Tag: windows

This analysis delves into a Windows rootkit loader for the FK_Undead malware family, known for intercepting user network traffic through proxy manipulation. The loader, signed with a valid Microsoft certificate, installs itself as a system service and employs various evasion techniques. It download…

A sophisticated scam targeting Web3 professionals has been identified, involving the Realst crypto stealer malware with variants for both macOS and Windows. The threat actors have created fake companies using AI-generated content to appear legitimate, cycling through various names like Meetio, Clus…

Helldown is a new and highly active ransomware group that has claimed 31 victims in three months. It employs custom ransomware for Windows and Linux systems, engages in double extortion, and exploits vulnerabilities in Zyxel firewalls for initial access. The group exfiltrates large volumes of data,…

Threat actors are using fake AI image and video generators to distribute Lumma Stealer and AMOS information-stealing malware on Windows and macOS. These malicious programs masquerade as an AI application called EditProAI, targeting users through search results and social media advertisements. The m…

A newly discovered vulnerability in Windows NT LAN Manager (NTLM) has been exploited by suspected Russian hackers in cyber attacks against Ukraine. The flaw, identified as CVE-2024-43451, allows attackers to steal NTLMv2 hashes through minimal user interaction with malicious files. The exploit chai…

ThreatLabz has developed SmokeBuster, a tool to detect, analyze, and remove SmokeLoader malware from infected systems. Despite Operation Endgame's disruption in May 2024, SmokeLoader continues to be used by threat groups. SmokeBuster supports various SmokeLoader versions and Windows systems, offeri…

Russian hackers, identified as UNC5812, are targeting the Ukrainian military through a sophisticated cyber operation. The attackers use a deceptive Telegram channel and website posing as a civil defense service to distribute malware for both Windows and Android devices. The Windows attack deploys P…

Akira ransomware has established itself as a prominent threat, constantly evolving its tactics. Initially employing double-extortion, it shifted focus to data exfiltration in early 2024. The group developed a Rust variant of their ESXi encryptor, moving away from C++. Recently, Akira has returned t…

A new ransomware called Fog has been identified, affecting education and recreation centers in the United States. The threat actors gain access through compromised VPN credentials, disable Windows Defender, and deploy the ransomware. Fog is a 32-bit EXE file compiled using Microsoft Visual C/C++. I…

The Beast Ransomware group, active since 2022, offers a Ransomware-as-a-Service (RaaS) platform with constant updates. It supports Windows, Linux, and ESXi systems, providing affiliates with customizable binary options. Beast employs advanced encryption methods, including Elliptic-curve and ChaCha2…

Threat actors are using fake Google Meet web pages as part of the ClickFix campaign to deliver infostealers targeting Windows and macOS systems. The attackers display fake error messages in web browsers, tricking users into executing malicious PowerShell code. The campaign has expanded to impersona…

A security flaw in Windows 7 and Server 2008 R2 allows kernel shellcode to be hidden in the registry and executed during boot, despite patches. This vulnerability was exploited in a 2018 targeted attack. The SAS CTF challenge involved analyzing this technique, which uses buffer overflows in DirectX…

CVE-2024-38178 is a type confusion vulnerability in JScript9.dll, patched by Microsoft in August 2024. It allows bypassing the CVE-2022-41128 patch through incorrect JIT engine optimizations. APT37, a North Korean threat group, exploited this vulnerability in June 2024 against South Korean targets.…

A newly identified variant of FASTCash "payment switch" malware specifically targets the Linux operating system, as well as Microsoft Windows, according to CISA and the Department of Homeland Security (DHS).

The IMEEX framework is a newly discovered, custom-built malware targeting Windows systems. Delivered as a 64-bit DLL, it offers extensive control over compromised machines, featuring execution of additional modules, file manipulation, process management, registry modification, and remote command ex…

Lynx ransomware, discovered in July 2024, is a successor to INC ransomware targeting organizations in retail, real estate, architecture, and financial services in the U.S. and UK. It shares significant source code with INC and operates as a ransomware-as-a-service model. Lynx employs double extorti…

The Underground ransomware, first observed in July 2023, targets Windows machines by encrypting files and demanding ransom. Attributed to the Russia-based RomCom group, it exploits CVE-2023-36884 and other common infection vectors. The ransomware deletes shadow copies, modifies RemoteDesktop settin…

ESET researchers discovered two code execution vulnerabilities in WPS Office for Windows. CVE-2024-7262 was exploited by APT-C-60, a South Korea-aligned cyberespionage group, to target East Asian countries. The vulnerability allowed arbitrary code execution via a malicious hyperlink in a spreadshee…

Cybersecurity specialists have observed an escalation in attacks employing the AppDomainManager Injection technique, which exploits the .NET Framework's version redirection feature to manipulate legitimate EXE files and load malicious DLLs. These attacks commonly begin with a ZIP file containing a …

This report details a malicious campaign exploiting the CVE-2024-21412 vulnerability in Microsoft Windows SmartScreen to bypass security warnings and deliver malware. Attackers employ crafted links, LNK files, and HTA scripts to download decoy PDFs and shell code injectors, ultimately injecting ste…

This blog post examines MoonWalk, a new backdoor employed by APT41, a China-based threat actor known for campaigns in Southeast Asia. MoonWalk utilizes numerous evasion techniques, including DLL hollowing, call stack spoofing, and the abuse of Windows Fibers to evade security solutions. It also lev…

Check Point Research discovered threat actors leveraging novel techniques to execute malicious code on Windows systems by exploiting Internet Explorer's vulnerabilities. The attackers utilized specially crafted .url files that, when opened, would launch IE and visit attacker-controlled URLs. Additi…

Amid the rise of bootkits at the time, a dropper was captured in-the-wild and posted on a malware tracker. The malware was called "Guntior", named after the device object its authors had chosen for it (\Device\Guntior). The name also appears in AV detections.

This concise report provides insights into the evolving ransomware landscape, covering the KageNoHitobito and DoNex variants. It analyzes their infection vectors, victimology, attack methods, and associated indicators of compromise (IoCs). The report also highlights Fortinet's protections against t…