> For the complete documentation index, see [llms.txt](https://cortex-docs.paloaltonetworks.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cortex-docs.paloaltonetworks.com/analytics-alerts/alerts-by-name/user-added-sid-history-to-an-account.md).
# User added SID History to an account
### Synopsis
| Field | Value |
| -------------------- | ----------------------------------------------------------------------------------------------------------------------------- |
| Activation Period | 14 Days |
| Training Period | 30 Days |
| Test Period | N/A (single event) |
| Deduplication Period | 1 Hour |
| Required Data | Requires one of the following data sources:
Windows Event Collector OR XDR Agent with eXtended Threat Hunting (XTH)
|
| Detection Modules | Identity Analytics |
| ATT\&CK Tactic | Privilege Escalation (TA0004), Defense Evasion (TA0005) |
| ATT\&CK Technique | Access Token Manipulation: SID-History Injection (T1134.005) |
| Severity | Informational |
### Description
A user added SID history to an account. This may be indicative of a user's migration between domains or a SID injection attack.
### Attacker's Goals
Adversaries may use SID history to escalate privileges and bypass access controls.
### Investigative actions
* Verify if migration between domains was involved.
* Search for suspicious actions by the user, such as forged Kerberos tickets.
### Variations
Suspicious SID History Addition
**Synopsis**
| Field | Value |
| ----------------- | ------------------------------------------------------------ |
| ATT\&CK Tactic | Privilege Escalation (TA0004), Defense Evasion (TA0005) |
| ATT\&CK Technique | Access Token Manipulation: SID-History Injection (T1134.005) |
| Severity | Medium |
**Description**
A user added SID history to an account. The account was not migrated between domains, which may indicate a SID injection attack.
**Attacker's Goals**
Adversaries may use SID history to escalate privileges and bypass access controls.
**Investigative actions**
* Verify if migration between domains was involved.
* Search for suspicious actions by the user, such as forged Kerberos tickets.
---
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