arrow_back
search
close

RANSOM_SURERAN.A

September 08, 2017
 ALIASES:

Troj/FakeLock-Z(Sophos)

 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

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:

161,792 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 Aug 2017

Payload:

Displays windows, 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 drops the following file(s) in the Windows User Startup folder to enable its automatic execution at every system startup:

  • %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:

  • UserName
  • Computer Name
  • Files(And also state if encryptable, viewable, or unsupported)

Stolen Information

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

  • http://{BLOCKED}kgov.uk/action/?action=files&username={ComputerName}%5C{Username}&computer={ComputerName}

Other Details

This Ransomware does the following:

  • Displays the following window:
  • After clicking Purchase Key, display the following window:
  • After clicking the check button which says Purchase Key display the following window:
  • After clicking the close button, deletes self and the dropped copy in startup and exits

NOTES:
This malware does not have the ability to encrypt files.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.626.01

FIRST VSAPI PATTERN DATE:

29 Aug 2017

VSAPI OPR PATTERN File:

13.627.00

VSAPI OPR PATTERN Date:

30 Aug 2017

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

Restart in Safe Mode

[ Learn More ]

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

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_SURERAN.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 this Knowledge Base page for more information.

Step 6

Restore encrypted files from backup.


Did this description help? Tell us how we did.