Detections
Explore public detection logic contributed by the community across SIEM and rule languages.
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Detects endpoint, network, and security log activity matching known indicators of compromise (IOCs) associated with PEERSTITCH / CL-STA-0954, including specific file hashes, IP addresses, and URLs.
Detects non-browser Python-based HTTP clients (such as python-requests, python-urllib, aiohttp, or httpx) targeting specific API endpoints (/user, /profile, /order, /upload) while exhibiting indicators of SQL injection or high-volume object ID enumeration.
Detects non-browser Python-based HTTP clients (such as python-requests, python-urllib, aiohttp, or httpx) targeting specific API endpoints (/user, /profile, /order, /upload) while exhibiting indicators of SQL injection or high-volume object ID enumeration.
Detects non-browser Python-based HTTP clients (such as python-requests, python-urllib, aiohttp, or httpx) targeting specific API endpoints (/user, /profile, /order, /upload) while exhibiting indicators of SQL injection or high-volume object ID enumeration.
Detects non-browser Python-based HTTP clients (such as python-requests, python-urllib, aiohttp, or httpx) targeting specific API endpoints (/user, /profile, /order, /upload) while exhibiting indicators of SQL injection or high-volume object ID enumeration.
Detects non-browser Python-based HTTP clients (such as python-requests, python-urllib, aiohttp, or httpx) targeting specific API endpoints (/user, /profile, /order, /upload) while exhibiting indicators of SQL injection or high-volume object ID enumeration.
The following analytic detects the execution of known remote access software within the environment.
It leverages network logs mapped to the Web data model, identifying specific URLs and user agents associated with remote access tools like AnyDesk, GoToMyPC, LogMeIn, and TeamViewer.
This activity is significant as adversaries often use these utilities to maintain unauthorized remote access. If confirmed malicious, this could allow attackers to control systems remotely, exfiltrate data, or further compromise the network, posing a severe security risk.
It leverages network logs mapped to the Web data model, identifying specific URLs and user agents associated with remote access tools like AnyDesk, GoToMyPC, LogMeIn, and TeamViewer.
This activity is significant as adversaries often use these utilities to maintain unauthorized remote access. If confirmed malicious, this could allow attackers to control systems remotely, exfiltrate data, or further compromise the network, posing a severe security risk.
The following analytic detects outbound connections to commonly abused file sharing and pastebin-style hosting domains.
It leverages Cisco Secure Firewall Threat Defense logs and focuses on allowed connections (action=Allow) where the url field matches a list of known data hosting or temporary storage services.
While many of these platforms serve legitimate purposes, they are frequently leveraged by adversaries for malware delivery, data exfiltration, command and control (C2) beacons, or staging of encoded payloads.
This analytic is valuable for identifying potential abuse of legitimate infrastructure as part of an attacker's kill chain.
It leverages Cisco Secure Firewall Threat Defense logs and focuses on allowed connections (action=Allow) where the url field matches a list of known data hosting or temporary storage services.
While many of these platforms serve legitimate purposes, they are frequently leveraged by adversaries for malware delivery, data exfiltration, command and control (C2) beacons, or staging of encoded payloads.
This analytic is valuable for identifying potential abuse of legitimate infrastructure as part of an attacker's kill chain.
Detects endpoint, network, and security log activity matching known indicators of compromise (IOCs) associated with PEERSTITCH / CL-STA-0954, including specific file hashes, IP addresses, and URLs.
IOC sweep for ARTEX campaign indicators: C2 host, nine proxy IPs, xcai.pro and its subdomains, and the CLAUDE.md URL across Defender, CEF/firewall, DNS and Entra sign-in telemetry. Domains match on exact host or subdomain only, connection types are limited to real connection events, and sign-ins are limited to successes and credential failures.
Detects one internal source repeatedly blocked from reaching URLs. Persistent
attempts after a block indicate automated software rather than a person — a person
gives up, malware retries on a timer.
Onboarding: VERSA-NETWORKS is ingested via Syslog (KV) (Bloo extractor 806).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=webfilter where sourcename='VERSA-NETWORKS' and action='URL_BLOCKED'
| duration 1h
| groupby srcip, user
| select srcip, user, count(*) as cnt
| having cnt > 20
attempts after a block indicate automated software rather than a person — a person
gives up, malware retries on a timer.
Onboarding: VERSA-NETWORKS is ingested via Syslog (KV) (Bloo extractor 806).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=webfilter where sourcename='VERSA-NETWORKS' and action='URL_BLOCKED'
| duration 1h
| groupby srcip, user
| select srcip, user, count(*) as cnt
| having cnt > 20
Sweeps DNS, endpoint network and proxy/firewall telemetry for BraZetsu C2, panel and shop domains using exact or subdomain matching. The apex installscenter.com remains active on Cloudflare with wildcard certificates.
The following analytic detects potential reverse shell activity by identifying connections involving ports commonly associated with remote access tools, shell listeners, or tunneling utilities.
It leverages Cisco Secure Firewall Threat Defense logs and monitors destination ports against a list of non-standard, high-risk port values often used in post-exploitation scenarios.
Adversaries frequently configure tools like netcat, Meterpreter, or other backdoors to listen or connect over uncommon ports such as 4444 or 2222 to bypass standard monitoring and firewall rules.
It leverages Cisco Secure Firewall Threat Defense logs and monitors destination ports against a list of non-standard, high-risk port values often used in post-exploitation scenarios.
Adversaries frequently configure tools like netcat, Meterpreter, or other backdoors to listen or connect over uncommon ports such as 4444 or 2222 to bypass standard monitoring and firewall rules.
Sweeps proxy, firewall and endpoint network telemetry for requests to the three published BraZetsu Pastebin dead-drop raw URLs used to retrieve the XOR-encrypted C2 config.
Detects potential exploitation of the libcurl CURLOPT_REQUEST_TARGET CRLF injection vulnerability via web/proxy request logs where curl user-agents are observed with carriage return/line feed characters or injected request lines within the URI path.
Detects Kerberos service ticket requests observed in network traffic analysis.
Seeing this on the wire rather than at the domain controller catches harvesting even
where domain controller auditing is incomplete, and it gives the source address
directly rather than requiring correlation.
Onboarding: NTA is ingested via Network Traffic Analysis (Bloo extractor 717).
Integration guide: https://bloo.io/docs/integrations
BQL (Bloo Query Language):
stream=nta-connection where sourcename='NTA'
and action='KERBEROS_SERVICE_TICKET_REQUESTED'
| duration 1h
| groupby srcip, dstip
| select srcip, dstip, count(*) as cnt
| having cnt > 20
Seeing this on the wire rather than at the domain controller catches harvesting even
where domain controller auditing is incomplete, and it gives the source address
directly rather than requiring correlation.
Onboarding: NTA is ingested via Network Traffic Analysis (Bloo extractor 717).
Integration guide: https://bloo.io/docs/integrations
BQL (Bloo Query Language):
stream=nta-connection where sourcename='NTA'
and action='KERBEROS_SERVICE_TICKET_REQUESTED'
| duration 1h
| groupby srcip, dstip
| select srcip, dstip, count(*) as cnt
| having cnt > 20
Detects VNC and remote framebuffer sessions, including the authentication method
negotiated. RFB is frequently deployed without strong authentication on industrial
and legacy systems, and an attacker finding one has interactive desktop access to a
machine that often cannot run an endpoint agent at all.
Onboarding: NTA is ingested via Network Traffic Analysis (Bloo extractor 717).
Integration guide: https://bloo.io/docs/integrations
BQL (Bloo Query Language):
stream=nta-authentication-rfb where sourcename='NTA'
| groupby srcip, dstip, dstport, authmethod
negotiated. RFB is frequently deployed without strong authentication on industrial
and legacy systems, and an attacker finding one has interactive desktop access to a
machine that often cannot run an endpoint agent at all.
Onboarding: NTA is ingested via Network Traffic Analysis (Bloo extractor 717).
Integration guide: https://bloo.io/docs/integrations
BQL (Bloo Query Language):
stream=nta-authentication-rfb where sourcename='NTA'
| groupby srcip, dstip, dstport, authmethod
Detects a large outbound transfer measured at the Versa edge. Branch sites typically
send modest volumes, so a sustained upload from one is either a backup nobody
documented or data leaving a location with the least security coverage in the
estate.
Onboarding: VERSA-NETWORKS is ingested via Syslog (KV) (Bloo extractor 806).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=firewall where sourcename='VERSA-NETWORKS'
and action='SESSION_ESTABLISHED'
| duration 1h
| groupby srcip, dstip, dstport, app, txlen
send modest volumes, so a sustained upload from one is either a backup nobody
documented or data leaving a location with the least security coverage in the
estate.
Onboarding: VERSA-NETWORKS is ingested via Syslog (KV) (Bloo extractor 806).
Integration guide: https://bloo.io/docs/hypercloud/syslog-connector
BQL (Bloo Query Language):
stream=firewall where sourcename='VERSA-NETWORKS'
and action='SESSION_ESTABLISHED'
| duration 1h
| groupby srcip, dstip, dstport, app, txlen
Detects clusters of high-volume external source IPs from multiple countries sweeping the same financial web services within an hour.
Sweeps endpoint and firewall telemetry for connections to the two high-confidence BraZetsu infrastructure IPs. Review hits against the IP's first-seen date before blocking because the Njalla host has changed service.
Sweeps proxy, firewall and endpoint network telemetry for requests to the three published BraZetsu Pastebin dead-drop raw URLs used to retrieve the XOR-encrypted C2 config.
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