Malicious files Archives

Tech Optimizer

May 3, 2025

Use Protection: 6 Tips to Watch Porn Online Safely

Seventeen U.S. states have enacted age verification laws that effectively prohibit adult websites from operating within their jurisdictions. The use of Incognito Mode can help hide browsing history, but it is not completely secure as data may still be retained by Google. Data theft is a risk when engaging with adult content, especially if personal information is shared on pornographic sites. Using a VPN can enhance anonymity, but it does not protect against voluntarily shared information. Privacy services like IronVest can help create disposable email addresses and phone numbers. Ads on adult websites can contain malware, making antivirus software important for protection. Trusted pornographic sites typically prioritize user privacy and security, so caution is advised when choosing platforms.

Winsage

April 19, 2025

Windows vulnerability with NTLM hash abuse exploited for phishing

A vulnerability in Windows, identified as CVE-2025-24054, is being exploited in phishing campaigns targeting government and private organizations. Initially considered low-risk, it was addressed in Microsoft's March 2025 Patch Tuesday updates. Following the release of these patches, Check Point observed a rise in exploitation attempts, particularly linked to the Russian group APT28. Attackers sent phishing emails with Dropbox links containing .library-ms files, which, when accessed, connected to an external SMB server controlled by the attackers, allowing interception of NTLM hashes. A subsequent wave of attacks involved .library-ms files sent as direct attachments, requiring minimal user interaction to exploit the vulnerability. The malicious ZIP archive also contained files exploiting older NTLM vulnerabilities. Check Point identified the attackers' SMB servers with specific IP addresses. Despite being classified as medium-severity, the vulnerability's potential impact is significant, prompting organizations to apply the March 2025 updates and consider disabling NTLM authentication if not essential.

Winsage

April 17, 2025

Windows NTLM hash leak flaw exploited in phishing attacks on governments

A vulnerability in Windows, identified as CVE-2025-24054, is being actively exploited in phishing campaigns targeting government and private sectors. Initially addressed in Microsoft's March 2025 Patch Tuesday, it was not considered actively exploited at that time. Researchers from Check Point reported increased exploitation activities shortly after the patches were released, particularly between March 20 and 25, 2025. Some attacks were linked to the Russian state-sponsored group APT28, but definitive attribution is lacking. The vulnerability allows attackers to capture NTLM hashes through phishing emails containing manipulated .library-ms files that trigger the flaw when interacted with. Check Point noted that subsequent attacks involved .library-ms files sent directly, requiring minimal user interaction to exploit. The malicious files also included additional components that exploit older vulnerabilities related to NTLM hash leaks. The attacker-controlled SMB servers were traced to specific IP addresses. Although rated as medium severity, the potential for authentication bypass and privilege escalation makes it a significant concern, prompting recommendations for organizations to install updates and disable NTLM authentication if not necessary.

Winsage

April 17, 2025

Hackers Exploiting NTLM Spoofing Vulnerability in Wild to Compromise Systems

Cybercriminals are exploiting a vulnerability in Windows systems known as CVE-2025-24054, which involves NTLM hash disclosure through spoofing techniques. This flaw allows attackers to leak NTLM hashes, leading to privilege escalation and lateral movement within networks. It is triggered when a user extracts a ZIP archive containing a malicious .library-ms file, causing Windows Explorer to initiate SMB authentication requests that expose NTLMv2-SSP hashes. Exploitation of this vulnerability began shortly after a security patch was released on March 11, 2025, with campaigns targeting government and private institutions in Poland and Romania. These campaigns utilized spear-phishing emails containing malicious ZIP archives, which, when interacted with, leaked NTLM hashes. The malicious files included various types designed to initiate SMB connections to attacker-controlled servers, allowing for pass-the-hash attacks and privilege escalation. The stolen hashes were sent to servers in several countries, indicating potential links to state-sponsored groups. One campaign involved Dropbox links that exploited the vulnerability upon user interaction. Microsoft has recommended immediate patching, enhancing network defenses, user education, network segmentation, and regular security audits to mitigate risks associated with this vulnerability.

Winsage

April 7, 2025

EncryptHub’s dual life: Cybercriminal vs Windows bug-bounty researcher

EncryptHub has been linked to breaches affecting 618 organizations and is associated with the disclosure of two Windows zero-day vulnerabilities, CVE-2025-24061 and CVE-2025-24071, to Microsoft. The vulnerabilities were addressed during the March 2025 Patch Tuesday updates, and the reporter was acknowledged as 'SkorikARI with SkorikARI.' Investigations revealed a connection between EncryptHub and SkorikARI, following an incident where EncryptHub exposed their credentials. SkorikARI's accounts were used to report the vulnerabilities, contributing to Windows security. Evidence linking SkorikARI to EncryptHub includes password files exfiltrated from EncryptHub's system and a GitHub account associated with SkorikARI. EncryptHub has previously attempted to market zero-day vulnerabilities on underground forums and is believed to have affiliations with ransomware groups. The threat actor has executed social engineering campaigns, phishing attacks, and developed a custom infostealer known as Fickle Stealer. They created fictitious social media profiles and websites, such as a fake project management application called GartoriSpace, which installed malicious files on unsuspecting users. EncryptHub has also been implicated in exploiting a Microsoft Management Console vulnerability, CVE-2025-26633.

Winsage

March 26, 2025

New Windows 0-Day Vulnerability Let Remote Attackers Steal NTLM Credentials

A critical vulnerability affecting various Windows operating systems, including Windows 7, Server 2008 R2, Windows 11 v24H2, and Server 2025, allows attackers to capture NTLM authentication credentials through interactions with malicious files in Windows Explorer. Exploitation can occur when users open shared folders, insert USB drives with malicious files, or view downloaded files. The vulnerability is similar to a previously patched flaw (CVE-2025-21377) but has not been fully documented. Security researchers have developed micropatches available for free until Microsoft releases a permanent fix. These micropatches support a wide range of Windows versions, including legacy and currently supported systems. The micropatches have been automatically distributed to affected systems with the 0patch Agent installed.

Winsage

March 26, 2025

New Windows 0-Day Vulnerability Let Remote Attackers Steal NTLM Credentials

A critical vulnerability affects all Windows operating systems from Windows 7 to Windows 11 v24H2 and Server 2025, allowing attackers to capture NTLM authentication credentials through malicious files viewed in Windows Explorer. Exploitation can occur when users open shared folders, insert USB drives with malicious files, or view previously downloaded files. The vulnerability is similar to a previously patched flaw (CVE-2025-21377) but has not been publicly documented. Security researchers have developed micropatches through 0patch to temporarily mitigate the issue, which will be available at no cost until Microsoft releases a permanent solution. The micropatches support various Windows versions, including legacy and currently supported systems, and can be automatically deployed without requiring system reboots.

Winsage

March 26, 2025

New Windows Zero-Day Vulnerability Exposes NTLM Credentials – Unofficial Patch Now Available

A zero-day vulnerability has been identified in the Windows operating system, affecting versions from Windows 7 and Server 2008 R2 to Windows 11 v24H2 and Server 2025. This vulnerability allows attackers to obtain NTLM credentials by tricking users into opening malicious files in Windows Explorer. Microsoft has been notified, and while there is no official CVE number yet, an unofficial patch is available through 0patch. The flaw is similar to previous vulnerabilities related to NTLM hash disclosures but has not been widely discussed. To exploit it, attackers need network access to the victim's system or a way to relay stolen credentials. 0patch has created micropatches for all affected Windows versions, which are available for free until Microsoft provides an official fix. This is the fourth zero-day vulnerability reported by 0patch recently, with previous vulnerabilities including those in Windows Theme files and the Mark of the Web issue on Server 2012. 0patch also offers patches for NTLM-related vulnerabilities that Microsoft has classified as “wont fix.” Users can create a free account with 0patch for automatic protection against these vulnerabilities. Micropatches are available for various Windows versions, including both legacy and currently supported systems, and will remain free until an official Microsoft fix is released.

Winsage

March 25, 2025

New Windows zero-day leaks NTLM hashes, gets unofficial patch

A newly discovered zero-day vulnerability in Windows allows remote attackers to steal NTLM credentials by tricking users into opening malicious files in Windows Explorer. This flaw affects various Windows versions, including Windows 7 through Windows 11 and Server 2008 R2 to Server 2025. The vulnerability, identified by ACROS Security researchers, has not been assigned a CVE-ID and enables attackers to obtain NTLM credentials through methods like accessing shared folders or USB drives. While the exploit's criticality is moderate and depends on specific conditions, it has been linked to actual attacks. ACROS Security has released free micropatches for all affected Windows versions via its 0Patch service until Microsoft provides an official fix. Users can install the micropatch easily by creating an account and activating the 0patch agent, which applies the patch automatically.

Tech Optimizer

March 25, 2025

What the Tech? Avoiding malware threats

The ABC 6 News Team reports on the Infostealer malware, which has compromised over 2 billion credentials by using fake websites to trick users into providing sensitive information. Infostealer targets searches for free software, cracked software, game cheats, and activation tools, employing tactics such as search engine ads, SEO manipulation, social media promotions, and typosquatting to lure victims. Once installed, Infostealer can steal passwords, credit card information, cryptocurrency wallet data, and personal information. To mitigate risks, users are advised to download software from reputable sources, be cautious of offers that seem too good to be true, install robust antivirus software, enable ad blockers, verify URLs, use multi-factor authentication, keep software updated, and stay informed about cybersecurity threats. Additionally, users can check if their email addresses or passwords have been involved in data breaches at www.haveibeenpwned.com.