Analysis by: Henry Alarcon Jr.
ALIASES:

Troj/Carbanak-B (Sophos AV), W32/Agent.QWIHBW!tr (Fortinet), Trojan.MSIL.Agent.qwihbw (Kaspersky)

 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.

  TECHNICAL DETAILS

File Size: 142,336 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 23 Apr 2019
Payload: Displays windows

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 Details

This Backdoor requires the following additional components to properly run:

It does the following:

  • It requires password to connect to its C&C server:
    • After success authentication it will display the following to manage BOTS databases save in C&C server:

      • C&C Server:
        • Add, update and remove Bots
        • Add comment, status
      • Bots:
        • Video recording
        • Execute commands specified in the configuration file
        • Set the loaded state of the bot
        • Use specified proxy settings
        • Create or deletes a user with rights for RDP
        • Delete specified service or file
        • Download and executes a file in memory
        • Take a screenshot and sends it to the C&C server
        • Run VNC plugin
        • Uninstall bot
        • Update bot

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.956.05
FIRST VSAPI PATTERN DATE: 23 Apr 2019
VSAPI OPR PATTERN File: 14.957.00
VSAPI OPR PATTERN Date: 24 Apr 2019

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

Identify and terminate files detected as Backdoor.MSIL.CARBANAK.A

[ 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 4

Scan your computer with your Trend Micro product to delete files detected as Backdoor.MSIL.CARBANAK.A. 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 the following Trend Micro Support pages for more information:


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