#PowerShellAttack
CYFIRMA uncovered a multi-stage intrusion using a PowerShell payload hidden as sysupdate.jpeg to deploy a trojanized ConnectWise ScreenConnect for stealthy remote access, exploiting AMSI and UAC bypasses. #PowerShellAttack #FilelessIntrusion
OPERATION SILENTCANVAS : JPEG BASED MULTISTAGE POWERSHELL INTRUSION
CYFIRMA identified a multi-stage intrusion that used a weaponized PowerShell payload disguised as sysupdate.jpeg to deploy a trojanized ConnectWise ScreenConnect instance for covert remote access. The campaign relied on AMSI bypass, on-host .NET compilation, a fileless UAC bypass, and encrypted command-and-control through legitserver.theworkpc[.]com and 45.138.16[.]64. #ConnectWiseScreenConnect #ComputerDefaults.exe #legitserver.theworkpc.com #sysupdate.jpeg #OneDriveServers
www.hendryadrian.com
May 9, 2026 at 11:45 AM
New DeepLoad malware uses ClickFix fake browser errors to deploy a persistent PowerShell loader that injects into LockAppHost.exe, stealing credentials and enabling real-time crypto theft. #DeepLoadMalware #PowerShellAttack #USA
New DeepLoad Malware Dropped in ClickFix Attacks
ReliaQuest has observed an in-the-wild campaign distributing a new malware family called DeepLoad that steals credentials and intercepts browser interactions. The campaign uses the ClickFix technique to trick users into running a persistent PowerShell loader that compiles evasive DLLs, injects into LockAppHost.exe, and facilitates real-time cryptocurrency theft. #DeepLoad #ClickFix...
www.hendryadrian.com
April 1, 2026 at 11:00 PM
Vishing attack leverages Microsoft Teams helpdesk impersonation and screen sharing to execute staged PowerShell, delivering an in-memory PhantomBackdoor via WebSocket. Collaboration tools seen as attack surfaces. #PhantomBackdoor #PowerShellAttack
Cato CTRL™ Threat Research: Vishing and Microsoft Teams Used to Deliver PhantomBackdoor
Cato CTRL researchers observed a vishing-driven delivery that used Microsoft Teams helpdesk impersonation and screen sharing to coax a victim into executing staged PowerShell, which loaded an in-memory payload and established a WebSocket-based backdoor. Defenders are advised to treat collaboration tools as attack surfaces and apply controls such as ticket validation, restricting external Teams access, and PowerShell hardening. #PhantomBackdoor #MicrosoftTeams
www.hendryadrian.com
March 18, 2026 at 9:20 PM