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RANSOM_EVERBE.THEBAAH

June 05, 2018
 Analysis by: Carl Maverick Pascual
 ALIASES:

Ransom:Win32/Genasom (Microsoft) ; Trojan-Ransom.Win32.Gen.hoc (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


This Ransomware drops files as ransom note.

  TECHNICAL DETAILS

File Size:

108,544 bytes

File Type:

EXE

File Compression:

UPX

Memory Resident:

No

Payload:

Terminates processes, Displays message/message boxes

Process Termination

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

  • calc.exe

Other Details

This Ransomware does the following:

  • It deletes shadow copies by executing the following commands:
    • cmd.exe /c vssadmin Delete Shadows /All /Quiet
  • It encrypts files in fixed, removable and network drives.

Ransomware Routine

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

  • .[{BLOCKED}@airmail.cc ].everbe

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

  • {Encrypted Directory}\!=How_recovery_files=!.txt

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.264.03

FIRST VSAPI PATTERN DATE:

21 May 2018

VSAPI OPR PATTERN File:

14.265.00

VSAPI OPR PATTERN Date:

22 May 2018

Step 1

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 2

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 3

Identify and terminate files detected as RANSOM_EVERBE.THEBAAH

[ 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

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  
  • {Encrypted Directory}\!=How_recovery_files=!.txt

Step 5

Scan your computer with your Trend Micro product to delete files detected as RANSOM_EVERBE.THEBAAH. 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 6

Restore encrypted files from backup.

NOTES:

Enabling Volume Shadow Service

  1. Run the command prompt (cmd.exe) as administrator.
  2. Enable Volume Shadow Service by typing the following command:
    net start vss


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