Worm:Win32/Rotrumas.A

Posted: December 5, 2012

Worm:Win32/Rotrumas.A Description

Worm:Win32/Rotrumas.A is a worm that circulates via removable drives. Worm:Win32/Rotrumas.A may also replace detected picture files (JPG and JPEG) with its own picture and may remove contents of document files (DOC and XLS). Once installed on the affected PC, Worm:Win32/Rotrumas.A adds potentially malicious files and makes registry modifications. Worm:Win32/Rotrumas.A creates the certain registry entries so that its copy can load automatically every time you start Windows Worm:Win32/Rotrumas.A searches the affected PC for removable drives and, if found, adds a copy of itself in the root folder of the drive. Worm:Win32/Rotrumas.A also creates a malicious file to automatically launch its copy when the drive is accessed and if 'Autorun' is enabled. Worm:Win32/Rotrumas.A changes file and folder display settings. Worm:Win32/Rotrumas.A also changes certain settings in the way that files and folders are displayed in Windows Explorer. Worm:Win32/Rotrumas.A removes the Folder Options menu item from the Tools menu and displays hidden files and folders. Worm:Win32/Rotrumas.A steals information including email addresses from the corrupted PC.

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Technical Details

Registry Modifications


The following newly produced Registry Values are:

HKEY..\..\{Value}HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "?ht?msys19.exe" = "[system folder]\ctfmon.exe"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "lsass" = "[system folder]\deter177\lsass.exe"HKEY..\..\..\..{Subkeys}HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced "HideFileExt" "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced "Hidden" "0"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon "Shell" = "explorer.exe [system folder]\?ht?msys19.exe"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run "lsass" = "[system folder]\deter177\lsass.exe"HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\explorer "NoFolderOptions" "1"
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