Ransom.Win32.CLOP.I

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 drops files as ransom note.

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.

Installation

This Ransomware drops the following files:

• {execution path}\clearnetworkdns_11-22-33.bat
• {malware path}\OwnerWin.db

It adds the following mutexes to ensure that only one of its copies runs at any one time:

• Gogogogogo#it666

Autostart Technique

This Ransomware adds and runs the following services:

• Service Name: msdtcstef
  Path to Executable: "%Windows%\wsusg.exe"

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.)

It starts the following services:

• Service Name: InformationProdecteCLP
  Service Type: 16

Process Termination

This Ransomware terminates the following processes if found running in the affected system's memory:

• mysqld-opt.exe
• xfssvccon.exe
• thebat.exe
• ocautoupds.exe
• wordpad.exe
• mysqld-nt.exe
• thebat64.exe
• excel.exe
• thunderbird.exe
• agntsvc.exeagntsvc.exe
• zoolz.exe
• msaccess.exe
• sqlwriter.exe
• WINWORD.EXE
• THEBAT.EXE
• VISIO.EXE
• MSFTESQL.EXE
• ORACLE.EXE
• MYDESKTOPQOS.EXE

Other Details

This Ransomware does the following:

• This Ransomware will delete and terminate itself:
  • If the keyboard layout is any of the following:
    • Georgian
    • Russian
    • Ukranian
    • Tajik
    • Belarusian
    • Armenian
    • Azeri
    • Uzbek
    • Kazak
    • Turkmen
  • If the default language ID is as follows:
    • Russian
• It will drop and execute "{malware path}\clearnetworkdns_11-22-33.bat" if the following processes are not found:
  • SBAMSvc.exe
  • VipreAAPSvc.exe
  • SBAMTray.exe
  • SBPIMSvc.exe
  • WRSA.exe
• Executes the following commands to edit the boot configuration data file
  • bcdedit /set {default} recoveryenabled No
  • bcdedit /set {default} bootstatuspolicy ignoreallfailures
• Executes the following commands to delete and resize the shadow copies:
  • vssadmin resize shadowstorage /for=h: /on=h: /maxsize=401MB
  • vssadmin resize shadowstorage /for=h: /on=h: /maxsize=unbounded
  • vssadmin Delete Shadows /all /quiet
• It encrypts all files except the following:
  • .Clop
  • Clopreadme.txt
  • ntldr
  • NTLDR
  • boot.ini
  • BOOT.INI
  • ntuser.ini
  • NTUSER.INI
  • AUTOEXEC.BAT
  • autoexec.bat
  • NTDETECT.COM
  • ntdetect.com
  • .dll
  • .DLL
  • .exe
  • .EXE
  • .sys
  • .SYS
  • .OCX
  • .ocx
  • .LNK
  • .lnk
  • desktop.ini
  • autorun.inf
  • ntuser.dat
  • iconcache.db
  • bootsect.bak
  • ntuser.dat.log
  • thumbs.db
  • DESKTOP.INI
  • AUTORUN.INF
  • NTUSER.DAT
  • ICONCACHE.DB
  • bootsect.bak
  • NTUSER.DAT.LOG
  • THUMBS.DB
• It encrypts files which can be found in the following locations:
  • Removable Drives
  • Fixed Drives
• the batch file "{Malware Path}\systempdisk_11_23_556_6.bat" contains the following strings:
  • @echo off
    vssadmin Delete Shadows /all /quiet
    vssadmin resize shadowstorage /for=c: /on=c: /maxsize=401MB
    vssadmin resize shadowstorage /for=c: /on=c: /maxsize=unbounded
    vssadmin resize shadowstorage /for=d: /on=d: /maxsize=401MB
    vssadmin resize shadowstorage /for=d: /on=d: /maxsize=unbounded
    vssadmin resize shadowstorage /for=e: /on=e: /maxsize=401MB
    vssadmin resize shadowstorage /for=e: /on=e: /maxsize=unbounded
    vssadmin resize shadowstorage /for=f: /on=f: /maxsize=401MB
    vssadmin resize shadowstorage /for=f: /on=f: /maxsize=unbounded
    vssadmin resize shadowstorage /for=g: /on=g: /maxsize=401MB
    vssadmin resize shadowstorage /for=g: /on=g: /maxsize=unbounded
    vssadmin resize shadowstorage /for=h: /on=h: /maxsize=401MB
    vssadmin resize shadowstorage /for=h: /on=h: /maxsize=unbounded
    vssadmin Delete Shadows /all /quiet
    bcdedit /set {default} recoveryenabled No
    bcdedit /set {default} bootstatuspolicy ignoreallfailures

Ransomware Routine

This Ransomware appends the following extension to the file name of the encrypted files:

• {file name}.{file extension}.Clop

It drops the following file(s) as ransom note:

• {all encrypted path}\CIopReadMe.txt

It leaves text files that serve as ransom notes containing the following text:

• |=|=|=|=|=|=|--> Your networks has been penetrated <--|=|=|=|=|=|=|
  All files on each host in the networks have been encrypted with a strong algorithm.
  Backups were either encrypted or deleted or backup disks were formatted.
  Shadow copies also removed,so F8 or any other methods may damage encrypted data but not recover.
  We exclusively have decryption software for your situation.
  ===No DECRYPTION software is AVAILABLE in the PUBLIC===
  - DO NOT RENAME OR MOVE the encrypted and readme files.
  !!!!!!!!!!!!!!!!!!! DO NOT RESET OR SHUTDOWN – FILES MAY BE DAMAGED!!!!!!!!!!!!!!!!!!!
  ===THIS MAY LEAD TO THE IMPOSSIBILITY OF RECOVERY OF THE CERTAIN FILES==
  ===ALL REPAIR TOOLS ARE USELESS AND CAN DESTROY YOUR FILES IRREVERSIBLY===
  If you want to restore your files write to email!!!
  [CONTACTS ARE AT THE BOTTOM OF THE SHEET] and attach 3-5 encrypted file s.
  [Less than 7 Mb each, non-archived and your files should not contain valuable information.
  [Databases,large excel sheets,backups etc].
  =-=You will receive decrypted samples and our conditions how to get the decoder=-=
  
  &&& ATTENTION &&&&
  ---YOUR WARRANTY - DECRYPTED SAMPLES---
  ---DO NOT TRY TO DECRYPT YOUR DATA USING THIRD PARTY SOFTWARE---
  ---WE DONT NEED YOUR FILES AND YOUR INFORMATION---
  
  CONTACTS E-MAILS:
  {BLOCKED}.su
  AND
  {BLOCKED}.su
  
  !!!!!!!!!!!!!!ATTENTION!!!!!!!!!!!!!!
  In the letter, type your company name and site.
  
  ^^^^The final price depends on how fast you write to us^^^
  ***Nothing personal just business***
  CIOP^_-