Cobalt Stike Beacon Detected – 3[.]81[.]228[.]82:443

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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 2021-11-11T23:32:24.808591

Cobalt Strike
Cobalt Strike

General Information

146473198
Cloud ProviderAmazon
Cloud Regionus-east-1
ServiceAMAZON
Domainsamazonaws[.]com
Hostnamesec2-3-81-228-82[.]compute-1[.]amazonaws[.]com
HTTP Host3[.]81[.]228[.]82
ISPAmazon.com, Inc.
ORGAmazon Data Services NoVa
OSN/A
HTTPN/A
HTTP HTML HASHN/A
HTTP LOCATION/
HTTP REDIRECTS
HTTP ROBOTSN/A
HTTP ROBOTS HASHN/A
HTTP SECURITY.TXTN/A
HTTP SECURITY.TXT HASHN/A
HTTP SERVERN/A
HTTP SITEMAPN/A
HTTP SITEMAP HASHN/A
HTTP TITLEN/A
LOCATION (AREA CODE)N/A
LOCATION (CITY)Ashburn
LOCATION (COUNTRY CODE)US
LOCATION (COUNTRY NAME)United States
LOCATION (LATITUDE)39.04372
LOCATION (LONGITUDE)-77.48749
LOCATION (POSTAL CODE)N/A
SSL SERIAL
SSL EXPIREDN/A
SSL FINGERPRINT (SHA1)6ece5ece4192683d2d84e25b0ba7e04f9cb7eb7c
SSL ISSUED20150520182624Z
SSL EXPIRES20250517182624Z
SSL CYPHERECDHE-RSA-AES256-GCM-SHA384
SSL VERSIONTLSv1/SSLv3
SSL TRUST (REVOKED)N/A
TAGScloud, self-signed


Cobalt Strike Beacon Information

Beacon TypeHTTPS
http-get.clienttrack=9, src=usd, dst=hkd, Accept: */*, Cookie: SID=, _uX, stream
http-post.clientAccept: */*, {“src”:”usd”,”dst”:”hkd”,”enc”:, “}, SID=, Cookie
DNS Beacon MaxDNSN/A
DNS Beacon IdleN/A
Beacon JitterN/A
dns-beacon.strategy_fail_seconds-1
dns-beacon.strategy_rotate_seconds-1
dns-beacon.strategy_fail_x-1
HTTP GET URIdownload[.]visualstudio[.]microsoft[.]com,/live
HTTP POST URI/update
Max GET Size1398135
Port443
post-ex.spawnto_x64%windir%\sysnative\werfault[.]exe
post-ex.spawnto_x86%windir%\syswow64\werfault[.]exe
process-inject.startrwx64
process-inject.userwx32
process-inject.allocator1
proxy.behavior2 (Use IE settings)
sleeptime10000
useragent_headerMozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/71.0.3578.98 Safari/537.36
uses_cookies1
process-inject.executentdll:RtlUserThreadStart, CreateThread, NtQueueApcThread-s, CreateRemoteThread, RtlCreateUserThread
Watermark1431706260
Beacon Stage Cleanup1
Available for Amazon Prime