Qakbot Discovery Activies

Back


Id	ba9db6b2-3d05-42ae-8aee-3a15bbe29f27
Rulename	Qakbot Discovery Activies
Description	This query searches for injected processes launching discovery activity. Qakbot has been observed leading to ransomware in numerous instances. It looks for discovery commands such as net.exe, whoami.exe, nslookup.exe, netstat.exe, arp.exe, and ping.exe.
Severity	Medium
Tactics	DefenseEvasion Discovery Execution
Techniques	T1140 T1010 T1059
Required data connectors	MicrosoftThreatProtection
Kind	Scheduled
Query frequency	1h
Query period	1h
Trigger threshold	0
Trigger operator	gt
Source Uri	https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/Ransomware/QakbotDiscoveryActivities.yaml
Version	1.0.0
Arm template	ba9db6b2-3d05-42ae-8aee-3a15bbe29f27.json

KQL

DeviceProcessEvents 
| where InitiatingProcessFileName in~('mobsync.exe','explorer.exe')
| where (FileName =~ 'net.exe' and InitiatingProcessCommandLine has_all('view','/all'))
     or (FileName =~ 'whoami.exe' and InitiatingProcessCommandLine has '/all')
     or (FileName =~ 'nslookup.exe' and InitiatingProcessCommandLine has_all('querytype=ALL','timeout=10'))
     or (FileName =~ 'netstat.exe' and InitiatingProcessCommandLine has '-nao')
     or (FileName =~ 'arp.exe' and InitiatingProcessCommandLine has '-a')
     or (FileName =~ 'ping.exe' and InitiatingProcessCommandLine has '-t' and InitiatingProcessCommandLine endswith '127.0.0.1')
| summarize DiscoveryCommands = dcount(InitiatingProcessCommandLine), make_set(InitiatingProcessFileName), make_set(FileName), make_set(InitiatingProcessCommandLine) by DeviceId, DeviceName, bin(TimeGenerated, 5m)   
| where DiscoveryCommands >= 3
| extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)
| extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), "")

YAML

name: Qakbot Discovery Activies
kind: Scheduled
tags:
- Ransomware
- Qakbot
- Discovery
tactics:
- DefenseEvasion
- Discovery
- Execution
triggerThreshold: 0
triggerOperator: gt
version: 1.0.0
status: Available
queryFrequency: 1h
id: ba9db6b2-3d05-42ae-8aee-3a15bbe29f27
requiredDataConnectors:
- connectorId: MicrosoftThreatProtection
  dataTypes:
  - DeviceProcessEvents
relevantTechniques:
- T1140
- T1010
- T1059
description: |
    This query searches for injected processes launching discovery activity. Qakbot has been observed leading to ransomware in numerous instances. It looks for discovery commands such as net.exe, whoami.exe, nslookup.exe, netstat.exe, arp.exe, and ping.exe.
entityMappings:
- entityType: Host
  fieldMappings:
  - columnName: DeviceName
    identifier: FullName
  - columnName: HostName
    identifier: HostName
  - columnName: DnsDomain
    identifier: DnsDomain
OriginalUri: https://github.com/Azure/Azure-Sentinel/blob/master/Solutions/Microsoft Defender XDR/Analytic Rules/Ransomware/QakbotDiscoveryActivities.yaml
queryPeriod: 1h
severity: Medium
query: |
  DeviceProcessEvents 
  | where InitiatingProcessFileName in~('mobsync.exe','explorer.exe')
  | where (FileName =~ 'net.exe' and InitiatingProcessCommandLine has_all('view','/all'))
       or (FileName =~ 'whoami.exe' and InitiatingProcessCommandLine has '/all')
       or (FileName =~ 'nslookup.exe' and InitiatingProcessCommandLine has_all('querytype=ALL','timeout=10'))
       or (FileName =~ 'netstat.exe' and InitiatingProcessCommandLine has '-nao')
       or (FileName =~ 'arp.exe' and InitiatingProcessCommandLine has '-a')
       or (FileName =~ 'ping.exe' and InitiatingProcessCommandLine has '-t' and InitiatingProcessCommandLine endswith '127.0.0.1')
  | summarize DiscoveryCommands = dcount(InitiatingProcessCommandLine), make_set(InitiatingProcessFileName), make_set(FileName), make_set(InitiatingProcessCommandLine) by DeviceId, DeviceName, bin(TimeGenerated, 5m)   
  | where DiscoveryCommands >= 3
  | extend HostName = iff(DeviceName has '.', substring(DeviceName, 0, indexof(DeviceName, '.')), DeviceName)
  | extend DnsDomain = iff(DeviceName has '.', substring(DeviceName, indexof(DeviceName, '.') + 1), "")

ARM