TrojanSpy.Win32.INFOSTEALER.THBOCBO

February 04, 2020

Modified by: Jay Bradley Nebre

PLATFORM:

Windows

OVERALL RISK RATING:

DAMAGE POTENTIAL:

DISTRIBUTION POTENTIAL:

REPORTED INFECTION:

INFORMATION EXPOSURE:

Threat Type: Ransomware
Destructiveness: No
Encrypted:
In the wild: Yes

OVERVIEW

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

This Ransomware 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: 583,680 bytes

File Type: EXE

Memory Resident: No

Initial Samples Received Date: 29 Jan 2020

Payload: Drops files, Connects to URLs/IPs

Arrival Details

This Ransomware 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 Ransomware drops the following files:

%All Users Profile%\{random characters}\outlook.txt
%All Users Profile%\{random characters}\information.txt
%All Users Profile%\{random characters}\password.txt
%All Users Profile%\{random characters}\{random characters and numbers}.zip

(Note: %All Users Profile% is the common user's profile folder, which is usually C:\Documents and Settings\All Users on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\ProgramData on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit). )

It adds the following processes:

C:\Windows\System32\cmd.exe" /c taskkill /im {Malware Name}.exe /f & erase {Malware Path}\{Malware Name}.exe & exit;

Download Routine

This Ransomware connects to the following URL(s) to download its component file(s):

{BLOCKED}imals.net/276

It saves the files it downloads using the following names:

%All Users Profile%\freebl3.dll
%All Users Profile%\mozglue.dll
%All Users Profile%\msvcp140.dll
%All Users Profile%\nss3.dll
%All Users Profile%\softokn3.dll
%All Users Profile%\vcruntime140.dll

Information Theft

This Ransomware gathers the following data:

Outlook Credentials
Passwords
Version
Date
Machine ID
GUID
Path
Work Dir
OS
Computer Name
User Name
Display Resolution
Display Language
Keyboard Language
Timezone
Processor
CPU Count
RAM
Video Card
IP
Location
ISP
Running Process in the system
Installed Programs

Stolen Information

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

{BLOCKED}imals.net - send the zip file that contains all data gathered

Other Details

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

http://ip-api.com/line/

SOLUTION

Minimum Scan Engine: 9.850

FIRST VSAPI PATTERN FILE: 15.662.04

FIRST VSAPI PATTERN DATE: 03 Feb 2020

VSAPI OPR PATTERN File: 15.663.00

VSAPI OPR PATTERN Date: 04 Feb 2020

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.XXPE50FFF034

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.Win32.INFOSTEALER.THBOCBO. 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:

Did this description help? Tell us how we did.