Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
11 detections
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Detects the presence of self-signed TLS certificates with the common name 'JDYFJ' in the certificate subject or issuer fields. This pattern has been associated with the KV-Botnet, which has been utilized by the Volt Typhoon threat actor to obfuscate command and control traffic through compromised SOHO routers.
Detects outbound network connections to common Tor relay and exit ports (9001, 9050) initiated by processes other than authorized Tor clients. This activity is often associated with threat actors, including Volt Typhoon, using Tor to obfuscate command-and-control (C2) traffic.
This rule detects potential beaconing or re-registration activity associated with the JDY/KV-botnet by monitoring network connections to known Tor control/relay ports (9001 and 9050). The detection identifies endpoints making high-volume, multi-destination connections to external IPs over these specific ports, a pattern indicative of botnet nodes attempting to re-establish C2 communication after infrastructure disruption or actively recruiting new nodes.
Detects a suspicious sequence of events where a file with an architecture-specific name (often associated with botnet payloads like JDY/KV-botnet) is created, executed, and deleted within a 60-second window. This behavior is indicative of transient malicious payloads executing and self-removing to evade detection.
Detects high-cardinality, multi-protocol network scanning behavior characteristic of the JDY botnet. The rule identifies internal hosts attempting to connect to a high volume of unique external destinations across multiple protocols with low average bytes per connection, indicative of automated discovery or probing activity.
Identifies shell commands associated with downloading architecture-specific payloads (e.g., mips, mipsel) commonly used by IoT/SOHO botnet droppers like the JDY botnet.
Detects instances where an executable is deleted immediately after execution, a common defense evasion technique used by memory-resident malware like the JDY botnet. This rule specifically looks for shell processes executing 'chmod +x' or 'chmod 777' followed by 'rm' commands, often chained with '&&', ';', or '||', indicating immediate self-deletion after execution.
KQL Query
This query was originally published in the threat analytics report, Sysrv botnet evolution.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances where the attacker commanded the Kinsing miner file to be downloaded on Linux devices.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances where the attacker commanded the Kinsing miner file to be downloaded on Linux devices.
This query was originally published in the threat analytics report, Sysrv botnet evolution.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances of the attacker attempting to stop the AppArmor network security service on devices running Linux.
Sysrv is a Go-based botnet that targets both Windows and Linux servers, and steals resources to mine cryptocurrency.
The following query finds instances of the attacker attempting to stop the AppArmor network security service on devices running Linux.
This is a query to retrieve last 30 days network connections to known Dofoil NameCoin servers.
The full article is available here: https://cloudblogs.microsoft.com/microsoftsecure/2018/04/04/hunting-down-dofoil-with-windows-defender-atp.
The full article is available here: https://cloudblogs.microsoft.com/microsoftsecure/2018/04/04/hunting-down-dofoil-with-windows-defender-atp.