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Arnold Chan

@slaz
Trusted contributorCompletionist
2 followers2,100 downloads4,385 copies51 likes26,175 views

7,555 detections

Detects several potentially malicious activities related to Active Directory Certificate Services (AD CS). This includes high volumes of failed requests (potential enumeration), requests for sensitive templates (privilege escalation), and potential impersonation attempts using Subject Alternative Names (SANs). These activities are associated with AD CS abuse techniques.
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Arnold Chan@slaz
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Midnight Slayer
2 months ago
109
This rule identifies potentially compromised Entra ID accounts by correlating multiple suspicious behaviors within a 14-day window. It aggregates four specific indicators: successful authentication following repeated MFA failures, impossible travel (sign-ins from multiple countries within a short timeframe), unusual hour logons (00:00-05:00), and sign-ins flagged with medium/high risk or reported as compromised. The rule triggers when an account exhibits two or more of these distinct anomalous behaviors.
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Arnold Chan@slaz
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Midnight Slayer
2 months ago
809
Detects suspicious DLL loads or file drops performed by security product processes (avp.exe, MsMpEng.exe) from directories outside of standard, trusted vendor paths. It specifically flags unsigned or invalidly signed DLLs, which is indicative of DLL sideloading techniques used to abuse security software workflows for potential privilege escalation.
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Arnold Chan@slaz
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Midnight Slayer
2 months ago
009
Detects the placement of potentially malicious executable or script files onto a network share followed by the execution of that specific file path from a different host within a short timeframe. This behavior is indicative of lateral movement using tainted shared content.
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Arnold Chan@slaz
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Detection & Hunting Community
2 months ago
107
This rule detects a sequence of suspicious activities involving files placed in 'ProgramData\Firefox'. It identifies the creation or modification of a non-standard executable within this folder, followed by its execution by a trusted process (or itself), and the subsequent creation of a Registry run key for persistence. This pattern is often used by adversaries for persistence mechanism implementation using masqueraded file names.
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Arnold Chan@slaz
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Detection & Hunting Community
2 months ago
000
This rule detects a sequence of suspicious activities involving files placed in 'ProgramData\Firefox'. It identifies the creation or modification of a non-standard executable within this folder, followed by its execution by a trusted process (or itself), and the subsequent creation of a Registry run key for persistence. This pattern is often used by adversaries for persistence mechanism implementation using masqueraded file names.
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Arnold Chan@slaz
Defender - KQL
2 months ago
000
This rule detects a sequence of suspicious activities involving files placed in 'ProgramData\Firefox'. It identifies the creation or modification of a non-standard executable within this folder, followed by its execution by a trusted process (or itself), and the subsequent creation of a Registry run key for persistence. This pattern is often used by adversaries for persistence mechanism implementation using masqueraded file names.
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Arnold Chan@slaz
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Detections.ai Community
2 months ago
000
This rule detects DNS queries for the hardcoded domain 'gsx.uk.com', which is associated with the command-and-control (C2) infrastructure of BabylonRAT malware.
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Arnold Chan@slaz
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Midnight Slayer
2 months ago
000
This rule detects DNS queries for the hardcoded domain 'gsx.uk.com', which is associated with the command-and-control (C2) infrastructure of BabylonRAT malware.
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Arnold Chan@slaz
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Detection & Hunting Community
2 months ago
000
This rule detects the creation or modification of a file named 'ClipBoard.txt' within the directory 'AppData\Roaming\ConfigsEx\', as well as the creation of the 'ConfigsEx' directory using command-line tools. This behavior is indicative of an adversary staging sensitive information, such as harvested clipboard data, for potential exfiltration.
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Arnold Chan@slaz
Defender - KQL
2 months ago
000
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