ALIASES:

Keylog-Ardamax.dll (McAfee); Trojan Horse (Symantec); Monitor.Win32.Ardamax.ac (Kaspersky); Trojan.1 (Sunbelt); Trojan horse PSW.Generic8.JSB (AVG)

 PLATFORM:

Windows

 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: 428,587 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 04 Apr 2015

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.

Installation

This spyware creates the following folders:

  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • %User Temp%\nsr5.tmp
  • %Program Files%\HTV
  • %Start Menu%\Programs\Ardamax Keylogger

(Note: %System Root% is the Windows root folder, where it usually is C:\ 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.. %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.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %Start Menu% is the Start Menu folder, where it usually is C:\Documents and Settings\{user name}\Start Menu on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu 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 spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
HTV Agent = "%Program Files%\HTV\HTV.exe"

Other System Modifications

This spyware deletes the following files:

  • %User Temp%\nsw1.tmp
  • %User Temp%\nsr5.tmp

(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.)

It adds the following registry keys:

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\Uninstall\
Ardamax Keylogger

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ardamax Keylogger
DisplayName = "Ardamax Keylogger 2.8"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Uninstall\
Ardamax Keylogger
UninstallString = "%Program Files%\HTV\Uninstall.exe"

Dropping Routine

This spyware drops the following files:

  • %User Temp%\nsw3.tmp
  • %User Temp%\nsr5.tmp\ioSpecial.ini
  • %User Temp%\nsr5.tmp\modern-wizard.bmp
  • %User Temp%\nsr5.tmp\modern-header.bmp
  • %Program Files%\HTV\HTV.exe
  • %Program Files%\HTV\HTV.006
  • %Program Files%\HTV\HTV.007
  • %Program Files%\HTV\HTV.003
  • %Program Files%\HTV\HTV.004
  • %Program Files%\HTV\AKV.exe
  • %Program Files%\HTV\qs.html
  • %Program Files%\HTV\tray.gif
  • %Program Files%\HTV\menu.gif
  • %Program Files%\HTV\HTV.chm
  • %Program Files%\HTV\Uninstall.exe
  • %User Temp%\nsr5.tmp\InstallOptions.dll
  • %Program Files%\HTV\HTV.001

(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.. %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.750

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

Restart in Safe Mode

[ Learn More ]

Step 3

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_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Uninstall
    • Ardamax Keylogger

Step 4

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • HTV Agent = "%Program Files%\HTV\HTV.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ardamax Keylogger
    • DisplayName = "Ardamax Keylogger 2.8"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Ardamax Keylogger
    • UninstallString = "%Program Files%\HTV\Uninstall.exe"

Step 5

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.
  • %User Temp%\nsw3.tmp
  • %User Temp%\nsr5.tmp\ioSpecial.ini
  • %User Temp%\nsr5.tmp\modern-wizard.bmp
  • %User Temp%\nsr5.tmp\modern-header.bmp
  • %Program Files%\HTV\HTV.exe
  • %Program Files%\HTV\HTV.006
  • %Program Files%\HTV\HTV.007
  • %Program Files%\HTV\HTV.003
  • %Program Files%\HTV\HTV.004
  • %Program Files%\HTV\AKV.exe
  • %Program Files%\HTV\qs.html
  • %Program Files%\HTV\tray.gif
  • %Program Files%\HTV\menu.gif
  • %Program Files%\HTV\HTV.chm
  • %Program Files%\HTV\Uninstall.exe
  • %User Temp%\nsr5.tmp\InstallOptions.dll
  • %Program Files%\HTV\HTV.001

Step 6

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %System Root%\DOCUME~1
  • %System Root%\DOCUME~1\Wilbert
  • %User Profile%\LOCALS~1
  • %User Temp%\nsr5.tmp
  • %Program Files%\HTV
  • %Start Menu%\Programs\Ardamax Keylogger

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_ARDAMAX.R. 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 8

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.

  • %User Temp%\nsw1.tmp
  • %User Temp%\nsr5.tmp


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