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BKDR_HANCITOR.JLC

October 19, 2017
 Analysis by: Joselyn Canuela
 ALIASES:

Trojan:Win32/Dynamer!ac (Microsoft), W32/Cutwail.AJ (exact) (FPROT)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware


This Backdoor may be dropped by other malware.

It executes commands from a remote malicious user, effectively compromising the affected system. However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

215,040 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

16 Oct 2017

Payload:

Connects to URLs/IPs

Arrival Details

This Backdoor may be dropped by the following malware:

Backdoor Routine

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

  • Download and save file from a specific URL and execute it
  • Download file from a specific URL and inject to svchost.exe
  • Download file from a specific URL and execute in memory

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

  • http://{BLOCKED}tguthat.com/ls5/forum.php
  • http://{BLOCKED}olcoligh.ru/ls5/forum.php
  • http://{BLOCKED}dfor.ru/ls5/forum.php

It posts the following information to its command and control (C&C) server:

  • Machine GUID
  • Computer Name
  • Account Name
  • Public IP Address
  • OS Version
  • The information are posted to the server in the following format:
    • GUID={GUID}&BUILD={Malware Version}&INFO={Computer Name} @ {Domain Name\User Name}&IP={Public IP Address}&TYPE=1&WIN={OS Version}(x64) or (x32)

However, as of this writing, the said sites are inaccessible.

Other Details

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

  • http://api.ipify.org

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

13.728.03

FIRST VSAPI PATTERN DATE:

19 Oct 2017

VSAPI OPR PATTERN File:

13.729.00

VSAPI OPR PATTERN Date:

20 Oct 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

Remove malware/grayware files that dropped/downloaded BKDR_HANCITOR.JLC. (Note: Please skip this step if the threats listed below have already been removed.)

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 BKDR_HANCITOR.JLC

[ 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 BKDR_HANCITOR.JLC. 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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