C2IntelFeeds

Automatically created C2 Feeds | Also posted via @drb_ra

• Feeds ( Source/Raw Data courtesy of Censys - https://censys.io/ )
  Search 2.0 has massively improved detection rates on non-standard ports. Great job Censys Team!

  By default C2s seen active in the last 7 days are added to the main feed files. There is also a 30 day feed for any C2 seen live in the last 30 days.

  • C2 IPs - Live C2 IP (no frontend or CDN IPs - All bad)
  • C2 Domains - All domain names extracted from implants, including domain fronting values and fake Host headers (High abuse of MS, Apple and Google).
  • C2 Domains Filtered - Excludes several domains abused in domain fronting, along with fake headers for popular sites. Current filter list see: exclusions.rex file
  • C2 Domains with URL - Same as domains and domains filtered but including an extra column with the URI path of the C2
  • C2 Domains with URL and IP - Same as domains and domains filtered but including an extra column with the URI path of the C2 and another with the C2 IP
  • Unverified C2 IPs - Live C2 IPs based simply on the Censys search/query no validation can easily be performed or further configuration extracted. Some however are extremely accurate. Details in table below.

NOTE: Given the issue with Threatfox submissions we have now published 4 additional files. These files contain IP and destination port pairs for all IP based feeds (IPs and Unverified IPs both for 7 and 30 days).

Censys Searches

Tool	Censys Search
Sliver	(services.tls.certificates.leaf_data.subject.common_name="multiplayer" and same_service(services.jarm.fingerprint= 00000000000000000043d43d00043de2a97eabb398317329f027c66e4c1b01 and NOT services.port=31337 )) OR (services.banner_hashes="sha256:1f25c454ae331c582fbdb7af8a9839785a795b06a6649d92484b79565f7174ae" and services.jarm.fingerprint=3fd21b20d00000021c43d21b21b43d41226dd5dfc615dd4a96265559485910) OR same_service(services.tls.certificates.leaf_data.pubkey_bit_size: 2048 and services.tls.certificates.leaf_data.subject.organization: /(ACME|Partners|Tech|Cloud|Synergy|Test|Debug)? ?(co|llc|inc|corp|ltd)?/ and services.jarm.fingerprint: 3fd21b20d00000021c43d21b21b43d41226dd5dfc615dd4a96265559485910 and services.tls.certificates.leaf_data.subject.country: US and services.tls.certificates.leaf_data.subject.postal_code: /<1001-9999>/)
Covenant	same_service(services.tls.certificates.leaf_data.subject_dn="CN=Covenant" AND services.tls.certificates.leaf_data.issuer_dn="CN=Covenant") OR (services.software.product="Kestrel web server" AND services.http.response.html_title="Covenant")
Brute Ratel C4	services.http.response.body_hash="sha1:1a279f5df4103743b823ec2a6a08436fdf63fe30" OR same_service(services.http.response.body_hash="sha1:bc3023b36063a7681db24681472b54fa11f0d4ec" and services.jarm.fingerprint="3fd21b20d00000021c43d21b21b43de0a012c76cf078b8d06f4620c2286f5e")
Mythic	same_service(services.tls.certificates.leaf_data.subject_dn="O=Mythic" AND services.http.response.html_title="Mythic") OR services.banner_hashes="sha256:fb8b5d212f449a8ba61ab9ed9b44853315c33d12a07f8ce4642892750e251530" OR services.http.response.favicons.md5_hash="6be63470c32ef458926abb198356006c"
Deimos	services.jarm.fingerprint: "00000000000000000041d00000041d9535d5979f591ae8e547c5e5743e5b64" OR same_service(services.banner_hashes="sha256:38ea755e162c55ef70f9506dddfd01641fc838926af9c43eda652da63c67058b" and services.http.response.body_hashes="sha1:04ca7e137e1e9feead96a7df45bb67d5ab3de190" and services.tls.certificates.leaf_data.subject_dn="O=Acme Co" and services.tls.certificates.leaf_data.issuer_dn="O=Acme Co" and not services.tls.certificates.leaf_data.names="127.0.0.1:3000")
Nighthawk C2	same_service(services.banner="HTTP/1.1 404 Not Found\r\nDate: <REDACTED>\r\nX-Test: 2\r\nServer: Apache\r\nContent-Length: 20\r\n" and services.http.response.body_hashes="sha256:d872e8e4176213ea84ebc76d8fb621c31b4ca116fd0a51258813e804fe110ca4")
Bianlian Go Trojan	same_service(services.tls.certificates.leaf_data.subject_dn=/C=[0-9a-zA-Z]{16}, O=[0-9a-zA-Z]{16}, OU=[0-9a-zA-Z]{16}/ AND services.tls.certificates.leaf_data.issuer_dn=/C=[0-9a-zA-Z]{16}, O=[0-9a-zA-Z]{16}, OU=[0-9a-zA-Z]{16}/)
Havoc	same_service(services.tls.certificates.leaf_data.issuer.organization=/(Acme|ACME|acme|Partners|PARTNERS|partners|Tech|TECH|tech|Cloud|CLOUD|cloud|Synergy|SYNERGY|synergy|Test|TEST|test|Debug|DEBUG|debug)? ?(Co|CO|co|Llc|LLC|llc|Inc|INC|inc|Corp|CORP|corp|Ltd|LTD|ltd)?/ AND services.tls.certificates.leaf_data.issuer.country=US AND services.tls.certificates.leaf_data.issuer.postal_code=/[0-9]{4}/) OR services.http.response.headers.unknown.name: "X-Havoc" OR services.banner_hashes="sha256:f5a45c4aa478a7ba9b44654a929bddc2f6453cd8d6f37cd893dda47220ad9870"
Responder	services.banner="HTTP/1.1 401 Unauthorized\r\nServer: Microsoft-IIS/7.5\r\nDate: <REDACTED>\r\nContent-Type: text/html\r\nWWW-Authenticate: NTLM\r\nContent-Length: 0\r\n" OR services.banner_hashes="sha256:0fa31c8c34a370931d8ffe8097e998f778db63e2e036fbd7727a71a0dcf5d28c" OR services.smb.negotiation_log.server_guid="00000000000000000000000000000000ee85abf7eaf60c4f928192476deb76a9"
Pupy RAT	same_service(services.http.response.headers.Etag:"aa3939fc357723135870d5036b12a67097b03309" AND services.http.response.headers.Server="nginx/1.13.8") OR same_service(services.tls.certificates.leaf_data.issuer.organization:/[a-zA-Z]{10}/ AND services.tls.certificates.leaf_data.subject.organization:/[a-zA-Z]{10}/ AND services.tls.certificates.leaf_data.subject.organizational_unit="CONTROL")
Qakbot	same_service(services.jarm.fingerprint={"21d14d00021d21d21c42d43d0000007abc6200da92c2a1b69c0a56366cbe21","04d02d00004d04d04c04d02d04d04d9674c6b4e623ae36cc2d998e99e2262e"} AND services.http.response.body_hash="sha1:22e5446e82b3e46da34b5ebce6de5751664fb867") OR same_service(services.banner_hashes="sha256:5234096d7003929ad67037af6f5816933cab9e85f9b286468249ac9ab9bfb861" AND services.http.response.body_hash="sha1:22e5446e82b3e46da34b5ebce6de5751664fb867") OR (services.tls.certificates.leaf_data.subject_dn: /C=[A-Z]{2}, OU=([A-Z][a-z]{3,})( [A-Z][a-z]{3,}){0,2}, CN=[a-z]{4,12}\.[a-z]{2,4}/ and not services.tls.certificates.leaf_data.subject_dn:"OU=Domain Control Validated")
DcRat	services.tls.certificates.leaf_data.issuer_dn="CN=DcRat Server, OU=qwqdanchun, O=DcRat By qwqdanchun, L=SH, C=CN"
Viper	services.http.response.body_hashes="sha1:cd40dbcdae84b1c8606f29342066547069ed5a33" OR services.http.response.favicons.md5_hash="a7469955bff5e489d2270d9b389064e1"
Supershell	services.http.response.html_title="Supershell - 登录" OR services.http.response.body_hashes="sha256:21ec9c71669486c5b874b1be3b9c341133e83939fdbeefa2080df1b1703c4928"
Pikabot	services: (tls.certificates.leaf_data.signature.self_signed: true and http.response.headers: (key: "Etag" and value.headers: '"3147526947+gzip"') and not tls.certificate.parsed.subject_dn: "emailAddress=") or services: (tls.certificates.leaf_data.signature.self_signed: true and tls.cipher_selected="TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256" and tls.certificates.leaf_data.pubkey_bit_size=4096 and tls.certificates.leaf_data.issuer_dn: /C=[A-Z]{2}, ST=[A-Z]{2}, O=([A-Z][a-z]{2,})( [A-Z][a-z\.]{2,}){0,5}, OU=([A-Z][a-z]{2,})( [A-Z][a-z\.]{2,}){0,5}, L=([A-Z][a-z]{2,})( [A-Z][a-z]{2,}){0,2}, CN=.*/)
Meduza Stealer	services.http.response.html_title="Meduza Stealer" OR services.http.response.favicons.md5_hash="e7a2bb050f7ec5ec2ba405400170a27d"
Evilginx/EvilGoPhish	services.software.product: {Evilginx, EvilGoPhish}
Hookbot/Pegasus	services.http.response.html_title="HOOKBOT PANEL" OR services.http.response.favicons.hashes="sha256:b13b77f0b3d95c1146394ea855d915f189d3ea374179755cfb2ac47bfc8f306c"
AsyncRAT	same_service(services.tls.certificates.leaf_data.issuer_dn="CN=AsyncRAT Server" and services.tls.certificates.leaf_data.subject_dn="CN=AsyncRAT Server")
Remcos	same_service(services.tls.versions.ja4s="t130200_1301_234ea6891581" and services.tls.ja3s="eb1d94daa7e0344597e756a1fb6e7054" and services.tls.cipher_selected="TLS_AES_128_GCM_SHA256" and services.jarm.fingerprint: 00000000000000000041d41d0000001798d6156df422564fb9b667b7418e4c and services.service_name="UNKNOWN" and services.tls.certificates.leaf_data.issuer_dn="" and services.tls.certificates.leaf_data.subject_dn="")
DanaBot	[REDACTED]
Rhysida Trojan	[REDACTED]
Oyster Backdoor	[REDACTED]
SocGholish	[REDACTED]
NetSupport Manager RAT	services.http.response.headers.Server="NetSupport Gateway/*"
Geacon_Pro	same_service(services.tls.certificates.leaf_data.subject_dn="C=KZ, ST=KZ, L=, O=NN Fern Sub, OU=NN Fern, CN=foren.zik" AND services.tls.certificates.leaf_data.issuer_dn="C=KZ, ST=KZ, L=, O=NN Fern Sub, OU=NN Fern, CN=foren.zik")
Hak5 Cloud C2	services.software.product: "cloud c2" and services.software.vendor="Hak5"
CHAOS	services.software.uniform_resource_identifier: "cpe:2.3:a:chaos:chaos:*:*:*:*:*:*:*:*"
Interactsh	services.software.uniform_resource_identifier: "cpe:2.3:a:interactsh:interactsh:*:*:*:*:*:*:*:*"
Reverse SSH	[REDACTED]
wstunnel	[REDACTED]
Ligolo-ng	[REDACTED]

NOTE: The last 3 entries are tools that may also be used for legitimate purposes. Please validate your hits or filter these locally for your own needs.

Additional Details

The easiest files for most of you to use should be C2 IPs, C2 Domains Filtered and Unverified C2 IPs or their 30 day counterparts.

• VPN

  • Nord VPN Exit Nodes
  • Proton VPN Entry & Exit Nodes

• C2_configs

  • Detailed CobaltStrike Configuration in CSV and JSON including the following fields: FirstSeen,ip,ASN,BeaconType,C2Server,Port,SleepTime,Jitter,Proxy_Behavior,HostHeader,CertificateNames,HttpGet_Metadata,HttpPostUri,HttpPost_Metadata,KillDate,PipeName,UserAgent,Watermark,DNS_Idle,DNS_Sleep IP reflects the true C2 IP not the one provided in the configuration of the beacon.
  • Version 2 includes 3 additional fields SpawnToX86,SpawnToX64,PublicKey
  • There's also a 30 day JSON only version that includes First and Last Seen dates within the last 30 days.
  • Powershell Empire and PoSHC2 are also avaliable in JSON format.

This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.