BKDR_LUMINOSITY.Q


 ALIASES:

Backdoor.Win32.Androm.khof (Kaspersky), Trojan:Win32/Dynamer!ac (Microsoft)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 REPORTED INFECTION:

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

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

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

737,280 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

14 Oct 2016

Payload:

Collects system information, Downloads files, Executes files

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.

Installation

This backdoor drops the following copies of itself into the affected system:

  • %User Temp%\videobuffer.exe

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

Autostart Technique

This backdoor adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
(Default) = "%User Temp%\videobuffer.exe"

Backdoor Routine

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

  • Downloads and executes arbitrary files
  • Downloads and executes custom Crypto Miner
  • Downloads custom password recovery tool
  • Searches for files
  • Performs DDOS
  • Modifies HOSTS file to redirect hosts/URLs
  • Visits arbitrary websites (browser can be hidden and have muted audio)
  • Seeds torrent
  • Updates itself
  • Updates backup C&C
  • Remotes Desktop Control
  • Remotes shell
  • Remotes Script
  • Records audio using system's microphone
  • Controls Webcam
  • Uninstalls itself
  • Executes/Terminates/Disables Task Manager
  • Executes/Terminates/Disables Command Prompt
  • Executes/Terminates/Disables Registry Editor
  • Hides/Shows Taskbar
  • Hides/Shows Desktop
  • Opens/Closes CD-ROM door
  • Turns on/off user's monitor
  • Enables/Disables Keyboard
  • Enables/Disables Mouse
  • Swaps/Resets Mouse
  • Deletes Restore points
  • Enables/Disables input
  • Logs off User
  • Hibernates
  • Shutdowns system
  • Reboots System
  • Performs network speed test
  • Manage Files
  • Manage Processes
  • Gathers the following information:
    • Client Overview:
      • Client ID used
      • Country
    • Software Information:
      • User Privelege
      • Machine Name
    • Hardware Information:
      • Machine Type
      • CPU Information
      • GPU Information
      • RAM Information
      • Battery
      • Monitor Count
    • Network Information:
      • WAN address
      • Download Speed
      • LAN Address
      • MAC Address
    • Others:
      • Security information
      • Uptime
      • Active Windows
      • Current malware file location
      • Full OS version
      • Keystroke logs
      • Stored passwords

Other Details

This backdoor connects to the following website to send and receive information:

  • {BLOCKED}si.chickenkiller.com

It does the following:

  • It proactively blocks Anti-malware services by querying the installed Anti-Malware/Firewall product in the system. Once an anti-malware/firewall is found, it terminates the corresponding Anti-malware service/process.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.836.04

FIRST VSAPI PATTERN DATE:

14 Oct 2016

VSAPI OPR PATTERN File:

12.837.00

VSAPI OPR PATTERN Date:

15 Oct 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

Identify and terminate files detected as BKDR_LUMINOSITY.Q

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

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\Run
    • (Default) = "%User Temp%\videobuffer.exe"

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_LUMINOSITY.Q. 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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