Cobalt Stike Beacon Detected – 139[.]162[.]76[.]207:443

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 2021-11-09T16:40:16.306433

General Information

74571047

Cloud Provider	Linode
Cloud Region	jp-13
Service	N/A
Domains	linode[.]com
Hostnames	li1556-207[.]members[.]linode[.]com
HTTP Host	139[.]162[.]76[.]207
ISP	Linode, LLC
ORG	139.162.0.0/16
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)	Tokyo
LOCATION (COUNTRY CODE)	JP
LOCATION (COUNTRY NAME)	Japan
LOCATION (LATITUDE)	35.6895
LOCATION (LONGITUDE)	139.69171
LOCATION (POSTAL CODE)	N/A
SSL SERIAL
SSL EXPIRED	true
SSL FINGERPRINT (SHA1)	79ee88a132a909d2c4d6b6bca36aec4e42ae1016
SSL ISSUED	20200110060703Z
SSL EXPIRES	20200409060703Z
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	Referer: https://www[.]google[.]com, Accept: text/xml,application/xml,application/xhtml+xml,text/html;q=0[.]9,text/plain;q=0[.]8,image/png,*/*;q=0[.]5, Accept-Language: en-us,en;q=0[.]5, Signature
http-post.client	Content-Type: application/octet-stream, id
DNS Beacon MaxDNS	255
DNS Beacon Idle	N/A
Beacon Jitter	15
dns-beacon.strategy_fail_seconds	N/A
dns-beacon.strategy_rotate_seconds	N/A
dns-beacon.strategy_fail_x	N/A
HTTP GET URI	banweb[.]cityu[.]dev,/include/template/ClassSvc[.]php,cc12234[.]cityu[.]dev,/center/gateway/common[.]php,lb23311[.]cityu[.]dev,/include/template/ClassSvc[.]php
HTTP POST URI	/modules/mod_search.php
Max GET Size	2097310
Port	443
post-ex.spawnto_x64	%windir%\sysnative\dllhost[.]exe
post-ex.spawnto_x86	%windir%\syswow64\dllhost[.]exe
process-inject.startrwx	64
process-inject.userwx	64
process-inject.allocator	N/A
proxy.behavior	2 (Use IE settings)
sleeptime	45000
useragent_header	Mozilla/6.0 (Windows; U; MSIE 7.0; Windows NT 6.0) Java/1.5.0_08
uses_cookies	N/A
process-inject.execute	CreateThread, SetThreadContext, CreateRemoteThread, RtlCreateUserThread
Watermark	1873433027
Beacon Stage Cleanup	N/A