Yamato Security
55 lines
1.8 KiB
YAML
55 lines
1.8 KiB
YAML
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title: Ngrok Usage
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author: Florian Roth
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date: 2021/05/14
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description: Detects the use of Ngrok, a utility used for port forwarding and tunneling,
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often used by threat actors to make local protected services publicly available.
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Involved domains are bin.equinox.io for download and *.ngrok.io for connections.
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detection:
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SELECTION_1:
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EventID: 1
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SELECTION_2:
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CommandLine:
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- '* tcp 139*'
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- '* tcp 445*'
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- '* tcp 3389*'
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- '* tcp 5985*'
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- '* tcp 5986*'
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SELECTION_3:
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CommandLine: '* start *'
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SELECTION_4:
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CommandLine: '*--all*'
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SELECTION_5:
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CommandLine: '*--config*'
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SELECTION_6:
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CommandLine: '*.yml*'
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SELECTION_7:
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Image:
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- '*ngrok.exe'
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SELECTION_8:
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CommandLine:
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- '* tcp *'
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- '* http *'
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- '* authtoken *'
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condition: (SELECTION_1 and (SELECTION_2 or (SELECTION_3 and SELECTION_4 and SELECTION_5
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and SELECTION_6) or (SELECTION_7 and SELECTION_8)))
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falsepositives:
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- Another tool that uses the command line switches of Ngrok
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- ngrok http 3978 (https://docs.microsoft.com/en-us/azure/bot-service/bot-service-debug-channel-ngrok?view=azure-bot-service-4.0)
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id: ee37eb7c-a4e7-4cd5-8fa4-efa27f1c3f31
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level: high
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logsource:
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category: process_creation
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product: windows
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modified: 2021/06/07
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references:
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- https://ngrok.com/docs
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- https://www.fireeye.com/blog/threat-research/2021/05/shining-a-light-on-darkside-ransomware-operations.html
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- https://stackoverflow.com/questions/42442320/ssh-tunnel-to-ngrok-and-initiate-rdp
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- https://www.virustotal.com/gui/file/58d21840d915aaf4040ceb89522396124c82f325282f805d1085527e1e2ccfa1/detection
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- https://cybleinc.com/2021/02/15/ngrok-platform-abused-by-hackers-to-deliver-a-new-wave-of-phishing-attacks/.
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status: experimental
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tags:
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- attack.command_and_control
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- attack.t1572
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