Analysis by: Ricardo III Valdez
ALIASES:

Trojan:MSIL/AgentTesla.ASEF!MTB (MICROSOFT)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

This Trojan Spy 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: 545,280 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 03 Oct 2023
Payload: Collects system information, Connects to URLs/IPs, Steals information

Arrival Details

This Trojan Spy arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Information Theft

This Trojan Spy gathers the following data:

  • Computer Name
  • User Name
  • CPU Information
  • RAM Information
  • Network Adapter Configuration
  • Clipboard data
  • Current time
  • It gathers credentials from the following:
    • Browsers (User Data):
      • 360 Browser
      • 7Star
      • Amigo
      • BlackHawk
      • Brave
      • CentBrowser
      • Chedot
      • Chrome
      • Chromium
      • Citrio
      • Coccoc
      • Comodo Dragon
      • Cool Novo
      • Coowon
      • CyberFox
      • Edge Chromium
      • Elements Browser
      • Epic Privacy
      • Falkon Browswer
      • Firefox
      • Flock
      • Flock Browser
      • IceCat
      • IceDragon
      • IE/Edge
      • Iridium
      • K-Meleon
      • Kometa
      • Liebao Browser
      • Opera Stable
      • Orbitum
      • PaleMoon
      • QIP Surf
      • QQ Browser
      • Safari for Windows
      • SeaMonkey
      • Sleipnir 6
      • Sputnik
      • Torch
      • UC Browser
      • Uran
      • Vivaldi
      • WaterFox
      • Yandex
    • Email Clients:
      • Becky!
      • Claws Mail
      • eM client
      • Eudora
      • Foxmail
      • IncrediMail
      • Mailbird
      • Opera Mail
      • Outlook
      • Pocomail
      • Postbox
      • The Bat!
      • Thunderbird
      • Windows Mail App
    • FTPs:
      • CoreFTP
      • FileZilla
      • FlashFXP
      • FTP Commander
      • FTP Getter
      • FTP Navigator
      • SmartFTP
      • WinSCP
      • WS_FTP
    • VPNs:
      • NordVPN
      • OpenVPN
      • Private Internet Access
    • Instant Messaging Applications:
      • Discord
      • Psi/Psi+
      • Trillian
    • Other Applications:
      • Internet Download Manager
      • Jdownloader 2.0
      • MySQL Workbench

Stolen Information

This Trojan Spy sends the data it gathers to the following email addresses via SMTP:

  • Host: {BLOCKED}p.gmail.com
    Email: {BLOCKED}ashions@gmail.com
    Password: {BLOCKED}spfsavlvpr

Other Details

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

  • https:// {BLOCKED}fy.org

It does the following:

  • It has the capability to establish persistence on the victim's machine using the following file name and path:
    • %Application Data%\fKwlC\fKwlC.exe ← Malware copy

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 18.734.03
FIRST VSAPI PATTERN DATE: 03 Oct 2023
VSAPI OPR PATTERN File: 18.735.00
VSAPI OPR PATTERN Date: 04 Oct 2023

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.XXPE50FFF073

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 TrojanSpy.MSIL.NEGASTEAL.THJOCBC

[ 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

Search and delete these files

[ Learn More ]
There may be some files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • %Application Data%\fKwlC\fKwlC.exe

Step 6

Search and delete this folder

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • %Application Data%\fKwlC

Step 7

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.MSIL.NEGASTEAL.THJOCBC. 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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