Latest cybersecurity reporting from selected sources.

The Miasma worm compromised 73 Microsoft GitHub repos, spreading via AI coding tools and stealing cloud credentials from developers and CI/CD systems. A self-replicating worm called Miasma has compromised 73 Microsoft GitHub repositories and forced GitHub staff to disable them. The affected repos include core Azure infrastructure like azure-functions-host and the entire Durable Task family […]

Attackers Compromised More Than 70 Microsoft Repositories in Under 2 MinutesAttackers linked to the Miasma supply-chain campaign compromised a Microsoft contributor account and pushed malicious code into more than 70 repositories, using artificial intelligence-assisted coding tools as an infection path to steal credentials and developer secrets at scale.

A large-scale npm supply chain attack compromised over 90 versions of @redhat-cloud-services packages, silently infecting CI/CD environments and developer systems. The malicious code steals credentials from GitHub, cloud platforms, and local machines, then spreads like a worm by republishing trusted packages. Discover how the attack works, what data is at risk, and the steps you can take to protect your organization. The post Preinstall to persistence: Inside the Red Hat npm Miasma credential-stealing campaign appeared first on Microsoft Security Blog.

A multi-stage attack on Linux devices began with an exposed F5 BIG-IP edge appliance and pivoted to an internal Confluence server for credential theft and identity compromise. Learn how the threat actor attempted Kerberos relay and lateral movement, and how Microsoft Defender detected, blocked, and unraveled the attack. The post From edge appliance to enterprise compromise: Multi-stage Linux intrusion via F5 and Confluence appeared first on Microsoft Security Blog.

Compromised @antv npm packages deploy the Mini Shai-Hulud payload to steal CI/CD secrets from Linux-based automation environments. The malware executes during npm install and targets credentials across GitHub, AWS, Kubernetes, Vault, npm, and 1Password platforms. The post Mini Shai Hulud: Compromised @antv npm packages enable CI/CD credential theft appeared first on Microsoft Security Blog.

Storm-2949 turned stolen credentials into a cloud-wide breach, moving from identity compromise to large-scale data theft without using malware. This incident shows how threat actors can exploit trusted systems to operate undetected. The post How Storm-2949 turned a compromised identity into a cloud-wide breach appeared first on Microsoft Security Blog.

Cybersecurity researchers have disclosed details of a stealthy Python-based backdoor framework called DEEP#DOOR that comes with capabilities to establish persistent access and harvest a wide range of sensitive information from compromised hosts

Organizations typically roll out multi-factor authentication (MFA) and assume stolen passwords are no longer enough to access systems. In Windows environments, that assumption is often wrong. Attackers still compromise networks every day using valid credentials. The issue is not MFA itself, but coverage.  Enforced through an identity provider (IdP) such as Microsoft Entra ID, Okta, or

Cybersecurity researchers have disclosed details of a malware campaign that's targeting software developers with a new information stealer called Evelyn Stealer by weaponizing the Microsoft Visual Studio Code (VS Code) extension ecosystem

A suspected Russia-aligned group has been attributed to a phishing campaign that employs device code authentication workflows to steal victims' Microsoft 365 credentials and conduct account takeover attacks

Microsoft Says Hackers Pivoting to Identity CompromiseHackers are as likely to log in as break in, warns Microsoft in an annual assessment of cyberthreats. During the first half of 2025, identity-based attacks rose by 32% due to credentials stolen by infostealers or password and email combinations plucked from bulk data breaches.

Cybersecurity researchers have shed light on a Chinese-speaking cybercrime group codenamed UAT-8099 that has been attributed to search engine optimization (SEO) fraud and theft of high-value credentials, configuration files, and certificate data.  The attacks are designed to target Microsoft Internet Information Services (IIS) servers, with most of the infections reported in India, Thailand

Fancy Bear can't keep its claws out of Outlook inboxes The UK government is warning that Russia's APT28 (also known as Fancy Bear or Forest Blizzard) has been deploying previously unknown malware to harvest Microsoft email credentials and steal access to compromised accounts.…

Microsoft warns that Chinese threat actors use the Quad7 botnet, compromised of hacked SOHO routers, to steal credentials in password-spray attacks. [...]

The threat actor known as Storm-0501 has targeted government, manufacturing, transportation, and law enforcement sectors in the U.S. to stage ransomware attacks

Microsoft Warns APT28's GooseEgg Tool Enables Credential TheftRussian military intelligence hackers are using an 18 month-old vulnerability in the Windows print spooler utility to deploy a custom tool that elevates privileges and steals credentials. Microsoft says it's seen post-compromise activities against Ukrainian, European and North American governments.

Putin's pals use 'GooseEgg' malware to launch attacks you can defeat with patches or deletion Russian spies are exploiting a years-old Windows print spooler vulnerability and using a custom tool called GooseEgg to elevate privileges and steal credentials across compromised networks, according to Microsoft Threat Intelligence.…

Attackers are now using encrypted RPMSG attachments sent via compromised Microsoft 365 accounts to steal Microsoft credentials in targeted phishing attacks designed to evade detection by email security gateways. [...]

A recent IcedID malware attack enabled the threat actor to compromise the Active Directory domain of an unnamed target less than 24 hours after gaining initial access

In a widespread campaign, threat actors use a compromised Dynamics 365 Customer Voice business account and a link posing as a survey to steal Microsoft 365 credentials.