File hosting services misused for identity phishing
Since mid-April 2024, Microsoft has observed an increase in defense evasion tactics used in campaigns abusing file hosting services like SharePoint, OneDrive, and Dropbox.
Credential theft
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Simplify endpoint management with Microsoft Intune
Microsoft Intune is a cloud-based unified endpoint management platform that empowers IT to manage, assess, and protect apps and devices.
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Storm-0501: Ransomware attacks expanding to hybrid cloud environments
August 27, 2025 update: Storm-0501 has continuously evolved to achieve sharpened focus on cloud-based TTPs as their primary objective shifted from deploying on-premises endpoint ransomware to using cloud-based ransomware tactics. -
“Dirty stream” attack: Discovering and mitigating a common vulnerability pattern in Android apps
Microsoft discovered a vulnerability pattern in multiple popular Android applications that could enable a malicious application to overwrite files in the vulnerable application’s internal data storage directory, which could lead to arbitrary code execution and token theft, among other impacts. -
Threat actors misuse OAuth applications to automate financially driven attacks
Microsoft Threat Intelligence presents cases of threat actors misusing OAuth applications as automation tools in financially motivated attacks. Secure and verify every identity with Microsoft Entra
Microsoft Entra expands beyond identity and access management with new product categories such as cloud infrastructure entitlement management (CIEM) and decentralized identity.
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Star Blizzard increases sophistication and evasion in ongoing attacks
Microsoft Threat Intelligence continues to track and disrupt malicious activity attributed to a Russian state-sponsored actor we track as Star Blizzard, who has continuously improved their detection evasion capabilities while remaining focused on email credential theft against targets. -
Social engineering attacks lure Indian users to install Android banking trojans
Microsoft has observed ongoing activity from mobile banking trojan campaigns targeting users in India with social media messages and malicious applications designed to impersonate legitimate organizations and steal users’ information for financial fraud scams. -
Octo Tempest crosses boundaries to facilitate extortion, encryption, and destruction
Microsoft has been tracking activity related to the financially motivated threat actor Octo Tempest, whose evolving campaigns represent a growing concern for many organizations across multiple industries. -
Midnight Blizzard conducts targeted social engineering over Microsoft Teams
Microsoft Threat Intelligence has identified highly targeted social engineering attacks using credential theft phishing lures sent as Microsoft Teams chats by the threat actor that Microsoft tracks as Midnight Blizzard (previously tracked as NOBELIUM). Prevent threats with Microsoft Defender
The Microsoft Defender family offers comprehensive threat prevention, detection, and response capabilities for everyone—from individuals looking to protect their family to the world’s largest enterprises.
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The five-day job: A BlackByte ransomware intrusion case study
In a recent investigation by Microsoft Incident Response of a BlackByte 2. -
MERCURY and DEV-1084: Destructive attack on hybrid environment
Microsoft detected a unique operation where threat actors carried out destructive actions in both on-premises and cloud environments. -
Guidance for investigating attacks using CVE-2023-23397
This guide provides steps organizations can take to assess whether users have been targeted or compromised by threat actors exploiting CVE-2023-23397. -
Microsoft Security Experts discuss evolving threats in roundtable chat
Get an in-depth recap of the latest Microsoft Security Experts Roundtable, featuring discussions on trends in global cybercrime, cyber-influence operations, cybersecurity for manufacturing and Internet of Things, and more.
