Analysis by: Rhena Inocencio
ALIASES:

TrojanDropper:Win32/Sality.AU (Microsoft), W32/Sality.dr (McAfee), Trojan.Dropper (Symantec)

 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:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Canal de infección Dropped by other malware

This Trojan may be dropped by other malware.

  TECHNICAL DETAILS

Tamaño del archivo Varies
Tipo de archivo DLL
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 22 Mar 2013
Carga útil Drops files

Arrival Details

This Trojan may be dropped by the following malware:

  • PE_SALITY

This malware arrives via the following means:

  • This is executed by a malicious LNK file detected by Trend Micro as EXPL_CPLNK.SM

NOTES:

This Trojan arrives on the system using the following name:

  • {random file name}.tmp

It contains the encyrpted copy of the mother file of PE_SALITY.

It drops the mother file using the following name:

  • %User Temp%\{random filename}.exe - detected as PE_SALITY.ER-O

It executes the dropped file. As a result, malicious routines of the dropped files are exhibited on the affected system.

  SOLUTION

Motor de exploración mínimo 9.300
Primer archivo de patrones de VSAPI 9.818.06
Primera fecha de publicación de patrones de VSAPI 26 Mar 2013
Versión de patrones OPR de VSAPI 9.819.00
Fecha de publicación de patrones OPR de VSAPI 26 Mar 2013

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

Remove the malware/grayware file dropped/downloaded by TROJ_SALITY.SM

Step 3

Scan your computer with your Trend Micro product to clean files detected as TROJ_SALITY.SM. 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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