Threats Tagged 'connectwise screenconnect'

A sophisticated phishing campaign impersonates DocuSign's branding to compromise victims through malicious JavaScript embedded in fraudulent webpages. The attack leverages social engineering to trick users into downloading MSI installers disguised as legitimate DocuSign updates or documents. These payloads establish remote access through legitimate Remote Monitoring and Management tools from Atera Network Ltd and ConnectWise/ScreenConnect. Investigation revealed extensive attacker infrastructure spanning hundreds of domains, with tracking mechanisms via Telegram bots collecting detailed victim telemetry including IP addresses, geolocation, ISP information, and user-agent strings. The campaign targets both Windows and macOS systems, utilizing deployment kits across multiple infrastructures with similar URL patterns and JavaScript mechanisms.

A sophisticated multi-stage intrusion campaign was identified leveraging a weaponized PowerShell payload disguised as a JPEG image file (sysupdate.jpeg) to deploy a trojanized ConnectWise ScreenConnect instance for covert remote access. The attack likely originates through social engineering techniques including phishing emails or malicious attachments. Upon execution, the malware establishes a staging environment, retrieves additional payloads from attacker-controlled infrastructure, and dynamically compiles a custom launcher using Microsoft's legitimate .NET compiler (csc.exe) to evade detection. The intrusion abuses ComputerDefaults.exe and a malicious ms-settings registry hijack to perform a fileless UAC bypass and obtain elevated privileges. Once elevated, the malware deploys a persistent service masquerading as OneDriveServers and launches a modified ScreenConnect framework capable of credential interception, remote command execution, surveillance operations, SYSTEM-level execution, encrypted command...