PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • 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: 5,698,455 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 05 Dec 2013

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 creates the following folders:

  • %User Profile%\Application Data\Java Update

(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
Java(TM)Platform SE Auto Updater Safe Mode = "%User Profile%\Java Update\jusched.exe"

It registers as a system service to ensure its automatic execution at every system startup by adding the following registry keys:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\AcpiPmie

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
services\adpchci

Other System Modifications

This Trojan adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Associations

HKEY_CURRENT_USER\Software\WinBlock

HKEY_CURRENT_USER\Software\WinBlock\
asdfwe

It adds the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
EnableLUA = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\policies\
system
ConsentPromptBehaviorAdmin = "0"

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
Associations
LowRiskFileTypes = ".exe"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\AcpiPmie
DisplayName = "AcpiPmie"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\AcpiPmie
Group = "File System"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\AcpiPmie
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\AcpiPmie
ImagePath = "system32\drivers\AcpiPmie.sys"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\AcpiPmie
Start = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\AcpiPmie
Type = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\adpchci
DisplayName = "adpchci"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\adpchci
ErrorControl = "1"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\adpchci
ImagePath = "system32\drivers\adpchci.sys"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\adpchci
Start = "0"

HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\
Services\adpchci
Type = "1"

Dropping Routine

This Trojan drops the following files:

  • %User Profile%\Java Update\jusched.exe
  • %User Temp%\Java7u30_update.exe
  • %System%\drivers\AcpiPmie.sys
  • %System%\drivers\adpchci.sys

(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.. %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista and 7.. %System% is the Windows system folder, which is usually C:\Windows\System32.)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine: 9.300

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\SYSTEM\CurrentControlSet\services
    • AcpiPmie
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services
    • adpchci
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies
    • Associations
  • In HKEY_CURRENT_USER\Software
    • WinBlock
  • In HKEY_CURRENT_USER\Software\WinBlock
    • asdfwe

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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • Java(TM)Platform SE Auto Updater Safe Mode = "%User Profile%\Java Update\jusched.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
    • EnableLUA = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\system
    • ConsentPromptBehaviorAdmin = "0"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\Associations
    • LowRiskFileTypes = ".exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\AcpiPmie
    • DisplayName = "AcpiPmie"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\AcpiPmie
    • Group = "File System"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\AcpiPmie
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\AcpiPmie
    • ImagePath = "system32\drivers\AcpiPmie.sys"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\AcpiPmie
    • Start = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\AcpiPmie
    • Type = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\adpchci
    • DisplayName = "adpchci"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\adpchci
    • ErrorControl = "1"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\adpchci
    • ImagePath = "system32\drivers\adpchci.sys"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\adpchci
    • Start = "0"
  • In HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\adpchci
    • Type = "1"

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 Profile%\Java Update\jusched.exe
  • %User Temp%\Java7u30_update.exe
  • %System%\drivers\AcpiPmie.sys
  • %System%\drivers\adpchci.sys

Step 6

Search and delete this folder

[ 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.
  • %User Profile%\Application Data\Java Update

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TROJ_BANLOAD.LAV. 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.


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