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PUA_INSTALLC.GD

April 18, 2017
 Analysis by: Byron Jon Gelera
 ALIASES:

Adware.ShouQu.5 (DrWeb); not-a-virus:RiskTool.Win32.Langsu.t (Kaspersky);

 PLATFORM:

Windows

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

  • Threat Type: Potenitally Unwanted Application

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Potenitally 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.

It executes downloaded files whose malicious routines are exhibited by the affected system.

  TECHNICAL DETAILS

File Size:

3,000,752 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

28 Mar 2017

Arrival Details

This Potenitally 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 Potenitally Unwanted Application adds the following folders:

  • %Program Files%\SLBrowser

(Note: %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.)

It drops the following file(s)/component(s):

  • %User Temp%\clear1.tmp
  • %User Temp%\clear2.tmp
  • %Program Files%\SLBrowser\Royal.exe
  • %Program Files%\SLBrowser\Royalmg.exe
  • %Program Files%\SLBrowser\SLBrowserUpdata.exe
  • %Program Files%\SLBrowser\royalser.exe
  • %Program Files%\SLBrowser\slbrowser.exe
  • %Program Files%\SLBrowser\uninst.exe
  • %Program Files%\SLBrowser\Skin\Skin.ini
  • %Program Files%\SLBrowser\Skin\baidu.ico
  • %Program Files%\SLBrowser\Skin\bear.pak
  • %Program Files%\SLBrowser\Skin\cat.pak
  • %Program Files%\SLBrowser\Skin\deepblue.pak
  • %Program Files%\SLBrowser\Skin\define.pak
  • %Program Files%\SLBrowser\Skin\download.pak
  • %Program Files%\SLBrowser\Skin\green.pak
  • %Program Files%\SLBrowser\Skin\pink.pak
  • %Program Files%\SLBrowser\Skin\simple.pak
  • %Program Files%\SLBrowser\Skin\skin.html
  • %Program Files%\SLBrowser\Skin\sky.pak
  • %Program Files%\SLBrowser\local\err.png
  • %Program Files%\SLBrowser\local\error.html
  • %Program Files%\SLBrowser\local\more.css
  • %Program Files%\SLBrowser\local\more.html
  • %Program Files%\SLBrowser\local\preedit.html
  • %Program Files%\SLBrowser\local\search.png
  • %Program Files%\SLBrowser\local\site.html
  • %Program Files%\SLBrowser\local\warning.html
  • %Program Files%\SLBrowser\local\images\1.png
  • %Program Files%\SLBrowser\local\images\10.png
  • %Program Files%\SLBrowser\local\images\11.png
  • %Program Files%\SLBrowser\local\images\12.png
  • %Program Files%\SLBrowser\local\images\13.png
  • %Program Files%\SLBrowser\local\images\14.png
  • %Program Files%\SLBrowser\local\images\15.png
  • %Program Files%\SLBrowser\local\images\16.png
  • %Program Files%\SLBrowser\local\images\2.png
  • %Program Files%\SLBrowser\local\images\3.png
  • %Program Files%\SLBrowser\local\images\4.png
  • %Program Files%\SLBrowser\local\images\5.png
  • %Program Files%\SLBrowser\local\images\6.png
  • %Program Files%\SLBrowser\local\images\7.png
  • %Program Files%\SLBrowser\local\images\8.png
  • %Program Files%\SLBrowser\local\images\9.png
  • %Program Files%\SLBrowser\local\static\css\tally.css
  • %Program Files%\SLBrowser\local\static\images\001.png
  • %Program Files%\SLBrowser\local\static\images\002.png
  • %Program Files%\SLBrowser\local\static\images\004.png
  • %Program Files%\SLBrowser\local\static\images\360dh.png
  • %Program Files%\SLBrowser\local\static\images\atb.png
  • %Program Files%\SLBrowser\local\static\images\baidu.png
  • %Program Files%\SLBrowser\local\static\images\bd.png
  • %Program Files%\SLBrowser\local\static\images\hao123.png
  • %Program Files%\SLBrowser\local\static\images\jhs.png
  • %Program Files%\SLBrowser\local\static\images\tm.png
  • %Program Files%\SLBrowser\local\static\images\tx.png
  • %Program Files%\SLBrowser\local\static\images\vip.png
  • %Program Files%\SLBrowser\local\static\images\wy.png
  • %Program Files%\SLBrowser\local\static\images\wz.png
  • %Program Files%\SLBrowser\local\static\images\xl.png
  • %Program Files%\SLBrowser\plugin\catch-1.png
  • %Program Files%\SLBrowser\plugin\catch.exe
  • %Program Files%\SLBrowser\plugin\catch.png
  • %Program Files%\SLBrowser\profile\browser.config
  • %Program Files%\SLBrowser\profile\config.js
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\SLBrowser\жÔؼ«ËÙä¯ÀÀÆ÷.lnk
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\SLBrowser\¼«ËÙä¯ÀÀÆ÷.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Launch Internet Explorer Browser.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Mozilla Firefox.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\Internet Explorer.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\Mozilla Firefox.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\¼«ËÙä¯ÀÀÆ÷.lnk
  • %User Temp%\nsxDDE3.tmp\ti.dat
  • %User Temp%\nsxDDE3.tmp\Md5dll.dll
  • %User Temp%\nsxDDE3.tmp\Re.html
  • %User Temp%\nsxDDE3.tmp\Re2.html
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\.lnk
  • %ProgramData%\360.ico
  • %System Root%\..lnk
  • %Desktop%\..lnk
  • %Application Data%\data\TEMP_CFG
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\..lnk
  • %ProgramData%\Microsoft\Windows\Start Menu\..lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\..lnk
  • %System Root%\..url
  • %User Temp%\nsxDDE3.tmp\SimpleSC.dll
  • %User Temp%\nsxDDE3.tmp\CabDLL.dll

(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.. %ProgramData% is the Program Data folder, where it usually is C:\Program Files in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData in 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.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %Desktop% is the desktop folder, where it usually is C:\Documents and Settings\{user name}\Desktop in Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\Desktop in 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 Potenitally Unwanted Application adds the following registry keys:

HKEY_CURRENT_USER\Software\slbrowser

HKEY_CURRENT_USER\Software\bag

It adds the following registry entries:

HKEY_CURRENT_USER\Software\slbrowser
uname = {Malware Name}.exe

HKEY_CURRENT_USER\Software\slbrowser
path = " %Program Files%\SLBrowser "

HKEY_CURRENT_USER\Software\slbrowser
uid = ""

HKEY_CURRENT_USER\Software\slbrowser
version = "1490685675 "

HKEY_CURRENT_USER\Software\slbrowser
install = "{Malware Path}\{Malware Name}.exe "

HKEY_CURRENT_USER\Software\slbrowser\
service
setup = "liu013"

HKEY_CURRENT_USER\Software\slbrowser\
service
servname = "RoyalSer.exe"

HKEY_CURRENT_USER\Software\slbrowser\
service
mgrname = "Royalmg.exe"

Download Routine

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

  • %User Temp%\360ini.dll
  • %User Temp%\ExtVerify.ini
  • %User Temp%\360IniVerify.ini
  • %Application Data%\soft\Inst1__3112346.exe
  • %Application Data%\soft\JQoHkc4KWCAu.exe
  • %User Temp%\lVhXkZnChJfCbJmW\vmsafegKdCdEaY23.exe
  • %User Temp%\tMvPwDjVwHaNrTyR\vmsafexBoUwPvQ28.exe
  • %User Temp%\vsRemotetemtentPl2634.ini

(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.. %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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 executes downloaded files :

  • %Application Data%\soft\Inst1__3112346.exe
  • %Application Data%\soft\JQoHkc4KWCAu.exe
  • %User Temp%\lVhXkZnChJfCbJmW\vmsafegKdCdEaY23.exe

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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.. %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.)

whose malicious routines are exhibited by the affected system.

Other Details

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

  • http://ht.{BLOCKED}g.com/route.php?package=inter&class=status&function=getinfo
  • http://freeapi.{BLOCKED}p.net/{IP Address}
  • http://ht.{BLOCKED}g.com/temp_conf/browser/liu013_conf_2.ini
  • http://ht.{BLOCKED}g.com/route.php?package=browser&class=browser_install_count&function=save&type=1&time=1490685819&mac=00-0C-29-75-EB-80&ip=103.5.6.243&sid=&hash=5189cd61d50194de0df848a968ab5886&fn=123.exe
  • http://ht.{BLOCKED}g.com/route.php?package=browser&class=limit_count_browser&function=count&type=3&mac={value}&ip={IP Address}&value=MSM0OSMxMTAjNzYjOCMxMDMjNg==&hash=d79fd7b9b28257f0e892f147380813d7
  • http://dl.{BLOCKED}e.com/gf/360ini.cab
  • http://dl.{BLOCKED}e.com/gf/360IniVerify.cab
  • http://dl.{BLOCKED}e.com/gf/360DenyPidList.cab
  • http://dl.{BLOCKED}e.com/gf/ExtVerify.cab
  • http://dl2.{BLOCKED}e.com/partner/Inst1__3112346.exe
  • http://w.x.{BLOCKED}u.com/go/mini/201/1202000631
  • http://speedxbu.{BLOCKED}u.com/shurufa/ime/d93020811b04f/JQoHkc4KWCAu.exe
  • http://dl.static.{BLOCKED}i.com/hz/IQIYIsetup_l_zxE@xp021.exe
  • https://hao.{BLOCKED}0.cn/?src=lm&ls=n580357bf91

  SOLUTION

Minimum Scan Engine:

9.850

SSAPI PATTERN File:

1.823.00

SSAPI PATTERN Date:

30 Mar 2017

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

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
    • slbrowser
  • In HKEY_CURRENT_USER\Software
    • bag

Step 4

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.
  • %Program Files%\SLBrowser

Step 5

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%\clear1.tmp
  • %User Temp%\clear2.tmp
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\SLBrowser\жÔؼ«ËÙä¯ÀÀÆ÷.lnk
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\SLBrowser\¼«ËÙä¯ÀÀÆ÷.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Launch Internet Explorer Browser.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Mozilla Firefox.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\Internet Explorer.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\Mozilla Firefox.lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\User Pinned\TaskBar\¼«ËÙä¯ÀÀÆ÷.lnk
  • %User Temp%\nsxDDE3.tmp\ti.dat
  • %User Temp%\nsxDDE3.tmp\Md5dll.dll
  • %User Temp%\nsxDDE3.tmp\Re.html
  • %User Temp%\nsxDDE3.tmp\Re2.html
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\.lnk
  • %ProgramData%\360.ico
  • %System Root%\..lnk
  • %Desktop%\..lnk
  • %Application Data%\data\TEMP_CFG
  • %ProgramData%\Microsoft\Windows\Start Menu\Programs\..lnk
  • %ProgramData%\Microsoft\Windows\Start Menu\..lnk
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\..lnk
  • %System Root%\..url
  • %User Temp%\nsxDDE3.tmp\SimpleSC.dll
  • %User Temp%\nsxDDE3.tmp\CabDLL.dll
  • %User Temp%\360ini.dll
  • %User Temp%\ExtVerify.ini
  • %User Temp%\360IniVerify.ini
  • %Application Data%\soft\Inst1__3112346.exe
  • %Application Data%\soft\JQoHkc4KWCAu.exe
  • %User Temp%\lVhXkZnChJfCbJmW\vmsafegKdCdEaY23.exe
  • %User Temp%\tMvPwDjVwHaNrTyR\vmsafexBoUwPvQ28.exe
  • %User Temp%\vsRemotetemtentPl2634.ini

Step 6

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