JAVA_BANLOAD.TNB

September 18, 2015
 Analysis by: Anthony Joe Melgarejo
 Modified by: Francis Xavier Antazo
 ALIASES:

Trojan:Java/Adwind.F (Microsoft)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

  TECHNICAL DETAILS

File Size:

98,227 bytes

Initial Samples Received Date:

19 Aug 2015

Arrival Details

This Trojan arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It 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:

  • %User Profile%\LZzglosoHNob\POFE2Pbb\{copy of files under Java Installation folder}
  • %Windows%\t.txt

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It drops the following copies of itself into the affected system:

  • %User Profile%\LZzglosoHNob\LZzglosoHNob\194BOhv0M0nb.U4hGC1b

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It creates the following folders:

  • %User Profile%\LZzglosoHNob
  • %User Profile%\LZzglosoHNob\b7PnlYR4bTiv
  • %User Profile%\LZzglosoHNob\LZzglosoHNob
  • %User Profile%\LZzglosoHNob\POFE2Pbb

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Run
PE9FI1EVfdbl = "%User Profile%\LZzglosoHNob\POFE2Pbb\bin\javaw.exe" -jar "%User Profile%\LZzglosoHNob\LZzglosoHNob\194BOhv0M0nb.U4hGC1b"

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.181.94