Cobalt Stike Beacon Detected – 119[.]29[.]119[.]234:8443

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 2021-11-10T04:01:08.344729

General Information

1398828437

Cloud Provider	Tencent Cloud
Cloud Region	N/A
Service	N/A
Domains	N/A
Hostnames	N/A
HTTP Host	119[.]29[.]119[.]234
ISP	Shenzhen Tencent Computer Systems Company Limited
ORG	Tencent cloud computing (Beijing) Co., Ltd.
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)	Beijing
LOCATION (COUNTRY CODE)	CN
LOCATION (COUNTRY NAME)	China
LOCATION (LATITUDE)	39.9075
LOCATION (LONGITUDE)	116.39723
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	N/A
SSL FINGERPRINT (SHA1)	86372c5d2e3af5ce6907a6bc2902f4a99a0fce1c
SSL ISSUED	20210302120932Z
SSL EXPIRES	20220302120932Z
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	Accept: */*, Host: download[.]windowsupdate[.]com, [.]cab
http-post.client	Accept: */*, download[.]windowsupdate[.]com/c/, Host, [.]cab
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	119[.]29[.]119[.]234,/c/msdownload/update/others/2016/12/29136388_
HTTP POST URI	/c/msdownload/update/others/2016/12/3215234_
Max GET Size	1048576
Port	8443
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	60000
useragent_header	Windows-Update-Agent/10.0.10011.16384 Client-Protocol/1.40
uses_cookies	N/A
process-inject.execute	CreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark	1359593325
Beacon Stage Cleanup	N/A