Cobalt Stike Beacon Detected – 172[.]104[.]171[.]27:4443

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 2021-11-11T19:23:32.756539

General Information

3.3262895583704073e+41

Cloud Provider	Linode
Cloud Region	sg-04
Service	N/A
Domains	linode[.]com
Hostnames	li1762-27[.]members[.]linode[.]com
HTTP Host	172[.]104[.]171[.]27
ISP	Linode, LLC
ORG	Linode
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)	Singapore
LOCATION (COUNTRY CODE)	SG
LOCATION (COUNTRY NAME)	Singapore
LOCATION (LATITUDE)	1.28967
LOCATION (LONGITUDE)	103.85007
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	N/A
SSL FINGERPRINT (SHA1)	cf206af564713436278067666bb9c61bebd3c11a
SSL ISSUED	20210820081906Z
SSL EXPIRES	20211118081905Z
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[.]amazon[.]com, session-token=, skin=noskin;, csm-hit=s-14KU31NB82RZSYGJ3BCM|1418930012601, Cookie
http-post.client	Accept: */*, Content-Type: text/xml, X-Requested-With: XMLHttpRequest, Host: www[.]amazon[.]com, sz=160×600, oe=oe=ISO-8859-1;, sn, s=3733, dc_ref=http%3A%2F%2Fwww[.]amazon[.]com
DNS Beacon MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	N/A
dns-beacon.strategy_fail_seconds	N/A
dns-beacon.strategy_rotate_seconds	N/A
dns-beacon.strategy_fail_x	N/A
HTTP GET URI	172[.]104[.]171[.]27,/s/ref=nb_sb_noss_2/167-32301888-0223019/field-keywords=computers
HTTP POST URI	/N4918/adb/amzn.us.sr.ups
Max GET Size	1048576
Port	4443
post-ex.spawnto_x64	%windir%\sysnative\rundll32[.]exe
post-ex.spawnto_x86	%windir%\syswow64\rundll32[.]exe
process-inject.startrwx	64
process-inject.userwx	64
process-inject.allocator	N/A
proxy.behavior	2 (Use IE settings)
sleeptime	5000
useragent_header	Mozilla/5.0 (Windows NT 10.0; rv:78.0) Gecko/20100101 Firefox/78.0
uses_cookies	1
process-inject.execute	CreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark	1359593325
Beacon Stage Cleanup	N/A