DDI RULE 5032
May 25, 2024
DESCRIPTION NAME:
Copy BAT Files - SMB2 (Request)
CONFIDENCE LEVEL:
SEVERITY INBOUND:
SEVERITY OUTBOUND:
Informational
Low
Medium
High
OVERVIEW
This is Trend Micro detection for packets passing through SMB2 network protocols that manifests Suspicious File Download activities which can be a potential intrusion. Below are some indicators of unusual behavior:
- Suspicious activity in administrator or privileged accounts
- Dubious logins, access, and other network activities that indicate probing or brute force attacks
- Anomalous spike of requests
- Network traffic that traverses in unusually used ports
- Unknown files, applications, and processes in the system
- Unusual traffic going in and out of the network
- Unusual message or file structure
TECHNICAL DETAILS
Attack Phase: Lateral Movement
Protocol: SMB2
Risk Type: OTHERS
(Note: OTHERS can be network connections related to hacking attempts, exploits, connections done by grayware, or suspicious traffic.)
Threat Type: Suspicious Behavior
Confidence Level: Low
Severity: Low(Inbound)| Low(Outbound)
DDI Default Rule Status: Disable
Event Class: File
Event Sub Class: Executable
Behavior Indicator: Suspicious File Download
APT Related: NO
SOLUTION
Network Content Inspection Pattern Version: 1.15681.00
Network Content Inspection Pattern Release Date: 21 May 2024
Network Content Correlation Pattern Version: 1.15451.00
Network Content Correlation Pattern Release Date: 21 May 2024
Immediate Action
- Update your Trend Micro products and pattern files to the latest version.
- Scan the host exhibiting this type of network behavior to clean any detected items.
Secondary Action
If scanning fails to detect a malware infection:
- If possible, disconnect the host from the network to prevent any further communication or malicious activities the malware may attempt.
- Run RootkitBuster to check through hidden files, registry entries, processes, drivers, and hooked system services.
- Use the Anti-Threat Toolkit (ATTK) tools to collect undetected malware information.
- Identify and clean threats with Rescue Disk, specific to suspected threats that are persistent or difficult-to-clean. Rescue Disk allows you to use a CD, DVD, or USB drive to examine your computer without launching Microsoft Windows.
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