➔
search
✕

TSPY_ZBOT.PIO

October 09, 2012
 Analysis by: Jed Valderama
 ALIASES:

Kaspersky: Trojan-Spy.Win32.Zbot.enkv, Symantec: Win32/Spy.Zbot.AAO trojan

 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

This file contains a URL where it connects to possibly download other files.

  TECHNICAL DETAILS

File Size:

194,290 bytes

File Type:

EXE

Initial Samples Received Date:

09 Aug 2012

Arrival Details

This spyware 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 spyware drops the following files:

  • %Application Data%\{random letters 1}\{random letters}.exe - copy of itself
  • %Application Data%\{random letters 2}\{random letters}.{random letters} - encrypted file

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

It creates the following folders:

  • %Application Data%\{random letters 1}
  • %Application Data%\{random letters 2}

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Windows\Profiles\{user name}\Application Data on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Application Data on Windows NT, and C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, XP, and Server 2003.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{GUID} = "%Application Data%\{random letters 1}\{random letters}.exe"

Other System Modifications

This spyware adds the following registry keys as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
{random letters}

Other Details

This file contains a URL where it connects to possibly download other files. As of this writing, this file contains the following URLs:

  • http://{BLOCKED}rmvare114.in/run45/file.php|file=cc45.bin