HackTool.Win32.Patcher.H

 Analysis by: Raymart Christian Yambot

 ALIASES:

HackTool:Win32/DllPatch!pz (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet


This Hacking Tool 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:

719,872 bytes

File Type:

DLL

Memory Resident:

No

Initial Samples Received Date:

14 Nov 2024

Payload:

Drops files, Modifies system registry, Connects to URLs/IPs

Arrival Details

This Hacking Tool 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 Hacking Tool drops the following files:

  • %All Users Profile%\Microsoft\Windows\WER\ReportArchive\NonCritical_iexplore.{Random Chacters}\Report.wer
  • %Application Data%\Microsoft\Windows\PrivacIE\index.dat
  • %Application Data%\Microsoft\Internet Explorer\DOMStore\index.dat
  • %Application Data%\Microsoft\Internet Explorer\DOMStore\SA58SA4T\www.{BLOCKED}yg [1].xml
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{GUID}.dat
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{GUID}.dat
  • %Temporary Internet Files%\Content.IE5\U90PRGHH\forum[1].php
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\style_14_common[1].css
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\style_14_widthauto[1].css
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\common[1].js
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\style_14_forum_index[1].css
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\portal[1].js
  • %Temporary Internet Files%\Content.IE5\E6P952NO\md5[1].js
  • %Temporary Internet Files%\Content.IE5\I5U7DXRH\logo[1].png
  • %Temporary Internet Files%\Content.IE5\U90PRGHH\lewei_nv[1].png
  • %Temporary Internet Files%\Content.IE5\E6P952NO\switch_width[1].png
  • %Temporary Internet Files%\Content.IE5\I5U7DXRH\pt_item[1].png
  • %Temporary Internet Files%\Content.IE5\U90PRGHH\collapsed_yes[1].gif
  • %Cookies%\{Username}.chinapyg[1].txt
  • %Cookies%\{Username}.chinapyg[2].txt
  • %Favorites%\Links\Suggested Sites.url:favicon
  • %Favorites%\Links\Suggested Sites.url

It adds the following processes:

  • %Program Files%\Internet Explorer

(Note: %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other System Modifications

This Hacking Tool adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\LinksBar\ItemCache\
0
Path = %Favorites%\Links\Suggested Sites.url

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Suggested Sites
SlicePath = %Favorites%\Links\Suggested Sites.url

It modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
AutoDetect = 0

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings\
ZoneMap
UNCAsIntranet = 0

Other Details

This Hacking Tool adds the following registry keys:

HKEY_CURRENT_USER\Software\Microsoft\
Internet Explorer\Suggested Sites

It connects to the following possibly malicious URL:

  • https://www.{BLOCKED}yg.com/forum.php = mal
  • https://www.{BLOCKED}yg.com/data/cache/style_14_common.css?h80
  • https://www.{BLOCKED}yg.com/data/cache/common.js?h80
  • https://www.{BLOCKED}yg.com/data/cache/md5.js?h80
  • https://www.{BLOCKED}yg.com/data/cache/forum.js?h80
  • https://www.{BLOCKED}yg.com/data/cache/portal.js?h80
  • https://www.{BLOCKED}yg.com/data/cache/logging.js?h80

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.783.00

SSAPI PATTERN Date:

21 Nov 2024

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

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\Microsoft\Internet Explorer\
    • Suggested Sites

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\Internet Explorer\Suggested Sites
    • SlicePath = %Favorites%\Links\Suggested Sites.url
  • In HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\LinksBar\ItemCache\0
    • Path = %Favorites%\Links\Suggested Sites.url

Step 5

Restore this modified 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.

  • RegKey: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
  • UNCAsIntranet = 0
  • UNCAsIntranet = 1
  • RegKey: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap
  • AutoDetect = 1
  • AutoDetect = 0

Step 6

Search and delete this file

[ 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.
  • %All Users Profile%\Microsoft\Windows\WER\ReportArchive\NonCritical_iexplore.{Random Chacters}\Report.wer
  • %Application Data%\Microsoft\Windows\PrivacIE\index.dat
  • %Application Data%\Microsoft\Internet Explorer\DOMStore\index.dat
  • %Application Data%\Microsoft\Internet Explorer\DOMStore\SA58SA4T\www.chinapyg[1].xml
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\RecoveryStore.{GUID}.dat
  • %AppDataLocal%\Microsoft\Internet Explorer\Recovery\High\Active\{GUID}.dat
  • %Temporary Internet Files%\Content.IE5\U90PRGHH\forum[1].php
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\style_14_common[1].css
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\style_14_widthauto[1].css
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\common[1].js
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\style_14_forum_index[1].css
  • %Temporary Internet Files%\Content.IE5\01JIXJH3\portal[1].js
  • %Temporary Internet Files%\Content.IE5\E6P952NO\md5[1].js
  • %Temporary Internet Files%\Content.IE5\I5U7DXRH\logo[1].png
  • %Temporary Internet Files%\Content.IE5\U90PRGHH\lewei_nv[1].png
  • %Temporary Internet Files%\Content.IE5\E6P952NO\switch_width[1].png
  • %Temporary Internet Files%\Content.IE5\I5U7DXRH\pt_item[1].png
  • %Temporary Internet Files%\Content.IE5\U90PRGHH\collapsed_yes[1].gif
  • %Cookies%\{Username}.chinapyg[1].txt
  • %Cookies%\{Username}.chinapyg[2].txt
  • %Favorites%\Links\Suggested Sites.url:favicon

Step 7

Scan your computer with your Trend Micro product to delete files detected as HackTool.Win32.Patcher.H. 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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