Analysis by: Ryan Paolo Maglaque
ALIASES:

Trojan.Dridex(Malwarebytes);

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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

This Trojan Spy may be downloaded by other malware/grayware from remote sites.

It connects to a website to send and receive information.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size: 131,072 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 11 Apr 2017
Payload: Connects to URLs/IPs, Steals information, Downloads files, Executes files

Arrival Details

This Trojan Spy may be downloaded by the following malware/grayware from remote sites:

It may be downloaded from the following remote sites:

  • http://{BLOCKED}sxcx90.com/7500.exe

Installation

This Trojan Spy injects codes into the following process(es):

  • svchost.exe
  • spoolsv.exe

Backdoor Routine

This Trojan Spy connects to the following websites to send and receive information:

  • {BLOCKED}.{BLOCKED}.205.100:4743
  • {BLOCKED}.{BLOCKED}.105.92:443
  • {BLOCKED}.{BLOCKED}.184.214:4743

Information Theft

This Trojan Spy gathers the following data:

  • username
  • OS version
  • installed applications

Other Details

This Trojan Spy does the following:

  • Downloads and executes a file.
  • Injects the downloaded file to a process.

It deletes itself after execution.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.334.03
FIRST VSAPI PATTERN DATE: 11 Apr 2017
VSAPI OPR PATTERN File: 13.335.00
VSAPI OPR PATTERN Date: 12 Apr 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

Remove malware/grayware files that dropped/downloaded TSPY_DRIDEX.SLP. (Note: Please skip this step if the threats listed below have already been removed.)

    • TROJ_CVE20170199.A

Step 4

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_DRIDEX.SLP. 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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