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GWS - Workspace Pentesting

{% hint style="success" %} Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
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Entry Points

Google Platforms and OAuth Apps Phishing

Check how you could use different Google platforms such as Drive, Chat, Groups... to send the victim a phishing link and how to perform a Google OAuth Phishing in:

{% content-ref url="gws-google-platforms-phishing/" %} gws-google-platforms-phishing {% endcontent-ref %}

Password Spraying

In order to test passwords with all the emails you found (or you have generated based in a email name pattern you might have discover) you could use a tool like https://github.com/ustayready/CredKing (although it looks unmaintained) which will use AWS lambdas to change IP address.

Post-Exploitation

If you have compromised some credentials or the session of the user you can perform several actions to access potential sensitive information of the user and to try to escala privileges:

{% content-ref url="gws-post-exploitation.md" %} gws-post-exploitation.md {% endcontent-ref %}

GWS <-->GCP Pivoting

Read more about the different techniques to pivot between GWS and GCP in:

{% content-ref url="../gcp-security/gcp-to-workspace-pivoting/" %} gcp-to-workspace-pivoting {% endcontent-ref %}

GWS <--> GCPW | GCDS | Directory Sync (AD & EntraID)

  • GCPW (Google Credential Provider for Windows): This is the single sign-on that Google Workspaces provides so users can login in their Windows PCs using their Workspace credentials. Moreover, this will store tokens to access Google Workspace in some places in the PC.
  • GCDS (Google CLoud DIrectory Sync): This is a tool that can be used to sync your active directory users and groups to your Workspace. The tool requires the credentials of a Workspace superuser and privileged AD user. So, it might be possible to find it inside a domain server that would be synchronising users from time to time.
  • Admin Directory Sync: It allows you to synchronize users from AD and EntraID in a serverless process from https://admin.google.com/ac/sync/externaldirectories.

{% content-ref url="gws-workspace-sync-attacks-gcpw-gcds-gps-directory-sync-with-ad-and-entraid/" %} gws-workspace-sync-attacks-gcpw-gcds-gps-directory-sync-with-ad-and-entraid {% endcontent-ref %}

Persistence

If you have compromised some credentials or the session of the user check these options to maintain persistence over it:

{% content-ref url="gws-persistence.md" %} gws-persistence.md {% endcontent-ref %}

Account Compromised Recovery

  • Log out of all sessions
  • Change user password
  • Generate new 2FA backup codes
  • Remove App passwords
  • Remove OAuth apps
  • Remove 2FA devices
  • Remove email forwarders
  • Remove emails filters
  • Remove recovery email/phones
  • Removed malicious synced smartphones
  • Remove bad Android Apps
  • Remove bad account delegations

References

{% hint style="success" %} Learn & practice AWS Hacking:HackTricks Training AWS Red Team Expert (ARTE)
Learn & practice GCP Hacking: HackTricks Training GCP Red Team Expert (GRTE)

Support HackTricks
{% endhint %}