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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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It's every security pro's nightmare: Your company has been hit with ransomware, and every machine and server has been encrypted.

Shocked? Likely, but security experts say the warning signs were there all along. Misdirected DNS requests, bad VPN reboots, and Active Directory login failures should have been setting off alarms that a ransomware attack was in progress.

It doesn't have to be this way. According to Tarik Saleh, a senior security engineer and malware researcher at DomainTools, mitigation efforts begin with evaluating how vulnerable your company is to exploits. For example, are you leaving databases exposed on the public Internet?

"You first have to ask yourself how your business stands in the eyes of the attackers," Saleh says.

And once attackers are in your network, you have anywhere from 48 hours to 12 days before they pull the trigger, says Mike Hamilton, CISO of CI Security.

What key warning signs should you be on the lookout for as you develop a ransomware mitigation plan? Keeping reading. 

 

Steve Zurier has more than 30 years of journalism and publishing experience and has covered networking, security, and IT as a writer and editor since 1992. Steve is based in Columbia, Md. View Full Bio
 

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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.
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CVE-2020-29378
PUBLISHED: 2020-11-29
An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7 and V1.9.7, and V1600G2 V1.1.4 OLT devices. It is possible to elevate the privilege of a CLI user (to full administrative access) by using the password [email protected]#y$z%x6x7q8c9z) for the e...
CVE-2020-29379
PUBLISHED: 2020-11-29
An issue was discovered on V-SOL V1600D4L V1.01.49 and V1600D-MINI V1.01.48 OLT devices. During the process of updating the firmware, the update script starts a telnetd -l /bin/sh process that does not require authentication for TELNET access.
CVE-2020-29380
PUBLISHED: 2020-11-29
An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7 and V1.9.7, and V1600G2 V1.1.4 OLT devices. TELNET is offered by default but SSH is not always available. An attacker can intercept passwords sent in cleartext and conduct a man-in-...
CVE-2020-29381
PUBLISHED: 2020-11-29
An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600D4L V1.01.49, V1600D-MINI V1.01.48, V1600G1 V2.0.7 and V1.9.7, and V1600G2 V1.1.4 OLT devices. Command injection can occur in "upload tftp syslog" and "upload tftp configuration" in the CLI via a crafted filename...
CVE-2020-29382
PUBLISHED: 2020-11-29
An issue was discovered on V-SOL V1600D V2.03.69 and V2.03.57, V1600G1 V2.0.7 and V1.9.7, and V1600G2 V1.1.4 OLT devices. A hardcoded RSA private key (specific to V1600D, V1600G1, and V1600G2) is contained in the firmware images.