Network Reconnaissance Activity

Hunt Hypothesis

Detects a set of suspicious network related commands often used in recon stages

Detection Rule

Sigma (Original)

title: Network Reconnaissance Activity
id: e6313acd-208c-44fc-a0ff-db85d572e90e
status: test
description: Detects a set of suspicious network related commands often used in recon stages
references:
    - https://thedfirreport.com/2022/02/07/qbot-likes-to-move-it-move-it/
author: Florian Roth (Nextron Systems)
date: 2022-02-07
tags:
    - attack.discovery
    - attack.t1087
    - attack.t1082
    - car.2016-03-001
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        CommandLine|contains|all:
            - 'nslookup'
            - '_ldap._tcp.dc._msdcs.'
    condition: selection
falsepositives:
    - False positives depend on scripts and administrative tools used in the monitored environment
level: high

KQL (Azure Sentinel)

imProcessCreate
| where TargetProcessCommandLine contains "nslookup" and TargetProcessCommandLine contains "_ldap._tcp.dc._msdcs."

Required Data Sources

False Positive Guidance

• False positives depend on scripts and administrative tools used in the monitored environment

MITRE ATT&CK Context

• Tactic: Discovery
• Technique: T1087 — T1087
• Technique: T1082 — T1082

References

• https://thedfirreport.com/2022/02/07/qbot-likes-to-move-it-move-it/
• SigmaHQ Rule