arrow_back
search
close

JAVA_ADWIND.CG

August 11, 2015
 Analysis by: Sammy Chua
 ALIASES:

Trojan:Java/Adwind (Microsoft); Troj/JavaDL-XO (Sophos); Trojan.Java.Adwind.q (Kaspersky)

 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:

110,628 bytes

File Type:

JAR

Initial Samples Received Date:

28 Jul 2015

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.

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
APJVcdfH9bI = ""%User Profile%\YkzupW5RUVp\IF6tUr\bin\javaw.exe" -jar "%User Profile%\YkzupW5RUVp\YkzupW5RUVp\YhTnvd2sutN.WUXuft""

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Wbem

HKEY_CURRENT_USER\Software\Microsoft\
Wbem\WMIC

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Wbem\WMIC
mofcompMUIStatus = "{number}"

HKEY_CURRENT_USER\Software\Microsoft\
Wbem\WMIC
WMICLC = "{number}"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Wbem\WMIC
Cli.mof = "{number}"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Wbem\WMIC
CliEgAliases.mof = "{number}"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Wbem\WMIC
CliEgAliases.mfl = "{number}"

HKEY_LOCAL_MACHINE\Software\Microsoft\
Wbem\WMIC
mofcompstatus = "{number}"

Dropping Routine

This Trojan drops the following files:

  • %User Temp%\hsperfdata_{user name}\2028
  • %Windows%\t.txt
  • %User Profile%\YkzupW5RUVp\YkzupW5RUVp\YhTnvd2sutN.WUXuft
  • %User Temp%\hsperfdata_{user name}\1884

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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.. %Windows% is the Windows folder, where it usually is C:\Windows 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.)

NOTES:

It copies the files in %Program Files%\Java\jre6 to %User Profile%\YkzupW5RUVp\IF6tUr\.

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.818.04

FIRST VSAPI PATTERN DATE:

28 Jul 2015

VSAPI OPR PATTERN File:

11.819.00

VSAPI OPR PATTERN Date:

29 Jul 2015

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.
  • Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.


Did this description help? Tell us how we did.