Arrival Details
This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
This malware arrives via the following means:
Installation
This Trojan drops a copy of itself in the following folders using different file names:
- %Windows%\IME\lliltbg.exe (slightly modified copy)
- %User Temp%\{random numbers}\TemporaryFile\TemporaryFile
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %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 drops the following copies of itself into the affected system and executes them:
- %Windows%\lggescur\lliltbg.exe (Modified Copy)
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It terminates the execution of the copy it initially executed and executes the copy it drops instead.
Autostart Technique
This Trojan adds and runs the following services:
- Service Name: {random characters}
Description: {random characters}
Path to executable: {Malware path and filename}
Other System Modifications
This Trojan modifies the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.bat
(Default) = txtfile
(Note: The default value data of the said registry entry is batfile.)
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.cmd
(Default) = txtfile
(Note: The default value data of the said registry entry is cmdfile.)
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.js
(Default) = txtfile
(Note: The default value data of the said registry entry is JSFile.)
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.vbs
(Default) = txtfile
(Note: The default value data of the said registry entry is VBSFile.)
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.VBE
(Default) = txtfile
(Note: The default value data of the said registry entry is VBEFile.)
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.reg
(Default) = txtfile
(Note: The default value data of the said registry entry is regfile.)
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.ps1
(Default) = txtfile
(Note: The default value data of the said registry entry is Microsoft.PowerShellScript.1.)
Process Termination
This Trojan terminates the following services if found on the affected system:
- SharedAccess
- MpsSvc
- WinDefend
- wuauserv
Dropping Routine
This Trojan drops the following files:
- Mimikatz:
- %Windows%\lkbcceulc\Corporate\vfshost.exe
- %Windows%\lkbcceulc\Corporate\mimidrv.sys
- %Windows%\lkbcceulc\Corporate\mimilib.dll
- %Windows%\lkbcceulc\Corporate\log.txt
- Port Scanner:
- %Windows%\lkbcceulc\lufctctlt\heufwumyi.exe
- %Windows%\lkbcceulc\lufctctlt\kekzurucp.exe
- %Windows%\lkbcceulc\lufctctlt\Packet.dll
- %Windows%\lkbcceulc\lufctctlt\wpcap.dll
- %Windows%\lkbcceulc\lufctctlt\Result.txt
- %Windows%\lkbcceulc\lufctctlt\Scant.txt
- %Windows%\lkbcceulc\lufctctlt\ip.txt
- EternalBlue, DoublePulsar and Downloader payload:
- %Windows%\lkbcceulc\UnattendGC\AppCapture32.dll (Malware downloader for 32-bit systems)
- %Windows%\lkbcceulc\UnattendGC\AppCapture64.dll (Malware downloader for 64-bit systems)
- %Windows%\lkbcceulc\UnattendGC\docmicfg.xml
- %Windows%\lkbcceulc\UnattendGC\schoedcl.xml
- %Windows%\lkbcceulc\UnattendGC\Shellcode.ini
- %Windows%\lkbcceulc\UnattendGC\specials
- %Windows%\lkbcceulc\UnattendGC\spoolsrv.xml
- %Windows%\lkbcceulc\UnattendGC\svschost.xml
- %Windows%\lkbcceulc\UnattendGC\vimpcsvc.xml
- %Windows%\lkbcceulc\UnattendGC\specials\cnli-1.dll
- %Windows%\lkbcceulc\UnattendGC\specials\coli-0.dll
- %Windows%\lkbcceulc\UnattendGC\specials\crli-0.dll
- %Windows%\lkbcceulc\UnattendGC\specials\docmicfg.exe
- %Windows%\lkbcceulc\UnattendGC\specials\docmicfg.xml
- %Windows%\lkbcceulc\UnattendGC\specials\exma-1.dll
- %Windows%\lkbcceulc\UnattendGC\specials\libeay32.dll
- %Windows%\lkbcceulc\UnattendGC\specials\libxml2.dll
- %Windows%\lkbcceulc\UnattendGC\specials\posh-0.dll
- %Windows%\lkbcceulc\UnattendGC\specials\schoedcl.exe
- %Windows%\lkbcceulc\UnattendGC\specials\schoedcl.xml
- %Windows%\lkbcceulc\UnattendGC\specials\spoolsrv.exe
- %Windows%\lkbcceulc\UnattendGC\specials\spoolsrv.xml
- %Windows%\lkbcceulc\UnattendGC\specials\ssleay32.dll
- %Windows%\lkbcceulc\UnattendGC\specials\svschost.exe
- %Windows%\lkbcceulc\UnattendGC\specials\svschost.xml
- %Windows%\lkbcceulc\UnattendGC\specials\tibe-2.dll
- %Windows%\lkbcceulc\UnattendGC\specials\trch-1.dll
- %Windows%\lkbcceulc\UnattendGC\specials\trfo-2.dll
- %Windows%\lkbcceulc\UnattendGC\specials\tucl-1.dll
- %Windows%\lkbcceulc\UnattendGC\specials\ucl.dll
- %Windows%\lkbcceulc\UnattendGC\specials\vimpcsvc.exe
- %Windows%\lkbcceulc\UnattendGC\specials\vimpcsvc.xml
- %Windows%\lkbcceulc\UnattendGC\specials\xdvl-0.dll
- %Windows%\lkbcceulc\UnattendGC\specials\zlib1.dll
- %Windows%\lkbcceulc\UnattendGC\Logs\{IP Address}.txt
- Copies of configuration (XML) files:
- %Windows%\lggescur\svschost.xml
- %Windows%\lggescur\spoolsrv.xml
- %Windows%\lggescur\vimpcsvc.xml
- %Windows%\lggescur\docmicfg.xml
- %Windows%\lggescur\schoedcl.xml
- Coinminer:
- %Windows%\Temp\lfctrclhh\rucuce.exe
- %Windows%\Temp\lfctrclhh\config.json
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
Download Routine
This Trojan connects to the following website(s) to download and execute a malicious file:
- http://wiu.{BLOCKED}xk.me/download.exe
It saves the files it downloads using the following names:
Other Details
This Trojan connects to the following URL(s) to get the affected system's IP address:
- http://{BLOCKED}9.{BLOCKED}8.com
- https://{BLOCKED}ig.me
- http://v4.{BLOCKED}est.com/api/myip.php
It connects to the following website to send and receive information:
- http://wiu.{BLOCKED}xk.me:16666 - for reporting
- http://uio.{BLOCKED}b.se:63145/cfg.ini - config containing updated Download URL, Mining pool address and report URL.
- http://qie.{BLOCKED}xk.me:63145/cfg.ini - config containing updated Download URL, Mining pool address and report URL.
It does the following:
- It denies access to hosts file by executing the ff. commands:
- cacls %System%\drivers\etc\hosts /T /D users
- cacls %System%\drivers\etc\hosts /T /D administrators
- cacls %System%\drivers\etc\hosts /T /D SYSTEM
- It disables executing the following applications by adding the following registry entries:
- HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{Application Name}
- Debugger = %System%\svchost.exe
Where {Application Name} are as follows:- at.exe
- bitsadmin.exe
- cacls.exe
- certutil.exe
- cscript.exe
- icacls.exe
- magnify.exe
- mshta.exe
- netsh.exe
- perfmon.exe
- powershell.exe
- reg.exe
- regini.exe
- Regsvr32.exe
- rundll32.exe
- schtasks.exe
- sethc.exe
- takeown.exe
- taskkill.exe
- WinSAT.exe
- WmiPrvSE.exe
- wscript.exe
- It executes the following network shell commands:
- netsh ipsec static add filter filterlist=BastardsList srcaddr=any dstaddr=Me dstport=135 protocol=TCP
- netsh ipsec static add filter filterlist=BastardsList srcaddr=any dstaddr=Me dstport=139 protocol=TCP
- netsh ipsec static add filter filterlist=BastardsList srcaddr=any dstaddr=Me dstport=445 protocol=TCP
- netsh ipsec static add filteraction name=BastardsList action=block
- netsh ipsec static add policy name=Bastards description=FuckingBastards
- netsh ipsec static add rule name=FuckingBastards policy=Bastards filterlist=BastardsList filteraction=BastardsList
- netsh ipsec static set policy name=Bastards assign=y
- netsh firewall set opmode mode=disable
- netsh Advfirewall set allprofiles state off
- It executes its EternalBlue/DoublePulsar components using the ff. parameters:
- %Windows%\lkbcceulc\UnattendGC\specials\vimpcsvc.exe --TargetIp {Target IP Address} --TargetPort 445 --NetworkTimeout 60 --Protocol SMB --OutConfig %Windows%\lkbcceulc\UnattendGC\Logs\{Target IP Address}.xml
- %Windows%\lkbcceulc\UnattendGC\specials\svschost.exe --NetworkTimeout 60 --TargetIp 1.1.1.1 --TargetPort 445 --OutputFile %Windows%\lkbcceulc\UnattendGC\Shellcode.ini --Protocol SMB --Architecture x64 --Funciton OutputInstall
- It executes its Mimikatz component using the ff. parameters:
- %Windows%\lkbcceulc\Corporate\vfshost.exe privilege::debug sekurlsa::logonpasswords exit >> %Windows%\lkbcceulc\Corporate\log.txt
- It executes its Port scanner components using the ff. parameters:
- %Windows%\lkbcceulc\lufctctlt\heufwumyi.exe -p 80 222.186.128.1-222.186.255.255 --rate=1024 -oJ %Windows%\lkbcceulc\lufctctlt\Scant.txt
- %Windows%\lkbcceulc\lufctctlt\heufwumyi.exe -iL %Windows%\lkbcceulc\lufctctlt\ip.txt -oJ %Windows%\lkbcceulc\lufctctlt\Result.txt --open --rate 4096 -p 445
- %Windows%\lkbcceulc\lufctctlt\heufwumyi.exe -iL %Windows%\lkbcceulc\lufctctlt\ip.txt -oJ %Windows%\lkbcceulc\lufctctlt\Result.txt --open --rate 4096 -p 7001
- It terminates and disables services by executing the ff. commands:
- net stop SharedAccess
- net stop MpsSvc
- net stop WinDefend
- net stop wuauserv
- sc config MpsSvc start= disabled
- sc config SharedAccess start= disabled
- sc config WinDefend start= disabled
- sc config wuauserv start= disabled
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.. %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
It takes advantage of the following vulnerabilities:
It adds the following scheduled tasks:
- Task Name: pztwfzuil
Trigger: Repeat every 1 minute indefinetely.
Task to be Run: %Windows%\IME\{malware name}.exe
(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)
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
Remove the malware/grayware file that dropped/downloaded Trojan.Win32.BLUEROH.RPF. (Note: Please skip this step if the threat(s) listed below have already been removed.)
Step 4
Restart in Safe Mode
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To restart in Safe Mode:
• For Windows 7 and Windows Server 2008 (R2) users
- Restart your computer.
- Press F8 after the Power-On Self Test (POST) routine is done. If the Advanced Boot Options menu does not appear, try restarting and then pressing F8 several times after the POST screen is displayed.
- On the Advanced Boot Options menu, use the arrow keys to select the Safe Mode option, and then press Enter.
• For Windows 8, Windows 8.1, and Windows Server 2012 users
- Access the Charms bar by moving your mouse pointer to the upper right corner of the screen.
- Move your mouse pointer down and click Settings>Change your PC Settings.
- In the left panel, click General.
- In the right panel, scroll down to the bottom to find the Advanced startup section, then click the Restart now button and wait for the system to restart.
- In the Advanced Startup menu, click Troubleshoot>Advanced Options>Startup Settings>Restart and wait for the system to restart.
- In the Startup Settings menu, press 4 to enable safe mode.
• For Windows 10 users
- Press Windows logo key + I on your keyboard to open Settings. If that doesn't work, select the Start button, then select Settings.
- Select Update & Security > Recovery.
- Under Advanced startup, select Restart now.
- After your PC restarts to the Choose an option screen, select Troubleshoot > Advcanced options > Startup settings > Restart.
- After your PC restarts, you'll see a list og options. Select 4 or press F4 to start your PC in Safe Mode.
Step 5
Delete this registry value
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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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\{Application Name}
- Debugger = %System%\svchost.exe
To delete the registry value this malware/grayware created:
- Open Registry Editor.
» For Windows 7 and Windows Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
» For Windows 8, Windows 8.1, Windows 10, and Windows Server 2012 (R2) users, right-click on the lower-left corner of the screen, click Run, type regedit in the text box provided, and then press Enter. - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Microsoft>Windows NT>CurrentVersion>Image File Execution Options>{Application Name} - In the right panel, locate and delete the entry:
Debugger = %System%\svchost.exe - Close Registry Editor.
Step 6
Restore this modified registry value
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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_LOCAL_MACHINE\SOFTWARE\Classes\.bat
- From: (Default) = txtfile
To: (Default) = batfile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.cmd
- From: (Default) = txtfile
To: (Default) = cmdfile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.js
- From: (Default) = txtfile
To: (Default) = JSFile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.vbs
- From: (Default) = txtfile
To: (Default) = VBAFile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.VBE
- From: (Default) = txtfile
To: (Default) = VBEFile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.reg
- From: (Default) = txtfile
To: (Default) = regfile
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.ps1
- From: (Default) = txtfile
To: (Default) = Microsoft.PowerShellScript.1
To restore the registry value this malware/grayware modified:
- Open Registry Editor.
» For Windows 7 and Server 2008 (R2) users, click the Start button, type regedit in the Search input field then press Enter.
» For Windows 8, 8.1, 10, and Server 2012 (R2) users, right-click on the lower left corner of the screen, click Run, type regedit in the text box provided, and then press Enter. - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>.bat - In the right panel, locate the registry value:
(Default) = txtfile - Right-click on the value name and choose Modify. Change the value data of this entry to:
(Default) = batfile - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>.cmd - In the right panel, locate the registry value:
(Default) = txtfile - Right-click on the value name and choose Modify. Change the value data of this entry to:
(Default) = cmdfile - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>.js - In the right panel, locate the registry value:
(Default) = txtfile - Right-click on the value name and choose Modify. Change the value data of this entry to:
(Default) = JSFile - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>.vbs - In the right panel, locate the registry value:
(Default) = txtfile - Right-click on the value name and choose Modify. Change the value data of this entry to:
(Default) = VBAFile - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>.VBE - In the right panel, locate the registry value:
(Default) = txtfile - Right-click on the value name and choose Modify. Change the value data of this entry to:
(Default) = VBEFile - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>.reg - In the right panel, locate the registry value:
(Default) = txtfile - Right-click on the value name and choose Modify. Change the value data of this entry to:
(Default) = regfile - In the left panel, double-click the following:
HKEY_LOCAL_MACHINE>SOFTWARE>Classes>.ps1 - In the right panel, locate the registry value:
(Default) = txtfile - Right-click on the value name and choose Modify. Change the value data of this entry to:
(Default) = Microsoft.PowerShellScript.1 - Close Registry Editor.
Step 7
Deleting Scheduled Tasks
The following {Task Name} - {Task to be run} listed should be used in the steps identified below:
- Task Name: pztwfzuil
- Task to be Run: %Windows%\IME\{malware name}.exe
For Windows 2000, Windows XP, and Windows Server 2003:
- Open the Windows Scheduled Tasks. Click Start>Programs>Accessories>
System Tools>Scheduled Tasks. - Locate each {Task Name} values listed above in the Name column.
- Right-click on the said file(s) with the aforementioned value.
- Click on Properties. In the Run field, check for the listed {Task to be run}.
- If the strings match the list above, delete the task.
For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:
- Open the Windows Task Scheduler. To do this:
• On Windows Vista, Windows 7, and Windows Server 2008, click Start, type taskschd.msc in the Search input field, then press Enter.
• On Windows 8, Windows 8.1, and Windows Server 2012, right-click on the lower left corner of the screen, click Run, type taskschd.msc, then press Enter. - In the left panel, click Task Scheduler Library.
- In the upper-middle panel, locate each {Task Name} values listed above in the Name column.
- In the lower-middle panel, click the Actions tab. In the Details column, check for the {Task to be run} string.
- If the said string is found, delete the task.
Step 8
Disable this malware service
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- {random characters}
- Path to executable: {Malware path and filename}
Disabling a Malware Service
To disable a service:
- Open a command prompt window:
» For Windows 7 and Windows 2008 (R2) users, click the Start button, type cmd in the Search input field, and press Enter.
» For Windows 8, Windows 8.1 and Windows Server 2012 (R2) users, right-click on the lower-left corner of the screen,click Command Prompt.
» For Windows 10 users, right-click on the lower-left corner of the screen,click Run, type cmd in the text box provided, and press Enter. - At the command prompt, type the following:
NET STOP {random characters}- Path to executable: {Malware path and filename}
- Press Enter. A message should indicate that the service has been stopped successfully.
- Close the command prompt window.
Step 9
Search and delete these folders
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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%\{random numbers}
- %User Temp%\{random numbers}\TemporaryFile
- %Windows%\lggescur
- %Windows%\lkbcceulc
- %Windows%\lkbcceulc\Corporate
- %Windows%\lkbcceulc\UnattendGC
- %Windows%\lkbcceulc\UnattendGC\specials
- %Windows%\lkbcceulc\UnattendGC\Logs
- %Windows%\Temp\lfctrclhh
To delete malware/grayware/spyware folders:
For Windows 7, Windows Server 2008 (R2), Windows 8, Windows 8.1, Windows 10, and Windows Server 2012 (R2):
- Open a Windows Explorer window.
- For Windows 7 and Server 2008 (R2) users, click Start>Computer.
- For Windows 8, 8.1, 10, and Server 2012 (R2) users, right-click on the lower-left corner of the screen,then click File Explorer.
- In the Search Computer/This PC input box, type:
- %User Temp%\{random numbers}
- %User Temp%\{random numbers}\TemporaryFile
- %Windows%\lggescur
- %Windows%\lkbcceulc
- %Windows%\lkbcceulc\Corporate
- %Windows%\lkbcceulc\UnattendGC
- %Windows%\lkbcceulc\UnattendGC\specials
- %Windows%\lkbcceulc\UnattendGC\Logs
- %Windows%\Temp\lfctrclhh
- Once located, select the file then press SHIFT+DELETE to permanently delete the folder.
- Repeat steps 2-3 for the remaining folders:
- %User Temp%\{random numbers}
- %User Temp%\{random numbers}\TemporaryFile
- %Windows%\lggescur
- %Windows%\lkbcceulc
- %Windows%\lkbcceulc\Corporate
- %Windows%\lkbcceulc\UnattendGC
- %Windows%\lkbcceulc\UnattendGC\specials
- %Windows%\lkbcceulc\UnattendGC\Logs
- %Windows%\Temp\lfctrclhh
*Note: Read the following Microsoft page if these steps do not work on Windows 7 and Server 2008 (R2).
Step 10
Search and delete this file
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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.
- %Temp%\xohudmc.exe
- %Windows%\lggescur\lliltbg.exe
To manually delete a malware/grayware file from an affected system:
•For Windows 7, Windows Server 2008 (R2), Windows 8, Windows 8.1, Windows 10, and Windows Server 2012 (R2):
- Open a Windows Explorer window.
- For Windows 7 and Server 2008 (R2) users, click Start>Computer.
- For Windows 8, 8.1, 10, and Server 2012 (R2) users, right-click on the lower-left corner of the screen,then click File Explorer.
- In the Search Computer/This PC input box, type:
- %Temp%\xohudmc.exe
- %Windows%\lggescur\lliltbg.exe
- Once located, select the file then press SHIFT+DELETE to delete it.
*Note: Read the following Microsoft page if these steps do not work on Windows 7 and Windows Server 2008 (R2).
Step 11
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.Win32.BLUEROH.RPF. 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.
Step 12
Download and apply these security patches Refrain from using these products until the appropriate patches have been installed. Trend Micro advises users to download critical patches upon release by vendors.
Step 13
Scan your computer with your Trend Micro product to clean files detected as Trojan.Win32.BLUEROH.RPF. 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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