Ransom.Win64.EVERBE.THCOEAI

May 06, 2019
 Analysis by: John Rey Canon
 ALIASES:

Ransom.FileCryptor (Malwarebytes); A Variant Of Win64/Filecoder.Y (ESET-NOD32); Trojan.Ransom.EvilLocker.A (Ad-Aware);

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

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 deletes itself after execution. It is capable of encrypting files in the affected system.

It drops files as ransom note.

  TECHNICAL DETAILS

File Size:

246,648 bytes

File Type:

EXE

File Compression:

UPX

Memory Resident:

No

Initial Samples Received Date:

05 Mar 2019

Payload:

Terminates processes, Displays message/message boxes, Encrypts files

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.

Process Termination

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

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

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

  • cher.exe
  • fdhost.exe
  • fdlauncher.exe
  • MsDtsSrvr.exe
  • msmdsrv.exe
  • ntdbsmgr.exe
  • oracle.exe
  • ReportingServecesService.exe
  • sqlserv.exe
  • sqlservr.exe
  • sqlwriter.exe

Other Details

This Ransomware does the following:

  • It deletes shadow copies by executing the following command:
    • vssadmin delete shadows /all /quiet

It deletes itself after execution.

It is capable of encrypting files in the affected system.

Ransomware Routine

This Ransomware avoids encrypting files with the following strings in their file name:

  • .diagcab
  • .dll
  • .drv
  • .icl
  • .ico
  • .icns
  • .idx
  • .lnk
  • .mod
  • .mpa
  • .msc
  • .msp
  • .msu
  • .ocx
  • .prf
  • .rom
  • .rtp
  • .scr
  • .shs
  • .spl
  • .sys
  • .theme
  • .themepacks
  • .theme
  • .themepack
  • .seed

It avoids encrypting files found in the following folders:

  • %Windows%
  • %Program Files%
  • %System Root%\System Volume Information
  • %System Root%\$Recycle.Bin
  • %ProgramData%

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000, Server 2003, and XP (32-bit), Vista (32-bit), 7 (32-bit), and 8 (32-bit), or C:\Program Files (x86) in Windows XP (64-bit), Vista (64-bit), 7 (64-bit), and 8 (64-bit).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %ProgramData% is a version of the Program Files folder where any user on a multi-user computer can make changes to programs. This contains application data for all users. This is usually C:\ProgramData in Windows Vista, 7, and 8.)

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

  • .seed

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

  • {Infected Directory}\!#_How_to_decrypt_files_#!.txt

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.982.04

FIRST VSAPI PATTERN DATE:

06 May 2019

VSAPI OPR PATTERN File:

14.983.00

VSAPI OPR PATTERN Date:

07 May 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

Search and delete files detected as Ransom.Win64.EVERBE.THCOEAI

[ Learn More ]
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.  
  • {Infected Directory}\!#_How_to_decrypt_files_#!.txt

Step 4

Scan your computer with your Trend Micro product to delete files detected as Ransom.Win64.EVERBE.THCOEAI. 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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