Cobalt Stike Beacon Detected – 54[.]183[.]123[.]73:8443

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 2021-11-11T22:37:49.293186

General Information

3.4465360469384672e+41

Cloud Provider	Amazon
Cloud Region	us-west-1
Service	AMAZON
Domains	amazonaws[.]com
Hostnames	ec2-54-183-123-73[.]us-west-1[.]compute[.]amazonaws[.]com
HTTP Host	54[.]183[.]123[.]73
ISP	Amazon.com, Inc.
ORG	Amazon Technologies Inc.
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)	San Jose
LOCATION (COUNTRY CODE)	US
LOCATION (COUNTRY NAME)	United States
LOCATION (LATITUDE)	37.33939
LOCATION (LONGITUDE)	-121.89496
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	N/A
SSL FINGERPRINT (SHA1)	28b5b3e65f51156468fed29eb6e58e94850de751
SSL ISSUED	20210825022429Z
SSL EXPIRES	20211123022428Z
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: text/html, text/plain, */*, Accept-Language: zh-CN,zh;q=0[.]8,zh-TW;q=0[.]7,zh-HK;q=0[.]5,en-US;q=0[.]3,en;q=0[.]2, Connection: Keep-Alive, Cache-Control: no-cache, BIGIpServerPOOL_ID, osname=win, channel=stable, milestone=80
http-post.client	Accept: text/html, text/plain, */*, Accept-Language: zh-CN,zh;q=0[.]8,zh-TW;q=0[.]7,zh-HK;q=0[.]5,en-US;q=0[.]3,en;q=0[.]2, Connection: Keep-Alive, Cache-Control: no-cache, x-client-id, x-encrypt-data
DNS Beacon MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	20
dns-beacon.strategy_fail_seconds	N/A
dns-beacon.strategy_rotate_seconds	N/A
dns-beacon.strategy_fail_x	N/A
HTTP GET URI	dzf7f2mb4xz8o[.]cloudfront[.]net,/v1/updateCheck
HTTP POST URI	/v1/releaseMgr
Max GET Size	1398102
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	10000
useragent_header	Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebkit/537.36 Chrome/71.0.3578.98
uses_cookies	N/A
process-inject.execute	CreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark	1359593325
Beacon Stage Cleanup	N/A