Analysis by: Arvin Roi Macaraeg
ALIASES:

Backdoor.Win32.Androm.stum(KASPERSKY ); Win32:CrypterX-gen [Trj](AVAST)

 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: Spammed via email, Dropped by other malware, Downloaded from the Internet

This Trojan Spy arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It executes then deletes itself afterward.

It does not have any propagation routine.

It does not have any backdoor routine.

  TECHNICAL DETAILS

File Size: 1,360,744 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 12 Jul 2019
Payload: Connects to URLs/IPs, Steals information

Arrival Details

This Trojan Spy arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It 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 drops the following files:

  • %Application Data%\{substring from hash of machine GUID}\{substring from hash of machine GUID}.lck - used for resource locking
  • %Application Data%\{substring from hash of machine GUID}\{substring from hash of machine GUID}.hdb - hash database of stolen information

(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).)

It drops the following copies of itself into the affected system:

  • %Application Data%\{substring from hash of machine GUID}\{substring from hash of machine GUID}.exe

(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).)

It creates the following folders:

  • %Application Data%\{substring from hash of machine GUID}

(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).)

It executes then deletes itself afterward.

It adds the following mutexes to ensure that only one of its copies runs at any one time:

  • {Hash of Machine GUID}

Propagation

This Trojan Spy does not have any propagation routine.

Backdoor Routine

This Trojan Spy does not have any backdoor routine.

Rootkit Capabilities

This Trojan Spy does not have rootkit capabilities.

Information Theft

This Trojan Spy gathers the following data:

  • User name
  • Computer name
  • Machine GUID

It attempts to steal stored account information used in the following installed File Transfer Protocol (FTP) clients or file manager software:

  • 32BitFtp
  • ALFTP
  • BitKinex
  • Bitvise SSH
  • BlazeFtp
  • ClassicFTP
  • Cyberduck
  • EasyFTP
  • ExpanDrive
  • Far
  • Far2
  • Far Manager
  • FileZilla
  • FlashFXP
  • Fling
  • FreshFTP
  • FTPBox
  • FTPGetter
  • FTPInfo
  • FTP Navigator
  • FTP Now
  • FTPShell
  • fullsync
  • DeluxeFTP
  • GoFTP
  • JaSFtp
  • AbleFTP
  • Automize
  • LinasFTP
  • MyFTP
  • NetDrive
  • NetDrive2
  • Fastream NETFile
  • NexusFile
  • NovaFTP
  • Notepad++ NppFTP
  • Odin Secure FTP Expert
  • PuTTY
  • KiTTY
  • SecureFX
  • SftpNetDrive
  • sherrod FTP
  • SmartFTP
  • Staff-FTP
  • Steed
  • SuperPutty
  • Syncovery
  • Total Commander
  • UltraFXP
  • WinFtp Client
  • FSProtocol
  • WinSCP
  • WS_FTP
  • Ipswitch
  • Xftp

It attempts to steal stored email credentials from the following:

  • Thunderbird
  • Postbox
  • FossaMail
  • Foxmail
  • IncrediMail
  • Outlook

It attempts to get stored information such as user names, passwords, and hostnames from the following browsers:

  • ChromePlus
  • Comodo Dragon
  • Chrome
  • Nichrome
  • Rockmelt
  • Spark
  • Chromium
  • Titan Browser
  • Torch
  • YandexBrowser
  • Epic Privacy Browser
  • CocCoc
  • Vivaldi
  • Chromodo
  • Superbird
  • Coowon
  • Mustang Browser
  • 360Browser
  • Citrio
  • Chrome SxS
  • Orbitum
  • Iridium
  • Opera
  • ChromiumViewer
  • Internet Explorer
  • Firefox
  • SeaMonkey
  • Flock Browser
  • K-Meleon
  • IceDragon
  • BlackHawk
  • Cyberfox
  • Pale Moon
  • Lunascape6
  • Waterfox
  • QtWeb
  • QupZilla
  • Safari

Stolen Information

This Trojan Spy sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}.website/kill1/playbook/onelove/fre.php

Other Details

This Trojan Spy does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.230.03
FIRST VSAPI PATTERN DATE: 12 Jul 2019
VSAPI OPR PATTERN File: 15.231.00
VSAPI OPR PATTERN Date: 13 Jul 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.LOKI.TIOIBOGL

[ 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 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.
  • %Application Data%\{substring from hash of machine GUID}\{substring from hash of machine GUID}.lck
  • %Application Data%\{substring from hash of machine GUID}\{substring from hash of machine GUID}.hdb
  • %Application Data%\{substring from hash of machine GUID}\{substring from hash of machine GUID}.exe

Step 5

Search and delete these folders

[ 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%\{substring from hash of machine GUID}

Step 6

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.LOKI.TIOIBOGL. 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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