Microsoft Bug Allowed Hackers to Breach Over Two Dozen Organizations via Forged Azure AD Tokens

Microsoft on Friday said a validation error in its source code allowed for Azure Active Directory Azure AD tokens to be forged by a malicious actor known as Storm-0558 using a Microsoft account MSA consumer signing key to breach two dozen organizations. "Storm-0558 acquired an inactive MSA consum...

Analysis of Storm-0558 techniques for unauthorized email access

Executive summary On July 11, 2023, Microsoft published two blogs detailing a malicious campaign by a threat actor tracked as Storm-0558 that targeted customer email that weve detected and mitigated: Microsoft Security Response Center and Microsoft on the Issues. As we continue our investigation...

Cross-Site Scripting (XSS)

wintercms/winter and winter/storm are vulnerable to Cross-Site Scripting XSS attacks. The library does not properly escape user input, which allows an attacker with backend.managebranding permissions to upload SVGs as the application logo and execute malicious javascript on victim's browser...

Storm-0978 actively exploited the unpatched Office zero-day

Threat Level Actor Report For a detailed threat advisory, download the pdf file here Summary Storm-0978 is a Russian cybercriminal group that specializes in executing sophisticated phishing campaigns. Storm-0978 was found to be engaged in a new wave of attacks, leveraging the exploitation of...

U.S. Government Agencies' Emails Compromised in China-Backed Cyber Attack

An unnamed Federal Civilian Executive Branch FCEB agency in the U.S. detected anomalous email activity in mid-June 2023, leading to Microsoft's discovery of a new China-linked espionage campaign targeting two dozen organizations. The details come from a joint cybersecurity advisory released by th...

Zero-day deploys remote code execution vulnerability via Word documents

An unpatched zero-day vulnerability is currently being abused in the wild, targeting those with an interest in Ukraine. Microsoft reports that CVE-2023-36884 is tied to reports of: …a series of remote code execution vulnerabilities impacting Windows and Office products. Microsoft is aware of...

Microsoft Thwarts Chinese Cyber Attack Targeting Western European Governments

Microsoft on Tuesday revealed that it repelled a cyber attack staged by a Chinese nation-state actor targeting two dozen organizations, some of which include government agencies, in a cyber espionage campaign designed to acquire confidential data. The attacks, which commenced on May 15, 2023,...

Microsoft Releases Patches for 132 Vulnerabilities, Including 6 Under Active Attack

Microsoft on Tuesday released updates to address a total of 132 new security flaws spanning its software, including six zero-day flaws that it said have been actively exploited in the wild. Of the 132 vulnerabilities, nine are rated Critical, 122 are rated Important in severity, and one has been...

Apple & Microsoft Patch Tuesday, July 2023 Edition

Microsoft Corp. today released software updates to quash 130 security bugs in its Windows operating systems and related software, including at least five flaws that are already seeing active exploitation. Meanwhile, Apple customers have their own zero-day woes again this month: On Monday, Apple...

Patch Tuesday - July 2023

Microsoft is addressing 130 vulnerabilities this July Patch Tuesday, including five zero-day vulnerabilities, and eight further critical remote code execution RCE vulnerabilities. Overall, it’s safe to say that this is a busier Patch Tuesday than the past couple of months. Note that the total cou...

Storm-0978 attacks reveal financial and espionage motives

Microsoft has identified a phishing campaign conducted by the threat actor tracked as Storm-0978 targeting defense and government entities in Europe and North America. The campaign involved the abuse of CVE-2023-36884, which included a remote code execution vulnerability exploited before disclosu...

Storm-0978 attacks reveal financial and espionage motives

Microsoft has identified a phishing campaign conducted by the threat actor tracked as Storm-0978 targeting defense and government entities in Europe and North America. The campaign involved the abuse of CVE-2023-36884, which included a remote code execution vulnerability exploited before disclosu...

Microsoft mitigates China-based threat actor Storm-0558 targeting of customer email

UPDATE: Microsoft performed a comprehensive technical investigation into the acquisition of the Microsoft account consumer signing key, including how it was used to access enterprise email. Our technical investigation has concluded, and on September 6, 2023, we published our investigation finding...

From MuddyC3 to PhonyC2: Iran's MuddyWater Evolves with a New Cyber Weapon

The Iranian state-sponsored group dubbed MuddyWater has been attributed to a previously unseen command-and-control C2 framework called PhonyC2 that's been put to use by the actor since 2021. Evidence shows that the custom made, actively developed framework has been leveraged in the February 2023...

MULTI#STORM Campaign Targets India and U.S. with Remote Access Trojans

A new phishing campaign codenamed MULTISTORM has set its sights on India and the U.S. by leveraging JavaScript files to deliver remote access trojans on compromised systems. "The attack chain ends with the victim machine infected with multiple unique RAT remote access trojan malware instances, su...

STORM-1359 DDoS triggered outage of Microsoft Services

Threat Level Attack Report For a detailed threat advisory, download the pdf file here Summary The STORM-1359 group a.k.a Anonymous Sudan recently targeted Microsoft services with a DDoS attack, resulting in the disruption of multiple services. To receive real-time threat advisories, please follow...

Microsoft Blames Massive DDoS Attack for Azure, Outlook, and OneDrive Disruptions

Microsoft on Friday attributed a string of service outages aimed at Azure, Outlook, and OneDrive earlier this month to an uncategorized cluster it tracks under the name Storm-1359. "These attacks likely rely on access to multiple virtual private servers VPS in conjunction with rented cloud...

Microsoft Blames Massive DDoS Attack for Azure, Outlook, and OneDrive Disruptions

Microsoft on Friday attributed a string of service outages aimed at Azure, Outlook, and OneDrive earlier this month to an uncategorized cluster it tracks under the name Storm-1359. "These attacks likely rely on access to multiple virtual private servers VPS in conjunction with rented cloud...

Microsoft Response to Layer 7 Distributed Denial of Service (DDoS) Attacks

Summary Beginning in early June 2023, Microsoft identified surges in traffic against some services that temporarily impacted availability. Microsoft promptly opened an investigation and subsequently began tracking ongoing DDoS activity by the threat actor that Microsoft tracks as Storm-1359. Thes...

Microsoft Response to Layer 7 Distributed Denial of Service (DDoS) Attacks

Summary Summary Beginning in early June 2023, Microsoft identified surges in traffic against some services that temporarily impacted availability. Microsoft promptly opened an investigation and subsequently began tracking ongoing DDoS activity by the threat actor that Microsoft tracks as...