Arnold Chan
@slazTrusted contributorCompletionist
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This rule detects the Kothamine dropper chain by correlating network connections or command-line activity fetching payloads from a specific GitHub repository ('cphc811-ui/new-tails') with the subsequent creation of associated malicious files (e.g., tailscale-related binaries, injector DLLs) on the same host within a one-hour window.
This rule detects the Kothamine dropper chain by correlating network connections or command-line activity fetching payloads from a specific GitHub repository ('cphc811-ui/new-tails') with the subsequent creation of associated malicious files (e.g., tailscale-related binaries, injector DLLs) on the same host within a one-hour window.
Detects anomalous file manipulation behavior consistent with the Kothamine agent, characterized by rapid create, write, and delete cycles on a single file. The detection specifically targets processes identified as either explorer.exe with a reflected Kothamine DLL module or the standalone MicrosoftEdgeUpdateCore.exe loader running from an AppData staging path.
Detects anomalous file manipulation behavior consistent with the Kothamine agent, characterized by rapid create, write, and delete cycles on a single file. The detection specifically targets processes identified as either explorer.exe with a reflected Kothamine DLL module or the standalone MicrosoftEdgeUpdateCore.exe loader running from an AppData staging path.
Detects anomalous file manipulation behavior consistent with the Kothamine agent, characterized by rapid create, write, and delete cycles on a single file. The detection specifically targets processes identified as either explorer.exe with a reflected Kothamine DLL module or the standalone MicrosoftEdgeUpdateCore.exe loader running from an AppData staging path.
Detects unauthorized access to Windows camera or microphone consent store registry keys by either a suspected Kothamine agent masquerading as 'MicrosoftEdgeUpdateCore.exe' or an injected 'explorer.exe'. The rule correlates these registry access events with the presence of specific Kothamine-related file artifacts (MicrosoftEdgeUpdateCore.dll and tailcat.exe) on the same host within a 24-hour window to minimize noise.
Detects unauthorized access to Windows camera or microphone consent store registry keys by either a suspected Kothamine agent masquerading as 'MicrosoftEdgeUpdateCore.exe' or an injected 'explorer.exe'. The rule correlates these registry access events with the presence of specific Kothamine-related file artifacts (MicrosoftEdgeUpdateCore.dll and tailcat.exe) on the same host within a 24-hour window to minimize noise.
Detects unauthorized access to Windows camera or microphone consent store registry keys by either a suspected Kothamine agent masquerading as 'MicrosoftEdgeUpdateCore.exe' or an injected 'explorer.exe'. The rule correlates these registry access events with the presence of specific Kothamine-related file artifacts (MicrosoftEdgeUpdateCore.dll and tailcat.exe) on the same host within a 24-hour window to minimize noise.
Detects the initialization and persistence of a 'tailcat.exe' process operating from a non-standard, user-profile directory, typically mimicking legitimate tools. The rule monitors for the specific 'forward' command-line argument containing port mapping strings, an immediate loopback connection to that port, and subsequent periodic external network keep-alive traffic originating from the same process or parent lineage, indicating a C2 tunnel setup.
Detects the initialization and persistence of a 'tailcat.exe' process operating from a non-standard, user-profile directory, typically mimicking legitimate tools. The rule monitors for the specific 'forward' command-line argument containing port mapping strings, an immediate loopback connection to that port, and subsequent periodic external network keep-alive traffic originating from the same process or parent lineage, indicating a C2 tunnel setup.
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