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Potential APT FIN7 Reconnaissance/POWERTRASH Related Activity

Status
test
Severity
high
Log source
category process_creation, product windows
Author
Nasreddine Bencherchali (Nextron Systems)
Source
github.com/SigmaHQ/sigma

Detects specific command line execution used by FIN7 as reported by WithSecureLabs for reconnaissance and POWERTRASH execution

Known false positives

  • Unlikely

MITRE ATT&CK coverage

TacticTechniques
ExecutionNo specific technique

Telemetry coverage

ProviderRecord / event type
SysmonEvent ID 1: Process creation
Security-AuditingEvent ID 4688: A new process has been created.

Rule body

title: Potential APT FIN7 Reconnaissance/POWERTRASH Related Activity
id: 911389c7-5ae3-43ea-bab3-a947ebdeb85e
status: test
description: Detects specific command line execution used by FIN7 as reported by WithSecureLabs for reconnaissance and POWERTRASH execution
references:
    - https://labs.withsecure.com/publications/fin7-target-veeam-servers
    - https://labs.withsecure.com/publications/fin7-target-veeam-servers/jcr:content/root/responsivegrid/responsivegrid/responsivegrid/image_253944286.img.png/1682500394900.png
    - https://github.com/WithSecureLabs/iocs/blob/344203de742bb7e68bd56618f66d34be95a9f9fc/FIN7VEEAM/iocs.csv
author: Nasreddine Bencherchali (Nextron Systems)
date: 2023-05-04
tags:
    - attack.execution
    - attack.g0046
    - detection.emerging-threats
logsource:
    category: process_creation
    product: windows
detection:
    selection_1:
        CommandLine|contains|all:
            - '-noni -nop -exe bypass -f \\\\'
            - 'ADMIN$'
    selection_2:
        CommandLine|contains|all:
            - '-ex bypass -noprof -nolog -nonint -f'
            - 'C:\Windows\Temp\'
    condition: 1 of selection_*
falsepositives:
    - Unlikely
level: high

Stages and Predicates

Stage 0: condition

1 of selection_*

Stage 1: selection_1

selection_1:
    CommandLine|contains|all:
        - '-noni -nop -exe bypass -f \\\\'
        - 'ADMIN$'

Stage 2: selection_2

selection_2:
    CommandLine|contains|all:
        - '-ex bypass -noprof -nolog -nonint -f'
        - 'C:\Windows\Temp\'

Indicators

These rows show field, operator, and value matches.

FieldKindValuesSearch
CommandLinematch
  • -ex bypass -noprof -nolog -nonint -f
  • -noni -nop -exe bypass -f \\\\
  • ADMIN$
  • C:\Windows\Temp\ corpus 7 (sigma 7)
field:"CommandLine" kind:match