Analysis by: Kim Cyrus Folloso
ALIASES:

MSIL/AgentTesla.C!tr.spy

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  TECHNICAL DETAILS

File Size: 214,016 bytes
File Type: EXE
Memory Resident: No
Payload: Steals information, Connects to URLs/IPs, Deletes files, Drops files, Modifies HOSTS file

Installation

This Trojan Spy drops the following files:

  • %User Temp%\tmpG{Random}.tmp - copy of itself
  • %Application Data%\{Random}\{Browser Profile Path}\cookies.sqlite
  • %Application Data%\{Random}\{Email Profile Path}\cookies.sqlite
  • %Application Data%\{Random}\Chrome\Default\Cookies

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

Other System Modifications

This Trojan Spy modifies the following file(s):

  • %System%\drivers\etc\hosts

(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)

It deletes the following files:

  • %Application Data%\{Random}\{Browser Profile Path}\cookies.sqlite
  • %Application Data%\{Random}\{Email Profile Path}\cookies.sqlite
  • %Application Data%\{Random}\Chrome\Default\Cookies

(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).)

Backdoor Routine

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

  • http://{BLOCKED}.{BLOCKED}.{BLOCKED}.137:8081/n/p9oz/asshole/b8f69190f8bd9583.php

Information Theft

This Trojan Spy gathers the following data:

  • Time
  • Username
  • Computer Name
  • OS Version
  • CPU Architecture
  • IP Address
  • Location
  • Primary Screen
  • Network Configuration
  • Other Hardware Information
  • Browsers:
    • 7Star
    • Amigo
    • BlackHawk
    • Brave Browser
    • CentBrowser
    • Chedot
    • Chrome
    • ChromePlus
    • Chromium
    • Citrio
    • Comodo Dragon
    • Comodo IceDragon
    • Coowon
    • Cyberfox
    • CốcCốc Browser
    • Elements Browser
    • Epic Privacy Browser
    • Falkon
    • Flock
    • Icecat
    • Iridium
    • K-Meleon
    • Kometa
    • Liebao
    • Microsoft Edge
    • Mozilla Firefox
    • Opera Stable
    • Orbitum
    • Pale Moon
    • QIP Surf
    • QQBrowser
    • SeaMonkey
    • Sleipnir
    • Sputnik
    • Torch
    • UCBrowser
    • Uran
    • Vivaldi
    • Waterfox
    • Yandex
  • Emails:
    • Becky!
    • Claws-Mail
    • eM Client
    • Eudora
    • FoxMail
    • IncrediMail
    • Mailbird
    • Opera Mail
    • Outlook
    • Pocomail
    • Postbox
    • The Bat!
    • Thunderbird
    • Windows Mail App
  • FTPs:
    • cftp
    • CoreFTP
    • Filezilla
    • FlashFXP
    • FTP Commander
    • FTP Commander Deluxe
    • FTPGetter
    • FTP navigator
    • SmartFTP
    • WinSCP
    • WS_FTP
  • Credentials from the following vaults:
    • Windows Secure Note
    • Windows Web Password Credential
    • Windows Credential Picker Protector
    • Web Credentials
    • Windows Credentials
    • Windows Domain Certificate Credential
    • Windows Domain Password Credential
    • Windows Extended Credential
  • Clipboard data

Other Details

This Trojan Spy does the following:

  • Installs a keylogger.

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 18.378.04
FIRST VSAPI PATTERN DATE: 12 Apr 2023
VSAPI OPR PATTERN File: 18.379.00
VSAPI OPR PATTERN Date: 13 Apr 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.XXPE50FFF067

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

Restart in Safe Mode

[ Learn More ]

Step 5

Remove these strings added by the malware/grayware/spyware in the HOSTS file

[ Learn More ]
    • 127.0.0.1 {Malicious URL}

Step 6

Search and delete this file

[ 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.
  • %User Temp%\tmpG{Random}.tmp

Step 7

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TrojanSpy.MSIL.NEGASTEAL.RJAHSPK. 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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