Darshan Thummar
@MightyCompletionist
1 follower18 downloads694 copies5 likes8,751 views
2,107 detections
Filters
Last updated
All Time
Detection languages
1,335
772
Categories
696
574
337
315
284
Platforms
1,363
586
192
85
85
Products / Services
1,327
297
79
39
34
MITRE Techniques
525
343
321
228
207
CVEs
1
1
IDS Classtypes
592
177
160
120
93
IDS Protocols
747
411
58
44
30
This rule detects the remote installation of a new systemd service unit. It specifically looks for TCP traffic on port 22 (SSH) within the home network that contains the strings "/etc/systemd/system/" and ".service" (case-insensitive). This combination suggests that a new systemd service file is being transferred or created remotely, which could indicate an attacker establishing persistence or escalating privileges.
This rule detects attempts to access named pipes via Server Message Block (SMB) on port 445. It specifically looks for the SMB signature and the 'IPC$' string within the traffic, indicating an attempt to establish an Inter-Process Communication (IPC) connection. A threshold is set to trigger an alert if 10 such events occur from the same source within 30 seconds, which could indicate enumeration or exploitation attempts.
This rule detects the download of a potential trojanized installer file over HTTP. It looks for HTTP responses to clients that contain 'setup', 'install', or 'installer' in the URI, have a file size greater than 500KB, and contain the 'MZ' header, indicating a Windows executable. This combination suggests a user is downloading an executable that could be malicious.
This rule detects an anomaly in Kerberos authentication attempts by monitoring TCP traffic to port 88 (Kerberos). It triggers an alert if a source IP address attempts Kerberos authentication 30 or more times within a 10-second window, indicating a potential brute-force or rapid authentication attempt against a domain account.
This rule detects attempts to log in to a web interface using default 'admin' credentials. It specifically looks for HTTP POST requests to a URI containing 'login' and a client body that contains 'admin' twice, indicating both username and password might be 'admin'.
This rule detects HTTP requests to URIs containing keywords associated with common IT management platforms (ConnectWise, Kaseya, SolarWinds, Datto, N-central). It specifically looks for established HTTP traffic flowing to the server. A threshold of 5 occurrences within 60 seconds from the same source IP is set to trigger an alert, indicating a potential remote access session or activity related to these platforms.
This rule detects RDP (Remote Desktop Protocol) sessions initiated towards the HOME_NET on port 3389. It specifically looks for the RDP connection initiation sequence (content:"|03 00|" with depth:2) and uses a threshold to detect multiple connections from the same source within a 5-minute window, which could indicate activity from a Managed Service Provider or other remote access scenarios.
This rule detects Server Message Block (SMB) access attempts from external sources to internal networks, specifically looking for NTLMSSP (NT LAN Manager Security Support Provider) authentication traffic. It triggers an alert if five such connections are observed from the same source IP within a 60-second window. This could indicate an attempt by a third-party vendor or an attacker to access internal resources via SMB.
This rule detects Address Resolution Protocol (ARP) poisoning attempts on a network segment, specifically looking for ARP reply packets (opcode 2). It uses a thresholding mechanism to trigger an alert if 10 such packets are observed from the same source within a 5-second window, indicating a potential malicious ARP spoofing activity.
This rule detects web pages that are likely part of a bank vishing callback scam. It looks for HTTP responses (flow:to_client) containing the keywords 'call', 'toll-free', and 'account' (case-insensitive) in the file data. This combination of keywords suggests a page designed to trick users into calling a fraudulent number to discuss their 'account'.
Page 155 of 211