t1537-transfer-data-to-cloud-account

name	T1537_transfer-data-to-cloud-account
description	Adversaries may exfiltrate data by transferring the data, including through sharing/syncing and creating backups of cloud environments, to another cloud account they control on the same service.
category	client-side
version	18.1
author	cyberstrike-official
tags	["mitre-attack","enterprise","t1537","exfiltration","iaas","office-suite","saas"]
technique_id	T1537
tactic	exfiltration
all_tactics	["exfiltration"]
platforms	["IaaS","Office Suite","SaaS"]
mitre_url	https://attack.mitre.org/techniques/T1537
tech_stack	["cloud","office","saas"]
cwe_ids	["CWE-200"]
chains_with	[]
prerequisites	[]
severity_boost	{}

T1537 Transfer Data to Cloud Account

High-Level Description

Adversaries may exfiltrate data by transferring the data, including through sharing/syncing and creating backups of cloud environments, to another cloud account they control on the same service.

A defender who is monitoring for large transfers to outside the cloud environment through normal file transfers or over command and control channels may not be watching for data transfers to another account within the same cloud provider. Such transfers may utilize existing cloud provider APIs and the internal address space of the cloud provider to blend into normal traffic or avoid data transfers over external network interfaces.

Adversaries may also use cloud-native mechanisms to share victim data with adversary-controlled cloud accounts, such as creating anonymous file sharing links or, in Azure, a shared access signature (SAS) URI.

Incidents have been observed where adversaries have created backups of cloud instances and transferred them to separate accounts.

Kill Chain Phase

• Exfiltration (TA0010)

Platforms: IaaS, Office Suite, SaaS

What to Check

• Identify if Transfer Data to Cloud Account technique is applicable to target environment
• Check IaaS systems for indicators of Transfer Data to Cloud Account
• Check Office Suite systems for indicators of Transfer Data to Cloud Account
• Check SaaS systems for indicators of Transfer Data to Cloud Account
• Verify mitigations are bypassed or absent (4 known mitigations)
• Assess detection coverage (1 detection strategies)

How to Test

Manual Testing

1. Identify Attack Surface: Determine if the target environment is susceptible to Transfer Data to Cloud Account by examining the target platforms (IaaS, Office Suite, SaaS).

2. Assess Existing Defenses: Review whether mitigations for T1537 are in place. If defenses are absent or misconfigured, this technique may be exploitable.

3. Execute Test: Use tools and methods described in the MITRE ATT&CK page and external references below.

Note: No Atomic Red Team tests available for this technique. See for updates.