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Attacks/Breaches

8/28/2020
11:00 AM
Steve Zurier
Steve Zurier
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Ransomware Red Flags: 7 Signs You're About to Get Hit

Caught off guard by a ransomware attack? Security experts say the warning signs were there all along.
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Brute-Force Attacks Will Hit the Network
According to Awake Labs vice president Jason Bevis, who recently published a blog about ransomware warning signs, you should also look for brute-force attacks on RDP systems. Once in the network, attackers typically look for additional passwords. You also need to watch for unusual file-copying activity, especially of .bat, .zip, .txt, and other common files. It's not common for one account to copy files to and from multiple user accounts or devices. There are also situations where the attackers could have compromised administrative accounts and start copying files. The attackers also use these accounts to persist and quickly encrypt the file systems. 
All WinSysLog files should be sent to a security information and event management (SIEM) system for analysis because it can detect whether files are being encrypted, Domain Tools' Saleh adds. And in a blog posted earlier this week, Red Canary says to watch for the use of the Windows Backup Administration Tool wbadmin.exe to delete system backups. Other signs of ransomware include manipulation of vssadmin.exe to hinder recovery from backups and processes making hundreds of file modification operations on files with the string readme in them. 
Image Source: Adobe Stock: mehaniq41

Brute-Force Attacks Will Hit the Network

According to Awake Labs vice president Jason Bevis, who recently published a blog about ransomware warning signs, you should also look for brute-force attacks on RDP systems. Once in the network, attackers typically look for additional passwords. You also need to watch for unusual file-copying activity, especially of .bat, .zip, .txt, and other common files. It's not common for one account to copy files to and from multiple user accounts or devices. There are also situations where the attackers could have compromised administrative accounts and start copying files. The attackers also use these accounts to persist and quickly encrypt the file systems.

All WinSysLog files should be sent to a security information and event management (SIEM) system for analysis because it can detect whether files are being encrypted, Domain Tools' Saleh adds. And in a blog posted earlier this week, Red Canary says to watch for the use of the Windows Backup Administration Tool wbadmin.exe to delete system backups. Other signs of ransomware include manipulation of vssadmin.exe to hinder recovery from backups and processes making hundreds of file modification operations on files with the string readme in them.

Image Source: Adobe Stock: mehaniq41

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David-Balaban
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David-Balaban,
User Rank: Author
9/11/2020 | 3:29:11 AM
Backups no longer enough
Earlier, during a ransomware attack, organizations could remove the virus and restore files from the backup. The ransomware authors' tactics have now changed. They first steal all files that they can, and then encrypt everything. Later, if you don't want to pay the ransom, they threaten to publish your confidential files. In addition to backups, you need now to also take care of encrypting important info, both data at rest and data in transit.
Commentary
Ransomware Is Not the Problem
Adam Shostack, Consultant, Entrepreneur, Technologist, Game Designer,  6/9/2021
Edge-DRsplash-11-edge-ask-the-experts
How Can I Test the Security of My Home-Office Employees' Routers?
John Bock, Senior Research Scientist,  6/7/2021
News
New Ransomware Group Claiming Connection to REvil Gang Surfaces
Jai Vijayan, Contributing Writer,  6/10/2021
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