Modified by: John Anthony Banes
ALIASES:

Riskware/DownloaderGuide (Fortinet); a variant of Win32/DownloadGuide.D (NOD32)

 PLATFORM:

Windows

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

  • Threat Type: Potentially Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size: 560,192 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 22 May 2019

Arrival Details

This Potentially Unwanted Application arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be manually installed by a user.

Installation

This Potentially Unwanted Application drops the following files:

  • %User Temp%\DLG\ui\common\base\css\style.css
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\uifile.zip
  • %User Temp%\DLG\initWindow\progress.html
  • %User Temp%\DLG\ui\common\last\img\img1.png
  • %User Temp%\DLG\ui\common\progress\img\br-lb.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\js\jquery-1.10.2.min.js
  • %User Temp%\DLG\ui\common\progress\css\style.css
  • %User Temp%\DLG\ui\common\last\last.zip
  • %User Temp%\DLG\ui\common\progress\progress.zip
  • %User Temp%\DLG\ui\common\progress\img\progress.png
  • %User Temp%\DLG\ui\common\progress\js\jquery-1.10.2.min.js
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\index.html
  • %User Temp%\DLG\loadingImage\loadingImage.bmp
  • %User Temp%\DLG\ui\common\progress\img\progress-bar.png
  • %User Temp%\DLG\ui\common\progress\img\br-b.png
  • %User Temp%\DLG\ui\common\progress\img\icon.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\img\progress-bar.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\img\img1.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\img\progress.png
  • %User Temp%\DLG\ui\common\base\base.zip
  • %User Temp%\DLG\dlgres\DLG-Product-Logo.png
  • %User Temp%\DLG\initWindow\noconnection.html
  • %User Temp%\DLG\ui\common\progress\img\img1.png
  • %User Temp%\DLG\initWindow\css\style.css
  • %User Temp%\DLG\ui\common\last\js\jquery-1.10.2.min.js
  • %User Temp%\DLG\ui\common\progress\img\151.gif
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\css\style.css
  • %User Temp%\DLG\ui\common\progress\img\bar-lb.png
  • %User Temp%\DLG\ui\common\progress\img\br-bg.png
  • %User Temp%\DLG\ui\common\base\index.html
  • %User Temp%\DLG\ui\common\progress\img\bar-rb.png
  • %User Temp%\DLG\ui\common\progress\img\bar-bg.png
  • %User Temp%\DLG\ui\common\progress\img\br-rb.png
  • %User Temp%\DLG\ui\common\last\index.html
  • %User Temp%\DLG\ui\common\base\js\jquery-1.10.2.min.js
  • %User Temp%\DLG\ui\common\progress\index.html
  • %User Temp%\DLG\ui\common\last\css\style.css

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It creates the following folders:

  • %User Temp%\DLG\ui\common\base\css
  • %User Temp%\DLG\ui\common\base\js
  • %User Temp%\DLG\ui\offers
  • %User Temp%\DLG\ui\common\progress\img
  • %User Temp%\DLG\ui\common\progress
  • %User Temp%\DLG\loadingImage
  • %User Temp%\DLG\dlgres
  • %User Temp%\DLG\ui\common\progress\js
  • %User Temp%\DLG\ui\common\last\img
  • %User Temp%\DLG\ui\common\base
  • %User Temp%\DLG\ui\common
  • %User Temp%\DLG\initWindow
  • %User Temp%\DLG\initWindow\css
  • %User Temp%\DLG\ui\common\progress\css
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\js
  • %User Temp%\DLG\ui\common\last
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\img
  • %User Temp%\DLG\ui
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\css
  • %User Temp%\DLG\ui\common\last\css
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825
  • %User Temp%\DLG\ui\common\last\js

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Download Routine

This Potentially Unwanted Application saves the files it downloads using the following names:

  • {Grayware Path}\Apache_OpenOffice_4.1.6_Win_x86_install_de.exe.part
  • %User Temp%\DLG\ui\common\last\last.zip.part
  • %User Temp%\DLG\ui\common\base\base.zip.part
  • %User Temp%\DLG\ui\common\progress\progress.zip.part
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\uifile.zip.part

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other Details

This Potentially Unwanted Application connects to the following possibly malicious URL:

  • http://{BLOCKED}22.{BLOCKED}o.msecnd.net/public-source/downloadguide/computerbild/1.0/default/campaigns/product+website/ui/base.zip
  • http://{BLOCKED}22.{BLOCKED}o.msecnd.net/public-source/downloadguide/computerbild/1.0/default/campaigns/product+website/ui/computerbild-flow-5-text-en-us.zip
  • http://{BLOCKED}22.{BLOCKED}o.msecnd.net/public-source/downloadguide/computerbild/1.0/default/campaigns/product+website/ui/last.zip
  • http://{BLOCKED}22.{BLOCKED}o.msecnd.net/public-source/downloadguide/computerbild/1.0/default/campaigns/product+website/ui/progress.zip
  • http://{BLOCKED}nfigs.buzzrin.de/
  • http://{BLOCKED}nfigs.{BLOCKED}n.de/config-from-production
  • http://{BLOCKED}ssages.{BLOCKED}n.de/1/dg/3
  • https://{BLOCKED}.{BLOCKED}erbild.de/downloader/covus/data/742861/Apache_OpenOffice_4.1.6_Win_x86_install_de.exe?__dlid__=1558485845_d0d7511cbbc0fa8975c1a46b9344a5d6&_chksum_=ade19fb92b18ae8e6922e2db4cad83a1

  SOLUTION

Minimum Scan Engine: 9.850
SSAPI PATTERN File: 2.177.00
SSAPI PATTERN Date: 23 May 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Identify and terminate files detected as PUA.Win32.DownGuide.GA

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Search and delete these files

[ Learn More ]
There may be some files 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%\DLG\ui\common\base\css\style.css
  • %User Temp%\DLG\ui\common\last\last.zip.part
  • %User Temp%\DLG\ui\common\base\base.zip.part
  • %User Temp%\DLG\ui\common\progress\progress.zip.part
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\uifile.zip
  • %User Temp%\DLG\initWindow\progress.html
  • %User Temp%\DLG\ui\common\last\img\img1.png
  • %User Temp%\DLG\ui\common\progress\img\br-lb.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\js\jquery-1.10.2.min.js
  • %User Temp%\DLG\ui\common\progress\css\style.css
  • %User Temp%\DLG\ui\common\last\last.zip
  • %User Temp%\DLG\ui\common\progress\progress.zip
  • %User Temp%\DLG\ui\common\progress\img\progress.png
  • %User Temp%\DLG\ui\common\progress\js\jquery-1.10.2.min.js
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\index.html
  • %User Temp%\DLG\loadingImage\loadingImage.bmp
  • %User Temp%\DLG\ui\common\progress\img\progress-bar.png
  • %User Temp%\DLG\ui\common\progress\img\br-b.png
  • %User Temp%\DLG\ui\common\progress\img\icon.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\img\progress-bar.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\img\img1.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\img\progress.png
  • %User Temp%\DLG\ui\common\base\base.zip
  • %User Temp%\DLG\dlgres\DLG-Product-Logo.png
  • %User Temp%\DLG\initWindow\noconnection.html
  • %User Temp%\DLG\ui\common\progress\img\img1.png
  • %User Temp%\DLG\initWindow\css\style.css
  • %User Temp%\DLG\ui\common\last\js\jquery-1.10.2.min.js
  • %User Temp%\DLG\ui\common\progress\img\151.gif
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\css\style.css
  • %User Temp%\DLG\ui\common\progress\img\bar-lb.png
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\uifile.zip.part
  • %User Temp%\DLG\ui\common\progress\img\br-bg.png
  • %User Temp%\DLG\ui\common\base\index.html
  • %User Temp%\DLG\ui\common\progress\img\bar-rb.png
  • %User Temp%\DLG\ui\common\progress\img\bar-bg.png
  • %User Temp%\DLG\ui\common\progress\img\br-rb.png
  • %User Temp%\DLG\ui\common\last\index.html
  • %User Temp%\DLG\ui\common\base\js\jquery-1.10.2.min.js
  • %User Temp%\DLG\ui\common\progress\index.html
  • %User Temp%\DLG\ui\common\last\css\style.css
  • {Grayware Path}\Apache_OpenOffice_4.1.6_Win_x86_install_de.exe.part

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%\DLG\ui\common\base\css
  • %User Temp%\DLG\ui\common\base\js
  • %User Temp%\DLG\ui\offers
  • %User Temp%\DLG\ui\common\progress\img
  • %User Temp%\DLG\ui\common\progress
  • %User Temp%\DLG\loadingImage
  • %User Temp%\DLG\dlgres
  • %User Temp%\DLG\ui\common\progress\js
  • %User Temp%\DLG\ui\common\last\img
  • %User Temp%\DLG\ui\common\base
  • %User Temp%\DLG\ui\common
  • %User Temp%\DLG\initWindow
  • %User Temp%\DLG\initWindow\css
  • %User Temp%\DLG\ui\common\progress\css
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\js
  • %User Temp%\DLG\ui\common\last
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\img
  • %User Temp%\DLG\ui
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825\css
  • %User Temp%\DLG\ui\common\last\css
  • %User Temp%\DLG\ui\offers\1522ef138ba104249c3934a80811f825
  • %User Temp%\DLG\ui\common\last\js

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.DownGuide.GA. 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 the following Trend Micro Support pages for more information:


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