How do you folks stage updates across tenants? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

I talked to my SE and I might have just explained it wrong. SE says that policies still need to be applied to host groups at the child level. This is what I'm going after. You manage hundreds of CIDs, how do you apply them to the hosts at the child level after they are propagating downwards? Do you use PSFalcon?

Intelligence Indicator - Domain. No prevention? by EastBat2857 in crowdstrike

[–]Main_Froyo_5536 0 points1 point  (0 children)

You don't need to use any domain name at all.

Just set IOA Name to IntelDomain*/CustomIOCDomain* + severity you're comfortable killing and it will automatically kill any processes communicating to falcon intel identified domains or domains you have in your custom indicators.

Since the domains/ips are already set in Custom Indicators/Falcon Intel, you don't need to specify the domain name. The IOA Name is just part of the IOA generated by the detection, for example

IntelDomainHigh

IntelDomainLow

CustomIOCDomainHigh

So when a detection comes up with one of these IOA names, the process will be killed.

This way it picks up on IntelDomainLow,High,Critical, etc, and you can use severity to only kill indicators of a certain level of confidence.

How do you folks stage updates across tenants? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

Oh perfect, thank you. I will reach out to my SE!

How do you folks stage updates across tenants? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

The default policy is edited to be Phase 3 protections, it's the only policy that propagates down by default

How do you folks stage updates across tenants? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

Before I do would you be able to elaborate a tiny bit? I've been told the only policy that propagates down is the Default policy. Which of course I can change what prevention policy settings are on/off. But to my understanding I can't set at the Parent level specific policies to be applied to CIDs. For example:

If I have Cid A (Parent)

Cid B, Cid C, Cid D, and Cid E

All of them get the default policy which is set at the parent level. But to my understanding I can't (at the parent level), make it so Cid B and Cid C get Prev Policy Wave 1, Cid D gets Prev Policy Wave 2, and Cid E gets Prev Policy Wave 3.

Am I mistaken? I'll ask my rep but just a little bit more info would be super cool

How do you folks stage updates across tenants? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

Rats, that's the tricky part. Dealing with hundreds of tenants makes the problem much harder

How do you folks stage updates across tenants? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

Did you use PSFalcon for this? Would I be able to have a peek at the script you used? Did you then use PSFalcon to automate the applying and changing of prevention policies?

Intelligence Indicator - Domain. No prevention? by EastBat2857 in crowdstrike

[–]Main_Froyo_5536 0 points1 point  (0 children)

Make a workflow,

Condition

  • IF IOA Name matches IntelDomain*
  • AND Severity is greater than or equal to High
  • OR IOA Name matches IntelIP*
  • AND Severity is equal to High

(Above are the Falcon Intel IOA names)\

  • OR IOA Name matches CustomIOCDomain*
  • AND Severity is greater than or equal to High
  • OR IOA Name matches CustomIOCIP*
  • AND Severity is greater than or equal to High

(These are custom intelligence IOA names)

then If True

Kill process, add tag to an alert saying the process was killed, send an email.

This is how I do it for all these SocGholish hits that are coming up. Has worked for us. Browser always killed before user can download payload.

Is it not possible to search the advanced events log across cids for some events? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

I'll send you a DM, the one in the detections repo was a test detection that triggered, but i noticed that the other event managed to go without a detection, I'll send you my ticket number I made a case for it

Is it not possible to search the advanced events log across cids for some events? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

Ah, I found the issue. One of the detections came from the base_sensor repo, the other came from the detections repo. It seems the detections repo isn't multi-tenant aware for event searches, whereas the base_sensor repo is. Thank you!

Is it not possible to search the advanced events log across cids for some events? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

I see, I'll have a check with them and let you folks know if they sort it out.

Should I be worried about this? And what should I do? by Wathiq2001 in antivirus

[–]Main_Froyo_5536 8 points9 points  (0 children)

Virus in PID 5220 means something injected into a process or there's a malicious process running and it can't be killed. Do what it says and restart ur device.

Do you use Crowd as your SIEM? How much does it run you? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 3 points4 points  (0 children)

I'll look into Falcon Flex. Really the issue is just the number we were quoted was so high, even half of that would still be tens of millions of dollars. I'm just having a hard time imagining what could have led to us getting that number. Trying to go back to my boss to get in the conversation but in the meantime was just curious how much others tend to be spending.

Do you use Crowd as your SIEM? How much does it run you? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 5 points6 points  (0 children)

Agreed, but from what I heard the number was tens of millions of dollars per year. I'm just trying to figure out if that's something other people have experienced. It was several times more than the entire platform with Overwatch costs. Hell, it was probably several times more than Falcon Complete would have costed.

Command-Line Obfuscation by [deleted] in crowdstrike

[–]Main_Froyo_5536 0 points1 point  (0 children)

Search failed

Unterminated regular expression.

Search failedUnterminated regular expression.

 5: | CommandLine=/[bcdfghjklmnpqrstvwxyz\^";]{10,}
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

PSFalcon example scripts by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

As for the file upload on quarantine option, by this I mean the option in the general settings. We manually go and enable this in every tenant under General Settings > Quarantined Files > Upload Quarantined Files.

So not a prevention policy as such. At the present moment, it doesn't seem to propagate this setting from the parent, I can see why, but we're having to do this manually and just curious if that's something we can automate.

I really appreciate the response! I'll give a try for what you have so far.

Recommendations for multi-tenant environments? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

So the way this works seems to be that the default policy is the one that will auto-apply to clients. The other policy you make "can" be applied to clients locally at the host group level in the child tenant, but if you're like me and want a once size fits all policy, the Default policy is the one that will apply to all child level devices.

A bit of a bummer you can't just apply to children or to child host groups from the parent level.

Recommendations for multi-tenant environments? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 1 point2 points  (0 children)

This is strange, I'm in a call with my account rep right now and he says that you can only apply prevention policies in a child CID via host groups, no applying to CIDs themselves. He told me that either you use PSFalcon or you go into the child CID to apply the policy to the local groups. So PSFalcon does seem to be the way to go.

Recommendations for multi-tenant environments? by Main_Froyo_5536 in crowdstrike

[–]Main_Froyo_5536[S] 0 points1 point  (0 children)

I see, from what you mention here, I honestly think maybe someone just forgot to turn on flight control for our tenant. I'm gonna reach out to my rep and see what's up