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RANSOM_NEDSOM.B

March 31, 2017
 Analysis by: Ryan Paolo Maglaque
 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:

7,680 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 Mar 2017

Payload:

Encrypts files, Steals information, Connects to URLs/IPs

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.

Stolen Information

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

  • http://{BLOCKED}.{BLOCKED}.177.253/up6.php

Other Details

This Ransomware encrypts files with the following extensions:

  • .doc
  • .xls
  • .jpg
  • .txt

It renames encrypted files using the following names:

  • {Original File Name and Extension}.ned

It does the following:

  • Encrypts files in the Z:\Ransomware directory and its subdirectories
  • Sends the Computer Name and the key used for encryption via HTTP POST

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.308.07

FIRST VSAPI PATTERN DATE:

30 Mar 2017

VSAPI OPR PATTERN File:

13.309.00

VSAPI OPR PATTERN Date:

31 Mar 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

Restart in Safe Mode

[ Learn More ]

Step 3

Restart in normal mode and scan your computer with your Trend Micro product for files detected as RANSOM_NEDSOM.B. 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 4

Restore encrypted files from backup.


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