Cobalt Stike Beacon Detected – 149[.]28[.]42[.]139:443

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 2021-11-19T11:59:39.467274

General Information

4.156350939359085e+41

Cloud Provider	Vultr
Cloud Region	N/A
Service	N/A
Domains	vultr[.]com
Hostnames	149[.]28[.]42[.]139[.]vultr[.]com
HTTP Host	149[.]28[.]42[.]139
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)	Philadelphia
LOCATION (COUNTRY CODE)	US
LOCATION (COUNTRY NAME)	United States
LOCATION (LATITUDE)	39.95233
LOCATION (LONGITUDE)	-75.16379
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	N/A
SSL FINGERPRINT (SHA1)	22c218e159947419a36741519da8e17020df8d36
SSL ISSUED	20211108184218Z
SSL EXPIRES	20220206184217Z
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-24KU11BB82RZSYGJ3BDK|1419899012996, 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=3717, 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	-1
dns-beacon.strategy_rotate_seconds	-1
dns-beacon.strategy_fail_x	-1
HTTP GET URI	149[.]28[.]42[.]139,/s/ref=nb_sb_noss_1/167-3294888-0262949/field-keywords=books
HTTP POST URI	/N4215/adj/amzn.us.sr.aps
Max GET Size	1048576
Port	443
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 6.1; WOW64; Trident/7.0; rv:11.0) like Gecko
uses_cookies	1
process-inject.execute	CreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark	807863285
Beacon Stage Cleanup	N/A