Attention: We have transitioned to a new AAD or Microsoft Entra ID from the week of May 20, 2024. In case your tenant requires admin consent, please refer to this document located at Overview of user and admin consent - Microsoft Entra ID | Microsoft Learn and grant access to App ID: 6ba09155-cb24-475b-b24f-b4e28fc74365 with graph permissions for Directory.Read.All and User.Read for continued access. While the app may appear unverified, you can confirm its legitimacy by verifying the App ID provided.
This threat stops you from loading Windows and displays a full-screen message, commonly called a "lock screen". If this threat asks you to pay a fee or fine, do not pay it. The message is a fraud.
It tries to scare you into paying a fine to unlock your PC.
Our ransomware FAQ page has more information on this type of threat.
The trend towards increasingly sophisticated malware behavior, highlighted by the use of exploits and other attack vectors, makes older platforms so much more susceptible to ransomware attacks. From June to November 2017, Windows 7 devices were 3.4 times more likely to encounter ransomware compared to Windows 10 devices.
This threat is a malicious program that is unable to spread of its own accord. It may perform a number of actions of an attacker's choice on an affected computer.
Installation
It copies itself to the following locations:
%windir%\sgdfvsdzfgst56j.exe
c:\documents and settings\administrator\application data\xredsyt54esy.exe
The malware modifies the following registry entries to ensure that its copy executes at each Windows start:
Adds value: "xsderty5r" With data: "c:\documents and settings\administrator\application data\xredsyt54esy.exe" To subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Adds value: "Shell" With data: "c:\documents and settings\administrator\application data\xredsyt54esy.exe" To subkey: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon
The malware creates the following files on an affected computer:
c:\documents and settings\administrator\application data\macromedia\flash player\macromedia.com\support\flashplayer\sys\settings.sol
c:\documents and settings\administrator\application data\macromedia\flash player\macromedia.com\support\flashplayer\sys\#freasew.com\settings.sol
c:\documents and settings\administrator\application data\roaming\macromedia\flash player\macromedia.com\support\flashplayer\sys\settings.sol
c:\documents and settings\administrator\application data\roaming\macromedia\flash player\macromedia.com\support\flashplayer\sys\#freasew.com\settings.sol
Payload
Contacts remote host
It may contact a remote host at freasew.com using port 80. Commonly, malware may contact a remote host for the following purposes:
To report a new infection to its author
To receive configuration or other data
To download and execute arbitrary files (including updates or additional malware)
To receive instruction from a remote attacker
To upload data taken from the affected computer
This malware description was produced and published using our automated analysis system's examination of file SHA1 deb7ec0442301dc7796d4f77722ed0ef3233e1d0.
The following system changes may indicate the presence of this malware:
The presence of the following files:
%windir%\sgdfvsdzfgst56j.exe c:\documents and settings\administrator\application data\xredsyt54esy.exe c:\documents and settings\administrator\application data\macromedia\flash player\macromedia.com\support\flashplayer\sys\settings.sol c:\documents and settings\administrator\application data\macromedia\flash player\macromedia.com\support\flashplayer\sys\#freasew.com\settings.sol c:\documents and settings\administrator\application data\roaming\macromedia\flash player\macromedia.com\support\flashplayer\sys\settings.sol c:\documents and settings\administrator\application data\roaming\macromedia\flash player\macromedia.com\support\flashplayer\sys\#freasew.com\settings.sol
The presence of the following registry modifications:
Adds value: "xsderty5r" With data: "c:\documents and settings\administrator\application data\xredsyt54esy.exe" To subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Adds value: "Shell" With data: "c:\documents and settings\administrator\application data\xredsyt54esy.exe" To subkey: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon