TSPY_KEYLOG.JWE

November 26, 2013
 ALIASES:

Trojan.ADH (Symantec); ARC:Xenocode (Kaspersky); Trojan.Win32.Generic!BT (Sunbelt)

 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.

  TECHNICAL DETAILS

File Size:

1,346,005 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

22 Jan 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.

Other System Modifications

This spyware deletes the following files:

  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual\XRegistry.bin

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

It adds the following registry keys:

HKEY_CURRENT_USER\Software\Xenocode

HKEY_CURRENT_USER\Software\Xenocode\
SandboxCache

HKEY_CURRENT_USER\Software\Xenocode\
SandboxCache\019EC25A

HKEY_CURRENT_USER\Software\Xenocode\
SandboxCache\019EC25A\Virtual

HKEY_CURRENT_USER\Software\Xenocode\
SandboxCache\019EC25A\Virtual\
MODIFIED

HKEY_CURRENT_USER\Software\Xenocode\
SandboxCache\019EC25A\Virtual\
MODIFIED\@HKLM@

HKEY_CURRENT_USER\Software\Xenocode\
SandboxCache\019EC25A\Virtual\
MODIFIED\@HKCR@

HKEY_CURRENT_USER\Software\Xenocode\
SandboxCache\019EC25A\Virtual\
MODIFIED\@HKCR@\CLSID

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
MountPoints2\{d94104a5-f82c-11e0-a858-806d6172696f}
BaseClass = "Drive"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
MountPoints2\{d94104a2-f82c-11e0-a858-806d6172696f}
BaseClass = "Drive"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
MountPoints2\D
BaseClass = "Drive"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Shell Folders
Personal = "%User Profile%\My Documents"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Shell Folders
Common Documents = "%User Profile%\Documents"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Shell Folders
Desktop = "%Desktop%"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
Shell Folders
Common Desktop = "%Desktop%"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
ProxyBypass = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
IntranetName = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
UNCAsIntranet = "1"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Shell Folders
Cache = "%Temporary Internet Files%"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Shell Folders
Cookies = "%User Profile%\Cookies"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\ShellNoRoam\MUICache
%System Root%\pict7-12-2011.exe = "pict7-12-2011"

Dropping Routine

This spyware drops the following files:

  • %Application Data%\Xenocode
  • %Application Data%\Xenocode\Sandbox
  • %Application Data%\Xenocode\Sandbox\Pictures
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual\STUBEXE
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual\STUBEXE\@APPDIR@
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual\STUBEXE\@APPDIR@\pict7-12-2011.exe

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

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.200

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software
    • Xenocode
  • In HKEY_CURRENT_USER\Software\Xenocode
    • SandboxCache
  • In HKEY_CURRENT_USER\Software\Xenocode\SandboxCache
    • 019EC25A
  • In HKEY_CURRENT_USER\Software\Xenocode\SandboxCache\019EC25A
    • Virtual
  • In HKEY_CURRENT_USER\Software\Xenocode\SandboxCache\019EC25A\Virtual
    • MODIFIED
  • In HKEY_CURRENT_USER\Software\Xenocode\SandboxCache\019EC25A\Virtual\MODIFIED
    • @HKLM@
  • In HKEY_CURRENT_USER\Software\Xenocode\SandboxCache\019EC25A\Virtual\MODIFIED
    • @HKCR@
  • In HKEY_CURRENT_USER\Software\Xenocode\SandboxCache\019EC25A\Virtual\MODIFIED\@HKCR@
    • CLSID

Step 3

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d94104a5-f82c-11e0-a858-806d6172696f}
    • BaseClass="Drive"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\{d94104a2-f82c-11e0-a858-806d6172696f}
    • BaseClass="Drive"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MountPoints2\D
    • BaseClass="Drive"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
    • Personal="%User Profile%\My Documents"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
    • Common Documents="%User Profile%\Documents"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
    • Desktop="%Desktop%"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
    • Common Desktop="%Desktop%"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
    • ProxyBypass="1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
    • IntranetName="1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
    • UNCAsIntranet="1"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
    • Cache="%Temporary Internet Files%"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Shell Folders
    • Cookies="%User Profile%\Cookies"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\ShellNoRoam\MUICache
    • %System Root%\pict7-12-2011.exe="pict7-12-2011"

Step 4

Search and delete these components

[ Learn More ]
There may be some components that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Application Data%\Xenocode
  • %Application Data%\Xenocode\Sandbox
  • %Application Data%\Xenocode\Sandbox\Pictures
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual\STUBEXE
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual\STUBEXE\@APPDIR@
  • %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual\STUBEXE\@APPDIR@\pict7-12-2011.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as TSPY_KEYLOG.JWE. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.

Step 6

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again. %Application Data%\Xenocode\Sandbox\Pictures\4.0.0.1\2011.12.10T10.50\Virtual\XRegistry.bin


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