Sophos

Troj/Cimuz-D

Aliases
  • Trojan-Proxy.Win32.Cimuz.y
  • BackDoor-CLK
  • TROJ_DLOADER.ZJ
Category
Type
What to do
Prevalence low high

Summary

 
Affected operating systems Windows
Characteristics
  • Drops more malware
  • Installs itself in the registry
Included in our products from November 2005 (3.99)
Protection available since 29 September 2005 22:36:11 (GMT)
Detected by All Sophos products

Action

More Information

Troj/Cimuz-D is a backdoor Trojan which allows a remote intruder to gain access and control over the computer.

Troj/Cimuz-D includes functionality to access the internet and communicate with a remote server via HTTP.

When first run Troj/Cimuz-D copies itself to <System>\mdms.exe and creates the file <System>\winacpi.dll.

The following registry entry is created to run mdms.exe on startup:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
SysMemory manager
<System>\mdms.exe

The file winacpi.dll is registered as a COM object, creating registry entries under:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved\(5E2121EE-0300-11D4-8D3B-444553540000)
HKCR\CLSID\(5E2121EE-0300-11D4-8D3B-444553540000)
HKCR\Interface\(5E2121ED-0300-11D4-8D3B-444553540000)
HKCR\TypeLib\(5E2121E1-0300-11D4-8D3B-444553540000)
HKCR\acpi.acpi.1\
HKCR\acpi.ext\

The following registry entries are set, affecting internet security:

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\ FirewallPolicy\

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\ StandardProfile\

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\ StandardProfile\AuthorizedApplications\

HKLM\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\ StandardProfile\AuthorizedApplications\List\

The following registry entry is set:

HKCR\*\shellex\ContextMenuHandlers\sysacpildap
(default)
(5E2121EE-0300-11D4-8D3B-444553540000)

Registry entries are created under:

HKCU\Software\mzs\mdms\mzu\

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