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RANSOM_BLIND.C

February 05, 2018
 Analysis by: Noel Anthony Llimos
 ALIASES:

Trojan-Ransom.Win32.Gen.gfj (Kaspersky), Ransom.CryptXXX (Norton), Troj/Blind-A (SOPHOS_LITE)

 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 drops files as ransom note.

  TECHNICAL DETAILS

File Size:

651264 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

05 Feb 2018

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 processes or services that contain any of the following strings if found running in the affected system's memory:

  • oracle.exe
  • sqlserver.exe

Other Details

This Ransomware does the following:

  • It encrypts all files in fixed and network drives.

Ransomware Routine

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

  • .[skeleton@{BLOCKED}e.lol].skeleton

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

  • {Folders Containing Encrypted Files}How_Decrypt_Files.txt

NOTES:

This ransomware drops the following ransom note:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.842.03

VSAPI OPR PATTERN File:

13.843.00

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

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.  
  • {Folders Containing Encrypted Files}How_Decrypt_Files.hta

Step 4

Scan your computer with your Trend Micro product to delete files detected as RANSOM_BLIND.C. 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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