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PUA.Win32.VKontakteDJ.AH

February 20, 2020
 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 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.

  TECHNICAL DETAILS

File Size:

2,002,944 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

20 Feb 2020

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.

Installation

This Potentially Unwanted Application adds the following processes:

  • "cscript.exe" %User Temp%\is-L8EN5.tmp\info.js
  • "schtasks.exe" /Create /TN VKDJ /SC ONLOGON /TR "%All Users Profile%\VkontakteDJ\VkontakteDJ.exe /H" /F /DELAY 0001:00 /RL HIGHEST

(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).. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). )

It creates the following folders:

  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ
  • %User Temp%\is-L8EN5.tmp\_isetup
  • %All Users Profile%\VkontakteDJ

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %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 System Modifications

This Potentially Unwanted Application deletes the following files:

  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Vkontakte DJ.url
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Vkontakte DJ.pif
  • %Desktop%\Vkontakte DJ.url
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Vkontakte DJ.pif
  • %Desktop%\Vkontakte DJ.pif
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Uninstall Vkontakte DJ.url
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Uninstall Vkontakte DJ.pif
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Vkontakte DJ.url

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Owner = "\xe8\x08\x00\x00\x94\x91\xc0_{\x89\xd5\x01"

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
SessionHash = "\xf4\xa2\xc5\xf9\x13g\x85x\xeb\xf9sk\x03\xb6G3\x07\x80\xd19O\x15\xabd\xfbO8\xd0p(S"

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
Sequence = "1"

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
RegFiles0000 = "\x00"

HKEY_CURRENT_USER\Software\Microsoft\
RestartManager\Session0000
RegFilesHash = "{random characters}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
Inno Setup: Setup Version = "6.0.2 (u)"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
Inno Setup: App Path = "%All Users Profile%\VkontakteDJ"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
InstallLocation = "%All Users Profile%\VkontakteDJ"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
Inno Setup: Icon Group = "VkontakteDJ"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
Inno Setup: User = "{username}"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
Inno Setup: Language = "english"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
DisplayName = "Vkontakte DJ"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
UninstallString = "%All Users Profile%\VkontakteDJ\unins000.exe"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
QuietUninstallString = "%All Users Profile%\VkontakteDJ\unins000.exe /SILENT"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
DisplayVersion = "3.002"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
Publisher = "Vkontakte.DJ"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
URLInfoAbout = "http://{BLOCKED}j.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
HelpLink = "http://{BLOCKED}j.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
URLUpdateInfo = "http://{BLOCKED}j.com"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
NoModify = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
NoRepair = "1"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
InstallDate = "20191023"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
MajorVersion = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
MinorVersion = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
VersionMajor = "3"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
VersionMinor = "2"

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\
Microsoft\Windows\CurrentVersion\
Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
EstimatedSize = "2606"

Dropping Routine

This Potentially Unwanted Application drops the following files:

  • %User Temp%\is-L8EN5.tmp\7za.exe
  • %User Temp%\is-L8EN5.tmp\info.js
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Vkontakte DJ.lnk
  • %User Temp%\is-L8EN5.tmp\Logo Y.bmp
  • %User Temp%\is-L8EN5.tmp\idp.dll
  • %Desktop%\Vkontakte DJ.lnk
  • %All Users Profile%\VkontakteDJ\unins000.dat
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Vkontakte DJ.lnk
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Uninstall Vkontakte DJ.lnk
  • %All Users Profile%\VkontakteDJ\is-ULTIP.tmp
  • %All Users Profile%\VkontakteDJ\unins000.exe

(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).. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). . %Desktop% is the current user's desktop, which is usually C:\Documents and Settings\{User Name}\Desktop on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\Desktop on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

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

Identify and terminate files detected as PUA.Win32.VKontakteDJ.AH

[ 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 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\Microsoft\RestartManager\Session0000
    • Owner = "\xe8\x08\x00\x00\x94\x91\xc0_{\x89\xd5\x01"
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
    • SessionHash = "\xf4\xa2\xc5\xf9\x13g\x85x\xeb\xf9sk\x03\xb6G3\x07\x80\xd19O\x15\xabd\xfbO8\xd0p(S"
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
    • Sequence = "1"
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
    • RegFiles0000 = "\x00"
  • In HKEY_CURRENT_USER\Software\Microsoft\RestartManager\Session0000
    • RegFilesHash = "{random characters}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • Inno Setup: Setup Version = "6.0.2 (u)"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • Inno Setup: App Path = "%All Users Profile%\VkontakteDJ"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • InstallLocation = "%All Users Profile%\VkontakteDJ"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • Inno Setup: Icon Group = "VkontakteDJ"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • Inno Setup: User = "{username}"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • Inno Setup: Language = "english"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • DisplayName = "Vkontakte DJ"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • UninstallString = "%All Users Profile%\VkontakteDJ\unins000.exe"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • QuietUninstallString = "%All Users Profile%\VkontakteDJ\unins000.exe /SILENT"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • DisplayVersion = "3.002"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • Publisher = "Vkontakte.DJ"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • URLInfoAbout = "http://{BLOCKED}j.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • HelpLink = "http://{BLOCKED}j.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • URLUpdateInfo = "http://{BLOCKED}j.com"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • NoModify = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • NoRepair = "1"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • InstallDate = "20191023"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • MajorVersion = "3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • MinorVersion = "2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • VersionMajor = "3"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • VersionMinor = "2"
  • In HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{AD4B77CC-62D4-4FDE-85B2-579927F7647B}_is1
    • EstimatedSize = "2606"

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.
  • %User Temp%\is-L8EN5.tmp\7za.exe
  • %User Temp%\is-L8EN5.tmp\info.js
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Vkontakte DJ.lnk
  • %User Temp%\is-L8EN5.tmp\Logo Y.bmp
  • %User Temp%\is-L8EN5.tmp\idp.dll
  • %Desktop%\Vkontakte DJ.lnk
  • %All Users Profile%\VkontakteDJ\unins000.dat
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Vkontakte DJ.lnk
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Uninstall Vkontakte DJ.lnk
  • %All Users Profile%\VkontakteDJ\is-ULTIP.tmp
  • %All Users Profile%\VkontakteDJ\unins000.exe

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.
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ
  • %User Temp%\is-L8EN5.tmp\_isetup
  • %All Users Profile%\VkontakteDJ

Step 6

Scan your computer with your Trend Micro product to delete files detected as PUA.Win32.VKontakteDJ.AH. 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:

Step 7

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Vkontakte DJ.url
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Vkontakte DJ.pif
  • %Desktop%\Vkontakte DJ.url
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Vkontakte DJ.pif
  • %Desktop%\Vkontakte DJ.pif
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Uninstall Vkontakte DJ.url
  • %All Users Profile%\Microsoft\Windows\Start Menu\Programs\VkontakteDJ\Uninstall Vkontakte DJ.pif
  • %Application Data%\Microsoft\Internet Explorer\Quick Launch\Vkontakte DJ.url


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