Track Common Adversary Tasks Performed Using BITSAdmin

By Ashwin Venugopal -

 





To know more about it, you can go through my detailed document by clicking here





Overview

BITSAdmin (Background Intelligent Transfer Service Admin) is a command-line tool that can create as well as manage BITS jobs. It is generally used to download files from or upload files to HTTP web servers and SMB file shares. It can also manage network interruptions, pausing and automatically resuming transfers, even after a reboot.

How Does It Works?

BITSAdmin consists of two switches, viz., '/transfer', and '/addfile' whom working profile is similar to each other while their style of working is quite different. As BITSAdmin downloads files in the form of jobs, these jobs must be defined before moving on; which can be done via various switches.

Detection

Regular monitoring of the logs for the usage of the BITSAdmin tools and gaining information regarding the transfers through QMGR Database are some of the ways to detect them. However, it was very difficult to detect BITS transfers in the past before BITSAdmin was introduced in the Windows Defender Real-Time Scan as scanning through logs was the only other method to do that.

Mitigation

The following measures can help in mitigating cyberthreat:
  • Modify network and/or host firewall rules.
  • Allow only the legitimate BITS traffic by properly controlling the network.
  • Limit the external access of the BITSAdmin interface to specific users or groups.

 







To know more about it, you can go through my detailed document by clicking here


























































Comments

Post a Comment

Popular posts from this blog

Deployment (Part 3)

By Ashwin Venugopal -
Image
  To read part 1, please click  here To read part 2, please click  here Microsoft Monitoring Agent (MMA) MMA is used across multiple Microsoft solutions and has undergone a few name changes as its features and functionality have evolved. If it is being considered to be used, then following areas should be covered during a Microsoft Sentinel deployment project: Consider the timelines and the strategy for a migration to AMA (Azure Monitor Agent) before the MMA end-of-life.  Consider the central deployment and management methodology for MMA. Determine which endpoints are in scope for deployment as these affect the log ingestion volume significantly.  Azure Monitor Agent (AMA) Organizations with MMA as the main Microsoft Sentinel agent should start planning the migration to AMA as soon as possible to avoid a rushed migration. One of the main advantages of AMA is the ability to control the log collection policy centrally and apply different policies against different...
Read more

Deployment (Part 1)

By Ashwin Venugopal -
Image
  To read part 2, please click  here To read part 3, please click  here Azure Resources Microsoft Sentinel needs following resources to be created: Subscription (if a dedicated subscription(s) will be used) Resource group(s) Log Analytics workspace(s) Automation rules/playbook Alert rules Workbooks Microsoft Sentinel offers hundreds of alert rules, workbooks, and automation playbook templates along with hunting scripts. The templates can be used to activate/deploy schedule alerts, create customized dashboards, create automation playbooks and perform threat-hunting activities. Generally, once deployed, the resources created have to be adjusted to match the existing environment, configure local credentials, etc. Methods of deployment: Manual- Administrator can manually configures the Microsoft Sentinel resources with the help of Azure portal. Any manual process has the inherent risks of human operator error, lack of compliance with potential change control procedures, and u...
Read more

Design Planning (Part 3)

By Ashwin Venugopal -
Image
  To read part 1, please click  here To read part 2, please click  here Complex Organizational Structures SIEM can be an expensive security control, hence, it is common multiple businesses to contribute to the overall expense. Various organizational units may require a level of access to specific dashboards or sets of data. Microsoft Sentinel offers the ability to assign table-level permissions and limit the level of access to the minimum required to perform requisite job functions.  Role-based Access Control (RBAC) Requirements Microsoft Sentinel offers an extensive list of Azure built-in roles that can be used to provide granular access according to the job requirements and permitted level of access. Some of them are various Microsoft Sentinel dedicated roles: Microsoft Sentinel Contributor- Can perform all engineering-related configuration, such as creating alert rules, configuring data connectors, and additional similar tasks.  Microsoft Sentinel Reader- Can...
Read more