TrojanSpy.Win32.ACRSTEALER.A

May 24, 2024

Analysis by: Melvin Jhun Palbusa

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:

362,496 bytes

File Type:

EXE

Memory Resident:

Initial Samples Received Date:

07 May 2024

Payload:

Connects to URLs/IPs, Drops files, Collects system information, Steals information

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 drops the following files:

%Temporary Internet Files%\Content.IE5\{Random Characters}\921e7ad-5b9e-4fca-97e6-c631b2636cc9.txt
%Temporary Internet Files%\Content.IE5\{Random Characters}\Up

(Note: %Temporary Internet Files% is the Temporary Internet Files folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temporary Internet Files on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\Temporary Internet Files on Windows Vista, 7 and 2008(64-bit), or C:\Users\{user name}\AppData\Local\Microsoft\Windows\INetCache on Windows 8, 8.1, 2012(64-bit) and 10(64-bit).)

Download Routine

This Trojan Spy connects to the following URL(s) to download its configuration file:

https://{BLOCKED}ommunity.com/profiles/76561199609719039

Information Theft

This Trojan Spy gathers the following data:

Operating System
OS architecture
Username
Number of processor
Running processes
Time Zone
System Driver
It gathers credentials from the following:
- Browser(User Data)
- Email Clients:
- FTPs:
- VPNs:
- Instant Messaging Applications:
- Password Manager:
- Other Applications:
- Browser Extension (e.g. Crypto wallet, Password Managers and Authenticator):

Stolen Information

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

https:\{BLOCKED}ko.biz

SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

19.356.04

FIRST VSAPI PATTERN DATE:

22 May 2024

VSAPI OPR PATTERN File:

19.357.00

VSAPI OPR PATTERN Date:

23 May 2024

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.XXPE50FFF080

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

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.

%Temporary Internet Files%\Content.IE5\{Random Characters}\8921e7ad-5b9e-4fca-97e6-c631b2636cc9.txt
%Temporary Internet Files%\Content.IE5\{Random Characters}\up

Step 5

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.ACRSTEALER.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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TrojanSpy.Win32.ACRSTEALER.A

OVERVIEW

TECHNICAL DETAILS

SOLUTION

參考資源

技術支援

關於趨勢

TrojanSpy.Win32.ACRSTEALER.A

OVERVIEW

TECHNICAL DETAILS

SOLUTION

參考資源

技術支援

關於趨勢

美洲 (The Americas)

中東與非洲 (Middle East & Africa)

歐洲

亞太地區 (Asia Pacific)