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TROJ_ZLADER.YCXZ

August 05, 2016
 Analysis by: Cris Nowell Pantanilla
 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


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 executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  TECHNICAL DETAILS

File Size:

82,432 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

05 Aug 2016

Payload:

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 adds the following processes:

  • explorer.exe
  • svchost.exe

It injects codes into the following process(es):

  • explorer.exe
  • svchost.exe

Download Routine

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

  • http://{blocked}afaor.com:80/h/gate.php
  • http://{blocked}ngrabted.ru:80/h/gate.php
  • http://{blocked}wafiot.ru:80/h/gate.php

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.692.04

FIRST VSAPI PATTERN DATE:

03 Aug 2016

VSAPI OPR PATTERN File:

12.693.00

VSAPI OPR PATTERN Date:

04 Aug 2016

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 normal mode and scan your computer with your Trend Micro product for files detected as TROJ_ZLADER.YCXZ. 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.


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