[Emerging-Sigs] KBot C2 Sig

elhijo at 0lim.net elhijo at 0lim.net
Wed Feb 12 05:53:04 HST 2020

Hi Brad,

the last one was sent with my newly registered account elhijo at illum-mg.fr

There only was a text and an attachment with a json zeek logs file, I've tried to tar the json file but had same issue.

It have been sent from around 16:30


February 12, 2020 4:44 PM, "Brad Woodberg" <bwoodberg at proofpoint.com (mailto:bwoodberg at proofpoint.com?to=%22Brad%20Woodberg%22%20<bwoodberg at proofpoint.com>)> wrote:
	Hi David, 

	I tested the portal and could not reproduce the issue, nor have we received any other reports. If you can provide the details of what you entered that would be helpful. I’ll let the team speak to the signature itself. 
	Brad Woodberg l Group Product Manager - Emerging Threats, TAP Campaigns 

	Proofpoint, Inc.  

	E: bwoodberg at proofpoint.com (mailto:bwoodberg at proofpoint.com) 


	threat protection l compliance l archiving & governance l secure communication 

	From: Emerging-sigs <emerging-sigs-bounces at lists.emergingthreats.net (mailto:emerging-sigs-bounces at lists.emergingthreats.net)> on behalf of "elhijo at 0lim.net (mailto:elhijo at 0lim.net)" <elhijo at 0lim.net (mailto:elhijo at 0lim.net)>
Date: Wednesday, February 12, 2020 at 10:39 AM
To: "emerging-sigs at emergingthreats.net (mailto:emerging-sigs at emergingthreats.net)" <emerging-sigs at emergingthreats.net (mailto:emerging-sigs at emergingthreats.net)>
Subject: Re: [Emerging-Sigs] KBot C2 Sig 

was trying to send you same issue through ET feedback webpage but I get bad gateway error every time I submit my request.


All alerts linked to i[1234]4.c.eset.com


February 12, 2020 4:30 PM, "Stuart Gonzalez" <stu at perchsecurity.com (mailto:stu at perchsecurity.com?to=%22Stuart%20Gonzalez%22%20%3cstu at perchsecurity.com%3e)> wrote: 
	Hi Team, 

	Looking through this sig and wondering if the content match for “.eset.com” should have been negated. I reviewed the references, as well as, other malware repos for this malware and found no indication C2 traffic destined for eset subdomains.  

	alert http $HOME_NET any -> $EXTERNAL_NET any (msg:"ETPRO TROJAN Bolek/Kbot CnC Checkin"; flow:established,to_server; urilen:1; content:"POST"; http_method; pcre:"/^[x20-x7ern]{0,20}[^x20-x7ern]/Ps"; content:".eset.com"; http_host; isdataat:!1,relative; http_header_names; content:"|0d 0a|Host|0d 0a|Content-Length|0d 0a|Connection|0d 0a|"; depth:36; fast_pattern; content:!"Accept"; content:!"Referer"; metadata: former_category MALWARE; reference:md5,24a497e3993289168455f12d11f0430f; reference:md5,2d7ce4c681bdbddf4ab2740f5fb589dc; classtype:trojan-activity; sid:2820288; rev:5; metadata:created_at 2016_05_20, updated_at 2020_02_11;) 

	https://securelist.com/kbot-sometimes-they-come-back/96157/ (https://urldefense.com/v3/__https:/securelist.com/kbot-sometimes-they-come-back/96157/__;!!ORgEfCBsr282Fw!9MK6rbUaP6N_DoD0PDZLpfUpt2Lmz1p-mJU6CqeIrxM0tSLw7aXLrZoBs2afswfOFXJM%24) 

	https://www.virustotal.com/gui/file/406a4fcb391cc8098d1a6578e2609c21f0f59ca2386f926e3438c57e4549c966/behavior/VirusTotal%20Cuckoofork (https://urldefense.com/v3/__https:/www.virustotal.com/gui/file/406a4fcb391cc8098d1a6578e2609c21f0f59ca2386f926e3438c57e4549c966/behavior/VirusTotal*20Cuckoofork__;JQ!!ORgEfCBsr282Fw!9MK6rbUaP6N_DoD0PDZLpfUpt2Lmz1p-mJU6CqeIrxM0tSLw7aXLrZoBs2afs0dE7LiA%24)  

	Stuart Gonzalez / Chief Bot Officer
stu at perchsecurity.com (mailto:stu at perchsecurity.com) / 713.591.1602 

perchsecurity.com (https://urldefense.com/v3/__https:/perchsecurity.com__;!!ORgEfCBsr282Fw!9MK6rbUaP6N_DoD0PDZLpfUpt2Lmz1p-mJU6CqeIrxM0tSLw7aXLrZoBs2afs-VGCy0A%24) |  Perch Blog (https://urldefense.com/v3/__http:/www.perchsecurity.com/blog__;!!ORgEfCBsr282Fw!9MK6rbUaP6N_DoD0PDZLpfUpt2Lmz1p-mJU6CqeIrxM0tSLw7aXLrZoBs2afs0ySdime%24)  | Product Support (mailto:help at perchsecurity.com) |  SOC Operations (mailto:soc at perchsecurity.com) 

	 (https://urldefense.com/v3/__https:/twitter.com/perchsecurity__;!!ORgEfCBsr282Fw!9MK6rbUaP6N_DoD0PDZLpfUpt2Lmz1p-mJU6CqeIrxM0tSLw7aXLrZoBs2afs2F_T-3c%24) (https://urldefense.com/v3/__https:/www.linkedin.com/company/perchsecurity/__;!!ORgEfCBsr282Fw!9MK6rbUaP6N_DoD0PDZLpfUpt2Lmz1p-mJU6CqeIrxM0tSLw7aXLrZoBs2afs08s1wqf%24) (https://urldefense.com/v3/__https:/perchsecurity.com/perch-news/index.xml__;!!ORgEfCBsr282Fw!9MK6rbUaP6N_DoD0PDZLpfUpt2Lmz1p-mJU6CqeIrxM0tSLw7aXLrZoBs2afs_dNq7tG%24)  
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