lunes, 5 de junio de 2023

How To Recover Files That Are Deleted From Recycle Bin

How To Recover Files That Are Deleted From Recycle Bin

How To Recover Files That Are Deleted From Recycle Bin

How To Recover Files That Are Deleted From Recycle Bin

Well, Windows users have a bad habit of removing files from recycle bin. Deleting useless files from Recycle Bin helps a user to save some storage space which can improve the speed of a computer. However, Windows users do that more frequently and later regret. Actually, Recycle Bin is a place from where we can get back our deleted files and folders.
Sometimes, we accidentally delete our important files and folders and due to some reason we lose them from Recycle bin too! At that time, we search for recovery methods. Well, there are many methods available over the web which can help you to recover deleted files from computer, but, when it comes to reliability, nothing can beat EaseUS.

What Is EaseUS Data Recovery Wizard?

EaseUS is one of the leading software providers which is known for its data recovery programme. EaseUS offers some free data recovery software that can help you to recover deleted, formatted or lost data from PC, laptop or removable device easily and quickly.
One of the best thing about EaseUS is that it provides tools for recycle bin recovery which can help you to get back files that you have deleted from the Recycle bin itself. EaseUS Data Recovery Wizard free can easily recover lost files, pictures, documents, videos and more from deleting, formatting, partition loss, OS crash, virus attack and other data loss cases.

How To Recover Deleted Files?

If you are struggling to get back your lost data files, then here is an easy data recovery method which will help you to get back deleted files on your computer. Below, we are going to share a mini guide on how to use EaseUS Recycle Bin Recovery to get back your deleted data.
Step 1. First of all, you need to download and install EaseUS Data Recovery Wizard on your Windows computer and then launch it normally. You need to select the location where you want to scan and then click on 'Scan'
Step 2. Now, wait for few minutes until the tool finishes scanning your drive. The tool search for files that got deleted or cleaned from the Recycle Bin.
Step 3. Now it will show you files that you can recover. Here you need to click on the file which you want to recover and click on 'Recover'
That's it, you are done! This is how you can use EaseUS data recovery to get back your deleted files on your computer.

Benefits of EaseUS Data Recovery

Well, the data recovery tool provided by EaseUS comes with many benefits. It can not only recover accidentally deleted files, but it can also recover data in case of Virus Attacks, Hard Disk Damage, OS Crash etc.
You can also use this awesome data recovery wizard to recover deleted files from External Disk, USB Drive, Camcorder, Mobile Devices, Zip Drive, iPod, Music Player and more.
Overall, this is one of the best data recovery tools you can have on your Windows computer. EaseUS Data Recovery also has a free version with restricted features. Overall, this is a stress-free solution to get back your deleted files
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HiddenWasp Linux Malware Backdoor Samples





Intezer HiddenWasp Malware Stings Targeted Linux Systems 



Links updated: Jan 19, 2023
File informatio


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elf

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shell

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 elf shared-lib

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64bits elf shared-lib

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shell

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tar-bundle gzip contains-elf

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 tar-bundle gzip

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64bits elf 
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Thousand Ways To Backdoor A Windows Domain (Forest)

When the Kerberos elevation of privilege (CVE-2014-6324 / MS14-068) vulnerability has been made public, the remediation paragraph of the following blog post made some waves:
http://blogs.technet.com/b/srd/archive/2014/11/18/additional-information-about-cve-2014-6324.aspx

"The only way a domain compromise can be remediated with a high level of certainty is a complete rebuild of the domain."

Personally, I agree with this, but .... But whether this is the real solution, I'm not sure. And the same applies to compromised computers. When it has been identified that malware was able to run on the computer (e.g. scheduled scan found the malware), there is no easy way to determine with 100% certainty that there is no rootkit on the computer. Thus rebuilding the computer might be a good thing to consider. For paranoids, use new hardware ;)

But rebuilding a single workstation and rebuilding a whole domain is not on the same complexity level. Rebuilding a domain can take weeks or months (or years, which will never happen, as the business will close before that).

There are countless documented methods to backdoor a computer, but I have never seen a post where someone collects all the methods to backdoor a domain. In the following, I will refer to domain admin, but in reality, I mean Domain Admins, Enterprise Admins, and Schema Admins.


Ways to backdoor a domain

So here you go, an incomplete list to backdoor a domain:

  • Create a new domain admin user. Easy to do, easy to detect, easy to remediate
  • Dump password hashes. The attacker can either crack those or just pass-the-hash. Since KB2871997, pass-the-hash might be trickier (https://technet.microsoft.com/library/security/2871997), but not impossible. Easy to do, hard to detect, hard to remediate - just think about service user passwords. And during remediation, consider all passwords compromised, even strong ones.
  • Logon scripts - modify the logon scripts and add something malicious in it. Almost anything detailed in this post can be added :D
  • Use an already available account, and add domain admin privileges to that. Reset its password. Mess with current group memberships - e.g. http://www.exploit-db.com/papers/17167/
  • Backdoor any workstation where domain admins login. While remediating workstations, don't forget to clean the roaming profile. The type of backdoor can use different forms: malware, local admin, password (hidden admin with 500 RID), sticky keys, etc.
  • Backdoor any domain controller server. For advanced attacks, see Skeleton keys 
  • Backdoor files on network shares which are commonly used by domain admins by adding malware to commonly used executables - Backdoor factory
  • Change ownership/permissions on AD partitions - if you have particular details on how to do this specifically, please comment
  • Create a new domain user. Hide admin privileges with SID history. Easy to do, hard to detect, easy to remediate - check Mimikatz experimental for addsid
  • Golden tickets - easy to do, hard to detect, medium remediation
  • Silver tickets - easy to do, hard to detect, medium/hard remediation
  • Backdoor workstations/servers via group policy
    • HKEY_LOCAL_MACHINE\ Software\ Microsoft\ Windows\ CurrentVersion\ RunOnce,
    • scheduled tasks (run task 2 years later),
    • sticky-keys with debug
  • Backdoor patch management tool, see slides here
[Update 2017.01.10]


Other tricks

The following list does not fit in the previous "instant admin" tips, but still, it can make the attackers life easier if their primary foothold has been disabled:

  • Backdoor recent backups - and when the backdoor is needed, destroy the files, so the files will be restored from the backdoored backup
  • Backdoor the Exchange server - get a copy of emails
  • Backdoor workstation/server golden image
  • Change permission of logon scripts to allow modification later
  • Place malicious symlinks to file shares, collect hashes via SMB auth tries on specified IP address, grab password hashes later
  • Backdoor remote admin management e.g. HP iLO - e.g. create new user or steal current password
  • Backdoor files e.g. on shares to use in SMB relay
  • Backdoor source code of in-house-developed software
  • Use any type of sniffed or reused passwords in new attacks, e.g. network admin, firewall admin, VPN admin, AV admin, etc.
  • Change the content of the proxy pac file (change browser configuration if necessary), including special exception(s) for a chosen domain(s)  to use proxy on malicious IP. Redirect the traffic, enforce authentication, grab password hashes, ???, profit.
  • Create high privileged users in applications running with high privileges, e.g. MSSQL, Tomcat, and own the machine, impersonate users, grab their credentials, etc. The typical pentest path made easy.
  • Remove patches from servers, change patch policy not to install those patches.
  • Steal Windows root/intermediate CA keys
  • Weaken AD security by changing group policy (e.g. re-enabling LM-hashes)
Update [2015-09-27]: I found this great presentation from Jakob Heidelberg. It mentions (at least) the following techniques, it is worth to check these:
  • Microsoft Local Administrator Password Solution
  • Enroll virtual smart card certificates for domain admins

Forensics

If you have been chosen to remediate a network where attackers gained domain admin privileges, well, you have a lot of things to look for :)

I can recommend two tools which can help you during your investigation:

Lessons learned

But guess what, not all of these problems are solved by rebuilding the AD. One has to rebuild all the computers from scratch as well. Which seems quite impossible. When someone is creating a new AD, it is impossible not to migrate some configuration/data/files from the old domain. And whenever this happens, there is a risk that the new AD will be backdoored as well.

Ok, we are doomed, but what can we do? I recommend proper log analysis, analyze trends, and detect strange patterns in your network. Better spend money on these, than on the domain rebuild. And when you find something, do a proper incident response. And good luck!

Ps: Thanks to Andrew, EQ, and Tileo for adding new ideas to this post.

Check out the host backdooring post as well! :)
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domingo, 4 de junio de 2023

OWASP Announcement

🕬  OWASP Announcement:


The OWASP Foundation has been chosen to be 1 of 50 Open Source Organizations to participate in the inaugural year of the Google Season of Docs program.

The goal of Season of Docs is to provide a framework for technical writers and open source projects to work together towards the common goal of improving an open source project's documentation. For technical writers who are new to open source, the program provides an opportunity to gain experience in contributing to open source projects. For technical writers who're already working in open source, the program provides a potentially new way of working together. Season of Docs also gives open source projects an opportunity to engage more of the technical writing community.

We would like to thank the OWASP members that donate their time and knowledge as administrators and mentors. It would not be possible if not for these individuals:
Spyros, Fabio, and Konstantinos 


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