remote access Archives

Tech Optimizer

June 5, 2025

Fake DocuSign and Gitcode sites are tricking victims into downloading malware – here’s what you need to know

Researchers at DomainTools Investigations (DTI) have identified counterfeit websites mimicking platforms like DocuSign and Gitcode, designed to lure users into downloading malware, specifically a remote access trojan (RAT). These fraudulent sites use tactics such as fake CAPTCHA prompts to enhance credibility and prompt users to download malicious software disguised as necessary updates. The operation employs a multi-stage downloader PowerShell script, reminiscent of older scams that alarmed users with popups about virus infections. Users are advised to be cautious with unfamiliar websites and verify the authenticity of download prompts.

Winsage

May 31, 2025

New Malware Compromise Microsoft Windows Without PE Header

A new strain of malware has been operating undetected on Windows systems for several weeks, utilizing advanced evasion techniques that corrupt its Portable Executable (PE) headers to avoid detection. Security researchers discovered this malware embedded in the memory of a compromised system during an investigation, using a 33GB memory dump that revealed its presence in a dllhost.exe process with process ID 8200. The malware, classified as a Remote Access Trojan (RAT) by Fortinet, employs batch scripts and PowerShell commands for its attack and has capabilities for screenshot capture, remote server functionality, and system service manipulation. Its command and control infrastructure uses encrypted communications, complicating detection efforts. The malware's distinctive feature is the deliberate corruption of DOS and PE headers, which hinders reverse engineering and complicates the reconstruction of the executable from memory dumps. Researchers had to manually locate the malware’s entry point and resolve complex import tables for it to function in a controlled environment.

Tech Optimizer

May 29, 2025

A Trojan-Downloading Website Is Imitating a Popular Antivirus Website

Hackers are increasingly using sophisticated techniques to entice users into downloading malware, with many individuals still falling victim to basic social engineering tactics. A counterfeit website mimicking the legitimate antivirus program Bitdefender has been created, which could mislead users. This spoofed site hosts a bundled executable named StoreInstaller.exe that contains malware configurations linked to VenomRAT, capable of remote access, credential theft, keylogging, and data exfiltration. The counterfeit site closely resembles the legitimate one, making it difficult for untrained users to distinguish between them. Users are advised to download antivirus software only from reputable sources and to verify the authenticity of the website before proceeding.

Tech Optimizer

May 29, 2025

Antivirus alone won’t protect you: The real danger is social engineering

Social engineering is a manipulation tactic that exploits human trust to obtain sensitive information or access, posing a significant cybersecurity threat. Unlike traditional cyber threats that rely on malware, social engineering targets individuals through deception, often invoking emotions like fear or urgency. Common examples include fraudulent phone calls, phishing emails, and deceptive text messages. Antivirus software primarily protects against malware but is ineffective against social engineering attacks, which do not involve malicious code. The consequences of falling victim to such attacks can include financial losses, identity theft, and compromised networks. Effective defenses against social engineering include skepticism towards unsolicited contact, verifying requests independently, never disclosing sensitive information, using strong passwords, and enabling two-factor authentication. Awareness and education are crucial in combating these threats.

Tech Optimizer

May 28, 2025

Watch out – that antivirus website could be a fake, and infecting your PC with malware

Researchers have discovered a fraudulent website, "bitdefender-download[.]com," posing as Bitdefender antivirus, which is used to distribute the VenomRAT Remote Access Trojan. The site, hosted on an Amazon S3 bucket, tricks users into downloading harmful software through an executable file named "StoreInstaller.exe," which is linked to VenomRAT and contains code from post-exploitation frameworks SilentTrinity and StormKitty stealer. VenomRAT allows cybercriminals to gain unauthorized control over Windows systems, steal sensitive information, log keystrokes, access webcams, and execute commands remotely. The primary goal of this campaign is to steal cryptocurrency by compromising credentials and crypto wallets. The investigation also found connections to other fraudulent operations impersonating banks and IT services, including the Armenian IDBank and the Royal Bank of Canada.

Tech Optimizer

May 28, 2025

Hackers Mimic Popular Antivirus Site to Deliver VenomRAT & Steal Finance Data

Cybercriminals are executing a sophisticated malware campaign through a counterfeit Bitdefender antivirus website, specifically the domain “bitdefender-download[.]co,” which mimics the legitimate site. This fraudulent site distributes three types of malware: VenomRAT, StormKitty, and SilentTrinity, aimed at stealing financial data and maintaining persistent access to victims’ computers. When users click the “Download For Windows” button, they inadvertently download a ZIP file containing these malicious programs. VenomRAT acts as a remote access tool, allowing attackers to steal files, cryptocurrency wallets, and browser data, including credit card information. StormKitty quickly harvests sensitive credentials, while SilentTrinity provides stealthy long-term access for further exploitation. The fake Bitdefender site is linked to other malicious domains impersonating banks, indicating a coordinated phishing operation. The attackers utilize the same command and control infrastructure, with the IP address 67.217.228.160:4449 identified as a connection point. Bitdefender is working to take down the fraudulent site, and Google Chrome has begun flagging the link as malicious. Security experts recommend verifying website authenticity and downloading software only from official sources.

Winsage

May 28, 2025

The Windows File Explorer is still so bad when it comes to networked drives

File Explorer in Windows 11 has usability issues, particularly with sluggish search functionality and problems accessing networked drives. Users often experience drives disappearing after reboot, inaccessibility to files, and freezing of File Explorer, with error codes like c0000375 indicating deeper issues. The networked drive feature relies on outdated technology, as Microsoft has deprecated older protocols like SMBv1, complicating file sharing. Users can mitigate freezing by restarting File Explorer and ensuring network settings are correctly configured, such as setting Wi-Fi to private and enabling file sharing options. Excessive pinned items in Quick Access can cause crashes, and clearing the cache may resolve these issues. Alternatives to File Explorer, like XYplorer and File Pilot, can provide better access to networked drives. Overall, the challenges stem from outdated technology and the corruption of the Quick Access cache, with third-party solutions available for relief.

Winsage

May 25, 2025

Windows Passwords Are Under Attack — Do These 7 Things Now

Microsoft Windows is a target for cybercriminals, particularly regarding password theft. Trend Micro has reported an increase in fraudulent Captcha attacks that trick users into executing malicious commands through the Windows Run dialog, leading to data theft and malware infections. These attacks utilize PowerShell and can deploy various malware types, including Lumma Stealer and AsyncRAT. Despite efforts to disrupt the Lumma Stealer network, threats persist, exploiting legitimate platforms. Microsoft recommends users adopt safer online practices and outlines seven mitigations for organizations: disable access to the Run dialog, apply least privilege, restrict access to unapproved tools, monitor unusual behavior, harden browser configurations, enable memory protection, and invest in user education.

AppWizard

May 20, 2025

Preventing App-Based Threats on Android Devices

By 2025, the Android platform faces increasingly sophisticated app-based threats, including ransomware, fake apps, social engineering, and remote access attacks. Cybercriminals exploit Android's open architecture, prompting the need for advanced security measures. Android's security architecture includes: 1. Google Play Protect: Scans applications before installation using real-time machine learning to detect emerging malware and deceptive tactics. 2. Application Sandboxing: Isolates apps to prevent data access between them, utilizing Linux permissions and SELinux policies. 3. App Signing and Code Integrity: Requires cryptographic signatures for apps, complicating the introduction of rogue certificates and runtime modifications. Advanced protections include Runtime Application Self-Protection (RASP) for high-security apps, which monitors behavior in real time, and secure coding practices that encourage regular code reviews, strong authentication, and data encryption. User vigilance is crucial, emphasizing responsible downloading, limiting permissions, keeping software updated, enabling two-factor authentication, and being cautious with public Wi-Fi. Google continuously updates security measures, ensuring older devices receive new protections, while collaboration with the security community aids in identifying and countering emerging threats.

Winsage

May 19, 2025

Windows Remote Desktop Gateway UAF Vulnerability Allows Remote Code Execution

A critical vulnerability, designated as CVE-2025-21297, has been identified in Microsoft’s Remote Desktop Gateway (RD Gateway) due to a use-after-free (UAF) bug linked to concurrent socket connections during the service's initialization. This flaw, located in the aaedge.dll library within the CTsgMsgServer::GetCTsgMsgServerInstance function, allows multiple threads to overwrite a global pointer, leading to potential arbitrary code execution. The vulnerability affects multiple versions of Windows Server, including 2016, 2019, 2022, and 2025. Microsoft released security updates in May 2025 to address the issue, implementing mutex-based synchronization. The updates are KB5050011 for Windows Server 2016, KB5050008 for Windows Server 2019, KB5049983 for Windows Server 2022, and KB5050009 for Windows Server 2025. Security experts recommend applying these patches promptly and monitoring RD Gateway logs for unusual activity.