Az - Table Storage

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Basic Information

Azure Table Storage is a NoSQL key-value store designed for storing large volumes of structured, non-relational data. It offers high availability, low latency, and scalability to handle large datasets efficiently. Data is organized into tables, with each entity identified by a partition key and row key, enabling fast lookups. It supports features like encryption at rest, role-based access control, and shared access signatures for secure, managed storage suitable for a wide range of applications.

There isn’t built-in backup mechanism for table storage.

Keys

PartitionKey

  • The PartitionKey groups entities into logical partitions. Entities with the same PartitionKey are stored together, which improves query performance and scalability.
  • Example: In a table storing employee data, PartitionKey might represent a department, e.g., "HR" or "IT".

RowKey

  • The RowKey is the unique identifier for an entity within a partition. When combined with the PartitionKey, it ensures that each entity in the table has a globally unique identifier.
  • Example: For the "HR" partition, RowKey might be an employee ID, e.g., "12345".

Other Properties (Custom Properties)

  • Besides the PartitionKey and RowKey, an entity can have additional custom properties to store data. These are user-defined and act like columns in a traditional database.
  • Properties are stored as key-value pairs.
  • Example: Name, Age, Title could be custom properties for an employee.

Enumeration

# Get storage accounts
az storage account list

# List tables
az storage table list --account-name <name>

# Read table
az storage entity query \
  --account-name <name> \
  --table-name <t-name> \
  --top 10

# Write table
az storage entity insert \
  --account-name <STORAGE_ACCOUNT_NAME> \
  --table-name <TABLE_NAME> \
  --entity PartitionKey=<PARTITION_KEY> RowKey=<ROW_KEY> <PROPERTY_KEY>=<PROPERTY_VALUE>

# Write example
az storage entity insert \
  --account-name mystorageaccount \
  --table-name mytable \
  --entity PartitionKey=HR RowKey=12345 Name="John Doe" Age=30 Title="Manager"

# Update row
az storage entity merge \
  --account-name mystorageaccount \
  --table-name mytable \
  --entity PartitionKey=pk1 RowKey=rk1 Age=31

Note

By default az cli will use an account key to sign a key and perform the action. To use the Entra ID principal privileges use the parameters --auth-mode login.

Tip

Use the param --account-key to indicate the account key to use
Use the param --sas-token with the SAS token to access via a SAS token

Privilege Escalation

Same as storage privesc:

Az - Storage Privesc

Post Exploitation

Az - Table Storage Post Exploitation

Persistence

Same as storage persistence:

Az - Storage Persistence

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