Threats tagged 'remcos'

This report details a multi-stage malware campaign delivering the REMCOS backdoor via a malicious Windows LNK shortcut file. The attack begins with social engineering, leveraging PowerShell for initial execution and deploys a persistent backdoor capable of full system compromise. The infection chain involves file download, Base64 decoding, and execution of a malicious PIF file masquerading as a Chrome-related program. The LNK file contains a PowerShell command that downloads and executes a payload, which is then decoded and run as CHROME.PIF. This file is identified as the REMCOS backdoor, capable of various malicious activities including keylogging, screen capture, and remote access. The attack utilizes multiple stages to evade detection and establish persistence on the victim's system.

Malware#base64 encoding#multi-stage attackRomania+6

A wide-ranging phishing campaign has been identified that enables threat actors to bypass traditional security controls and delay detection. The campaign, tracked since 2024, has facilitated remote surveillance, credential theft, lateral movement, data exfiltration, and ransomware across numerous organizations. The likely new or rebranded cybercriminal group behind this campaign uses legitimate services like TryCloudflare to host and deliver highly evasive malware such as AsyncRAT and other Remote Access Trojans. This malware allows threat actors to remotely control infected networks throughout the full attack lifecycle. The campaign targets organizations globally across multiple sectors without industry preference, using widely available malware and difficult-to-detect techniques involving Python scripts, obfuscated batch scripts, trusted cloud services, and dynamic infrastructure.

Malware#asyncrat#xwormGermany+9

Censys researchers uncovered a spear‑phishing campaign where threat actors leveraged a cluster of 16 open directories hosting heavily obfuscated Visual Basic Script (VBS) files. The study analyzes how attackers set up these public-accessible directories to store malicious scripts, the obfuscation techniques employed, and the infrastructure's lifecycle.

Malware#opendir#remcosGermany+6

This investigation uncovered a large-scale campaign involving backdoored GitHub repositories targeting game cheaters and inexperienced cybercriminals. The threat actor, possibly linked to a Distribution-as-a-Service operation, uses multiple types of backdoors and a convoluted infection chain leading to RATs and infostealers. The campaign involves automated commits, obfuscation techniques, and complex payloads. Researchers found over 100 malicious repositories with distinct contributor roles, suggesting an automated framework. The eventual payload includes AsyncRAT, Remcos, and Lumma Stealer. The threat actor uses Telegram for notifications and various paste sites for hosting malicious code. This case highlights the complexity of modern cyber threats and the importance of cautious approaches to open-source repositories.

Campaign#infostealer#githubGermany+6