arrow_back
search
close

Ransom.MSIL.RABBITLOCKER.THCBBAI

April 05, 2019
 Analysis by: Jemimah Mae Molina
 ALIASES:

TR/LockScreen.xkugh (ANTIVIR); MSIL/LockScreen.ACI!tr (FORTINET)

 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:

Downloaded from the Internet, Dropped by other malware

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.

  TECHNICAL DETAILS

File Size:

254,976 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

22 Mar 2019

Payload:

Modifies system registry, Hides files and processes, Displays graphics/image

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.

Autostart Technique

This Ransomware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Windows_Service = {malware directory}\{malware file name}

Other System Modifications

This Ransomware modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Policies\
System
DisableTaskMgr = 1

Other Details

This Ransomware does the following:

  • It hides the taskbar.
  • It displays the following:
  • The machine can be unlocked using the following password:
    • RabbCompany66

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

14.888.03

FIRST VSAPI PATTERN DATE:

22 Mar 2019

VSAPI OPR PATTERN File:

14.889.00

VSAPI OPR PATTERN Date:

23 Mar 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

Scan your computer with your Trend Micro product to delete files detected as Ransom.MSIL.RABBITLOCKER.THCBBAI. 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:

NOTES:
To unlock the machine, enter the following password:

  • RabbCompany66


Did this description help? Tell us how we did.