Analysis by: Jon Dexter Laurin
ALIASES:

HEUR:Trojan.Win32.Generic (Kaspersky); Trojan.Gen.SMH (Norton); Troj/Dridex-AJ (Sophos); Trojan horse Downloader.Generic14.JOP (AVG); Trojan.Spy.Agent.OKV (BitDefender); Trojan.Dridex (Ikarus); Win32/Dridex.J trojan (ESET-NOD32); Trojan winpe/Dridex.K (Norman)

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

It deletes itself after execution.

  TECHNICAL DETAILS

File Size: 98,304 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 06 Jul 2015

Arrival Details

This spyware 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 spyware drops the following copies of itself into the affected system and executes them:

  • %System Root%\edg{number}.exe

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

It drops the following files:

  • %System Root%\edg{number}.tmp - deleted afterwards

(Note: %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

Other Details

This spyware connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.47.105:80
  • http://{BLOCKED}.{BLOCKED}.99.18:80
  • http://{BLOCKED}.{BLOCKED}.237.218:80
  • http://{BLOCKED}.{BLOCKED}.179.66:8080

It deletes itself after execution.

  SOLUTION

Minimum Scan Engine: 9.750
VSAPI OPR PATTERN File: 11.775.00
VSAPI OPR PATTERN Date: 06 Jul 2015

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

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 3

Restart in Safe Mode

[ Learn More ]

Step 4

Search and delete this file

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.  %System Root%\edg{number}.tmp

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TSPY_DRIDEX.SMN2. 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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