Cobalt Stike Beacon Detected – 167[.]99[.]51[.]149:443

The Information provided at the time of posting was detected as “Cobalt Strike”. Depending on when you are viewing this article, it may no longer be the case and could be determined as being a false positive. Please do your own additional validation. – RedPacket Security

TimeStamp 2021-11-10T09:15:57.790498

General Information

3.219478074582346e+41

Cloud Provider	DigitalOcean
Cloud Region	us-nj
Service	N/A
Domains	N/A
Hostnames	N/A
HTTP Host	167[.]99[.]51[.]149
ISP	DigitalOcean, LLC
ORG	DigitalOcean, LLC
OS	N/A
HTTP	N/A
HTTP HTML HASH	N/A
HTTP LOCATION	/
HTTP REDIRECTS
HTTP ROBOTS	N/A
HTTP ROBOTS HASH	N/A
HTTP SECURITY.TXT	N/A
HTTP SECURITY.TXT HASH	N/A
HTTP SERVER	N/A
HTTP SITEMAP	N/A
HTTP SITEMAP HASH	N/A
HTTP TITLE	N/A
LOCATION (AREA CODE)	N/A
LOCATION (CITY)	Clifton
LOCATION (COUNTRY CODE)	US
LOCATION (COUNTRY NAME)	United States
LOCATION (LATITUDE)	40.8344
LOCATION (LONGITUDE)	-74.1377
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	N/A
SSL FINGERPRINT (SHA1)	c4ee5d361d0ad0c90add33dcc856a5618f910deb
SSL ISSUED	20211108183819Z
SSL EXPIRES	20220206183818Z
SSL CYPHER	ECDHE-RSA-AES256-GCM-SHA384
SSL VERSION	TLSv1/SSLv3
SSL TRUST (REVOKED)	N/A
TAGS	cloud

Cobalt Strike Beacon Information

Beacon Type	HTTPS
http-get.client	Accept: */*, Host: www[.]microsoft[.]com, session-token=, skin=noskin;, csm-hit=s-24KU11BB82RZGH3D8BDK|6417896017566, Cookie
http-post.client	Accept: */*, Content-Type: text/xml, X-Requested-With: XMLHttpRequest, Host: www[.]microsoft[.]com, sz=160×600, oe=oe=ISO-8859-1;, sn, s=3717
DNS Beacon MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	35
dns-beacon.strategy_fail_seconds	-1
dns-beacon.strategy_rotate_seconds	-1
dns-beacon.strategy_fail_x	-1
HTTP GET URI	ex-update10[.]microsoft-essentials[.]com,/u/vercheck,167[.]99[.]51[.]149,/u/vercheck
HTTP POST URI	/u/version_status
Max GET Size	1048576
Port	443
post-ex.spawnto_x64	%windir%\sysnative\svchost[.]exe -k netsvcs
post-ex.spawnto_x86	%windir%\syswow64\svchost[.]exe -k netsvcs
process-inject.startrwx	64
process-inject.userwx	32
process-inject.allocator	N/A
proxy.behavior	2 (Use IE settings)
sleeptime	12000
useragent_header	Microsoft Windows Update Agent
uses_cookies	1
process-inject.execute	ntdll.dll:RtlUserThreadStart, SetThreadContext, RtlCreateUserThread
Watermark	109155718
Beacon Stage Cleanup	N/A