> 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/globally-uncommon-image-load-from-a-signed-process.md).
# Globally uncommon image load from a signed process
### Synopsis
| Field | Value |
| -------------------- | ----------------------------------------------------------------------------- |
| Activation Period | 14 Days |
| Training Period | 30 Days |
| Test Period | N/A (single event) |
| Deduplication Period | 1 Day |
| Required Data | XDR Agent |
| Detector Tags | Global Anomaly Analytics, DLL Hijacking Analytics |
| ATT\&CK Tactic | Stealth (TA0005) |
| ATT\&CK Technique | System Binary Proxy Execution (T1218), Hijack Execution Flow: DLL (T1574.001) |
| Severity | Informational |
### Description
A signed process loaded a DLL that, on a global level, it usually doesn't load.
### Attacker's Goals
Attackers may use various methods to execute code in the context of a signed process to avoid detection.
### Investigative actions
* Check if the actor process loaded a suspicious DLL before the alert.
* Check if the actor process was injected before the alert.
* Check if the process execution and connections are legitimate.
### Variations
Globally uncommon image load from a signed process from a known vendor
**Synopsis**
| Field | Value |
| ----------------- | ----------------------------------------------------------------------------- |
| ATT\&CK Tactic | Stealth (TA0005) |
| ATT\&CK Technique | System Binary Proxy Execution (T1218), Hijack Execution Flow: DLL (T1574.001) |
| Severity | Medium |
**Description**
A signed process loaded a DLL that, on a global level, it usually doesn't load.
**Attacker's Goals**
Attackers may use various methods to execute code in the context of a signed process to avoid detection.
**Investigative actions**
* Check if the actor process loaded a suspicious DLL before the alert.
* Check if the actor process was injected before the alert.
* Check if the process execution and connections are legitimate.
Globally uncommon unsigned image side loaded to a signed process
**Synopsis**
| Field | Value |
| ----------------- | ----------------------------------------------------------------------------- |
| ATT\&CK Tactic | Stealth (TA0005) |
| ATT\&CK Technique | System Binary Proxy Execution (T1218), Hijack Execution Flow: DLL (T1574.001) |
| Severity | Medium |
**Description**
A signed process side loaded an unsigned DLL that, on a global level, it usually doesn't load.
**Attacker's Goals**
Attackers may use various methods to execute code in the context of a signed process to avoid detection.
**Investigative actions**
* Check if the actor process loaded a suspicious DLL before the alert.
* Check if the actor process was injected before the alert.
* Check if the process execution and connections are legitimate.
Globally uncommon and very rare image load from a signed process
**Synopsis**
| Field | Value |
| ----------------- | ----------------------------------------------------------------------------- |
| ATT\&CK Tactic | Stealth (TA0005) |
| ATT\&CK Technique | System Binary Proxy Execution (T1218), Hijack Execution Flow: DLL (T1574.001) |
| Severity | Medium |
**Description**
A signed process loaded a DLL that, on a global level, it usually doesn't load.
**Attacker's Goals**
Attackers may use various methods to execute code in the context of a signed process to avoid detection.
**Investigative actions**
* Check if the actor process loaded a suspicious DLL before the alert.
* Check if the actor process was injected before the alert.
* Check if the process execution and connections are legitimate.
Globally uncommon image load from an injected thread in a signed process
**Synopsis**
| Field | Value |
| ----------------- | -------------------------------------------------------------------------------------------------------- |
| ATT\&CK Tactic | Stealth (TA0005) |
| ATT\&CK Technique | System Binary Proxy Execution (T1218), Hijack Execution Flow: DLL (T1574.001), Process Injection (T1055) |
| Severity | Low |
**Description**
An injected thread in a signed process loaded a DLL that, on a global level, it usually doesn't load.
**Attacker's Goals**
Attackers may use various methods to execute code in the context of a signed process to avoid detection.
**Investigative actions**
* Check if the actor process loaded a suspicious DLL before the alert.
* Check if the actor process was injected before the alert.
* Check if the process execution and connections are legitimate.
Globally uncommon DLL was downloaded from an uncommon source and loaded by a signed process
**Synopsis**
| Field | Value |
| ----------------- | ----------------------------------------------------------------------------- |
| ATT\&CK Tactic | Stealth (TA0005) |
| ATT\&CK Technique | System Binary Proxy Execution (T1218), Hijack Execution Flow: DLL (T1574.001) |
| Severity | Low |
**Description**
A signed process loaded a DLL that, on a global level, it usually doesn't load.
**Attacker's Goals**
Attackers may use various methods to execute code in the context of a signed process to avoid detection.
**Investigative actions**
* Check if the actor process loaded a suspicious DLL before the alert.
* Check if the actor process was injected before the alert.
* Check if the process execution and connections are legitimate.
---
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