Analysis by: Lorenzo Martin Lopez
ALIASES:

Trojan-Downloader.Win32.Hancitor (IKARUS), Trojan:Win32/Hancitor.ARK!MTB (MICROSOFT)

 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

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: 25,600 bytes
Memory Resident: No
Initial Samples Received Date: 17 Feb 2021
Payload: Connects to URLs/IPs, Steals information

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.

Backdoor Routine

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

  • http://{BLOCKED}lahal.com/8/forum.php
  • http://{BLOCKED}drablis.ru/8/forum.php
  • http://{BLOCKED}sweyband.ru/8/forum.php

Information Theft

This Backdoor gathers the following data:

  • System GUID
  • Username+Hostname
  • IP Address
  • OS BUILD

Other Details

This Backdoor connects to the following URL(s) to get the affected system's IP address:

  • http://api.ipify.org

It does the following:

  • After sending the data, the malware expects to receive one of the following commands:
    • Format:
      • {“command letter”:”binary file data”}
    • Commands:
      • r: Drops payload binary as %temp%\BN and Execute using “RUNDLL {Payload file} start”
      • l: Inject the payload into an svchost process
      • e: Load the payload into a Thread from own process
      • b: Terminate a process
      • n: Idle

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.544.06
FIRST VSAPI PATTERN DATE: 17 Feb 2021
VSAPI OPR PATTERN File: 16.545.00
VSAPI OPR PATTERN Date: 18 Feb 2021

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

  • Troj.Win32.TRX.XXPE50FFF041

Step 2

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 3

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 4

Identify and terminate files detected as Backdoor.Win32.HANCITOR.AD

[ 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 5

Scan your computer with your Trend Micro product to delete files detected as Backdoor.Win32.HANCITOR.AD. 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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