TrojanSpy.MSIL.ZARAZASTEALER.A

April 29, 2024
 Analysis by: Melvin Jhun Palbusa
 ALIASES:

Trojan:MSIL/ZarazaStelaer.CTP!MTB (MICROSOFT)

 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, 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.

  TECHNICAL DETAILS

File Size:

303,616 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 Jan 2024

Payload:

Connects to URLs/IPs, Steals information, 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.

Installation

This Trojan Spy adds the following folders:

  • %User Temp%\{Machine's Username}

(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).)

It drops the following files:

  • %User Temp%\{Machine's Username}\output.txt → Contains gathered credentials from browsers. Deletes after exfiltration

(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).)

Information Theft

This Trojan Spy gathers the following data:

  • It gathers credentials from the following browsers:
    • 360 Browser
    • 7Star
    • Amigo
    • AVAST Software
    • AVG Browser
    • Brave Browser
    • CCleaner
    • CentBrowser
    • Chedot
    • Chrome
    • Chromium | SRWare
    • Iron Browser
    • Citrio
    • CocCoc
    • Comodo Dragon
    • CoolNovo
    • Coowon
    • Edge Chromium (Microsoft Edge)
    • Elements Browser
    • Epic Privacy Browser
    • Iridium Browser
    • Kinza
    • Kometa
    • Liebao Browser
    • Opera
    • Opera GX
    • Opera Neon
    • Orbitum
    • QIP Surf
    • SalamWeb
    • Sleipnir 6
    • Slimjet
    • Sputnik
    • Torch Browser
    • uCozMedia
    • URBrowser
    • Vivaldi
    • Yandex
  • Desktop Screenshot:
    • Saves it to %User Temp%\{Username}\Screen.jpg → Deletes after exfiltration

(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).)

Stolen Information

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

  • https://{BLOCKED}.me/zarazaA_bot

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

19.302.05

FIRST VSAPI PATTERN DATE:

26 Apr 2024

VSAPI OPR PATTERN File:

19.303.00

VSAPI OPR PATTERN Date:

27 Apr 2024

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

Search and delete this folder

[ 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.  
  • %User Temp%\{Machine's Username}

Step 4

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.MSIL.ZARAZASTEALER.A. 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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