Emerging Threathightest

Potential APT FIN7 POWERHOLD Execution

Detects execution of the POWERHOLD script seen used by FIN7 as reported by WithSecureLabs

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Launch
Nasreddine Bencherchali (Nextron Systems)Created Thu May 0471c432c4-e4da-4eab-ba49-e60ea9a81bca2023
Emerging Threat
Active Threat

Developed to detect an active or emerging threat. Prioritize investigation of any alerts and correlate with threat intelligence.

Log Source
WindowsPowerShell Script
ProductWindows← raw: windows
CategoryPowerShell Script← raw: ps_script

Definition

bade5735-5ab0-4aa7-a642-a11be0e40872

Detection Logic
Detection Logic1 selector
detection:
    selection:
        ScriptBlockText|contains|all:
            - '$env:APPDATA'
            - 'function MainPayload'
            - '::WriteAllBytes'
            - 'wscript.exe'
    condition: selection
False Positives
Unknown

False positive likelihood has not been assessed. Additional context may be needed during triage.

MITRE ATT&CK

Other

detection.emerging-threats
Rule Metadata
Rule ID
71c432c4-e4da-4eab-ba49-e60ea9a81bca
Status
test
Level
high
Type
Emerging Threat
Created
Thu May 04
Path
rules-emerging-threats/2023/TA/FIN7/posh_ps_apt_fin7_powerhold.yml
Raw Tags
attack.executionattack.t1059.001attack.g0046detection.emerging-threats
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