Trojan.Ransomcrypt.D
Posted: July 15, 2013
Threat Metric
The following fields listed on the Threat Meter containing a specific value, are explained in detail below:
Threat Level: The threat level scale goes from 1 to 10 where 10 is the highest level of severity and 1 is the lowest level of severity. Each specific level is relative to the threat's consistent assessed behaviors collected from SpyHunter's risk assessment model.
Detection Count: The collective number of confirmed and suspected cases of a particular malware threat. The detection count is calculated from infected PCs retrieved from diagnostic and scan log reports generated by SpyHunter.
Volume Count: Similar to the detection count, the Volume Count is specifically based on the number of confirmed and suspected threats infecting systems on a daily basis. High volume counts usually represent a popular threat but may or may not have infected a large number of systems. High detection count threats could lay dormant and have a low volume count. Criteria for Volume Count is relative to a daily detection count.
Trend Path: The Trend Path, utilizing an up arrow, down arrow or equal symbol, represents the level of recent movement of a particular threat. Up arrows represent an increase, down arrows represent a decline and the equal symbol represent no change to a threat's recent movement.
% Impact (Last 7 Days): This demonstrates a 7-day period change in the frequency of a malware threat infecting PCs. The percentage impact correlates directly to the current Trend Path to determine a rise or decline in the percentage.
| Threat Level: | 9/10 |
|---|---|
| Infected PCs: | 5 |
| First Seen: | July 15, 2013 |
|---|---|
| Last Seen: | March 15, 2022 |
| OS(es) Affected: | Windows |
Trojan.Ransomcrypt.D is a Trojan that encrypts certain documents on the infected computer and locks the desktop. When Trojan.Ransomcrypt.D is executed, it creates a copy of itself to the certain locations. Trojan.Ransomcrypt.D creates the potentially malicious files. Trojan.Ransomcrypt.D then creates the specific file so that it can run automatically every time Windows is started. Trojan.Ransomcrypt.D then creates and modifies the registry entries so that it can run automatically every time Windows is started. Trojan.Ransomcrypt.D creates and modifies the registry entries in order to lower security settings. Trojan.Ransomcrypt.D then creates more registry entries. Trojan.Ransomcrypt.D may lock the affected computer and display an image/alert entitled 'DIRTY ALERT'. Trojan.Ransomcrypt.D will ask the victim to pay a ransom to unlock the affected computer using one of the payment methods Paysafecard, Ukash or Moneypak. Trojan.Ransomcrypt.D may also encrypt files on the corrupted PC. In order to conceal the infection, Trojan.Ransomcrypt.D may stop the processes used to trace system behavior. Trojan.Ransomcrypt.D may then connect to a number of web addresses.
Technical Details
File System Modifications
Tutorials: If you wish to learn how to remove malware components manually, you can read the tutorials on how to find malware, kill unwanted processes, remove malicious DLLs and delete other harmful files. Always be sure to back up your PC before making any changes.
The following files were created in the system:%ProgramFiles%\Adobe\[RANDOM CHARACTERS].exe
File name: %ProgramFiles%\Adobe\[RANDOM CHARACTERS].exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%ProgramFiles%\Dirty\DirtyDecrypt.exe
File name: %ProgramFiles%\Dirty\DirtyDecrypt.exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%Temp%\[RANDOM CHARACTERS].exe
File name: %Temp%\[RANDOM CHARACTERS].exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Application Data\Dirty\DirtyDecrypt.exe
File name: %UserProfile%\Application Data\Dirty\DirtyDecrypt.exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Local Settings\Application Data\Identities\[RANDOM CHARACTERS].exe
File name: %UserProfile%\Local Settings\Application Data\Identities\[RANDOM CHARACTERS].exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Application Data\Dirty\alertwall.jpg
File name: %UserProfile%\Application Data\Dirty\alertwall.jpgMime Type: unknown/jpg
Group: Malware file
%UserProfile%\Local Settings\Application Data\Dirty\DirtyDecrypt.exe
File name: %UserProfile%\Local Settings\Application Data\Dirty\DirtyDecrypt.exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Start Menu\Programs\Startup\[RANDOM CHARACTERS].exe
File name: %UserProfile%\Start Menu\Programs\Startup\[RANDOM CHARACTERS].exeFile type: Executable File
Mime Type: unknown/exe
Group: Malware file
%UserProfile%\Application Data\Microsoft\Crypto\RSA\[SID]\c454754cf8997ff64bf863f7a733297e_7d2d450e-594b-4214-a88e-adb179f21516
File name: %UserProfile%\Application Data\Microsoft\Crypto\RSA\[SID]\c454754cf8997ff64bf863f7a733297e_7d2d450e-594b-4214-a88e-adb179f21516Group: Malware file
%UserProfile%\Application Data\Microsoft\Crypto\RSA\[SID]\f841fc663738bb69a5edcfa7a046c624_7d2d450e-594b-4214-a88e-adb179f21516
File name: %UserProfile%\Application Data\Microsoft\Crypto\RSA\[SID]\f841fc663738bb69a5edcfa7a046c624_7d2d450e-594b-4214-a88e-adb179f21516Group: Malware file
%UserProfile%\Application Data\Microsoft\Crypto\RSA\[SID]\76c6693205311293dabe1dd1d619ff3d_7d2d450e-594b-4214-a88e-adb179f21516
File name: %UserProfile%\Application Data\Microsoft\Crypto\RSA\[SID]\76c6693205311293dabe1dd1d619ff3d_7d2d450e-594b-4214-a88e-adb179f21516Group: Malware file
%UserProfile%\Application Data\Microsoft\Crypto\RSA\[SID]\92bd0cb3bb654c3ca25f64427cd8bdff_7d2d450e-594b-4214-a88e-adb179f21516
File name: %UserProfile%\Application Data\Microsoft\Crypto\RSA\[SID]\92bd0cb3bb654c3ca25f64427cd8bdff_7d2d450e-594b-4214-a88e-adb179f21516Group: Malware file
Registry Modifications
HKEY..\..\{Value}HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"DirtyDecrypt" = "\"\\?\%UserProfile%\Application Data\Dirty\DirtyDecrypt.exe\" \hide"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"[RANDOM CHARACTERS]" = "%UserProfile%\Local Settings\Application Data\Identities\[RANDOM CHARACTERS].exe"HKEY_LOCAL_MACHINE\SOFTWARE\{GUID}\"ID" = "[BINARY DATA]"HKEY_LOCAL_MACHINE\SOFTWARE\{GUID}\"PeriodDisabed" = "1"HKEY_CURRENT_USER\Software\{GUID}\"ID" = "[BINARY DATA]"HKEY_CURRENT_USER\Software\{GUID}\"PeriodDisabed" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"UacDisableNotify" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system\"EnableLUA" = "0"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"AntiVirusOverride" = "1"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Security Center\"FirewallOverride" = "1"HKEY_LOCAL_MACHINE\SAM\SAM\Domains\Builtin\"F" = "[BINARY DATA]"HKEY_LOCAL_MACHINE\SAM\SAM\Domains\Builtin\Aliases\00000220\"C" = "[BINARY DATA]"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\"Userinit" = "%System%\userinit.exe,,%ProgramFiles%\Adobe\[RANDOM CHARACTERS].exe"HKEY_LOCAL_MACHINE\SAM\SAM\Domains\Builtin\Aliases\Members\[SID]\000003ED\"(Default)" = "?\00?"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wscsvc\"Start" = "4"HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\wuauserv\"Start" = "4"
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