Home Malware Programs Trojans Trojan.Ransomlock.N

Trojan.Ransomlock.N

Posted: May 10, 2012

Threat Metric

Threat Level: 9/10
Infected PCs: 59
First Seen: May 10, 2012
OS(es) Affected: Windows

Trojan.Ransomlock.N is a Trojan that locks the desktop of the affected computer and makes the PC unusable. Trojan.Ransomlock.N then asks the PC user to pay a ransom and, thus, receive an unlock code to unlock the machine. Once executed, Trojan.Ransomlock.N copies itself to the certain location on the computer system. Trojan.Ransomlock.N modifies the Windows registry and creates several registry entries so that it can run automatically every time you start Windows. Trojan.Ransomlock.N also creates several registry entries in order to block Windows Registry Editor, Windows Task Manager and the desktop. Trojan.Ransomlock.N modifies some registry entries to cover icons. Get rid of Trojan.Ransomlock.N immediately after detection.

Aliases

Suspicious file [Panda]Dropper.Generic7.IGF [AVG]Trojan/Win32.Inject [AhnLab-V3]TR/Rogue.kdv.788924 [AntiVir]UnclassifiedMalware [Comodo]Mal/EncPk-AGD [Sophos]Trojan-Dropper.Win32.Dinwod.acr [Kaspersky]Win32:Carberp-ALL [Trj] [Avast]Trojan.Ransomlock.N [Symantec]Artemis!3A7FEF568856 [McAfee]

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:



%SystemDrive%\Users\<username>\AppData\Local\e54yher4h6j.exe File name: e54yher4h6j.exe
Size: 266.75 KB (266752 bytes)
MD5: 3a7fef568856529bfcfc7cdd75ace515
Detection count: 21
File type: Executable File
Mime Type: unknown/exe
Path: %SystemDrive%\Users\<username>\AppData\Local
Group: Malware file
Last Updated: November 29, 2012
%APPDATA%\itunes_service01.exe File name: itunes_service01.exe
Size: 320 KB (320000 bytes)
MD5: 56f4d5837af32b12069576fae8c2b3c5
Detection count: 16
File type: Executable File
Mime Type: unknown/exe
Path: %APPDATA%
Group: Malware file
Last Updated: June 18, 2012
%APPDATA%\ArchiverforWin.exe File name: ArchiverforWin.exe
Size: 207.87 KB (207872 bytes)
MD5: 51efd076876fe7fa49fe69f377720e85
Detection count: 16
File type: Executable File
Mime Type: unknown/exe
Path: %APPDATA%
Group: Malware file
Last Updated: June 18, 2012
%USERPROFILE%\Application Data\flint4ytw.exe File name: flint4ytw.exe
Size: 308.22 KB (308224 bytes)
MD5: 21e582cc765de5bb58191200e9f54e77
Detection count: 5
File type: Executable File
Mime Type: unknown/exe
Path: %USERPROFILE%\Application Data
Group: Malware file
Last Updated: June 18, 2012
%UserProfile%\Application Data\itunes_service01.exe File name: %UserProfile%\Application Data\itunes_service01.exe
File type: Executable File
Mime Type: unknown/exe
Group: Malware file

Registry Modifications

The following newly produced Registry Values are:

HKEY..\..\{Value}HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\"Userinit" = "%UserProfile%\Application Data\itunes_service01.exe,C:\WINDOWS\System32\userinit.exe,"HKEY_CURRENT_USER\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\"Shell" = "%UserProfile%\Application Data\itunes_service01.exe"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\"[RANDOM CHARACTERS]" = "%UserProfile%\Application Data\itunes_service01.exe"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Active Setup\Installed Components\{Bj9oGoDo-wn3q-TS4w-kuRv-OWYzmoDRGxZa}\"[RANDOM CHARACTERS]" = "\"%UserProfile%\Application Data\itunes_service01.exe\" /ActiveX"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\"Shell" = "%UserProfile%\Application Data\itunes_service01.exe"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run\"[RANDOM CHARACTERS]" = "%UserProfile%\Application Data\itunes_service01.exe"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\"Userinit" = "%UserProfile%\Application Data\itunes_service01.exe,C:\WINDOWS\System32\userinit.exe,"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer\"NoDesktop" = "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced\"HideIcons" = "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\"DisableTaskMgr" = "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\System\"DisableRegistryTools" = "1"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\0\"1400" = "0"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\3\"1400" = "0"HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Zones\1\"1400" = "0"HKEY..\..\..\..{Subkeys}HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\Connections\"DefaultConnectionSettings"
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