Analysis by: Jay Garcia


Trojan.Win32.VBKryjetor.bxbx (Kaspersky); Trojan:Win32/Purforg (Microsoft)


Windows 7, Windows 8, Windows 10


  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes


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. It may be downloaded by other malware/grayware from remote sites.


File Size: 475,136 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 24 Jun 2019
Payload: Steals information, Connects to URLs/IPs, Drops files

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.

It may be downloaded by the following malware/grayware from remote sites:

Information Theft

This Trojan Spy gathers the following data:

  • User Name
  • Computer Name
  • IP Address
  • OS Name
  • OS Version Platform
  • OS Version
  • Processor Name
  • Amount of Physical Memory
  • Video Card Name
  • Video Card Memory
  • Screenshots
  • Username and Password from the following applications:
    • 7Star
    • Amigo
    • BlackHawk
    • Brave
    • CentBrowser
    • Chedot
    • Chrome
    • Chromium
    • Coccoc
    • Comodo Dragon
    • Cool Novo
    • CoreFTP
    • CyberFox
    • DynDNS
    • Elements Browser
    • Epic Privacy
    • Eudora
    • FileZilla
    • FlashFXP
    • Flock
    • Foxmail
    • FTP Commander
    • FTP Navigator
    • IceCat
    • IceDragon
    • IncrediMail
    • Internet Download Manager
    • Internet Explorer
    • Ipswitch
    • jDownloader
    • KMeleon
    • Kometa
    • Mozilla
    • No-IP
    • OpenVPN
    • Opera Browser
    • Opera Mail
    • Orbitum
    • Outlook
    • PaleMoon
    • Paltalk
    • Pidgin
    • Pocomail
    • Postbox
    • Safari
    • Sea Monkey
    • Smart FTP
    • Sputnik
    • The Bat!
    • Thunderbird
    • Torch Browser
    • UCBrowser
    • Uran
    • Vitalwerks
    • Vivaldi
    • WinSCP 2
    • WS_FTP
    • Yandex

Stolen Information

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


Other Details

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

  • http://{BLOCKED}

It drops the following file(s)/component(s):

  • %Application Data%\{random characters}.jpeg → screenshot

(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).)


Minimum Scan Engine: 9.850
VSAPI OPR PATTERN File: 15.197.00
VSAPI OPR PATTERN Date: 26 Jun 2019

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

Identify and terminate files detected as TrojanSpy.Win32.NEGASTEAL.YJG

[ 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 4

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%\{random characters}.jpeg

Step 5

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.NEGASTEAL.YJG. 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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