121.4.38.18
C2 Infrastructure CobaltStrike Indicator 121.4.38.18 Type ip Category C2 Infrastructure Family CobaltStrike Hosting Tencent cloud computing (Beijing) Co., Ltd. Confidence high VT Score 7/94 Source shodan First Seen 2026-08-28 00:00:24 UTC Last Seen 2026-10-10 00:00:19 UTC Shodan View on Shodan ↗
Raw JSON
{
"cobalt_strike_beacon": {
"x86": {
"beacon_type": "HTTPS",
"dns-beacon.strategy_rotate_seconds": -1,
"useragent_header": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36",
"http-post.client": [
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"__",
"Cookie",
"__output__=",
"__"
],
"maxgetsize": 1398104,
"post-ex.spawnto_x86": "%windir%\\syswow64\\rundll32.exe",
"port": 443,
"sleeptime": 30000,
"uses_cookies": 1,
"proxy.behavior": "2 (Use IE settings)",
"process-inject.execute": [
"CreateThread",
"SetThreadContext",
"CreateRemoteThread",
"RtlCreateUserThread"
],
"process-inject.startrwx": 64,
"post-ex.spawnto_x64": "%windir%\\sysnative\\rundll32.exe",
"process-inject.stub": "222b8f27dbdfba8ddd559eeca27ea648",
"http-get.uri": "121.4.38.18,/api/data",
"watermark": 1234567890,
"dns-beacon.strategy_fail_seconds": -1,
"server.publickey_md5": "733fba11f750eb7449af7c586fd500cd",
"dns-beacon.strategy_fail_x": -1,
"http-post.verb": "POST",
"http-post.uri": "/api/output",
"process-inject.userwx": 64,
"http-get.verb": "GET",
"http-get.client": [
"__data__=",
"__",
"Cookie"
]
},
"x64": {
"beacon_type": "HTTPS",
"dns-beacon.strategy_rotate_seconds": -1,
"useragent_header": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36",
"http-post.client": [
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"__",
"Cookie",
"__output__=",
"__"
],
"maxgetsize": 1398104,
"post-ex.spawnto_x86": "%windir%\\syswow64\\rundll32.exe",
"port": 443,
"sleeptime": 30000,
"uses_cookies": 1,
"proxy.behavior": "2 (Use IE settings)",
"process-inject.execute": [
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"SetThreadContext",
"CreateRemoteThread",
"RtlCreateUserThread"
],
"process-inject.startrwx": 64,
"post-ex.spawnto_x64": "%windir%\\sysnative\\rundll32.exe",
"process-inject.stub": "222b8f27dbdfba8ddd559eeca27ea648",
"http-get.uri": "121.4.38.18,/api/data",
"watermark": 1234567890,
"dns-beacon.strategy_fail_seconds": -1,
"server.publickey_md5": "733fba11f750eb7449af7c586fd500cd",
"dns-beacon.strategy_fail_x": -1,
"http-post.verb": "POST",
"http-post.uri": "/api/output",
"process-inject.userwx": 64,
"http-get.verb": "GET",
"http-get.client": [
"__data__=",
"__",
"Cookie"
]
}
},
"ip": 2030315026,
"http": {
"status": 404,
"robots_hash": null,
"redirects": [],
"title_hash": null,
"securitytxt": null,
"title": null,
"sitemap_hash": null,
"robots": null,
"dom_hash": 0,
"components_hash": 0,
"headers_hash": 2129120964,
"host": "121.4.38.18",
"html": "",
"server_hash": null,
"location": "/",
"components": {},
"securitytxt_hash": null,
"headers": {
"date": "Thu, 27 Aug 2026 18:18:26 GMT",
"content-length": "0",
"content-type": "text/plain"
},
"server": null,
"sitemap": null,
"html_hash": 0
},
"port": 443,
"transport": "tcp",
"cpe23_hash": -527748401,
"location": {
"city": "Shanghai",
"region_code": "SH",
"area_code": null,
"longitude": 121.45806,
"latitude": 31.22222,
"country_code": "CN",
"country_name": "China"
},
"product": "Cobalt Strike Beacon",
"hash": 178246920,
"tags": [
"self-signed"
],
"timestamp": "2026-08-27T18:18:26.465719",
"ssl": {
"chain_sha256": [
"87f2085c32b6a2cc709b365f55873e207a9caa10bffecf2fd16d3cf9d94d390c"
],
"jarm": "2ad2ad16d2ad2ad00042d42d00042ddb04deffa1705e2edc44cae1ed24a4da",
"tlsext": [
{
"id": 43,
"name": "supported_versions"
},
{
"id": 51,
"name": "key_share"
},
{
"id": 10,
"name": "supported_groups"
}
],
"chain": [
"-----BEGIN CERTIFICATE-----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\nb5PF+0kpSK7HUwIdrgZsqz1ORsMToEyv8LvxIyL0DTCLBJSHmgJy\n-----END CERTIFICATE-----\n"
],
"versions": [
"-TLSv1",
"-SSLv2",
"-SSLv3",
"-TLSv1.1",
"TLSv1.2",
"TLSv1.3"
],
"acceptable_cas": [],
"alpn": [],
"cert": {
"sig_alg": "sha256WithRSAEncryption",
"issued": "20150520182624Z",
"expires": "20250517182624Z",
"pubkey": {
"bits": 2048,
"type": "rsa"
},
"version": 2,
"extensions": [
{
"data": "\\x04\\x14sk^\\xdb\\xcf\\xc9\\x19\\x1d[\\xd0\\x1f\\x8c\\xe3\\xabV8\\x18\\x9f\\x02O",
"name": "subjectKeyIdentifier"
}
],
"fingerprint": {
"sha256": "87f2085c32b6a2cc709b365f55873e207a9caa10bffecf2fd16d3cf9d94d390c",
"sha1": "6ece5ece4192683d2d84e25b0ba7e04f9cb7eb7c"
},
"serial": 146473198,
"issuer": {
"C": "",
"CN": "",
"L": "",
"O": "",
"ST": "",
"OU": ""
},
"expired": true,
"subject": {
"C": "",
"CN": "",
"L": "",
"O": "",
"ST": "",
"OU": ""
}
},
"cipher": {
"version": "TLSv1.3",
"bits": 256,
"name": "TLS_AES_256_GCM_SHA384"
},
"trust": {
"revoked": false,
"browser": null
},
"handshake_states": [
"before SSL initialization",
"SSLv3/TLS write client hello",
"SSLv3/TLS read server hello",
"TLSv1.3 read encrypted extensions",
"SSLv3/TLS read server certificate",
"TLSv1.3 read server certificate verify",
"SSLv3/TLS read finished",
"SSLv3/TLS write change cipher spec",
"SSLv3/TLS write finished",
"SSL negotiation finished successfully"
],
"ja3s": "f03a69cfa3944d6d51bc52febd87a1a8",
"ocsp": {}
},
"hostnames": [],
"org": "Tencent cloud computing (Beijing) Co., Ltd.",
"data": "HTTP/1.1 404 Not Found\r\nDate: Thu, 27 Aug 2026 18:18:26 GMT\r\nContent-Type: text/plain\r\nContent-Length: 0\r\n\r\n\nCobalt Strike Beacon:\n x86:\n beacon_type: HTTPS\n dns-beacon.strategy_fail_seconds: -1\n dns-beacon.strategy_fail_x: -1\n dns-beacon.strategy_rotate_seconds: -1\n http-get.client:\n __data__=\n __\n Cookie\n http-get.uri: 121.4.38.18,/api/data\n http-get.verb: GET\n http-post.client:\n __id__=\n __\n Cookie\n __output__=\n __\n http-post.uri: /api/output\n http-post.verb: POST\n maxgetsize: 1398104\n port: 443\n post-ex.spawnto_x64: %windir%\\sysnative\\rundll32.exe\n post-ex.spawnto_x86: %windir%\\syswow64\\rundll32.exe\n process-inject.execute:\n CreateThread\n SetThreadContext\n CreateRemoteThread\n RtlCreateUserThread\n process-inject.startrwx: 64\n process-inject.stub: 222b8f27dbdfba8ddd559eeca27ea648\n process-inject.userwx: 64\n proxy.behavior: 2 (Use IE settings)\n server.publickey_md5: 733fba11f750eb7449af7c586fd500cd\n sleeptime: 30000\n useragent_header: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36\n uses_cookies: 1\n watermark: 1234567890\n x64:\n beacon_type: HTTPS\n dns-beacon.strategy_fail_seconds: -1\n dns-beacon.strategy_fail_x: -1\n dns-beacon.strategy_rotate_seconds: -1\n http-get.client:\n __data__=\n __\n Cookie\n http-get.uri: 121.4.38.18,/api/data\n http-get.verb: GET\n http-post.client:\n __id__=\n __\n Cookie\n __output__=\n __\n http-post.uri: /api/output\n http-post.verb: POST\n maxgetsize: 1398104\n port: 443\n post-ex.spawnto_x64: %windir%\\sysnative\\rundll32.exe\n post-ex.spawnto_x86: %windir%\\syswow64\\rundll32.exe\n process-inject.execute:\n CreateThread\n SetThreadContext\n CreateRemoteThread\n RtlCreateUserThread\n process-inject.startrwx: 64\n process-inject.stub: 222b8f27dbdfba8ddd559eeca27ea648\n process-inject.userwx: 64\n proxy.behavior: 2 (Use IE settings)\n server.publickey_md5: 733fba11f750eb7449af7c586fd500cd\n sleeptime: 30000\n useragent_header: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36\n uses_cookies: 1\n watermark: 1234567890\n",
"asn": "AS45090",
"cpe23": [
"cpe:2.3:a:helpsystems:cobalt_strike"
],
"isp": "Shenzhen Tencent Computer Systems Company Limited",
"cpe": [
"cpe:/a:helpsystems:cobalt_strike"
],
"domains": [],
"ip_str": "121.4.38.18",
"os": null,
"_shodan": {
"region": "eu",
"module": "https",
"ptr": true,
"options": {},
"id": "de31a2ef-1266-4569-aa37-1d0ae1126f5b",
"crawler": "b7e172aad7e9ee5ee713a53e504c71bd19d7b284"
}
}