TrojanSpy.MSIL.FORMBOOK.PUSYBC

April 24, 2023
 Analysis by: Carlos Villegas Madrid
 ALIASES:

UDS:Trojan-PSW.MSIL.Agensla.gen (KASPERSKY)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet

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.

It does not have any propagation routine.

It logs a user's keystrokes to steal information.

It connects to certain websites to send and receive information. It terminates itself if it detects it is being run in a virtual environment.

  TECHNICAL DETAILS

File Size:

758,784 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

31 Mar 2023

Payload:

Connects to URLs/IPs, Compromises system security, Steals information, Logs keystrokes

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.

Installation

This Trojan Spy adds the following processes:

  • {Malware file path and name} "path"

It terminates itself if it finds the following processes in the affected system's memory:

  • vmwareuser.exe
  • vmwareservice.exe
  • vboxservice.exe
  • vboxtray.exe
  • sandboxiedcomlaunch.exe
  • sandboxierpcss.exe
  • procmon.exe
  • filemon.exe
  • wireshark.exe
  • netmon.exe
  • prl_tools_service.exe
  • prl_tools.exe
  • prl_cc.exe
  • sharedintapp.exe
  • vmtoolsd.exe
  • vmsrvc.exe
  • vmusrvc.exe
  • python.exe
  • perl.exe
  • regmon.exe

Propagation

This Trojan Spy does not have any propagation routine.

Rootkit Capabilities

This Trojan Spy does not have rootkit capabilities.

Information Theft

This Trojan Spy gathers the following data:

  • Clipboard data
  • Captured screenshots
  • Information from the following application:
    • 360 Browser
    • 3DFTP
    • AbsoluteTelnet
    • ALFTP
    • Avant
    • Baidu
    • Barca
    • BitKinex
    • BlackHawk
    • Browzar
    • Canary
    • Chrome
    • Chromium
    • Citrio
    • Comodo Dragon
    • CoolNovo
    • Coowon
    • CoreFTP
    • CyberFox
    • Deepnet
    • Dooble
    • Epic
    • Far File Manager
    • FileZilla
    • Firefox
    • FlashFXP
    • Fling
    • Foxmail
    • GMail
    • IceDragon
    • ICQ Messenger
    • Incmail
    • Internet Explorer
    • Iridium
    • KMeleon
    • LeechFTP
    • Lunascape
    • Maxthon
    • Microsoft Edge
    • Midori
    • Mustang
    • NCFTP
    • Opera
    • Opera Mail
    • Orbitum
    • Outlook
    • PaleMoon
    • Pidgin
    • QTWeb
    • QupZilla
    • Rambler
    • Safari
    • SafeZone
    • ScriptFTP
    • SeaMonkey
    • Skype
    • Sleipnir
    • SmartFTP
    • Superbird
    • Thunderbird
    • Titan
    • Tor Browser
    • Torch
    • Total Commander
    • Trillian
    • UC Browser
    • Vivaldi
    • Waterfox
    • WebDrive
    • WhatsApp
    • WinSCP
    • Yahoo Messenger
    • Yandex

It logs a user's keystrokes to steal information.

Other Details

This Trojan Spy connects to the following website to send and receive information:

  • http://www.t{BLOCKED}o.uk/ne28

It terminates itself if it detects it is being run in a virtual environment.

It does the following:

  • It adds and injects code to a newly-created process.
  • The newly-created process may be any of the following legitimate Windows application:
    • audiodg.exe
    • autochk.exe
    • autoconv.exe
    • autofmt.exe
    • chkdsk.exe
    • cmd.exe
    • cmmon32.exe
    • cmstp.exe
    • colorcpl.exe
    • control.exe
    • cscript.exe
    • dwm.exe
    • explorer.exe
    • help.exe
    • ipconfig.exe
    • lsass.exe
    • lsm.exe
    • msdt.exe
    • msg.exe
    • msiexec.exe
    • mstsc.exe
    • napstat.exe
    • nbtstat.exe
    • netsh.exe
    • netstat.exe
    • raserver.exe
    • rdpclip.exe
    • rundll32.exe
    • services.exe
    • spoolsv.exe
    • svchost.exe
    • systray.exe
    • taskhost.exe
    • wininit.exe
    • wlanext.exe
    • wscript.exe
    • wuapp.exe
    • wuauclt.exe
    • wwahost.exe
  • It terminates itself if the following DLL is loaded on its memory:
    • SbieDll.dll
  • It checks if its filepath contains the following strings:
    • VIRUS
    • SANDBOX
    • SAMPLE
    • C:\file.exe
  • The registry data {String} can contain any of the following:
    • VMWARE
    • VBOX
    • QEMU
  • Based on analysis of the codes, it has the following capabilities:
    • Disable Windows Defender
    • Create a scheduled task

NOTES:

It does not proceed to its malicious routine if it detects that it is being debugged.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

18.398.04

FIRST VSAPI PATTERN DATE:

21 Apr 2023

VSAPI OPR PATTERN File:

18.399.00

VSAPI OPR PATTERN Date:

22 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

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.MSIL.FORMBOOK.PUSYBC. 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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