Analysis by: Rheniel Rhay Ramos
ALIASES:

Backdoor.Win32.Agent.dpiz (Kaspersky); RDN/Generic BackDoor (McAfee); Backdoor:Win32/Truebot.A (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, 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: 201,216 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 16 Jul 2017
Payload: Connects to URLs/IPs, Steals information, Compromises system security

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.

Autostart Technique

This Backdoor starts the following services:

  • Default monitors

Backdoor Routine

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

  • {BLOCKED}.{BLOCKED}.184.29/index.php?xy={random}

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

  • Computer Name
  • Log-on Server
  • Processor Information
  • Operating System
  • Specific File Paths (i.e. Windows Directory, Program Data, Program Files)
  • List of files with the following extensions:
    • .COM
    • .EXE
    • .BAT
    • .CMD.VBS
    • .VBE
    • .JS
    • .JSE
    • .WSF
    • .WSH
    • .MSC
    • .py
    • .pyw
  • User Domain
  • User Name
  • Windows Tracing Log File

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.758.08
FIRST VSAPI PATTERN DATE: 25 Sep 2017
VSAPI OPR PATTERN File: 13.759.00
VSAPI OPR PATTERN Date: 26 Sep 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

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

Disable this malware service

[ Learn More ]
  •  
    • Default monitors

Step 4

Scan your computer with your Trend Micro product to delete files detected as BKDR_TRUEBOT.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 this Knowledge Base page for more information.


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