Author: venkat

Venkat is founder of FlexibleIR. He brings 20 years of experience in building tools and products at Sun Microsystems, Intel, Novell, HP, Yahoo,Tesco and startups. He has developed test suites and frameworks for post silicon validation of the Xeon processor family (Fuzzing). He has worked deeply on UFS files system at SUN Microsystem. Was a security paranoid at Yahoo.
June 30, 2020

SoC SIEM Use Cases

The use cases are critical to identifying any of the early, middle, and end-stage operations of the adversary. A small abnormal event can be a clue to a larger attack. There also needs to be a Playbook on how to respond. What are Use Cases A use case can be technical rules or condition applied on logs which are ingested into the SIEM. Eg – […]

May 16, 2020

ICS SCADA Use cases

Attacks related to Industrial Control Systems are complex. There is an urgent need to share information, get support for incident analysis and mitigation, and coordinate messaging for incidents that require communication with customers and the public.

May 8, 2020

Playbook for attack on Salt servers

Nov3, 2020 – New vulnerabilities revealed. The fixed versions include 3002.1, 3001.3, and 3000.5 depending on what branch of Salt you are using. The company has also made patches available for older versions, such as 2019.x.  https://www.bleepingcomputer.com/news/security/saltstack-reveals-new-critical-vulnerabilities-patch-now/ Older vulnerabilities – The hackers use CVE-2020-11651 (an authentication bypass) and CVE-2020-11652 (a directory traversal) to take control over Salt master server Mitigations Below are for older bug fixes related […]

April 25, 2020

Incident Response : Line of investigation

A typical incident could have multiple lines of investigation to get a clear understanding and scope of the attack. It is important to capture each of these train of thoughts or hypothesis. Zero day attacks are typical scenarios where multiple approaches with independent short teams need to be run in parallel. Standardized processes are not enough for responding to every security alert. Apart from running […]

April 24, 2020

Incident Response : Mitigation tasks library

The objective is to have a set of standard and common containment and mitigation tasks that gets applied during a response. While handling an adversary it helps to know what all steps we can possibly do and then accordingly take action based on which part of the kill chain the adversary is in. Reasoning – The adversary keeps changing their tactics and techniques. They have […]