Ransom.MSIL.HAVANACRYPT.THFACBB
MSIL/Filecoder.ARP trojan(NOD32), Gen:Variant.Bulz.33740(BITDEFENDER)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It connects to certain websites to send and receive information.
It avoids encrypting files with the following file extensions.
TECHNICAL DETAILS
421,888 bytes
EXE
No
Downloads files, Drops files, Connects to URLs/IPs, Terminates processes, Steals information
Arrival Details
This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
Autostart Technique
This Ransomware adds the following registry entries to enable its automatic execution at every system startup:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
GoogleUpdate = %ProgramData%\{Random Characters}.exe
It drops the following file(s) in the Windows User Startup folder to enable its automatic execution at every system startup:
- %User Startup%\{Random Characters}.exe → copy of itself
- %User Startup%\vallo.bat → Disables Task Manager
(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows 2003(32-bit), XP and 2000(32-bit), or C:\Users\{user name}\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit), 10(64-bit).)
Process Termination
This Ransomware terminates the following processes if found running in the affected system's memory:
- agntsvc
- agntsvc
- axlbridge
- ccevtmgr
- ccsetmgr
- contoso1
- culserver
- culture
- dbeng50
- dbeng8
- dbsnmp
- dbsrv12
- dbsrv12
- defwatch
- defwatch
- encsvc
- excel
- fdlauncher
- firefoxconfig
- httpd
- infopath
- isqlplussvc
- msaccess
- msdtc
- msdtsrvr
- msftesql
- msmdsrv
- mspub
- mssql
- mssqlserver
- mydesktopqos
- mydesktopservice
- mysqld
- mysqld-nt
- mysqld-opt
- ocautoupds
- ocomm
- ocssd
- onenote
- oracle
- outlook
- powerpnt
- qbcfmonitorservice
- qbcfmonitorservice
- qbdbmgr
- qbidpservice
- qbidpservice
- qbupdate
- qbw32
- quickboooks.fcs
- ragui
- rtvscan
- rtvscan
- savroam
- sqbcoreservice
- sqladhlp
- sqladhlp
- sqlagent
- sqlagent
- sqlbrowser
- sqlbrowser
- sqlserv
- sqlserveragent
- sqlservr
- sqlwriter
- sqlwriter
- steam
- supervise
- synctime
- tbirdconfig
- thebat
- thebat64
- thunderbird
- tomcat6
- tomcat6
- vds
- visio
- vmware-converter
- vmware-converter
- vmware-usbarbitator64
- vmware-usbarbitator64
- winword
- winword
- word
- wordpad
- wrapper
- wxserver
- wxserverview
- xfssvccon
- zhudongfangyu
- zhundongfangyu
Download Routine
This Ransomware connects to the following URL(s) to download its component file(s):
- http://{BLOCKED}.{BLOCKED}.128.33/2.txt
Information Theft
This Ransomware gathers the following data:
- Username
- Token
- Date
- RAM information
- OS Information
Stolen Information
This Ransomware sends the gathered information via HTTP POST to the following URL:
- http://{BLOCKED}.{BLOCKED}.128.33/index.php
Other Details
This Ransomware connects to the following website to send and receive information:
- http://{BLOCKED}.{BLOCKED}.128.33/ham.php
It does the following:
- It terminates itself if it finds the following virtual machine/sandbox artifacts in the affected system:
- %System%\Drivers\Vmmouse.sys
- %System%\Drivers\vm3dgl.dll
- %System%\Drivers\vmdum.dll
- %System%\Drivers\vm3dver.dll
- %System%\Drivers\vmtray.dll
- %System%\Drivers\VMToolsHook.dll
- %System%\Drivers\vmmousever.dll
- %System%\Drivers\vmhgfs.dll
- %System%\Drivers\vmGuestLib.dll
- %System%\Drivers\VmGuestLibJava.dll
- %System%\Driversvmhgfs.dll
- %System%\Drivers\VBoxMouse.sys
- %System%\Drivers\VBoxGuest.sys
- %System%\Drivers\VBoxSF.sys
- %System%\Drivers\VBoxideo.sys
- %System%\vboxdisp.dll
- %System%\voxhook.dll
- %System%\vboxmrxnp.dll
- %System%\vboxogl.dll
- %System%\vboxoglarraysp.dll
- %System%\vboxoglcrutil.dll
- %System%\vboxoglerrorspu.dll
- %System%\vboxoglfeedbackspu.dll
- %System%\vboxoglpackspu.dll
- %System%\vboxoglpassthroughspu.dll
- %System%\vboxservice.exe
- %System%\vboxtray.exe
- %System%\VBoxControl.exe
- It terminates itself if services found running in the affected system:
- VMTools
- Vmhgfs
- VMMEMCTL
- Vmmouse
- Vmrawdsk
- Vmusbmouse
- Vmvss
- Vmscsi
- Vmxnet
- vmx_svga
- Vmware Tools
- Vmware Physical Disk Helper Service
- It terminates itself when executed in the following environments:
- VMware ESX,VMware GSX Server
- Standalone VMware vSphere
- VMware Wrokstation
- VMware Horizon
- VMware
- VMware vSphere
- VMware ESX Server
- Oracle VirtualBox 5.2
- It terminates itself if it finds the following processes in the affected system's memory:
- vmtoolsd.exe
- vmwaretrat.exe
- vmwareuser.exe
- vmacthlp.exe
- vboxservice.exe
- vboxtray.exe
- vbox.exe
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Ransomware Routine
This Ransomware avoids encrypting files found in the following folders:
- tmp
- winnt
- application data
- appdata
- temp
- thumb
- $recycle.bin
- system volume information
- program files
- program files (x86)
- windows
- boot
- bios
- programdata
- windows.old
- tor browser
- microsoft
- havana
- .nuget
- symbols
It appends the following extension to the file name of the encrypted files:
- .Havana
It avoids encrypting files with the following file extensions:
- .dll
- .lnk
- .sys
- .msi
- .bat
- .iso
- .Havana
SOLUTION
9.800
17.624.04
13 Jun 2022
17.625.00
14 Jun 2022
Step 1
Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:
- TROJ.Win32.TRX.XXPE50FFF057
Step 2
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 3
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 4
Delete this registry value
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\CurrentVersion\Run
- GoogleUpdate = %ProgramData%\{Random Characters}.exe
- GoogleUpdate = %ProgramData%\{Random Characters}.exe
Step 5
Search and delete these files
- {Malware Filepath}\foo.txt
- %ProgramData%\{Random Characters}.bat
- %User Startup%\{Random Characters}.exe
- %User Startup%\vallo.bat
Step 6
Scan your computer with your Trend Micro product to delete files detected as Ransom.MSIL.HAVANACRYPT.THFACBB. 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 encrypted files from backup.
Did this description help? Tell us how we did.