je internetový portál zaměřený na počítačovou bezpečnost, hacking, anonymitu, počítačové sítě, programování, šifrování, exploity, Linux a BSD systémy. Provozuje spoustu zajímavých služeb a podporuje příznivce v zajímavých projektech.


Amazon Linux 2023, a Cloud-Optimized Linux Distro, Is Now Available - 25 Březen, 2023 - 12:00
Earlier this week, Amazon announced the availability of Amazon Linux 2023, its third-generation Linux distribution. With this distribution, Amazon is promising three benefits: a high-security standard, a predictable lifecycle, and deterministic updates.
Kategorie: Hacking & Security

S3 Ep127: When you chop someone out of a photo, but there they are anyway…

Sophos Naked Security - 2 hodiny 17 min zpět
Listen now - latest episode. Full transcript inside.

Fake ChatGPT Chrome Browser Extension Caught Hijacking Facebook Accounts

The Hacker News - 3 hodiny 47 min zpět
Google has stepped in to remove a bogus Chrome browser extension from the official Web Store that masqueraded as OpenAI's ChatGPT service to harvest Facebook session cookies and hijack the accounts. The "ChatGPT For Google" extension, a trojanized version of a legitimate open source browser add-on, attracted over 9,000 installations since March 14, 2023, prior to its removal. It was originally Ravie Lakshmanan Security / Artificial Intelligence37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

Nexus: A New Rising Android Banking Trojan Targeting 450 Financial Apps

The Hacker News - 8 hodin 1 min zpět
An emerging Android banking trojan dubbed Nexus has already been adopted by several threat actors to target 450 financial applications and conduct fraud. "Nexus appears to be in its early stages of development," Italian cybersecurity firm Cleafy said in a report published this week. "Nexus provides all the main features to perform ATO attacks (Account Takeover) against banking portals and Ravie Lakshmanan Security / Banking37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

Surveying Software Supply Chain Security - 9 hodin 15 min zpět
Chainguard, the co-creator of Sigstore, has conducted a survey to better understand if and how software supply best practices are utilized by the industry. We take a look at the findings.
Kategorie: Hacking & Security

Business Conditions Prime for More Open-Source Contributors - 9 hodin 15 min zpět
Companies that established open-source program offices over the last few years now need more C-suite oversight to drive education, awareness, and use of open-source software. That sets the stage for an expanded role of open-source program officers.
Kategorie: Hacking & Security

Linux 6.3-rc3 Adding Protection From Malicious Guests Hammering AMD's Secure Processor - 9 hodin 15 min zpět
A change sent in this Sunday ahead of the Linux 6.3-rc3 release is a late addition adding a throttling mechanism to protect the hypervisor from potentially malicious AMD Secure Encrypted Virtualization (SEV) guests. The change is to protect the AMD Secure Processor from being potentially overloaded with requests by nefarious guest VMs.
Kategorie: Hacking & Security

New ShellBot DDoS Malware Variants Targeting Poorly Managed Linux Servers - 9 hodin 15 min zpět
Poorly managed Linux SSH servers are being targeted as part of a new campaign that deploys different variants of a malware called ShellBot.
Kategorie: Hacking & Security

2023 Cybersecurity Maturity Report Reveals Organizational Unpreparedness for Cyberattacks

The Hacker News - 9 hodin 37 min zpět
In 2022 alone, global cyberattacks increased by 38%, resulting in substantial business loss, including financial and reputational damage. Meanwhile, corporate security budgets have risen significantly because of the growing sophistication of attacks and the number of cybersecurity solutions introduced into the market. With this rise in threats, budgets, and solutions, how prepared are industriesThe Hacker News
Kategorie: Hacking & Security

Operation Soft Cell: Chinese Hackers Breach Middle East Telecom Providers

The Hacker News - 10 hodin 47 min zpět
Telecommunication providers in the Middle East are the subject of new cyber attacks that commenced in the first quarter of 2023. The intrusion set has been attributed to a Chinese cyber espionage actor associated with a long-running campaign dubbed Operation Soft Cell based on tooling overlaps. "The initial attack phase involves infiltrating Internet-facing Microsoft Exchange servers to deploy Ravie Lakshmanan Infrastructure Security37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

Developing an incident response playbook

Kaspersky Securelist - 12 hodin 16 min zpět

An incident response playbook is a predefined set of actions to address a specific security incident such as malware infection, violation of security policies, DDoS attack, etc. Its main goal is to enable a large enterprise security team to respond to cyberattacks in a timely and effective manner. Such playbooks help optimize the SOC processes, and are a major step forward to SOC maturity, but can be challenging for a company to develop. In this article, I want to share some insights on how to create the (almost) perfect playbook.

Imagine your company is under a phishing attack — the most common attack type. How many and what exact actions should the incident response team take to curb the attack? The first steps would be to find if an adversary is present and how the infrastructure had been penetrated (whether though an infected attachment or a compromised account using a fake website). Next, we want to investigate what is going on within the incident (whether the adversary persists using scheduled tasks or startup scripts) and execute containment measures to mitigate risks and reduce the damage caused by the attack. All these have to be done in a prompt, calculated and precise manner—with the precision of a chess grandmaster — because the stakes are high when it comes to technological interruptions, data leaks, reputational or financial losses.

Why defining your workflow is a vital prestage of playbook development

Depending on organization, the incident response process will comprise different phases. I will consider one of the most widespread NIST incident response life cycles relevant for most of the large industries — from oil and gas to the automotive sector.

The scheme includes four phases:

  • preparation,
  • detection and analysis,
  • containment, eradication, and recovery,
  • post-incident activity.

All the NIST cycles (or any other incident response workflows) can be broken down into “action blocks”. In turn, the latter can be combined depending on specific attack for a timely and efficient response. Every “action” is a simple instruction that an analyst or an automated script must follow in case of an attack. At Kaspersky, we describe an action as a building block of the form: <a subject> does <an action> on <an object> using <a tool>. This building block describes how a response team or an analyst (<a subject>) will perform a special action (<an action>) on a file, account, IP address, hash, registry key, etc. (<an object>) using systems with the functionality to perform that action (<a tool>).

Defining these actions at each phase of the company’s workflow helps to achieve consistency and create scalable and flexible scenarios, which can be promptly modified to accommodate changes in the infrastructure or any of the conditions.

An example of a common response action

1. Be prepared to process incidents

The first phase of any incident response playbook is devoted to the Preparation phase of the NIST incident response life cycle. Usually the preparation phase includes many different steps such as incident prevention, vulnerability management, user awareness, malware prevention, etc. I will focus on the step involving playbooks and incident response. Within this phase it is vital to define the alert field set and its visual representation. For the response team’s convenience, it is a good idea to prepare different field sets for each incident type.

A good practice before starting is to define the roles specific to the type of incident, as well as the escalation scenarios, and to dedicate the communication tools that will be used to contact the stakeholders (email, phone, instant messenger, SMS, etc.). Additionally, the response team has to be provided with adequate access to security and IT systems, analysis software and resources. For a timely response and to avoid human factor errors, automations and integrations need to be developed and implemented, that can be launched by the security orchestration, automation and response (SOAR) system.

2. Create a comfortable track for investigation

The next important phase is Detection that involves collecting data from IT systems, security tools, public information, and people inside and outside the organization, and identifying the precursors and indicators. The main thing to be done during this phase is configuring a monitoring system to detect specific incident types.

In the Analysis phase, I would like to highlight several blocks: documentation, triage, investigation, and notification. Documentation helps the team to define the fields for analysis and how to fill them once an incident is detected and registered in the incident management system. That done, the response team moves on to triage to perform incident prioritization, categorization, false positive checks, and searches for related incidents. The analyst must be sure that the collected incident data comply with the rules configured for detection of specific suspicious behavior. If the incident data and rule/policy logic mismatch, the incident may be tagged as a false positive.

The main part of the analysis phase is investigation, which comprises logging, assets and artifact enrichment, and incident scope forming. When in research mode, the analyst should be able to collect all the data about the incident to identify patient zero and the entry point — knowing how unauthorized access was obtained and which host/account had been compromised first. It is important because it helps to properly contain the cyberattack and prevent similar ones in the future. By collecting incident data one gets information about specific objects (assets and artifacts such as hostname, IP address, file hash, URL, and so on) relating to the incident, so one can extend the incident scope by them.

Once the incident scope is extended, the analyst can enrich assets and artifacts using the data from Threat Intelligence resources or a local system featuring inventory information, such as Active Directory, IDM, or CMDB. Based on the information on the affected assets, the response team can measure the risk to make the right choice of further actions. Everything depends of how many hosts, users, systems, business processes, or customers have been affected, and there are several ways to escalate the incident. For a medium risk, only the SOC manager and certain administrators must be notified to contain the incident and resolve the issue. In a critical risk case, however, the crisis team, HR department, or the regulatory authority must be notified by the response team.

The last component of the analysis phase is notification, meaning that every stakeholder must be notified of the incident in timely manner, so the system owner can step in with effective containment and recovery measures.

Detection and Analysis phase actions to analyze the incident

3. Containment is one of the most important phases to minimize incident consequences

The following big part consists of Containment, Eradication and Recovery phases. The main goal of containment is to keep the situation under control after an incident has occurred. Based on incident severity and possible damage caused, the response team should know the proper set of containment measures.

Following the prestage where workflows had been defined, we now have a list of different object types and possible actions that can be completed using our tool stack. So, with a list of actions in hand, we just want to choose proper measures based on impact. This stage mostly defines the final damage: the smoother and more precise the actions the playbook suggests for this phase, the prompter will be our response to block the destructive activity and minimize the consequences. During the containment process, the analyst performs a number of different actions: deletes malicious files, prevents their execution, performs network host isolation, disables accounts, scans disks with the help of security software, and more.

The eradication and recovery phases are similar and consist of procedures meant to put the system back into operation. The eradication procedures include cleaning up all traces of the attack—such as malicious files, created scheduled tasks and services—and depend on what traces were left following the intrusion. During the recovery process, the response team should simply adopt a ‘business as usual’ stance. Just as the eradication, the recovery phase is optional, because not every incident impacts the infrastructure. Within this phase we perform certain health check procedures and revoke changes that had been made during the attack.

Incident containment steps and recovery measures

4. Lessons learned, or required post-incident actions

The last playbook phase is Post-incident activity, or Lesson learning. The phase is focused on how to improve the process. To simplify this task, we can define a set of questions to be answered by the incident response team. For example:

  • How well did the incident response team manage the incident?
  • What information was the first to be required?
  • Could the team have done a better job sharing the information with other organizations/departments?
  • What could the team do differently next time if the same incident occurred?
  • What additional tools or resources are needed to help prevent or mitigate similar incidents?
  • Were there any wrong actions that had caused damage or inhibited recovery?

Answering these questions will enable the response team to update the knowledge base, improve the detection and prevention mechanism, and adjust the next response plan.

Summary: components of a good playbook

To develop a cybersecurity incident response playbook, we need to figure out the incident management process with focus on phases. As we go deeper into the details, we look for tools/systems to help us with the detection, investigation, containment, eradication, and recovery phases. Once we know our set of tools, we can define the actions that can be performed:

  • logging;
  • enriching the inventory information or telemetry of affected assets or reputation of external resources;
  • incident containment through host isolation, preventing malicious file execution, URL blocking, termination of active sessions, or disabling of accounts;
  • cleaning up the traces of intrusion by deleting remote files, deleting suspicious services, or scheduled tasks;
  • recovering the system’s operational state by revoking changes;
  • formalizing lessons learned by creating a new article in the local knowledge base for later reference.

Additionally, we want to define responsibilities within the response team, for each team member must know what his or her mission-critical role is. Once the preparation is done, we can begin developing the procedures that will form the playbook. As a common rule, every procedure or playbook building block looks like “<a subject> does <an action> on <an object> using <a tool>”—and now that all subjects, actions, objects, and tools have been defined, it is pretty easy to combine them to create procedures and design the playbook. And of course, keep in mind and stick to your response plan and its phases.

German and South Korean Agencies Warn of Kimsuky's Expanding Cyber Attack Tactics

The Hacker News - 12 hodin 39 min zpět
German and South Korean government agencies have warned about cyber attacks mounted by a threat actor tracked as Kimsuky using rogue browser extensions to steal users' Gmail inboxes. The joint advisory comes from Germany's domestic intelligence apparatus, the Federal Office for the Protection of the Constitution (BfV), and South Korea's National Intelligence Service of the Republic of Korea (NISRavie Lakshmanan Attack / Browser Security37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

Windows 11 also vulnerable to “aCropalypse” image data leakage

Sophos Naked Security - 22 Březen, 2023 - 20:59
Turns out that the Windows 11 Snipping Tool has the same "aCropalypse" data leakage bug as Pixel phones. Here's how to work around the problem...

CISA Alerts on Critical Security Vulnerabilities in Industrial Control Systems

The Hacker News - 22 Březen, 2023 - 14:09
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has released eight Industrial Control Systems (ICS) advisories on Tuesday, warning of critical flaws affecting equipment from Delta Electronics and Rockwell Automation. This includes 13 security vulnerabilities in Delta Electronics' InfraSuite Device Master, a real-time device monitoring software. All versions prior to 1.0.5 are Ravie Lakshmanan Security37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

ScarCruft's Evolving Arsenal: Researchers Reveal New Malware Distribution Techniques

The Hacker News - 22 Březen, 2023 - 13:24
The North Korean advanced persistent threat (APT) actor dubbed ScarCruft is using weaponized Microsoft Compiled HTML Help (CHM) files to download additional malware onto targeted machines. According to multiple reports from AhnLab Security Emergency response Center (ASEC), SEKOIA.IO, and Zscaler, the development is illustrative of the group's continuous efforts to refine and retool its tactics Ravie Lakshmanan Threat Intelligence37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

Preventing Insider Threats in Your Active Directory

The Hacker News - 22 Březen, 2023 - 12:20
Active Directory (AD) is a powerful authentication and directory service used by organizations worldwide. With this ubiquity and power comes the potential for abuse. Insider threats offer some of the most potentials for destruction. Many internal users have over-provisioned access and visibility into the internal network. Insiders' level of access and trust in a network leads to unique The Hacker News Security / Active Directory37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

Intel CET Shadow Stack Support Set To Be Introduced With Linux 6.4 - 22 Březen, 2023 - 12:00
After being in development for years, Intel's shadow stack support is set to be merged for the upcoming Linux 6.4 cycle. The shadow stack support is part of Intel's Control-flow Enforcement Technology (CET) security functionality.
Kategorie: Hacking & Security

Rogue NuGet Packages Infect .NET Developers with Crypto-Stealing Malware

The Hacker News - 22 Březen, 2023 - 09:58
The NuGet repository is the target of a new "sophisticated and highly-malicious attack" aiming to infect .NET developer systems with cryptocurrency stealer malware. The 13 rogue packages, which were downloaded more than 160,000 times over the past month, have since been taken down. "The packages contained a PowerShell script that would execute upon installation and trigger a download of a 'Ravie Lakshmanan / Malware37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

NAPLISTENER: New Malware in REF2924 Group's Arsenal for Bypassing Detection

The Hacker News - 22 Březen, 2023 - 08:19
The threat group tracked as REF2924 has been observed deploying previously unseen malware in its attacks aimed at entities in South and Southeast Asia. The malware, dubbed NAPLISTENER by Elastic Security Labs, is an HTTP listener programmed in C# and is designed to evade "network-based forms of detection." REF2924 is the moniker assigned to an activity cluster linked to attacks against an entityRavie Lakshmanan Security / Cyber Threat37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security

BreachForums Administrator Baphomet Shuts Down Infamous Hacking Forum

The Hacker News - 22 Březen, 2023 - 05:37
In a sudden turn of events, Baphomet, the current administrator of BreachForums, said in an update on March 21, 2023, that the hacking forum has been officially taken down but emphasized that "it's not the end." "You are allowed to hate me, and disagree with my decision but I promise what is to come will be better for us all," Baphomet noted in a message posted on the BreachForums Telegram Ravie Lakshmanan Crime / Hacking37.09024 -95.7128918.780006163821156 -130.869141 65.400473836178847 -60.556641
Kategorie: Hacking & Security
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