Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
461 detections
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The analytic identifies anomalous inbound network traffic volumes from processes within containerized workloads. It leverages Network Performance Monitoring metrics collected via an OTEL collector and pulled from Splunk Observability Cloud. The detection compares recent metrics (tcp.bytes, tcp.new_sockets, tcp.packets, udp.bytes, udp.packets) over the last hour with the average over the past 30 days. This activity is significant as it may indicate unauthorized data reception, potential breaches, vulnerability exploitation, or malware propagation. If confirmed malicious, it could lead to command and control installation, data integrity damage, container escape, and further environment compromise.
Detects the execution of the "curl.exe" command, referencing "SOCKS" and ".onion" domains, which could be indicative of Kalambur backdoor activity.
Detects the modification of the PortProxy registry key which is used for port forwarding.
'It is reccomended that these Categories shoud be blocked by policies because they provide harmful/malicious content..'
Detects the execution of the "curl.exe" command, referencing "SOCKS" and ".onion" domains, which could be indicative of Kalambur backdoor activity.
Detects the use of IOX - a tool for port forwarding and intranet proxy purposes
Detects the modification of the PortProxy registry key which is used for port forwarding.
'Identifies IP addresses performing DNS lookups associated with common ToR proxies.
This analytic rule uses [ASIM](https://aka.ms/AboutASIM) and supports any built-in or custom source that supports the ASIM DNS schema'
This analytic rule uses [ASIM](https://aka.ms/AboutASIM) and supports any built-in or custom source that supports the ASIM DNS schema'
Detects the use of IOX - a tool for port forwarding and intranet proxy purposes
Detects execution of the "cloudflared" tool to connect back to a tunnel. This was seen used by threat actors to maintain persistence and remote access to compromised networks.
Detects cases in which ngrok, a reverse proxy tool, forwards events to the local RDP port, which could be a sign of malicious behaviour
Detects potentially suspicious execution of the Qemu utility in a Windows environment.
Threat actors have leveraged this utility and this technique for achieving network access as reported by Kaspersky.
Threat actors have leveraged this utility and this technique for achieving network access as reported by Kaspersky.
Detects executable names or flags used by Htran or Htran-like tools (e.g. NATBypass)
Detects execution of the "cloudflared" tool to connect back to a tunnel. This was seen used by threat actors to maintain persistence and remote access to compromised networks.
The analytic detects instances where network traffic, identified by port and transport layer protocol as prohibited in the "lookup_interesting_ports" table, is allowed. It uses the Network_Traffic data model to cross-reference traffic data against predefined security policies. This activity is significant for a SOC as it highlights potential misconfigurations or policy violations that could lead to unauthorized access or data exfiltration. If confirmed malicious, this could allow attackers to bypass network defenses, leading to potential data breaches and compromising the organization's security posture.
Tor
KQL
This query looks for Tor client, or for a common Tor plugin called Meek.
We query for active Tor connections, but could have alternatively looked for active Tor runs (ProcessCreateEvents) or Tor downloads (DeviceFileEvents).
To read more about this technique, see:.
Tor: https://attack.mitre.org/wiki/Software/S0183#Techniques_Used.
Meek plugin: https://attack.mitre.org/wiki/Software/S0175.
Multi-hop proxy technique: https://attack.mitre.org/wiki/Technique/T1188.
Tags: #Tor, #MultiHopProxy, #CnC.
We query for active Tor connections, but could have alternatively looked for active Tor runs (ProcessCreateEvents) or Tor downloads (DeviceFileEvents).
To read more about this technique, see:.
Tor: https://attack.mitre.org/wiki/Software/S0183#Techniques_Used.
Meek plugin: https://attack.mitre.org/wiki/Software/S0175.
Multi-hop proxy technique: https://attack.mitre.org/wiki/Technique/T1188.
Tags: #Tor, #MultiHopProxy, #CnC.
LemonDuck is an actively updated and robust malware primarily known for its botnet and cryptocurrency mining objectives. First discovered in 2019, LemonDuck has since adopted more sophisticated behavior and escalated its operations in 2021. Today, beyond using resources for its traditional bot and mining activities, LemonDuck steals credentials, removes security controls, spreads via emails, moves laterally, and ultimately drops more tools for human-operated activity.
This query checks for network connection failures to Microsoft Defender for Endpoint URLs.
The output includes any device with 1+ connectivity failures, a list of the domains they
failed to connect to (including the number of failures), as well as the overall number of
failures in the time period. Results are sorted by the total number of connection failures
by the device.
The output includes any device with 1+ connectivity failures, a list of the domains they
failed to connect to (including the number of failures), as well as the overall number of
failures in the time period. Results are sorted by the total number of connection failures
by the device.
Detects execution of the "cloudflared" tool with the tunnel "cleanup" flag in order to cleanup tunnel connections.
This advanced hunting query detects processes communicating with known Tor relay IP addresses.
The public URL in the query is updated daily at 12PM and 12AM UTC.
CSV source is the Tor Project API, obtained with: https://github.com/Dylan-J/Tor-Project-Statistics
The public URL in the query is updated daily at 12PM and 12AM UTC.
CSV source is the Tor Project API, obtained with: https://github.com/Dylan-J/Tor-Project-Statistics
'Rule helps to detect a rare user-agents indicating web browsing activity by an unusual process other than a web browser.'
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