Analysis by: John Donnie Celestre
ALIASES:

Generic.Ransom.EvilLocker.1DFAE1BA (BITDEFENDER); a variant of Win64/Filecoder.U trojan (NOD32)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size: 254,976 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 31 May 2019

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 adds the following processes:

  • vssadmin delete shadows /all /quiet

Process Termination

This Ransomware terminates the following services if found on the affected system:

  • MsDtsServer100
  • MsDtsServer130
  • MSSQL
  • MSSQLFDLauncher
  • MSSQLSERVER
  • MSSQLServerADHelper100
  • MSSQLServerOLAPService
  • postgresql-x64-9.4
  • ReportServer
  • sql-x64-9.4
  • SQLAgent
  • SQLBrowser
  • SQLSERVERAGENT
  • SQLTELEMETRY
  • SQLWriter
  • SSISTELEMETRY130
  • TMBMServer
  • UniFi
  • vmicguestinterface
  • vmicheartbeat
  • vmickvpexchange
  • vmicrdvstorflt
  • vmicshutdown
  • vmictimesync
  • vmicvss
  • vmms

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

  • agntsvc.exe
  • dbeng50.exe
  • dbsnmp.exe
  • encsvc.exe
  • excel.exe
  • fdhost.exe
  • fdlauncher.exe
  • firefoxconfig.exe
  • infopath.exe
  • msaccess.exe
  • MsDtsSrvr.exe
  • msftesql.exe
  • msmdsrv.exe
  • mspub.exe
  • mydesctopservice.exe
  • mysqld-nt.exe
  • mysqld-opt.exe
  • mysqld.exe
  • ntdbsmgr.exe
  • ocautoupds.exe
  • ocomm.exe
  • ocssd.exe
  • onenote.exe
  • oracle.exe
  • outlook.exe
  • pg_ctl.exe
  • postgres.exe
  • powerpnt.exe
  • ReportingServecesService.exe
  • ReportingServicesService.exe
  • sqbcoreservice.exe
  • SQLAGENT.EXE
  • sqlagent.exe
  • sqlbrowser.exe
  • sqlceip.exe
  • sqlserv.exe
  • sqlservr.exe
  • sqlwriter.exe
  • Ssms.exe
  • steam.exe
  • synctime.exe
  • tbirdconfig.exe
  • thebat.exe
  • thebat64.exe
  • thunderbird.exe
  • UniFi.exe
  • visio.exe
  • winword.exe
  • wordpad.exe

Other Details

This Ransomware does the following:

  • It ensures all files under the following paths are encrypted:
    • C:\\Program Files (x86)\\Microsoft SQL Server\\
    • C:\\Program Files\\Microsoft SQL Server\\
    • C:\\Program Files(x86)\\Intuit\\
    • C:\\Program Files(x86)\\MYOB\\
    • \\OB\\
  • Encrypts files and drops copies of ransom note in all local and network drives.

Ransomware Routine

This Ransomware avoids encrypting files found in the following folders:

  • C:\System Volume Information
  • C:\Windows

It appends the following extension to the file name of the encrypted files:

  • [evilcock@cock.li].EVIL

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

  • !_HOW_RECOVERY_FILES_!.txt

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

  • >>>>>>>>>>>>>>>>>>>>>>>>>>>> EVIL LOCKER <<<<<<<<<<<<<<<<<<<<<<<<<<<<
    HELLO, DEAR FRIEND!
    1. [ ALL YOUR FILES HAVE BEEN ENCRYPTED! ]
    Your files are NOT damaged! Your files are modified only. This modification is reversible.
    The only 1 way to decrypt your files is to receive the decryption program.
    2. [ HOW TO RECOVERY FILES? ]
    To receive the decryption program write to email: evilcock@cock.li
    And in subject write your ID: ID-{ID}
    We send you full instruction how to decrypt all yo}ur files.
    If we do not respond within 24 hours, write to the email: evilcock@cock.lu
    3. [ FREE DECRYPTION! ]
    Free decryption as guarantee.
    We guarantee the receipt of the decryption program after payment.
    To believe, you can give us up to 3 files that we decrypt for free.
    Files should not be important to you! (databases, backups, large excel sheets, etc.)
    >>>>>>>>>>>>>>>>>>>>>>>>>>>> EVIL LOCKER <<<<<<<<<<<<<<<<<<<<<<<<<<<<

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.144.06
FIRST VSAPI PATTERN DATE: 31 May 2019
VSAPI OPR PATTERN File: 15.145.00
VSAPI OPR PATTERN Date: 01 Jun 2019

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

Identify and terminate files detected as Ransom.Win64.EVILLOCKER.A

[ 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 4

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win64.EVILLOCKER.A. 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 5

Restore encrypted files from backup.


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