Analysis by: Odessy Silva
ALIASES:

TrojanDropper:Win32/Rovnix (Microsoft), Trojan.Win32.Cidox.akxs (Kaspersky)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Canal de infección Downloaded from the Internet, Dropped by other malware

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.

As of this writing, the said sites are inaccessible.

It restarts the affected system. It deletes itself after execution.

  TECHNICAL DETAILS

Tamaño del archivo 151,552 bytes
Tipo de archivo EXE
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 10 Jun 2014
Carga útil Connects to URLs/IPs, Downloads files

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.

File Infection

This Trojan adds the following registry entries that act as infection markers:

HKEY_LOCAL_MACHINE\Software\Classes\
CLSID\{CLSID}

Download Routine

This Trojan connects to the following URL(s) to download its component file(s):

  • http://{BLOCKED}g-serilg.su

As of this writing, the said sites are inaccessible.

Other Details

This Trojan restarts the affected system.

It deletes itself after execution.

  SOLUTION

Motor de exploración mínimo 9.700
Primer archivo de patrones de VSAPI 10.854.06
Primera fecha de publicación de patrones de VSAPI 10 Jun 2014
Versión de patrones OPR de VSAPI 10.855.00
Fecha de publicación de patrones OPR de VSAPI 10 Jun 2014

Scan your computer with your Trend Micro product to delete files detected as TROJ_CIDOX.WCW. 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.

NOTES:
It modifies the NTFS boot sector to load its encrypted code.


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