Detectionlowtest

Decode Base64 Encoded Text -MacOs

Detects usage of base64 utility to decode arbitrary base64-encoded text

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Daniil Yugoslavskiy, oscd.communityCreated Mon Oct 19Updated Sat Nov 26719c22d7-c11a-4f2c-93a6-2cfdd5412f68macos

Log Source

macOSProcess Creation

ProductmacOS← raw: macos

CategoryProcess Creation← raw: process_creation

Events generated when a new process is spawned on the system. Covers command-line arguments, parent/child relationships, and process metadata.

Detection Logic

detection:
    selection:
        Image: '/usr/bin/base64'
        CommandLine|contains: '-d'
    condition: selection

False Positives

Legitimate activities

References

MITRE ATT&CK

Tactics

Techniques

Rule Metadata

Rule ID

719c22d7-c11a-4f2c-93a6-2cfdd5412f68

Status

test

Level

low

Type

Detection

Created

Mon Oct 19

Modified

Sat Nov 26

Author

Path

rules/macos/process_creation/proc_creation_macos_base64_decode.yml

Raw Tags

attack.defense-evasionattack.t1027