Arnold Chan
@slazTrusted contributorCompletionist
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Detects the execution of the Kothamine injector by correlating three distinct stages: the use of PowerShell to create an AV exclusion for 'MicrosoftEdgeUpdateCore', the dropping of the 'MicrosoftEdgeUpdateCore' binary into the user's AppData directory, and subsequent process injection (OpenProcess/VirtualAllocEx/WriteProcessMemory/CreateRemoteThread) into explorer.exe.
Detects the execution of the Kothamine injector by correlating three distinct stages: the use of PowerShell to create an AV exclusion for 'MicrosoftEdgeUpdateCore', the dropping of the 'MicrosoftEdgeUpdateCore' binary into the user's AppData directory, and subsequent process injection (OpenProcess/VirtualAllocEx/WriteProcessMemory/CreateRemoteThread) into explorer.exe.
Detects the execution of the Kothamine injector by correlating three distinct stages: the use of PowerShell to create an AV exclusion for 'MicrosoftEdgeUpdateCore', the dropping of the 'MicrosoftEdgeUpdateCore' binary into the user's AppData directory, and subsequent process injection (OpenProcess/VirtualAllocEx/WriteProcessMemory/CreateRemoteThread) into explorer.exe.
Detects the execution of the Kothamine injector by correlating three distinct stages: the use of PowerShell to create an AV exclusion for 'MicrosoftEdgeUpdateCore', the dropping of the 'MicrosoftEdgeUpdateCore' binary into the user's AppData directory, and subsequent process injection (OpenProcess/VirtualAllocEx/WriteProcessMemory/CreateRemoteThread) into explorer.exe.
Detects the Kothamine UAC-bypass technique, which uses fodhelper.exe to spawn an elevated PowerShell process. The rule monitors for fodhelper.exe being launched without arguments (a common indicator of this bypass) followed immediately by an elevated PowerShell process containing indicators like 'elevated.ps1' or 'TailscalePortable' paths.
Detects the Kothamine UAC-bypass technique, which uses fodhelper.exe to spawn an elevated PowerShell process. The rule monitors for fodhelper.exe being launched without arguments (a common indicator of this bypass) followed immediately by an elevated PowerShell process containing indicators like 'elevated.ps1' or 'TailscalePortable' paths.
Detects anomalous credential access behavior by identifying instances where a compromised explorer.exe process (injected with the Kothamine payload DLL MicrosoftEdgeUpdateCore.dll) accesses browser cookie stores and gaming credential files in quick succession.
Detects anomalous credential access behavior by identifying instances where a compromised explorer.exe process (injected with the Kothamine payload DLL MicrosoftEdgeUpdateCore.dll) accesses browser cookie stores and gaming credential files in quick succession.
Detects anomalous credential access behavior by identifying instances where a compromised explorer.exe process (injected with the Kothamine payload DLL MicrosoftEdgeUpdateCore.dll) accesses browser cookie stores and gaming credential files in quick succession.
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.
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