Cobalt Stike Beacon Detected – 49[.]233[.]115[.]153:443

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 2021-11-15T22:43:41.767370

General Information

5.4997816643357266e+47

Cloud Provider	Tencent Cloud
Cloud Region	N/A
Service	N/A
Domains	N/A
Hostnames	N/A
HTTP Host	49[.]233[.]115[.]153
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)	3e73cee499a52bd9dd69fa612fe4b50f459b16d4
SSL ISSUED	20211015090100Z
SSL EXPIRES	20361011090100Z
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	Host: mail[.]chinatelecom-hr[.]com, Accept: text/html,application/xhtml+xml,application/xml;q=0[.]9,*/*l;q=0[.]8, Pragma: no-cache, [.]cab
http-post.client	Accept: */*, Host: mail[.]chinatelecom-hr[.]com, Pragma: no-cache, [.]cab
DNS Beacon MaxDNS	N/A
DNS Beacon Idle	N/A
Beacon Jitter	10
dns-beacon.strategy_fail_seconds	-1
dns-beacon.strategy_rotate_seconds	-1
dns-beacon.strategy_fail_x	-1
HTTP GET URI	49[.]233[.]115[.]153,/c/msdownload/update/others/2021/10/29136388_
HTTP POST URI	/c/msdownload/update/others/2021/10/3215234_
Max GET Size	1398102
Port	443
post-ex.spawnto_x64	%windir%\sysnative\wusa[.]exe
post-ex.spawnto_x86	%windir%\syswow64\wusa[.]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/2.31
uses_cookies	N/A
process-inject.execute	CreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark	426352781
Beacon Stage Cleanup	N/A