Ransom.Win32.GANDCRAB.TIOIBOCO
Trojan.MalPack.GS (Malwarebytes), Trojan:Win32/Skeeyah.A!bit (Microsoft), W32/GenKryptik.DFIY!tr (Fortinet)
Windows
Threat Type: Ransomware
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Ransomware arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It 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 arrive using one or multiple arrival methods.
It connects to certain websites to send and receive information. It takes advantage of certain vulnerabilities.
It drops files as ransom note.
TECHNICAL DETAILS
Arrival Details
This Ransomware arrives as an attachment to email messages spammed by other malware/grayware or malicious users.
It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.
It arrives via the following means:
Installation
This Ransomware drops the following files:
- %User Temp%\bxmeoengtf.bmp
- {Encrypted Folder}\{Random}-MANUAL.txt
(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, XP, and Server 2003, or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, and 8.)
It adds the following processes:
- cmd.exe /c vssadmin delete shadows /all /quiet
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- AversSucksForever
Process Termination
This Ransomware terminates the following processes if found running in the affected system's memory:
- agntsvc.exe
- dbeng50.exe
- dbsnmp.exe
- encsvc.exe
- excel.exe
- firefoxconfig.exe
- infopath.exe
- isqlplussvc.exe
- msaccess.exe
- msftesql.exe
- mspub.exe
- mydesktopqos.exe
- mydesktopservice.exe
- mysqld-nt.exe
- mysqld-opt.exe
- mysqld.exe
- ocautoupds.exe
- ocomm.exe
- ocssd.exe
- onenote.exe
- oracle.exe
- outlook.exe
- powerpnt.exe
- sqbcoreservice.exe
- sqlagent.exe
- sqlbrowser.exe
- sqlservr.exe
- sqlwriter.exe
- steam.exe
- synctime.exe
- tbirdconfig.exe
- thebat.exe
- thebat64.exe
- thunderbird.exe
- visio.exe
- winword.exe
- wordpad.exe
- xfssvccon.exe
Information Theft
This Ransomware gathers the following data:
- Username
- Computer Name
- Network Information
- System Language
- Machine Keyboard Layout
- OS Version and Platform
- AV Products Installed
- Processor Information
- IP Address
- Drives Information (Nerwork or Local)
- Ransom ID
- GandCrab Internal Info:
- id
- sub_id
- version
- action
Other Details
This Ransomware connects to the following website to send and receive information:
- http://{URL}/{string1}/{string2}/{string3}.{string4}
- Where URL is equal to the following:
- www.{BLOCKED}e.com
- www.{BLOCKED}rsport.biz
- www.{BLOCKED}thotelbasel.com
- www.{BLOCKED}tarium.org
- www.{BLOCKED}odge.com
- www.{BLOCKED}otelzurich.com
- www.{BLOCKED}enthaus.com
- www.{BLOCKED}e-hotel.com
- www.{BLOCKED}ecouronne.com
- www.{BLOCKED}emontblanc.com
- www.{BLOCKED}uewiesen.com
- www.{BLOCKED}ere-locarno.com
- www.{BLOCKED}us-toni.com
- www.{BLOCKED}sel.com
- www.{BLOCKED}iinfissi.com
- www.{BLOCKED}acolline.com
- www.{BLOCKED}t.com
- www.{BLOCKED}l-adelboden.com
- www.{BLOCKED}o.net
- www.{BLOCKED}esurcoux.net
- www.{BLOCKED}egas-avocats.net
- www.{BLOCKED}e-d-hote-chez-fleury.com
- www.{BLOCKED}ge.com
- www.{BLOCKED}n.org
- www.{BLOCKED}h.mehrmarken.net
- www.{BLOCKED}iel.com
- www.{BLOCKED}otel.com
- www.{BLOCKED}entalchalet.com
- www.{BLOCKED}z.com
- www.{BLOCKED}ok.com
- www.{BLOCKED}ht.net
- www.{BLOCKED}gs-hotel.com
- www.{BLOCKED}ay.biz
- www.{BLOCKED}-schwyn.mehrmarken.net
- www.{BLOCKED}le.net
- www.{BLOCKED}a.frasershospitality.com
- www.{BLOCKED}golf.com
- www.{BLOCKED}elier.net
- www.{BLOCKED}nau.biz
- www.{BLOCKED}ckhoteldavos.com
- www.{BLOCKED}neva.com
- www.{BLOCKED}ck.biz
- www.{BLOCKED}blumental.com
- www.{BLOCKED}zermatt.com
- www.{BLOCKED}lbanareal.com
- www.{BLOCKED}hery.com
- www.{BLOCKED}reirosen.net
- www.{BLOCKED}arinet.com
- www.{BLOCKED}arni-battello.com
- www.{BLOCKED}lanis.com
- www.{BLOCKED}ido-lugano.com
- www.{BLOCKED}lden.com
- www.{BLOCKED}otonde.com
- www.{BLOCKED}ruite.com
- www.{BLOCKED}eisshorn.com
- www.{BLOCKED}moz.com
- www.{BLOCKED}taad.com
- www.{BLOCKED}s.com
- www.{BLOCKED}mmermann.net
- www.{BLOCKED}orp.link
- www.{BLOCKED}orp.name
- www.{BLOCKED}fs.net
- www.{BLOCKED}egensberg.com
- www.{BLOCKED}taine.com
- www.{BLOCKED}une.net
- www.{BLOCKED}le-haus.org
- www.{BLOCKED}nt-hubert.com
- www.{BLOCKED}emond.com
- www.{BLOCKED}hof.com
- www.{BLOCKED}hoteladmiral.com
- www.{BLOCKED}e.com
- www.{BLOCKED}e-residenza.com
- www.{BLOCKED}inhostel.com
- www.{BLOCKED}alzermatt.com
- www.{BLOCKED}oiffure.ch
- www.{BLOCKED}.org
- www.{BLOCKED}els.com
- www.{BLOCKED}adelcentro.net
- www.{BLOCKED}paradis.com
- www.{BLOCKED}m.com
- www.{BLOCKED}uus.com
- www.{BLOCKED}fure.net
- www.{BLOCKED}-crosets.com
- www.{BLOCKED}coiffure-geneve.net
- www.{BLOCKED}nerhof.com
- www.{BLOCKED}delberg.com
- www.{BLOCKED}sprungzimmer24.com
- www.{BLOCKED}rhotel.com
- www.{BLOCKED}n.com
- www.{BLOCKED}ach.com
- www.{BLOCKED}stophesa.com
- www.{BLOCKED}ellness.com
- www.{BLOCKED}el.com
- www.{BLOCKED}and-garage.mehrmarken.net
- www.{BLOCKED}ledore.com
- www.{BLOCKED}rtia.org
- www.{BLOCKED}x.net
- www.{BLOCKED}larus.com
- www.{BLOCKED}od.com
- Where string1 is equal to the following:
- wp-content
- static
- content
- includes
- data
- uploads
- news
- Where string2 is equal to the following:
- images
- pictures
- image
- graphic
- assets
- pics
- imgs
- tmp
- Where string3 is equal to the combination of the following:
- im
- de
- ka
- ke
- am
- es
- so
- fu
- se
- da
- he
- ru
- me
- mo
- th
- zu
- Where string4 is equal to the following:
- jpg
- png
- gif
- bmp
It does the following:
- Avoids encrypting files with the following extensions:
- ani
- cab
- cpl
- cur
- diagcab
- diagpkg
- dll
- drv
- lock
- hlp
- ldf
- icl
- icns
- ico
- ics
- lnk
- key
- idx
- mod
- mpa
- msc
- msp
- msstyles
- msu
- nomedia
- ocx
- prf
- rom
- rtp
- scr
- shs
- spl
- sys
- theme
- themepack
- exe
- bat
- cmd
- gandcrab
- KRAB
- CRAB
- zerophage_i_like_your_pictures
- {Generated random characters appended on encrypted file names}
- It deletes shadow copies.
- It checks for the presence of the following antivirus and security applications:
- smc.exe
- AVP.EXE
- ekrn.exe
- avgnt.exe
- ashDisp.exe
- NortonAntiBot.exe
- Mcshield.exe
- avengine.exe
- cmdagent.exe
- persfw.exe
- pccpfw.exe
- fsguiexe.exe
- cfp.exe
- msmpeng.exe
- It encrypts files in all available drives and shared folders
It takes advantage of the following vulnerabilities:
Ransomware Routine
This Ransomware avoids encrypting files with the following strings in their file name:
- desktop.ini
- autorun.inf
- ntuser.dat
- iconcache.db
- bootsect.bak
- boot.ini
- ntuser.dat.log
- thumbs.db
- ntldr
- NTDETECT.COM
- Bootfont.bin
- -MANUAL.txt
It avoids encrypting files found in the following folders:
- %Application Data%
- %All Users Profile%
- %User Profile%
- %ProgramFiles%
- %System Root%
- \{Computer Name}
- %Public%
(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, and 8.. %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000, XP, and Server 2003, or C:\ProgramData on Windows Vista, 7, and 8. . %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista, 7, and 8.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %Public% is the folder that serves as a repository of files or folders common to all users, which is usually C:\Users\Public in Windows Vista, 7, and 8.)
It appends the following extension to the file name of the encrypted files:
- .{Random}
It drops the following file(s) as ransom note:
SOLUTION
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
Restart in Safe Mode
Step 4
Search and delete these files
- %User Temp%\bxmeoengtf.bmp
- {Encrypted Folder}\{Random}-MANUAL.txt
Step 5
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Ransom.Win32.GANDCRAB.TIOIBOCO. 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 6
Scan your computer with your Trend Micro product to delete files detected as Ransom.Win32.GANDCRAB.TIOIBOCO. 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.
Step 8
Scan your computer with your Trend Micro product to clean files detected as Ransom.Win32.GANDCRAB.TIOIBOCO. 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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