PUA.PHP.AFoxTest.A
N/A
Windows, Linux, Mac
Threat Type: Potentially Unwanted Application
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
This Potentially Unwanted Application 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 commands from a remote malicious user, effectively compromising the affected system.
It takes advantage of certain vulnerabilities.
TECHNICAL DETAILS
197,739 bytes
PHP
No
Connects to URLs/IPs, Steals information, Executes app
Arrival Details
This Potentially Unwanted Application 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 Potentially Unwanted Application drops the following files:
- {Malware file path}\{Random}.php
Backdoor Routine
This Potentially Unwanted Application executes the following commands from a remote malicious user:
- Manage file system (create file, read file, query file, move file, delete file, create directory)
- Execute arbitrary commands (shell commands, PHP commands)
- Gain root access through Dirty Cow exploit
- Manage database
- Zip/unzip files
- Upload files
- Get user credentials
- Reset cPanel passwords
- Create SMTP/RDP/mailer
- Brute-force FTP credentials
- Bind port to shell
- Change backconnect configuration
- Remove self
- Deface index files
- Configure redirects
Download Routine
This Potentially Unwanted Application accesses the following websites to download files:
- https://www.{BLOCKED}r.org/version/?current={Version}
- https://raw.githubusercontent.com/{BLOCKED}ox-com/0/main/leafmailer2.8.php
It saves the files it downloads using the following names:
- {Malware file path}\adminer-{Random}.php
- {Malware file path}\mailer-{Random}.php
Information Theft
Upon execution of the affected application, it gathers the following information:
- Username
- User account information
- Memory information (actual size, size of free space)
- Server information (loaded modules, phpinfo, server software, account settings)
- Current working directory and permissions
- Drives
- Operating system information
- IP address
Other Details
This Potentially Unwanted Application takes advantage of the following vulnerabilities:
- CVE-2016-5195 (Dirty COW)
SOLUTION
9.800
2.467.00
02 Dec 2021
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 file
- {Malware file path}\adminer-{Random}.php
- {Malware file path}\mailer-{Random}.php
- {Malware file path}\{Random}.php
Step 4
Scan your computer with your Trend Micro product to delete files detected as PUA.PHP.AFoxTest.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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