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TrojanSpy.Win32.BLUTEAL.D

February 11, 2020
 Analysis by: Warren Adam Sto. Tomas
 ALIASES:

VirTool.Win32.Injector (Ikarus);

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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

It executes commands from a remote malicious user, effectively compromising the affected system.

It requires its main component to successfully perform its intended routine.

  TECHNICAL DETAILS

File Size:

239,104 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

11 Feb 2020

Arrival Details

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

It may be dropped by other malware.

Installation

This Trojan Spy adds the following mutexes to ensure that only one of its copies runs at any one time:

  • {650DAE86-2E8C-F6F2-AC2C-655BA4A8D4F8}

Backdoor Routine

This Trojan Spy executes the following commands from a remote malicious user:

  • Download and execute a file
  • Perform DDoS attack

It connects to the following URL(s) to send and receive commands from a remote malicious user:

  • doc.{BLOCKED}.com:80

Download Routine

This Trojan Spy saves the files it downloads using the following names:

  • %User Temp%\{random characters}.exe

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other Details

This Trojan Spy requires its main component to successfully perform its intended routine.

It does the following:

  • It requires the following file in order to execute its malicious routines properly:
    • {Malware directory}\java-log-9527.log -> detected as DDOS_NITOL.SMC
  • It gathers the following information and sends to its server:
    • System Language Identifier
    • OS Information
    • Processor Information
    • Network Adapter Information
    • Program Version

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.678.04

FIRST VSAPI PATTERN DATE:

11 Feb 2020

VSAPI OPR PATTERN File:

15.679.00

VSAPI OPR PATTERN Date:

12 Feb 2020

Step 1

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 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 these files

[ 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.  
  • {Malware directory}\java-log-9527.log
  • %User Temp%\{random characters}.exe

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TrojanSpy.Win32.BLUTEAL.D. 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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