Analysis by: Raighen Sanchez
ALIASES:

Trojan:WinNT/Conficker.B (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Rootkit

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

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

It does not have any propagation routine.

It does not have any information-stealing capability.

  TECHNICAL DETAILS

Tamaño del archivo 4,096 bytes
Tipo de archivo SYS
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 17 Mar 2024

Arrival Details

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

Propagation

This Rootkit does not have any propagation routine.

Information Theft

This Rootkit does not have any information-stealing capability.

Other Details

This Rootkit does the following:

  • It creates a symbolic link accessible to user-mode applications, enabling attackers to issue commands or control the driver directly.
  • It locates the driver tcpip.sys then modifies the driver to potentially alter network behavior or inject malicious code.
  • It minimizes activity by disconnecting the symbolic link and unloading its driver after its malicious usage.

It does not exploit any vulnerability.

  SOLUTION

Motor de exploración mínimo 9.800
Primer archivo de patrones de VSAPI 19.744.02
Primera fecha de publicación de patrones de VSAPI 28 Nov 2024
Versión de patrones OPR de VSAPI 19.745.00
Fecha de publicación de patrones OPR de VSAPI 29 Nov 2024

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as Rootkit.Win32.DOWNAD.A. 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 the following Trend Micro Support pages for more information:


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