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JAVA_ADWIND.YZZS

September 16, 2015
 ALIASES:

Trojan:Java/Adwind.J (Microsoft); Java/Adwind.HR (ESET-NOD32); Trojan.Java.Adwind (Ikarus); BackDoor-FCRJ!Adwind (McAfee); JAVA/Adwind.gfs (Avira); Java.Adwind.B (BitDefender)

 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:

101,361 bytes

File Type:

JAR

Initial Samples Received Date:

10 Aug 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.

Installation

This Trojan drops the following copies of itself into the affected system:

  • %User Profile%\JdhsLcg3p8x\JdhsLcg3p8x\9L49GQIzrjh.vlTV7c

(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:

  • %User Profile%\JdhsLcg3p8x\BHFtwe\{copies 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 creates the following folders:

  • %User Profile%\JdhsLcg3p8x
  • %User Profile%\JdhsLcg3p8x\BHFtwe
  • %User Profile%\JdhsLcg3p8x\JdhsLcg3p8x
  • %User Profile%\JdhsLcg3p8x\v0yhUowT63u

(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_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
4NlMlMnpSwI = ""%User Profile%\JdhsLcg3p8x\BHFtwe\bin\javaw.exe" -jar "%User Profile%\JdhsLcg3p8x\JdhsLcg3p8x\9L49GQIzrjh.vlTV7c""

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
4NlMlMnpSwI = ""%User Profile%\JdhsLcg3p8x\BHFtwe\bin\javaw.exe" -jar "%User Profile%\JdhsLcg3p8x\JdhsLcg3p8x\9L49GQIzrjh.vlTV7c""

Other Details

This Trojan connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.129.211