Trojan-Spy:W32/Goldun.RR, Trojan-Spy:W32/Goldun.RR, Trojan-Spy.Win32.Goldun.axt


A trojan that secretly installs spy programs, such as keyloggers.

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Technical Details

Trojan-Spy:W32/Goldun.RR will install two other malicious programs on the machine before terminating itself; subsequently, the malwares will communicate with a remote site without the user's knowledge or consent. Unlike most malware, Goldun.RR will make registry changes that allow it to run even in Safe Boot Mode.


During installation, Goldun.RR drops the following files:

  • C:\WINDOWS\system32\cabpck.dll - detected as Trojan-Spy.Win32.Goldun.axn.
  • C:\WINDOWS\system32\krnlcab.sys - detected as Trojan-Spy.Win32.Goldun.axr.

The main file create this process and terminate itself:

  • C:\WINDOWS\system32\rundll32.exe cabpck.dll,cabpck


Once installed, Goldun.RR attempts to connect to:


Registry Changes

It creates a launch point using winlogon event:

  • HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\cabpck DllName = cabpck.dll Startup = cabpck Impersonate = 00000001 Asynchronous = 00000001 MaxWait = 00000001 a950 = [2E09BF121A42171A6]

Goldun.RR registers itself as a service:

  • HKLM\System\CurrentControlSet\Services\krnlcab Type = 00000001 Start = 00000001 ErrorControl = 00000000 ImagePath = system32\krnlcab.sys DisplayName = Cabinet Kernel Packer
  • HKLM\System\CurrentControlSet\Services\krnlcab\Security Security = \x01\x00\x14\x80\x90\x00\x00\x00\x9C\x00\x00\[...]

Creates this entry so that it will load during safe boot mode:

  • HKLM\SYSTEM\CurrentControlSet\Control\SafeBoot\Minimal\krnlcab.sys (default) = Driver

Adds its connection to the Windows firewall list so as by-pass it:

  • HKLM\SYSTEM\ControlSet001\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile \AuthorizedApplications\List\ C:\WINDOWS\system32\rundll32.exe = C:\WINDOWS\system32\rundll32.exe:*:Enabled:rundll32