JS_LOCKY.DLDSDZR

February 21, 2017
 Analysis by: Ryan Paolo Maglaque
 ALIASES:

TrojanDownloader:JS/Nemucod(Microsoft);JS/TrojanDownloader.Nemucod.CHB trojan(Eset Nod32)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It modifies the Internet Explorer Zone Settings.

  TECHNICAL DETAILS

File Size:

644 bytes

File Type:

JS

Memory Resident:

No

Initial Samples Received Date:

19 Feb 2017

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Web Browser Home Page and Search Page Modification

This Trojan modifies the Internet Explorer Zone Settings.

Other Details

This Trojan connects to the following possibly malicious URL:

  • http://{BLOCKED}diamondresorts.com/counter/?LRcf8BCo_z7q4UpejbYe_Lq8BGxoxVD6nHULaPQXGVJfhn2GbpvJjujO4-ODbGRramRRgtAn0
  • http://{BLOCKED}n-driven.co/counter/?LRcf8BCo_z7q4UpejbYe_Lq8BGxoxVD6nHULaPQXGVJfhn2GbpvJjujO4-ODbGRramRRgtAn0
  • http://{BLOCKED}adcaribe.cityguiabarranquilla.com/counter/?LRcf8BCo_z7q4UpejbYe_Lq8BGxoxVD6nHULaPQXGVJfhn2GbpvJjujO4-ODbGRramRRgtAn0
  • http://{BLOCKED}31.com/counter/?LRcf8BCo_z7q4UpejbYe_Lq8BGxoxVD6nHULaPQXGVJfhn2GbpvJjujO4-ODbGRramRRgtAn0
  • http://{BLOCKED}flifecuisine.com/counter/?LRcf8BCo_z7q4UpejbYe_Lq8BGxoxVD6nHULaPQXGVJfhn2GbpvJjujO4-ODbGRramRRgtAn0

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.230.00

FIRST VSAPI PATTERN DATE:

18 Feb 2017

VSAPI OPR PATTERN File:

13.231.00

VSAPI OPR PATTERN Date:

19 Feb 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

Scan your computer with your Trend Micro product to delete files detected as JS_LOCKY.DLDSDZR. 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 3

Reset Internet security settings

[ Learn More ]


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