ADW_DLGUIDE

February 01, 2015
 ALIASES:

Trojan.Win32.Generic!BT (Sunbelt)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Adware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This adware 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:

1,048,928 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

01 Feb 2015

Arrival Details

This adware 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 adware creates the following folders:

  • %User Temp%\is-5A82N.tmp
  • %User Temp%\is-IV8UJ.tmp
  • %User Temp%\is-IV8UJ.tmp\_isetup

(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.)

Other System Modifications

This adware adds the following registry keys:

HKEY_CURRENT_USER\Software\Sysinternals\
PsKill

HKEY_LOCAL_MACHINE\Software\Microsoft\
Windows\CurrentVersion\MCD

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Sysinternals\
PsKill
EulaAccepted = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\MCD
Enable = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\MCD
SwapSync = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\MCD
Palettized Formats = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\MCD
IO Priority = "0"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\MCD
Use Generic Stencil = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\MCD
Enumerate as ICD = "0"

Dropping Routine

This adware drops the following files:

  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/sdan.exe
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/sdapk.exe
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/sdaspwn.exe
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/licence.txt
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/excel-urlaubs-und-absenzkalender_small_17.png
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/dvFerienKalender_V5.exe
  • %User Temp%\is-5A82N.tmp\dvFerienKalender_V5.tmp
  • %User Temp%\is-IV8UJ.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-IV8UJ.tmp\_isetup\_shfoldr.dll

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %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.)

Other Details

This adware connects to the following possibly malicious URL:

  • {BLOCKED}80.169
  • {BLOCKED}9.79
  • {BLOCKED}.100.39
  • {BLOCKED}9.74
  • {BLOCKED}3.147.188

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.700

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\Sysinternals
    • PsKill
  • In HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion
    • MCD

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\Sysinternals\PsKill
    • EulaAccepted = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MCD
    • Enable = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MCD
    • SwapSync = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MCD
    • Palettized Formats = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MCD
    • IO Priority = "0"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MCD
    • Use Generic Stencil = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\MCD
    • Enumerate as ICD = "0"

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.
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/sdan.exe
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/sdapk.exe
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/sdaspwn.exe
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/licence.txt
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/excel-urlaubs-und-absenzkalender_small_17.png
  • %System Root%/DOCUME~1/Wilbert/LOCALS~1/Temp/dvFerienKalender_V5.exe
  • %User Temp%\is-5A82N.tmp\dvFerienKalender_V5.tmp
  • %User Temp%\is-IV8UJ.tmp\_isetup\_RegDLL.tmp
  • %User Temp%\is-IV8UJ.tmp\_isetup\_shfoldr.dll

Step 5

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.
  • %User Temp%\is-5A82N.tmp
  • %User Temp%\is-IV8UJ.tmp
  • %User Temp%\is-IV8UJ.tmp\_isetup

Step 6

Scan your computer with your Trend Micro product to delete files detected as ADW_DLGUIDE. 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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