🔅نگاهی به عملکرد EDR: بخش چهارم
✅️مقایسه تلمتری EDR ها و نگاهی به سیسمون
کلیت EDR به سه قسمت از نظر من تقسیم میشود:
تلمتری ( همان شناسایی رفتار های سیستم )
ماژول همبسته سازی رفتار ها ( که هم رول داره هم هوش مصنوعی )
ماژول واکنش
تمام EDR ها خصوصیات مشابهی در سه دسته فوق ارائه نمیکنند یعنی در هر دسته یکسری خصوصیات ارائه میکنند . مثلا در ماژول همبسته سازی برخی از برخی دیگر قوی تر هستند .
اما اگر فقط بحث در خصوص تلمتری هست که اون رفتارها رو از سیستم بکشیم بیرون و دوتا ماژول دیگه رو کاری نداشته باشیم ؛ حتما باید تلمتری بره توی SIEM بررسی بشه و بله اونوقت میشه درمورد مقایسه EDR وچیزهایی چون سیسمون صحبت کرد .ولی در حالت معمول EDR فراتر از سیسمون هست و تنهایی دو کار بزرگتر انجام میده که سیسمون نمیتونه .
🔵اما حالا که بحث تلمتری شد بیایم یه مقایسه بین EDR های مختلف و حتی سیسمون در زمینه تلمتری در لینک زیر ببینیم :
https://lnkd.in/dKUh4hrK
〽️پی نوشت : این لینک حاصل یک پروژه است که EDR ها رو از بیرون سنجش کرده و ممکنه دقیق نباشه. و بازهم یادآوری کنم این لینک فقط تلمتری EDR ها رو بررسی کرده و نه کل خصوصیت EDR ها منجمله همبسته سازی و واکنش .
#تجربه #درس_آموخته
#اشتراک_دانش
#خوب_بنویسیم
#cybersecurity #threathunting #edr #antivirus
**سایر قسمتهای این نوشتار در لینکدین
Roozbeh noroozi
https://www.linkedin.com/posts/roozbehnoroozi_github-tsaleedr-telemetry-this-project-activity-7221418170190823434-c8a2?utm_source=share&utm_medium=member_android
✅️مقایسه تلمتری EDR ها و نگاهی به سیسمون
کلیت EDR به سه قسمت از نظر من تقسیم میشود:
تلمتری ( همان شناسایی رفتار های سیستم )
ماژول همبسته سازی رفتار ها ( که هم رول داره هم هوش مصنوعی )
ماژول واکنش
تمام EDR ها خصوصیات مشابهی در سه دسته فوق ارائه نمیکنند یعنی در هر دسته یکسری خصوصیات ارائه میکنند . مثلا در ماژول همبسته سازی برخی از برخی دیگر قوی تر هستند .
اما اگر فقط بحث در خصوص تلمتری هست که اون رفتارها رو از سیستم بکشیم بیرون و دوتا ماژول دیگه رو کاری نداشته باشیم ؛ حتما باید تلمتری بره توی SIEM بررسی بشه و بله اونوقت میشه درمورد مقایسه EDR وچیزهایی چون سیسمون صحبت کرد .ولی در حالت معمول EDR فراتر از سیسمون هست و تنهایی دو کار بزرگتر انجام میده که سیسمون نمیتونه .
🔵اما حالا که بحث تلمتری شد بیایم یه مقایسه بین EDR های مختلف و حتی سیسمون در زمینه تلمتری در لینک زیر ببینیم :
https://lnkd.in/dKUh4hrK
〽️پی نوشت : این لینک حاصل یک پروژه است که EDR ها رو از بیرون سنجش کرده و ممکنه دقیق نباشه. و بازهم یادآوری کنم این لینک فقط تلمتری EDR ها رو بررسی کرده و نه کل خصوصیت EDR ها منجمله همبسته سازی و واکنش .
#تجربه #درس_آموخته
#اشتراک_دانش
#خوب_بنویسیم
#cybersecurity #threathunting #edr #antivirus
**سایر قسمتهای این نوشتار در لینکدین
Roozbeh noroozi
https://www.linkedin.com/posts/roozbehnoroozi_github-tsaleedr-telemetry-this-project-activity-7221418170190823434-c8a2?utm_source=share&utm_medium=member_android
lnkd.in
LinkedIn
This link will take you to a page that’s not on LinkedIn
نت فلو یک عنصر مهم در امنیت اطلاعات است . نحوه ی تنظیم اون رو در ویدئوی زیر برای Cisco SD-WAN ببینید
#آکادمی_روزبه
https://m.youtube.com/watch?si=WeEoCAqX-uqkF-pI&v=a1Tw1xANgsU&feature=youtu.be
#آکادمی_روزبه
https://m.youtube.com/watch?si=WeEoCAqX-uqkF-pI&v=a1Tw1xANgsU&feature=youtu.be
YouTube
How to Configure SNMP and NetFlow on Cisco SD-WAN
In this video, I will guide you through the steps to configure SNMP and NetFlow on Cisco SD-WAN. Learn how to set up and manage these essential monitoring tools to ensure optimal network performance and visibility. Whether you're a network administrator or…
تحلیل سازمان معظم ISC2 ( صادر کننده مدرک CISSP) در مورد بحران CrowdStrike و راهکارهای جبرانی را بخوانید .
#آکادمی_روزبه
https://www.isc2.org/Insights/2024/07/After-the-CrowdStrike-Outage-What-Can-We-Learn
#آکادمی_روزبه
https://www.isc2.org/Insights/2024/07/After-the-CrowdStrike-Outage-What-Can-We-Learn
www.isc2.org
After the CrowdStrike Outage: What Can We Learn?
The CrowdStrike software update issue highlighted the importance of robust software testing and the software development lifecycle, domain elements of the CSSLP certification. Following on from our look at dealing with IT outages, we consider how this incident…
آکادمی آموزش روزبه 📚 pinned «اسپلانک نسخه 9.3 اومد. برای رهایی از برخی باگ ها خیلی خوبه که استفاده اش کنین . #آکادمی_روزبه»
دو مقاله ی خوش نوشت از فورستر در مورد بحران CrowdStrike
#آکادمی_روزبه
https://www.forrester.com/blogs/the-crowdstrike-moment-calls-for-a-redefinition-of-business-resilience/
#آکادمی_روزبه
https://www.forrester.com/blogs/the-crowdstrike-moment-calls-for-a-redefinition-of-business-resilience/
Forrester
The CrowdStrike Moment Calls For A Redefinition Of Business Resilience
CrowdStrike's global outage holds lessons for business and tech leaders. Our new report provides a thorough overview of recommended actions.
👍1
در مصاحبه تیم قرمز چه میپرسند؟
#آکادمی_روزبه
https://github.com/HadessCS/Red-team-Interview-Questions
#آکادمی_روزبه
https://github.com/HadessCS/Red-team-Interview-Questions
GitHub
GitHub - HadessCS/Red-team-Interview-Questions: Red team Interview Questions
Red team Interview Questions. Contribute to HadessCS/Red-team-Interview-Questions development by creating an account on GitHub.
گزارش خوب بخوانیم
دور زدن اسمارت اسکرین ویندوز توسط گروه های APT
#آکادمی_روزبه
**مطالعه این گزارشات یکی از روتین های لایه ۲ و ۳ مرکز عملیات است
https://www.fortinet.com/blog/threat-research/exploiting-cve-2024-21412-stealer-campaign-unleashed
دور زدن اسمارت اسکرین ویندوز توسط گروه های APT
#آکادمی_روزبه
**مطالعه این گزارشات یکی از روتین های لایه ۲ و ۳ مرکز عملیات است
https://www.fortinet.com/blog/threat-research/exploiting-cve-2024-21412-stealer-campaign-unleashed
Fortinet Blog
Exploiting CVE-2024-21412: A Stealer Campaign Unleashed
FortiGuard Labs has observed a stealer campaign spreading multiple files that exploit CVE-2024-21412 to download malicious executable files. Read more.…
Forwarded from KASYS
BCP & DRP Template .pdf
306.4 KB
KASYS
BCP & DRP Template .pdf
پیشنهاد برای آموزش دوره های ISMS و BCP
از جمله روشهای آنتی فارنزیک
پراکسی کردن سیستم کال
**البته هنوز ردپاهایی باقی میماند
#آکادمی_روزبه
https://medium.com/@nisaprmst/syscall-proxy-a-way-to-minimize-footprint-e7305efbfc5b
پراکسی کردن سیستم کال
**البته هنوز ردپاهایی باقی میماند
#آکادمی_روزبه
https://medium.com/@nisaprmst/syscall-proxy-a-way-to-minimize-footprint-e7305efbfc5b
Medium
Syscall Proxy: A Way To Minimize “Footprint”
This article will discuss one of the most advanced techniques of anti-forensics. Anti-forensics is tools or techniques that frustrate…
آنتی فارنزیک در حافظه
از جناب علیرضا تقی خانی
#آکادمی_روزبه
https://medium.com/@alirezataghikhani1998/memory-analysis-against-anti-forensics-methods-22dd2c37f2a
از جناب علیرضا تقی خانی
#آکادمی_روزبه
https://medium.com/@alirezataghikhani1998/memory-analysis-against-anti-forensics-methods-22dd2c37f2a
Medium
Memory Analysis Against Anti-Forensics Methods
“Exploring RAM acquisition techniques and focus on how malware uses anti-forensics techniques to evade memory acquisition”
سرتیفیکیت بیش از ۸۳ هزار دامین چرا باطل میشود؟
#آکادمی_روزبه
https://thehackernews.com/2024/07/digicert-to-revoke-83000-ssl.html
#آکادمی_روزبه
https://thehackernews.com/2024/07/digicert-to-revoke-83000-ssl.html
از chatGPT بهینه استفاده کنیم
مثال : سوال
As a forensic expert , Explain system call
جواب :
A system call is an essential mechanism that allows user-level processes to request services from the operating system's kernel. These services can include tasks like accessing hardware, managing files, allocating memory, or creating and managing processes. Here’s a detailed breakdown of system calls from a forensic expert's perspective:
### Basic Concept
1. Definition: A system call is a controlled entry point that allows a program to request a service from the operating system's kernel.
2. Purpose: It provides an interface between user-space applications and the kernel, enabling them to perform operations that require higher privileges.
### Categories of System Calls
System calls can be broadly categorized based on their functionality:
1. Process Control: Creating and managing processes (e.g.,
2. File Management: Handling files and directories (e.g.,
3. Device Management: Interacting with hardware devices (e.g.,
4. Information Maintenance: Gathering and setting system information (e.g.,
5. Communication: Facilitating inter-process communication (e.g.,
### System Call Lifecycle
1. Invocation: A system call is typically invoked by a user-level process through a library function (e.g., the C standard library).
2. Transition to Kernel Mode: The CPU switches from user mode to kernel mode to execute the system call. This transition is often triggered by a software interrupt or trap.
3. Kernel Execution: The kernel executes the requested service using its internal resources and privileged instructions.
4. Return to User Mode: The results of the system call are returned to the user process, and the CPU switches back to user mode.
### Forensic Relevance
From a forensic perspective, understanding system calls is crucial for several reasons:
1. Activity Monitoring: System calls provide insights into what a process is doing. By monitoring system calls, forensic experts can track file access, process creation, and other critical activities.
2. Malware Analysis: Malicious software often relies on system calls to perform its actions. By analyzing the sequence of system calls, experts can understand the behavior of malware.
3. Incident Response: During an incident, system call logs can help reconstruct the events leading up to the security breach.
4. Digital Evidence: System call traces can serve as digital evidence in investigations, revealing unauthorized access or data manipulation.
### Tools and Techniques
1. Strace: A widely used tool in Unix-like systems to trace system calls made by a process.
2. Auditd: The Linux Auditing System, which can log system calls for security monitoring and compliance purposes.
3. Sysmon: A Windows system service that logs system calls and other system events for detailed monitoring.
### Example
Here’s a simple example of how a system call works:
In this C program:
- The
- The
By understanding and analyzing such system calls, forensic experts can gain insights into the actions performed by processes on a system.
#آکادمی_روزبه
مثال : سوال
As a forensic expert , Explain system call
جواب :
A system call is an essential mechanism that allows user-level processes to request services from the operating system's kernel. These services can include tasks like accessing hardware, managing files, allocating memory, or creating and managing processes. Here’s a detailed breakdown of system calls from a forensic expert's perspective:
### Basic Concept
1. Definition: A system call is a controlled entry point that allows a program to request a service from the operating system's kernel.
2. Purpose: It provides an interface between user-space applications and the kernel, enabling them to perform operations that require higher privileges.
### Categories of System Calls
System calls can be broadly categorized based on their functionality:
1. Process Control: Creating and managing processes (e.g.,
fork(), exec(), wait(), exit()).2. File Management: Handling files and directories (e.g.,
open(), read(), write(), close(), unlink()).3. Device Management: Interacting with hardware devices (e.g.,
ioctl(), read(), write()).4. Information Maintenance: Gathering and setting system information (e.g.,
getpid(), alarm(), sleep()).5. Communication: Facilitating inter-process communication (e.g.,
pipe(), shmget(), msgsnd(), recv()).### System Call Lifecycle
1. Invocation: A system call is typically invoked by a user-level process through a library function (e.g., the C standard library).
2. Transition to Kernel Mode: The CPU switches from user mode to kernel mode to execute the system call. This transition is often triggered by a software interrupt or trap.
3. Kernel Execution: The kernel executes the requested service using its internal resources and privileged instructions.
4. Return to User Mode: The results of the system call are returned to the user process, and the CPU switches back to user mode.
### Forensic Relevance
From a forensic perspective, understanding system calls is crucial for several reasons:
1. Activity Monitoring: System calls provide insights into what a process is doing. By monitoring system calls, forensic experts can track file access, process creation, and other critical activities.
2. Malware Analysis: Malicious software often relies on system calls to perform its actions. By analyzing the sequence of system calls, experts can understand the behavior of malware.
3. Incident Response: During an incident, system call logs can help reconstruct the events leading up to the security breach.
4. Digital Evidence: System call traces can serve as digital evidence in investigations, revealing unauthorized access or data manipulation.
### Tools and Techniques
1. Strace: A widely used tool in Unix-like systems to trace system calls made by a process.
2. Auditd: The Linux Auditing System, which can log system calls for security monitoring and compliance purposes.
3. Sysmon: A Windows system service that logs system calls and other system events for detailed monitoring.
### Example
Here’s a simple example of how a system call works:
#include <unistd.h>
#include <stdio.h>
int main() {
char buffer[128];
int bytesRead;
// System call: read from standard input (file descriptor 0)
bytesRead = read(0, buffer, 128);
// System call: write to standard output (file descriptor 1)
write(1, buffer, bytesRead);
return 0;
}
In this C program:
- The
read() system call reads data from the standard input.- The
write() system call writes data to the standard output.By understanding and analyzing such system calls, forensic experts can gain insights into the actions performed by processes on a system.
#آکادمی_روزبه
گزارش خوب و فنی بخوانیم
تحلیل رفتاری گروه UNC4393
#آکادمی_روزبه
https://cloud.google.com/blog/topics/threat-intelligence/unc4393-goes-gently-into-silentnight?linkId=10528541
تحلیل رفتاری گروه UNC4393
#آکادمی_روزبه
https://cloud.google.com/blog/topics/threat-intelligence/unc4393-goes-gently-into-silentnight?linkId=10528541
Google Cloud Blog
UNC4393 Goes Gently into the SILENTNIGHT | Google Cloud Blog
We detail the evolution of UNC4393's operational tactics and malware usage throughout its active lifespan.