ALIASES:

Trojan:Win32/Delfsnif.gen!I (Microsoft); New P2P Worm !! (McAfee); W32.SillyP2P (Symantec); BehavesLike.Win32.Malware.ssc (mx-v) (Sunbelt); Generic.Malware.SN!.21CCBC35 (FSecure)

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 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

Tamaño del archivo 41,116 bytes
Tipo de archivo EXE
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 09 Dec 2012

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 drops the following copies of itself into the affected system:

  • %System%\Live-Messenger.exe
  • %System Root%\My Downloads\DCUtoPAS_Visualizardor_DCU.exe
  • %System Root%\Downloads\DCUtoPAS_Visualizardor_DCU.exe
  • %System Root%\My Shared Folder\Emule_Acelerator.exe
  • %Program Files%\Warez P2P Client\My Shared Folder\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\eMule\Incoming\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\gnucleus\Downloads\Emule_Acelerator.exe
  • %Program Files%\Morpheus\Downloads\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\KMD\My Shared Folder\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\BearShare\Shared\Kazaa_auto_downloads.exe
  • %Program Files%\KaZaa Lite\My Shared Folder\Kazaa_auto_downloads.exe
  • %Program Files%\KaZaa\My Shared Folder\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\Grokster\My Shared Folder\Kazaa_auto_downloads.exe
  • %System Root%\Downloads\Emule_Acelerator.exe
  • %System Root%\My Shared Folder\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\eMule\Incoming\Emule_Acelerator.exe
  • %Program Files%\gnucleus\Downloads\Kazaa_auto_downloads.exe
  • %Program Files%\Morpheus\Downloads\Emule_Acelerator.exe
  • %Program Files%\BearShare\Shared\Emule_Acelerator.exe
  • %Program Files%\KaZaa Lite\My Shared Folder\Emule_Acelerator.exe
  • %Program Files%\KaZaa\My Shared Folder\Emule_Acelerator.exe
  • %Program Files%\Grokster\My Shared Folder\DCUtoPAS_Visualizardor_DCU.exe
  • %System Root%\My Shared Folder\Kazaa_auto_downloads.exe
  • %Program Files%\gnucleus\Downloads\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\Morpheus\Downloads\Kazaa_auto_downloads.exe
  • %Program Files%\KaZaa Lite\My Shared Folder\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\Grokster\My Shared Folder\Emule_Acelerator.exe
  • %System Root%\My Downloads\Kazaa_auto_downloads.exe
  • %System Root%\My Downloads\Emule_Acelerator.exe
  • %Program Files%\KMD\My Shared Folder\Kazaa_auto_downloads.exe
  • %Program Files%\Warez P2P Client\My Shared Folder\Emule_Acelerator.exe
  • %Program Files%\eMule\Incoming\Kazaa_auto_downloads.exe
  • %Program Files%\KMD\My Shared Folder\Emule_Acelerator.exe
  • %Program Files%\BearShare\Shared\DCUtoPAS_Visualizardor_DCU.exe
  • %Program Files%\KaZaa\My Shared Folder\Kazaa_auto_downloads.exe
  • %System Root%\Downloads\Kazaa_auto_downloads.exe
  • %Program Files%\Warez P2P Client\My Shared Folder\Kazaa_auto_downloads.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.. %System Root% is the root folder, which is usually C:\. It is also where the operating system is located.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), and 7 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), and 7 (64-bit).)

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Live-Messenger.exe = "%System%\Live-Messenger.exe"

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://www.{BLOCKED}erelacionamento.com.br/update/kl_dadim.exe

This report is generated via an automated analysis system.

  SOLUTION

Motor de exploración mínimo 9.300

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Restart in Safe Mode

[ Learn More ]

Step 3

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\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Live-Messenger.exe = "%System%\Live-Messenger.exe"

Step 4

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_DLOADER.RUV. 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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