TrojanSpy.Win32.OYSTERLOADER.A
Trojan.Win32.OysterLoader (IKARUS)
Windows
Threat Type: Trojan Spy
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
Dropped by other malware, Downloaded from the Internet
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 gathers certain information on the affected computer.
TECHNICAL DETAILS
4,249,088 bytes
DLL
No
18 Jun 2024
Collects system information, Connects to URLs/IPs, 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 adds the following processes:
- schtasks /create /tn ClearMngs /tr "rundll32.exe \"{Malware File Path}\",Test" /sc hourly /mo 3 /f
It adds the following mutexes to ensure that only one of its copies runs at any one time:
- ITrkfSaV-4c7KwdfnC-Ds165XU4C-lH6R9pk1
Information Theft
This Trojan Spy gathers the following information on the affected computer:
- Username
- Computer Name
- User Information
- Operating System
- IP address
- Domain name
- User Privilege
Stolen Information
This Trojan Spy sends the gathered information via HTTP POST to the following URL:
- http://{BLOCKED}ndrysettlers.us
- http://{BLOCKED}erhomebe.com
- http://{BLOCKED}ectyourman.eu
Other Details
This Trojan Spy does the following:
- It adds the following schedule tasks:
- Location:{Schedule Tasks Root Directory}
- Name: ClearMngs
- Trigger: At {Time execution of malware} on {Date execution of malware} - After triggered, repeat every 03:00 indefinitely.
- Action Start a program - rundll32 "{Malware File Path},Test
SOLUTION
9.800
19.472.04
17 Jul 2024
19.473.00
18 Jul 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
Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.OYSTERLOADER.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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