Arnold Chan
@slazTrusted contributorCompletionist
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7,544 detections
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Surfaces Microsoft Defender alerts that reference Candiru/DevilsTongue spyware terms or associated CVEs (such as CVE-2021-31979, CVE-2021-33771, etc.) attributed in threat intelligence reports.
Surfaces Microsoft Defender alerts that reference Candiru/DevilsTongue spyware terms or associated CVEs (such as CVE-2021-31979, CVE-2021-33771, etc.) attributed in threat intelligence reports.
Detects the presence of known Candiru Windows DLL implant IOC hashes across device file events, process events, image loads, and email attachments.
Detects anomalous process execution and loopback network activity associated with the Model Context Protocol (MCP) 'exec_in_session' method. This pattern indicates an adversary potentially abusing the AI coding assistant's MCP server capabilities to execute arbitrary commands as a C2 channel.
Detects connections from internal hosts to the ARTEX-linked actor host 38.244.50.120, including requests for the exposed .claude/CLAUDE.md file and its open-directory port 18899.
Behavioral hunt for accounts whose non-interactive sign-ins over 30 days are dominated (>=95%) by a single IP using a scripted client (python/aiohttp/httpx/urllib) with no browser. Scripted now requires BOTH no browser AND a scripted user agent, and Microsoft ASN egress is excluded.
Detects an Entra 'Add device' event within 2 minutes after a successful sign-in from an IP never seen for that user in the lookback window, and where the registration originates from that same new IP (rogue device persistence after token replay).
Detects an Entra 'Add device' event within 2 minutes after a successful sign-in from an IP never seen for that user in the lookback window, and where the registration originates from that same new IP (rogue device persistence after token replay).
Detects the Mir0Auth phishing kit sequence within a single HTTP flow: POST /task_queue.cs beacon followed by POST /context.go device-code request, both with application/octet-stream bodies. Requires both requests (flowbits) and exact path endings to limit false positives. SIDs made unique.
Detects repeated octet-stream POST polling of /window.rs (5+ in 20s, alerting once per window), matching the ~3s Mir0Auth session polling while the victim completes device login. SID de-duplicated from another rule.
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