Analysis by: Rika Joi Gregorio
ALIASES:

Trojan-Ransom.Win32.PornoAsset.ckkk(Kaspersky), TrojanDropper:Win32/Rovnix.L(Microsoft), Trojan.Cidox.C(Symantec), PWSZbot-FRG!56DB6A59AEBB(McAfee), Trojan-PWS.Win32.Fareit(Ikarus), a variant of Win32/Kryptik.BRHX trojan(Eset)

 PLATFORM:

Windows

 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.

It restarts the affected system.

  TECHNICAL DETAILS

Tamaño del archivo 280,576 bytes
Tipo de archivo EXE
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 04 Sep 2014
Carga útil Steals information

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 files:

  • %System%\{random file name}

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

It drops and executes the following files:

  • {malware path}\{random 8 characters}.bat - used to delete itself

Other Details

This Trojan checks for the presence of the following process(es):

  • vmusrvc.exe
  • vpcmap.exe
  • vmsrvc.exe
  • vboxservice.exe
  • vboxtray.exe
  • ollydbg.exe
  • windbg.exe
  • idag.exe
  • idag64.exe
  • pexplorer.exe
  • lordpe.exe
  • hiew32.exe
  • bindiff.exe
  • wireshark.exe

It restarts the affected system.

NOTES:

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

It also hooks the following APIs:

  • NtQueryDirectoryFile
  • NtClose
  • NtOpenFile
  • NtQueryInformationFile
  • NtSetInformationFile
  • NtCreateFile
  • NtDeleteFile
  • NtShutdownSystem
  • NtOpenKey
  • NtEnumerateKey
  • NtCreateKey

This malware log keys, Ammyy Admin IDs, and passwords.

  SOLUTION

Motor de exploración mínimo 9.700
Primer archivo de patrones de VSAPI 11.128.05
Primera fecha de publicación de patrones de VSAPI 05 Sep 2014
Versión de patrones OPR de VSAPI 11.129.00
Fecha de publicación de patrones OPR de VSAPI 05 Sep 2014

NOTES:

For Trend Micro product users, use the ATTK with ATRT to restore the modified Initial Program Loader (IPL) of an active NTFS partition.


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