Windows CLFS and five exploits used by ransomware operators

In April 2023, we published a blog post about a zero-day exploit we discovered in ransomware attacks that was patched as CVE-2023-28252 after we promptly reported it to Microsoft. In that blog post, we mentioned that the zero-day exploit we discovered was very similar to other Microsoft Windows...

Cuba Ransomware Extorted Over $60 Million in Ransom Fees from More than 100 Entities

The threat actors behind Cuba aka COLDDRAW ransomware have received more than $60 million in ransom payments and compromised over 100 entities across the world as of August 2022. In a new advisory shared by the U.S. Cybersecurity and Infrastructure Security Agency CISA and the Federal Bureau of...

Vice Society Hackers Are Behind Several Ransomware Attacks Against Education Sector

A cybercrime group known as Vice Society has been linked to multiple ransomware strains in its malicious campaigns aimed at the education, government, and retail sectors. The Microsoft Security Threat Intelligence team, which is tracking the threat cluster under the moniker DEV-0832, said the gro...

Wormable Flaw, 0days Lead Sept. 2022 Patch Tuesday

This months Patch Tuesday offers a little something for everyone, including security updates for a zero-day flaw in Microsoft Windows that is under active attack, and another Windows weakness experts say could be used to power a fast-spreading computer worm. Also, Apple has also quashed a pair of...

Zero-day vulnerability leveraged to deploy Cuba Ransomware

Threat Level Attack Report For a detailed advisory, download the pdf file here Summary The threat actors behind the Cuba ransomware have stepped up their game by using a new Remote Access Trojan called ROMCOM and weaponizing a local privilege escalation vulnerabilityCVE-2022-24521. A wide range o...

CVE-2022-24521 Windows Common Log File System Driver Elevation of Privilege Vulnerability

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CVE-2022-24521

CVE-2022-24521 is a Windows Windows Common Log File System Driver Privilege Escalation vulnerability. The CVE entry reports an elevation-of-privilege flaw in the CLFS driver; CVSS scores shown include a 2.0/2.0 base (MEDIUM) on NVD and a 3.1-based HIGH score from Microsoft, both indicating local ...

CVE-2022-24521

Windows Common Log File System Driver Elevation of Privilege Vulnerability Recent assessments: cbeek-r7 at March 21, 2025 12:29pm UTC reported: RansomHub affiliate observed in abusing this vulnerability including 3 files that were weaponizing this vulnerability:...

Microsoft Patch Tuesday April 2022 addressed two zero-day vulnerabilities

THREAT LEVEL: Red. For a detailed advisory, download the pdf file here Microsoft addressed 128 vulnerabilities in there April patch Tuesday update. Two of them have been categorized as zero-day vulnerabilities. One of the two zero-days is exploited-in-the-wild as well. The vulnerability,...

Microsoft Patch Tuesday, April 2022 Edition

Microsoft on Tuesday released updates to fix roughly 120 security vulnerabilities in its Windows operating systems and other software. Two of the flaws have been publicly detailed prior to this week, and one is already seeing active exploitation, according to a report from the U.S. National...

CVE-2022-24521

creationtimestamp| type| source ---|---|--- 2022-04-13 04:00:00+00:00| seen| https://www.govcert.gov.hk/en/alertsdetail.php?id=784 2022-04-13 08:18:48+00:00| seen| https://t.me/itsecnews/474 2022-04-13 16:05:03+00:00| exploited| https://t.me/truesecator/2844 2022-04-14 13:46:52+00:00| exploited|...

Microsoft Issues Patches for 2 Windows Zero-Days and 126 Other Vulnerabilities

Microsoft's Patch Tuesday updates for the month of April have addressed a total of 128 security vulnerabilities spanning across its software product portfolio, including Windows, Defender, Office, Exchange Server, Visual Studio, and Print Spooler, among others. 10 of the 128 bugs fixed are rated...

VulnCheck KEV: CVE-2022-24521

Microsoft Windows Common Log File System CLFS Driver contains an unspecified vulnerability that allows for privilege escalation...

KB5012666: Windows Server 2012 Security Update (April 2022)

The remote Windows host is missing security update 5012666 or cumulative update 5012650. It is, therefore, affected by multiple vulnerabilities: - A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands...

KB5012653: Windows 10 version 1507 LTS Security Update (April 2022)

The remote Windows host is missing security update 5012653. It is, therefore, affected by multiple vulnerabilities: - An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges. CVE-2022-26798, CVE-2022-26801, CVE-2022-26786, CVE-2022-24549, CVE-2022-26794,...

KB5012670: Windows 8.1 and Windows Server 2012 R2 Security Update (April 2022)

The remote Windows host is missing security update 5012639 or cumulative update 5012670. It is, therefore, affected by multiple vulnerabilities: - An elevation of privilege vulnerability. An attacker can exploit this to gain elevated privileges. CVE-2022-24474, CVE-2022-24481, CVE-2022-24494,...

KB5012632: Windows Server 2008 Security Update (April 2022)

The remote Windows host is missing security update 5012632 or cumulative update 5012658. It is, therefore, affected by multiple vulnerabilities: - A remote code execution vulnerability. An attacker can exploit this to bypass authentication and execute unauthorized arbitrary commands...