Backdoor.Win64.CROM.A
Windows
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
This Backdoor 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 connects to a website to send and receive information.
It gathers certain information on the affected computer.
TECHNICAL DETAILS
Arrival Details
This Backdoor 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 Backdoor adds the following processes:
- %System%\cmd.exe /c "wmic csproduct get uuid"
- %System%\cmd.exe /c "getmac"
- %System%\cmd.exe /c "ipconfig"
- %System%\cmd.exe /c "wmic os get Caption"
- %System%\cmd.exe /c "hostname"
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
Backdoor Routine
This Backdoor executes the following commands from a remote malicious user:
- Upload file
- Download file
- Zip Folder
- Execute file
- Set timestamp
- Execute arbitrary commands
It connects to the following websites to send and receive information:
- http://{BLOCKED}ort365.com/agentsAPI/initial/
- http://{BLOCKED}ort365.com/agentsAPI/message/
Information Theft
This Backdoor gathers the following information on the affected computer:
- UUID
- MAC Address
- IP
- Hostname
- Timestamp
- Operating system information
Other Details
This Backdoor does the following:
- It sets up a proxy server
It accepts the following parameters:
- {localHost}
- Establish a server connection
SOLUTION
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.XXPE50FFF053
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
Scan your computer with your Trend Micro product to delete files detected as Backdoor.Win64.CROM.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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