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Impersonating IT support: how threat actors turn a remote session into enterprise-wide access

Microsoft Threat Intelligence observed a human-operated intrusion campaign that abuses Microsoft Teams external collaboration to impersonate IT support, gain remote access, and deploy a Node.js-based implant. Learn how attackers move from social engineering to lateral movement using legitimate tools, and how Microsoft Defender helps detect and disrupt the activity. The post Impersonating IT support: how threat actors turn a remote session into enterprise-wide access appeared first on Microsoft …

Breeze Comet Executes Hundreds of Fraudulent Transactions via Brazilian Payment Systems

Brazilian financial services, retail, and e-commerce organizations have become the target of a financially motivated threat actor dubbed Breeze Comet (formerly UNC5669) since 2024. Google Threat Intelligence Group (GTIG) and Mandiant teams described the threat actor as "specializing in manipulating payment systems and banking software in Brazil to conduct fraudulent transfers." The adversary

Financially Motivated Threat Actor BREEZE COMET Targets Brazil

Introduction Beginning in 2024 Mandiant investigated a string of compromises affecting Brazilian financial services, retail, and eCommerce organizations. Google Threat Intelligence Group (GTIG) tracks this activity as BREEZE COMET (formerly UNC5669), a financially motivated threat actor specializing in manipulating payment systems and banking software in Brazil to conduct fraudulent transfers. This activity overlaps with operations publicly reported as Plump Spider and SHADOW-AETHER-064. In thi…

31st August – Threat Intelligence Report

For the latest discoveries in cyber research for the week of 31st August, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Manchester Airports Group, the UK operator of Manchester, London Stansted, and East Midlands airports, has disclosed a cyberattack that exposed data belonging to about 8.7 million customers. The compromised information includes contact details, […] The post 31st August – Threat Intelligence Report appeared first on Check Point Research.

TerminalFix campaign deploys a reverse tunnel through multistage intrusion

Microsoft Threat Intelligence provides analysis of a ClickFix campaign that uses fake CAPTCHA prompts, DLL sideloading, and a reverse tunnel, with detections and hunting guidance. The post TerminalFix campaign deploys a reverse tunnel through multistage intrusion appeared first on Microsoft Security Blog.

How Threat Research and MDR Help SMBs Build a Defensive Edge

Threat research gives security teams insight into how attackers operate, while MDR turns that intelligence into faster detection and response. ESET explains how combining threat intelligence, continuous monitoring, and human expertise can help SMBs strengthen their defenses. [...]

When AI infrastructure becomes the target: Securing gateways and control points

Microsoft Threat Intelligence examines attacks on exposed AI workloads, including LiteLLM gateway exploitation, credential harvesting, persistence, and cryptomining activity. The post When AI infrastructure becomes the target: Securing gateways and control points appeared first on Microsoft Security Blog.

Hackers target Microsoft SharePoint RCE chain with PoC exploit

Attackers are now targeting a chain of two Microsoft SharePoint vulnerabilities that can allow them to execute arbitrary code on unpatched servers, according to threat intelligence company Defused. [...]

Tortoiseshell: New Toolset and Operational Infrastructure Exposed

Group-IB Threat Intelligence performed enrichment and APT hunting based on recent public data about the Tortoiseshell APT group, leading to the discovery of new samples sharing similarities with known Tortoiseshell malware and additional operational infrastructure.

24th August – Threat Intelligence Report

For the latest discoveries in cyber research for the week of 24th August, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Latvia’s Road Traffic Safety Directorate (CSDD) has confirmed a breach affecting payment records of more than 1.2 million people – roughly two-thirds of the country’s population – as well as 200,000 organizations. The […] The post 24th August – Threat Intelligence Report appeared first on Check Point Research.

Fake Conferences, OAuth and WhatsApp: Inside Russia’s New Espionage Tactics

Google tracks three Russia-linked espionage clusters using phishing and legitimate authentication tools to target researchers, diplomats and defense staff. Google’s Threat Intelligence Group tracked three separate suspected Russia-linked cyber espionage clusters. All three focus on the same thing: abusing authentication features that are supposed to protect accounts to access them instead. Threat actors target researchers, […]

Manic: The Android Malware That Exfiltrates Data Even When the Phone Is Offline

Manic Android malware combines banking fraud and spyware, using a Bluetooth relay to steal data even when devices are offline. ThreatFabric’s Mobile Threat Intelligence team has identified a new Android malware, dubbed Manic, which has been active in the wild since at least February 2026. The researchers state that the malware is still under development […]

Going with the Flow(s): Distinct Clusters Target Individuals of Interest to Russia

Written by: Gabby Roncone, Wesley Shields Overview Google Threat Intelligence Group (GTIG) is tracking three distinct suspected Russian cyber espionage threat clusters abusing legitimate authentication flows to target individuals working in academia, aerospace and defense, governments and think tanks across Europe, as well as academia and think tanks within the United States. Examples of these techniques can be found in our previous blog on UNC6293’s phishing operations. We now track an additio…

Staying Ahead of Adversarial AI Through Agentic Source Code Review

Written by: Alex Tselevich, Michael Maturi Introduction Adversarial misuse of AI has increased the risk of data theft and extortion events, because when proprietary source code is exposed, defenders must scramble to identify and patch vulnerabilities while attackers deploy machine-speed AI tools against them. By structuring the analysis process, enforcing skeptical validation steps, and injecting domain-specific human expertise directly into the pipeline, we’ve achieved a leap in efficacy. Comb…

Detecting cloud ransomware in Azure with Tenable One’s cloud detection and response capabilities

Learn how Tenable One Cloud Exposure helps you unmask the sophisticated tactics of cybercrime group Storm-0501, which carries out Azure-based cloud ransomware campaigns. Tenable One Cloud Exposure uses AI-powered threat stories to expose Storm-0501 TTPs, backed by precision-engineered threat detection alerts.Key takeawaysStorm-0501 demonstrates that cloud-first ransomware groups have shifted from simple endpoint encryption to the total hijacking of cloud tenants.Storm-0501 systematically neutra…

17th August – Threat Intelligence Report

For the latest discoveries in cyber research for the week of 17th August, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES Colombia’s Ministry of Justice has experienced a ransomware attack that affected part of its technology infrastructure and disrupted public services related to illicit-drug monitoring and legal processes. Officials confirmed that some files were […] The post 17th August – Threat Intelligence Report appeared first on Check Point Research.

Hackers Spend Nearly $7 Million on Expired Domains to Redirect Traffic to Scams and Malware

Threat actors are acquiring expired domains to inherit website traffic and reputation to redirect victims to scams and malware on a large scale. DNS threat intelligence firm Infoblox has given the name dropcatch domains to those that get a second chance, where an expired domain becomes available for registration and is then snapped up by another party. During the first half of 2026, 50,400

Max severity SAP Commerce Cloud flaw now targeted in attacks

A maximum-severity SAP Commerce Cloud remote code execution vulnerability patched three days ago is already being targeted in attacks, according to threat intelligence company Defused. [...]

Malicious LiteLLM Releases Tied to Trivy Hack May Have Exposed 2,100+ Organizations

Two malicious LiteLLM releases sat on PyPI for about 40 minutes in March carrying credential-stealing code capable of harvesting cloud keys, SSH keys, Kubernetes tokens, database passwords, and other secrets from systems that installed them. Threat intelligence firm CloudSEK now says a dataset it obtained, built from roughly 434,000 files the attackers captured, maps potential exposure to more

China-Linked Hackers Deploy New StormEncryptor Ransomware, Likely via N-central Flaw

Microsoft has disclosed that Storm-1175, a financially motivated threat actor linked to China, has deployed a previously undocumented ransomware strain called StormEncryptor. The use of StormEncryptor marks a shift from the adversary's previous use of Medusa ransomware, the Microsoft Threat Intelligence Team said. "StormEncryptor is written in C++ and appends the file name extension .encrypted

Microsoft named a Leader in the 2026 IDC MarketScape for MDR/MXDR for the Enterprise

Microsoft is named a Leader in the 2026 IDC MarketScape for MDR services. Discover how Microsoft Defender Experts MDR combines AI, threat intelligence, and human expertise. The post Microsoft named a Leader in the 2026 IDC MarketScape for MDR/MXDR for the Enterprise appeared first on Microsoft Security Blog.

DeadLock ransomware: Breaking down a Rust-based encryptor with decentralized recovery infrastructure

Microsoft Threat Intelligence examines DeadLock ransomware, an emerging financially motivated operation distinguished by its use of decentralized infrastructure to support victim communications, negotiations, and data leak operations alongside double extortion tactics used to pressure victims. The post DeadLock ransomware: Breaking down a Rust-based encryptor with decentralized recovery infrastructure appeared first on Microsoft Security Blog.

10th August – Threat Intelligence Report

For the latest discoveries in cyber research for the week of 10th August, please download our Threat Intelligence Bulletin. TOP ATTACKS AND BREACHES North Carolina Ports, the US authority operating the ports of Wilmington, Morehead City and others, has suffered a cyberattack that forced some operations onto manual processes. The authority claims it has contained […] The post 10th August – Threat Intelligence Report appeared first on Check Point Research.

Building Scalable Bridges Between Systems Using The Latest Release of Our Ciaops Library

ciaops is Group-IB's open-source Python library for integrating Threat Intelligence, Digital Risk Protection, and Attack Surface Management APIs. Zero event loss, guaranteed.

UNC6671 Rebrands: Multi-Brand Vishing Extortion Targets Financial Services and Enterprise Cloud Environments

Written by: Tyler McLellan, Austin Larsen Introduction Google Threat Intelligence Group (GTIG) continues to track UNC6671 actively conducting compromises leading to data theft extortion, despite the alleged announced retirement of the BlackFile extortion brand in May 2026. Telemetry and infrastructure analysis reveal that rather than disbanding, UNC6671 has diversified its operations across multiple extortion fronts including Redact, Pink, Helix, and Falcon. UNC6671 continues to rely on voice p…

Proofpoint Launches OEM Program to Help Security Providers Embed Trusted Threat Intelligence and Detection Capabilities