Cloud lateral movement
In the cloud, identities can assume roles — temporarily take on another identity's rights. It's built for legitimate delegation, but it becomes lateral movement when an attacker who got one identity chains the steps: identity A can become B, B can become C with more rights, C reaches another account. No new password at each step — just inherited delegation.
Term
description · examples · notesIn the cloud, identities can assume roles — temporarily take on another identity's rights. It's built for legitimate delegation, but it becomes lateral movement when an attacker who got one identity chains the steps: identity A can become B, B can become C with more rights, C reaches another account. No new password at each step — just inherited delegation.
Description
How: an over-broad trust relationship ('anyone can assume this role'), a service account that can escalate, cross-account roles set up loosely for convenience. The attacker maps who-can-become-whom and walks the chain to the rights they want.
The consequence is that a single foothold in a low-value identity becomes admin in a different account. There's no wall to breach — the permission graph itself allows the movement, which is why it's quiet.
Examples
- A small business sets up a role 'anyone can assume'; the attacker takes it from a low-value account, then the next one through it, up to admin.
- A bank links accounts across environments for convenience; the attacker chains role assumptions from the test environment into production.
- A distributor has a service account allowed to become admin 'just in case'; that 'just in case' is exactly the attacker's path.
Notes
- Here you don't breach the network, you walk through permissions — the movement is quiet because the system considers it allowed.
- The 'who can become whom' map matters more than the network map; the attacker draws it before you do.
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Threats
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Defenses
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