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BKDR_IXESHE.NUO

September 08, 2017
 Analysis by: John Anthony Banes
 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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

It does not have any propagation routine.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

It deletes itself after execution.

  TECHNICAL DETAILS

File Size:

70,656 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

01 Sep 2017

Payload:

Connects to URLs/IPs, Compromises system security

Arrival Details

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

Other System Modifications

This Backdoor adds the following registry entries:

HKEY_CURRENT_UUSER\Software\Microsoft\
Windows\CurrentVersion\Internet Settings
ReceiveTimeout = 2147483647

Propagation

This Backdoor does not have any propagation routine.

Backdoor Routine

This Backdoor executes the following commands from a remote malicious user:

  • Capture Screenshot
  • List Active Applications
  • Execute files / arbitrary codes
  • Download files
  • Upload files
  • Delete files

It connects to the following websites to send and receive information:

  • {string from malware's arguments}

Rootkit Capabilities

This Backdoor does not have rootkit capabilities.

Information Theft

This Backdoor gathers the following data:

  • Computer Name
  • User Name
  • System Locale
  • OS Version

Other Details

This Backdoor deletes itself after execution.

It does not proceed to its malicious routine if it detects that it is being debugged.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.632.04

FIRST VSAPI PATTERN DATE:

01 Sep 2017

VSAPI OPR PATTERN File:

13.633.00

VSAPI OPR PATTERN Date:

02 Sep 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

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

Delete this registry value

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.

 
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings
    • ReceiveTimeout = 2147483647

Step 5

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