1. Patching is key.
2. Monitor for key Indicators of Compromise
a. https://bitbucket.org/jadacyrus/ransomwareremovalkit/overview
b. Look for ipinfo.io/ip in your web logs
3. There's some great discussions within the attached thread
4. Block "Dynamic Content" on your proxy or newly registered domains
From: [email protected] [mailto:[email protected]] On
Behalf Of Susan Bradley
Sent: Friday, July 03, 2015 1:57 PM
To: [email protected]
Subject: Re: [NTSysADM] OT: VirusScanning software
It changes so fast that as soon as they do the bad guys code up something new.
there's no silver bullet here.
Silverlight/flash/java. Use it,patch it or lose it.
Web filtering at the firewall. If your firewall doesn't provide web
filtering/UTM options it's time to upgrade. Home users look at OpenDNS (yes
even now that Cisco is buying them)
Filter attachments/zips.
Least priv/non admin.
Block the app location (yes this impacts firefox and office installs) Google
foolishit for non domain or cryptolocker group policy toolkit
Education to your users that that email you got isn't a legit email.
On 7/3/2015 10:09 AM, David McSpadden wrote:
Quick, anyone know of a VirusScanning software that is catching CryptoWall 3.0
yet?
David McSpadden
Systems Administrator
Indiana Members Credit Union
P: 317.554.8190 | F: 317.554.8106
[Description: imcu email icon]<http://imcu.com/> [Description: facebook email
icon] <https://www.facebook.com/IndianaMembersCU> [Description: twitter email
icon] <https://twitter.com/IndMembersCU>
[Description: email logo]
[mcp2]
This e-mail and any files transmitted with it are property of Indiana Members
Credit Union, are confidential, and are intended solely for the use of the
individual or entity to whom this e-mail is addressed. If you are not one of
the named recipient(s) or otherwise have reason to believe that you have
received this message in error, please notify the sender and delete this
message immediately from your computer. Any other use, retention,
dissemination, forwarding, printing, or copying of this email is strictly
prohibited.
Please consider the environment before printing this email.
IMPORTANT NOTICE: Without the use of secure encryption, the Internet is not a
secure medium and privacy cannot be ensured. Internet e-mail is vulnerable to
interception, misuse and forging. Equitable cannot ensure the privacy and
authenticity of any information sent by way of the public Internet. Equitable
will not be responsible for any damages you may incur if you communicate
confidential and personal information to us over the Internet or if we
communicate such information to you at your request. This e-mail and any
attachments are confidential, may be covered by legal professional privilege or
exempt from disclosure under applicable law, and are intended for the addressee
only. If you are not the intended recipient, you are not authorized to and must
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attachments without written permission of The Equitable Life Insurance Company
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--- Begin Message ---
Ensure you have the latest patches installed for Java and Flash. Exploit kits
like Angler, Nuclear and Magnitude are starting to distribute Ransomware more
frequently via drive-by download attacks and malicious advertisements on common
websites.
We've had several ransomware incidents in the last few months all due to
unpatched systems. Host based detection is limited at best, but one thing I
have noticed in all incidents seen is that the malware typically uses
hxxp://ipinfo.io/ip to determine its public facing IP address.
We have created correlation rules that detect users going to this domain via
our McAfee ESM SIEM, we then have an alarm that fires when that correlation
rule is seen and we can automatically apply an ePO tag to enforce a policy that
severely 'disables' the system (no R/W to network shares, restricted HTTP/HTTPS
going out). Our alarm also e-mails out some key characteristics about the
infected machine for easy identification by our IT Service Desk team.
Ransomware isn't going away and it's going to get worse. We've been able to
detect these IoC's and have the issue remediated in under 7 minutes.
Cheers,
Rob Strong
Information Security Specialist
Equitable Life of Canada
From: [email protected] [mailto:[email protected]] On
Behalf Of David McSpadden
Sent: Thursday, May 28, 2015 7:17 PM
To: <[email protected]>
Subject: Re: [NTSysADM] Cryptlocker
That's mine today.
What variant was yours
Sent from my iPhone
On May 28, 2015, at 7:14 PM, Heaton, Joseph@Wildlife
<[email protected]<mailto:[email protected]>> wrote:
We had that the other day. The files are getting encrypted, but the
extensions are not getting changed.
From: [email protected]<mailto:[email protected]>
[mailto:[email protected]] On Behalf Of Jonathan Link
Sent: Thursday, May 28, 2015 8:37 AM
To: [email protected]<mailto:[email protected]>
Subject: Re: [NTSysADM] Cryptlocker
The text files created should indicate the affected user with the Owner
attribute, no?
On Thu, May 28, 2015 at 11:30 AM, David McSpadden
<[email protected]<mailto:[email protected]>> wrote:
I am pretty sure I have pc with this on it in my network.
I have ran scans on workstations.
I still do not see it but I have the tell tale signs.
The HELP_DECRYPT files in network folders.
The word and excel files not being able to be opened etc.
How do I remove something that Trend is not seeing?
Nor Windows Endpoint protection?
David McSpadden
Systems Administrator
Indiana Members Credit Union
P: 317.554.8190<tel:317.554.8190> | F: 317.554.8106<tel:317.554.8106>
Description: imcu email icon<http://imcu.com/>
<image002.jpg><https://www.facebook.com/IndianaMembersCU> Description: twitter
email icon<https://twitter.com/IndMembersCU>
Description: email logo
mcp2
This e-mail and any files transmitted with it are property of Indiana
Members Credit Union, are confidential, and are intended solely for the use of
the individual or entity to whom this e-mail is addressed. If you are not one
of the named recipient(s) or otherwise have reason to believe that you have
received this message in error, please notify the sender and delete this
message immediately from your computer. Any other use, retention,
dissemination, forwarding, printing, or copying of this email is strictly
prohibited.
Please consider the environment before printing this email.
IMPORTANT NOTICE: Without the use of secure encryption, the Internet is not
a secure medium and privacy cannot be ensured. Internet e-mail is vulnerable to
interception, misuse and forging. Equitable cannot ensure the privacy and
authenticity of any information sent by way of the public Internet. Equitable
will not be responsible for any damages you may incur if you communicate
confidential and personal information to us over the Internet or if we
communicate such information to you at your request. This e-mail and any
attachments are confidential, may be covered by legal professional privilege or
exempt from disclosure under applicable law, and are intended for the addressee
only. If you are not the intended recipient, you are not authorized to and must
not disclose, copy, distribute or retain any or part of this e-mail and any
attachments without written permission of The Equitable Life Insurance Company
of Canada.
--- End Message ---
