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JAVA_ADWIND.XSS

February 18, 2016
 Analysis by: RonJay Kristoffer Caragay
 ALIASES:

Trojan:Java/Adwind.P (Microsoft); Java/Adwind.RZ (ESET-NOD32); Trojan.Java.Adwind.BR (F-Secure); Adwind.c!jar (McAfee); Trojan.Java.Agent.fq (Kaspersky); Trojan.Java.Adwind (Ikarus); Java.Trojan.Adwind.AK (BitDefender); Troj/JavaBz-ACO (Sophos);

 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 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:

119,676 bytes

File Type:

JAR

Initial Samples Received Date:

19 Jan 2016

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 copies of itself into the affected system:

  • %User Profile%\NsxSEkOhfTT\GswTuLDRCzX.NLHPIF

(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 drops the following files:

  • %System%\test.txt
  • %User Profile%\NsxSEkOhfTT\ID.txt
  • %User Profile%\NsxSEkOhfTT\XQcrNwycIqd\009.SpedP
  • %Application Data%\Oracle\{copies of files under Java Installation folder}

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %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.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It creates the following folders:

  • %User Profile%\NsxSEkOhfTT
  • %User Profile%\NsxSEkOhfTT\XQcrNwycIqd
  • %Application Data%\Oracle

(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.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
SzoWDGrDutk = "%Application Data%\Oracle\bin\javaw.exe" -jar "%User Profile%\NsxSEkOhfTT\GswTuLDRCzX.NLHPIF"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
SzoWDGrDutk = "%Application Data%\Oracle\bin\javaw.exe" -jar "%User Profile%\NsxSEkOhfTT\GswTuLDRCzX.NLHPIF"

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.208.115:1197

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.282.07

FIRST VSAPI PATTERN DATE:

20 Jan 2016

VSAPI OPR PATTERN File:

12.283.00

VSAPI OPR PATTERN Date:

20 Jan 2016

NOTES:

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

All Internet users:

  • Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
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