HAFNIUM-Microsoft-Exchange-0day

酷资源 CheckMyOWA 它是什么？ 我们建立这个网站是为了基于从大规模入侵事件肇事者那里获得的已启用Outlook Web Access（OWA）的受损Exchange服务器列表，协助受害者通知。这包括受影响的IP/域名，以及在这第一波攻击中攻击者是否成功加载了shell。通知如此大量受害者的问题因缺乏法律框架甚至可用的WHOIS数据来确定IP或域名所有者的身份而变得更加复杂，从而无法告知他们其资产上存在的严重问题。这个网站是应对全球性问题的一个不完美的方案。...

HAFNIUM-IOC

HAFNIUM-IOC Hafnium-IOC es un script simple de PowerShell que se ejecuta en servidores Exchange para identificar indicadores de compromiso IOCs de la actividad de Hafnium publicada por Mircosoft el 2021-03-02 https://www.microsoft.com/security/blog/2021/03/02/hafnium-targeting-exchange-servers/. ...

Zirconium

ZIRCONIUM ZIRCONIUM 旨在扫描 Exchange 服务器上的入侵指标（IOC），以查找 HAFNIUM 使用的零日漏洞利用迹象。 ZIRCONIUM 将搜索： CVE-2021-26855 CVE-2021-26958 CVE-2021-26857 CVE-2021-27027065 可疑的 .dmp 文件 在 inetpub 和 Exchange 文件路径中发现的 .aspnet 文件 使用方法 下载最新版本的...

Chinese Silk Typhoon Hacker Extradited to U.S. Over COVID Research Cyberattacks

A Chinese national accused of being a member of the Silk Typhoon hacking group has been extradited to the U.S. from Italy. Xu Zewei, 34, was arrested in July 2025 by Italian authorities for his alleged links to the Chinese state-sponsored threat group and for orchestrating cyber attacks against...

Chinese Hacker Xu Zewei Arrested for Ties to Silk Typhoon Group and U.S. Cyber Attacks

A Chinese national has been arrested in Milan, Italy, for his alleged links to a state-sponsored hacking group known as Silk Typhoon and for carrying out cyber attacks against American organizations and government agencies. The 33-year-old, Xu Zewei , has been charged with nine counts of wire fra...

US Announces Arresting Chinese Hacker Linked to HAFNIUM Group

A Chinese state-sponsored hacker, Xu Zewei, 33, has been arrested for his alleged role in the widespread HAFNIUM cyber attacks and theft of COVID-19 research. Learn about the charges and China's Ministry of State Security involvement...

Detecting and preventing LSASS credential dumping attacks

Obtaining user operating system OS credentials from a targeted device is among threat actors’ primary goals when launching attacks because these credentials serve as a gateway to various objectives they can achieve in their target organization’s environment, such as lateral movement. One techniqu...

WARNING: New Unpatched Microsoft Exchange Zero-Day Under Active Exploitation

Security researchers are warning of previously undisclosed flaws in fully patched Microsoft Exchange servers being exploited by malicious actors in real-world attacks to achieve remote code execution on affected systems. The advisory comes from Vietnamese cybersecurity company GTSC, which...

Defending Against Scheduled Task Attacks in Windows Environments

Scheduling tasks is one of the most popular attack techniques used by threat actors to establish persistence on a victim’s machine. The Qualys Research Team investigated different ways that attackers could use to conceal scheduled tasks. In this blog, we describe three new techniques to hide and...

Millions of Java Apps Remain Vulnerable to Log4Shell

Four months after the discovery of the zero-day Log4Shell critical flaw, millions of Java applications still remain vulnerable to compromise, researchers have found. Rezilion expected that due to the “massive amount of media coverage” the bug unsurprisingly received, the majority of applications...

Microsoft Exposes Evasive Chinese Tarrask Malware Attacking Windows Computers

The Chinese-backed Hafnium hacking group has been linked to a piece of a new malware that's used to maintain persistence on compromised Windows environments. The threat actor is said to have targeted entities in the telecommunication, internet service provider and data services sectors from Augus...

Tarrask malware uses scheduled tasks for defense evasion

As Microsoft continues to track the high-priority state-sponsored threat actor HAFNIUM, new activity has been uncovered that leverages unpatched zero-day vulnerabilities as initial vectors. The Microsoft Detection and Response Team DART in collaboration with the Microsoft Threat Intelligence Cent...

Tarrask malware uses scheduled tasks for defense evasion

As Microsoft continues to track the high-priority state-sponsored threat actor HAFNIUM, new activity has been uncovered that leverages unpatched zero-day vulnerabilities as initial vectors. The Microsoft Detection and Response Team DART in collaboration with the Microsoft Threat Intelligence Cent...

Hackers Begin Exploiting Second Log4j Vulnerability as a Third Flaw Emerges

Web infrastructure company Cloudflare on Wednesday revealed that threat actors are actively attempting to exploit a second bug disclosed in the widely used Log4j logging utility, making it imperative that customers move quickly to install the latest version as a barrage of attacks continues to...

Relentless Log4j Attacks Include State Actors, Possible Worm

Call it a “logjam” of threats: Attackers including nation-state actors have already targeted half of all corporate global networks in security companies’ telemetry using at least 70 distinct malware families — and the fallout from the Log4j vulnerability is just beginning. Researchers manning...

Microsoft Issues Patches for Actively Exploited Excel, Exchange Server 0-Day Bugs

Microsoft has released security updates as part of its monthly Patch Tuesday release cycle to address 55 vulnerabilities across Windows, Azure, Visual Studio, Windows Hyper-V, and Office, including fixes for two actively exploited zero-day flaws in Excel and Exchange Server that could be abused t...

How to Reduce Exchange Server Downtime in Case of a Disaster?

Exchange Server downtime may occur at any point in time due to several reasons, such as malware attack, server crash, database corruption, and hardware or software-related issues/incompatibility. However, downtime can impact productivity and lead to data loss that can have severe implications on...

US, EU, UK, NATO blame china for “reckless” Exchange attacks

Do you remember back when the latest urgent update was a vulnerability in Microsoft Exchange? How is that only four months ago? The trigger for the urgent advice in March was the fact that Microsoft detected multiple zero-day exploits being used to attack on-premises versions of Microsoft Exchang...

US and Global Allies Accuse China of Massive Microsoft Exchange Attack

The U.S. government and its key allies, including the European Union, the U.K., and NATO, formally attributed the massive cyberattack against Microsoft Exchange email servers to state-sponsored hacking crews working affiliated with the People's Republic of China's Ministry of State Security MSS. ...

APT trends report Q1 2021

For four years, the Global Research and Analysis Team GReAT at Kaspersky has been publishing quarterly summaries of advanced persistent threat APT activity. The summaries are based on our threat intelligence research and provide a representative snapshot of what we have published and discussed in...