics and how to detect, disrupt, and defend against them.

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September 25

13 min read

XCSSET evolves again: Analyzing the latest updates to XCSSET’s inventory

Microsoft Threat Intelligence has uncovered a new variant of the XCSSET malware, which is designed to infect Xcode projects, typically used by software developers building Apple or macOS-related applications.
August 27

23 min read

Storm-0501’s evolving techniques lead to cloud-based ransomware

Financially motivated threat actor Storm-0501 has continuously evolved their campaigns to achieve sharpened focus on cloud-based tactics, techniques, and procedures (TTPs).
August 21

26 min read

Think before you Click(Fix): Analyzing the ClickFix social engineering technique

The ClickFix social engineering technique has been growing in popularity, with campaigns targeting thousands of enterprise and end-user devices daily.
August 18

16 min read

Dissecting PipeMagic: Inside the architecture of a modular backdoor framework

A comprehensive technical deep dive on PipeMagic, a highly modular backdoor used by Storm-2460 masquerading as a legitimate open-source ChatGPT Desktop Application.
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July 31

13 min read

Frozen in transit: Secret Blizzard’s AiTM campaign against diplomats

Microsoft Threat Intelligence has uncovered a cyberespionage campaign by the Russian state actor we track as Secret Blizzard that has been ongoing since at least 2024, targeting embassies in Moscow using an adversary-in-the-middle (AiTM) position to deploy their custom ApolloShadow malware.
July 16

7 min read

Protecting customers from Octo Tempest attacks across multiple industries

To help protect and inform customers, Microsoft highlights protection coverage across the Microsoft Defender security ecosystem to protect against threat actors like Octo Tempest.
June 30

18 min read

Jasper Sleet: North Korean remote IT workers’ evolving tactics to infiltrate organizations

Since 2024, Microsoft Threat Intelligence has observed remote IT workers deployed by North Korea leveraging AI to improve the scale and sophistication of their operations, steal data, and generate revenue for the North Korean government.
May 29

12 min read

Defending against evolving identity attack techniques

Threat actors continue to develop and leverage various techniques that aim to compromise cloud identities.
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May 27

16 min read

New Russia-affiliated actor Void Blizzard targets critical sectors for espionage

Microsoft Threat Intelligence has discovered a cluster of worldwide cloud abuse activity conducted by a threat actor we track as Void Blizzard, who we assess with high confidence is Russia-affiliated and has been active since at least April 2024.
May 21

15 min read

Lumma Stealer: Breaking down the delivery techniques and capabilities of a prolific infostealer

Over the past year, Microsoft Threat Intelligence observed the persistent growth and operational sophistication of Lumma Stealer, an info-stealing malware used by multiple financially motivated threat actors to target various industries.
May 12

10 min read

Marbled Dust leverages zero-day in Output Messenger for regional espionage

Since April 2024, the threat actor that Microsoft Threat Intelligence tracks as Marbled Dust has been observed exploiting user accounts that have not applied fixes to a zero-day vulnerability (CVE-2025-27920) in the messaging app Output Messenger, a multiplatform chat software.
April 23

14 min read

Understanding the threat landscape for Kubernetes and containerized assets

The dynamic nature of containers can make it challenging for security teams to detect runtime anomalies or pinpoint the source of a security incident, presenting an opportunity for attackers to stay undetected.