TROJ_GAMETH.SML3


 ALIASES:

Backdoor:Win32/Hupigon.ZAJ (Microsoft); Infostealer.Gampass (Symantec); Backdoor.Win32.FirstInj.fdo (Kaspersky); Trojan.Generic.5200131 (FSecure)

 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

139,382 bytes

File Type:

EXE

Initial Samples Received Date:

30 Sep 2011

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

This Trojan creates the following folders:

  • %System Root%\Documents and Settings\Local User

(Note: %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.)

Autostart Technique

This Trojan registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\360svc\Parameters

Other System Modifications

This Trojan deletes the following files:

  • {malware path and file name}

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc
Description = "¼à²âºÍ¼àÊÓÐÂÓ²¼þÉ豸"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc\Parameters
ServiceDll = "%User Profile%\360safe.dll"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc\Parameters
ServiceMain = "MyLive"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc
InstallModule = "{malware path and file name}"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\360svc
Type = 12

It modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows NT\CurrentVersion\SvcHost
netsvcs = ""6to4,AppMgmt,AudioSrv,Browser,CryptSvc,DMServer,DHCP,ERSvc,EventSystem,FastUserSwitchingCompatibility,HidServ,Ias,Iprip,Irmon,LanmanServer,LanmanWorkstation,Messenger,Netman,Nla,Ntmssvc,NWCWorkstation,Nwsapagent,Rasauto,Rasman,Remoteaccess,Schedule,Seclogon,SENS,Sharedaccess,SRService,Tapisrv,Themes,TrkWks,W32Time,WZCSVC,Wmi,WmdmPmSp,winmgmt,wscsvc,xmlprov,BITS,wuauserv,ShellHWDetection,helpsvc,WmdmPmSN,360svc""

(Note: The default value data of the said registry entry is 6to4.)

Dropping Routine

This Trojan drops the following files:

  • %User Profile%\360safe.dll

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Restart in Safe Mode

[ Learn More ]

Step 3

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\360svc
    • Parameters

Step 4

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc
    • Description="¼à²âºÍ¼àÊÓÐÂÓ²¼þÉ豸"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc\Parameters
    • ServiceDll="%User Profile%\360safe.dll"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc\Parameters
    • ServiceMain="MyLive"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc
    • InstallModule="{malware path and file name}"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\360svc
    • Type=12

Step 5

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\SvcHost
    • From: netsvcs=""6to4,AppMgmt,AudioSrv,Browser,CryptSvc,DMServer,DHCP,ERSvc,EventSystem,FastUserSwitchingCompatibility,HidServ,Ias,Iprip,Irmon,LanmanServer,LanmanWorkstation,Messenger,Netman,Nla,Ntmssvc,NWCWorkstation,Nwsapagent,Rasauto,Rasman,Remoteaccess,Schedule,Seclogon,SENS,Sharedaccess,SRService,Tapisrv,Themes,TrkWks,W32Time,WZCSVC,Wmi,WmdmPmSp,winmgmt,wscsvc,xmlprov,BITS,wuauserv,ShellHWDetection,helpsvc,WmdmPmSN,360svc""
      To: netsvcs=6to4

Step 6

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result. %System Root%\Documents and Settings\Local User

Step 7

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result. %User Profile%\360safe.dll

Step 8

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_GAMETH.SML3. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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