RANSOM_SURESOME.THABBH

February 07, 2018
 Analysis by: Marcus Ma. Antonio Capistrano
 ALIASES:

Trojan-Ransom.MSIL.Agent.gqd (KASPERSKY), Trojan:Win32/Tiggre!rfn (MICROSOFT), W32.Golroted (NORTON)

 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

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 enables its automatic execution at every system startup by dropping copies of itself into the Windows Common Startup folder.

  TECHNICAL DETAILS

File Size:

161,280 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

15 Jan 2018

Payload:

Steals information, Connects to URLs/IPs, Displays message/message boxes

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 enables its automatic execution at every system startup by dropping the following copies of itself into the Windows Common Startup folder:

  • %User Startup%\cd445b84-305e-408a-9d66-5dca29257bb2.exe

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Documents and Settings\{user}\Start Menu\Programs\Startup on Windows 2000 and XP, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup on Windows Vista, 7, and 8.)

Information Theft

This Ransomware gathers the following data:

  • User name
  • Computer Name
  • Name and write access of folders on all drives. eg. {Drive letter}:\{folders on drive letter}

Stolen Information

This Ransomware sends the gathered information via HTTP POST to the following URL:

  • {BLOCKED}.{BLOCKED}.176.166/action/?action=files&username={User name}&computer={Computer Name}
  • {BLOCKED}.{BLOCKED}.176.166/action/?action=userdetails&username={User name}&computer={Computer Name}

Other Details

This Ransomware does the following:

  • It locks the desktop with a maximized view of the ransom note:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.920.04

FIRST VSAPI PATTERN DATE:

22 Jan 2018

VSAPI OPR PATTERN File:

13.921.00

VSAPI OPR PATTERN Date:

23 Jan 2018

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 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_SURESOME.THABBH

[ 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 this file

[ 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.  
  • %User Startup%\cd445b84-305e-408a-9d66-5dca29257bb2.exe

Step 5

Scan your computer with your Trend Micro product to delete files detected as RANSOM_SURESOME.THABBH. 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:


Did this description help? Tell us how we did.