Cobalt Stike Beacon Detected – 45[.]77[.]187[.]151:443

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 2021-11-09T02:53:57.659950

General Information

146473198

Cloud Provider	Vultr
Cloud Region	N/A
Service	N/A
Domains	vultr[.]com
Hostnames	45[.]77[.]187[.]151[.]vultr[.]com
HTTP Host	45[.]77[.]187[.]151
ISP	The Constant Company, LLC
ORG	Vultr Holdings, 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)	Mountain View
LOCATION (COUNTRY CODE)	US
LOCATION (COUNTRY NAME)	United States
LOCATION (LATITUDE)	37.38605
LOCATION (LONGITUDE)	-122.08385
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	N/A
SSL FINGERPRINT (SHA1)	6ece5ece4192683d2d84e25b0ba7e04f9cb7eb7c
SSL ISSUED	20150520182624Z
SSL EXPIRES	20250517182624Z
SSL CYPHER	ECDHE-RSA-AES256-GCM-SHA384
SSL VERSION	TLSv1/SSLv3
SSL TRUST (REVOKED)	N/A
TAGS	cloud, self-signed

Cobalt Strike Beacon Information

Beacon Type	HTTPS
http-get.client	Host: d3lmob12otz3mw[.]cloudfront[.]net, Accept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Accept-Language: en-US,en;q=0[.]5, REF=ID=6Z4zQd, Cookie
http-post.client	Host: d3lmob12otz3mw[.]cloudfront[.]net, Accept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*;q=0[.]8, Accept-Language: en-US,en;q=0[.]5, U=6Z4zQd, REF=ID=, Cookie
DNS Beacon MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	10
dns-beacon.strategy_fail_seconds	N/A
dns-beacon.strategy_rotate_seconds	N/A
dns-beacon.strategy_fail_x	N/A
HTTP GET URI	d3lmob12otz3mw[.]cloudfront[.]net,/safebrowsing/WmpZG/awkJb3GbrhrIrxW4ukgIRTe8K6o3UoJHDOVJwPVu48
HTTP POST URI	/safebrowsing/Yg-l/E9ZE5qElK19Cvr3zust7h86B19B
Max GET Size	1048576
Port	443
post-ex.spawnto_x64	%windir%\sysnative\gpupdate[.]exe
post-ex.spawnto_x86	%windir%\syswow64\gpupdate[.]exe
process-inject.startrwx	64
process-inject.userwx	32
process-inject.allocator	N/A
proxy.behavior	2 (Use IE settings)
sleeptime	5000
useragent_header	Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/77.0.3818.0 Safari/537.36 Edg/77.0.188.0
uses_cookies	1
process-inject.execute	ntdll.dll:RtlUserThreadStart, NtQueueApcThread-s, SetThreadContext, CreateRemoteThread, kernel32.dll:LoadLibraryA, RtlCreateUserThread
Watermark	1359593325
Beacon Stage Cleanup	1