Cobalt Stike Beacon Detected – 104[.]131[.]30[.]201:443

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 2021-11-18T03:36:58.963508

General Information

146473198

Cloud Provider	DigitalOcean
Cloud Region	us-nj
Service	N/A
Domains	N/A
Hostnames	N/A
HTTP Host	104[.]131[.]30[.]201
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	Microsoft-IIS/8.5
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)	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: avast[.]com, Connection: close, LSID=, Cookie, apply=false
http-post.client	Host: avast[.]com, Connection: close, Content-Type: text/plain, __session__id=, Cookie
DNS Beacon MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	39
dns-beacon.strategy_fail_seconds	N/A
dns-beacon.strategy_rotate_seconds	N/A
dns-beacon.strategy_fail_x	N/A
HTTP GET URI	104[.]131[.]30[.]201,/language[.]js
HTTP POST URI	/Content
Max GET Size	1398982
Port	443
post-ex.spawnto_x64	%windir%\system32\rundll32[.]exe
post-ex.spawnto_x86	%windir%\system32\rundll32[.]exe
process-inject.startrwx	4
process-inject.userwx	32
process-inject.allocator	N/A
proxy.behavior	2 (Use IE settings)
sleeptime	3787
useragent_header	Mozilla/5.0 (iPhone; CPU iPhone OS 12_0 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0
uses_cookies	1
process-inject.execute	CreateThread, CreateRemoteThread, RtlCreateUserThread
Watermark	N/A
Beacon Stage Cleanup	1