Analysis by: Patrick Noel Collado
ALIASES:

Trojan.Win32.Agentb.kgxk (Kaspersky), Trojan.Win32.Phantomnet (Ikarus)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • 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.

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

  TECHNICAL DETAILS

Payload: 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 executes the following commands from a remote malicious user:

  • -H {hash or file path} - To specify the NTLM Hash(es) the backdoor will use
  • -u {username or file path} -To specify the username the backdoor will use
  • -p {password or file path} -To specifcy the password the backdoor will use
  • -d {domain} -To specify the domain the backdoor will use
  • -x -Execute specified command
  • --execm -specifies how the command is executed
  • --sam -Dump SAM hashes from machine

Information Theft

This Backdoor gathers the following data:

  • Username
  • Machine name
  • Hostname
  • Domain

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 16.444.02
FIRST VSAPI PATTERN DATE: 29 Dec 2020
VSAPI OPR PATTERN File: 16.445.00
VSAPI OPR PATTERN Date: 30 Dec 2020

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

Scan your computer with your Trend Micro product to delete files detected as Backdoor.Win32.PHANTOMNET.YPAL-B. 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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