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关于Cobalt Strike检测方法与去特征的思考

作者:血梦 日期:2020-08-18 浏览:346分类: 渗透测试 已提交百度收录

人云亦云

关于检测Cobalt Strike的方法有很多,而网上有一些文章会告诉大家如何修改所谓的特征值,但是这些方法实际上存在一定的误导和盲区

一般发现Cobalt Strike服务器的途径有以下几种(简单分类,不准确,勿喷)

样本分析

中马回连

黑客连主控端

扫描发现

这里被使用的比较多的就是扫描发现,同时网上一些文章提到Cobalt Strike默认的SSL/TLS证书是固定的,所以一般都是使用这个证书作为特征值来发现Cobalt Strike服务器

所以,今天我们主要讨论这个默认SSL/TLS证书的问题

证书修改

现在让我们提取这个证书的相关信息

1597632565.png!small

根据网上一些文章的修改方法,我们需要使用keytool修改证书信息,方法如下

1597632710.png!small

默认的证书具有很明显的特征,例如

O=cobaltstrike, OU=AdvancedPenTesting, CN=Major Cobalt Strike

我们拿这个信息去检索就可以发现许多Cobalt Strike服务器

但是这里忽略了一个问题,你到底修改的是什么证书,是主机上线的时候使用的吗?

这个证书是teamserver主控端使用的加密证书(默认端口50050)

1597632835.png!small

修改这个证书以后teamserver服务器主控端的特征是没了

之前有一些人hunting C2服务器使用的就是这个规则

例如在fofa.so中,就有一条规则叫

protocol=="cobaltstrike"

1597632922.png!small

当然,我们也可以使用

cert="Major Cobalt Strike"

直接搜索

1597632970.png!small

这里需要注意,使用

cert="Major Cobalt Strike"

搜索会发现有一些主机并没有被标注为Cobalt Strike服务器

1597633161.png!small

(存在漏网之鱼

当然为了保证数据的时效性,我们在fofa.so搜索的时候最好加上

after="2020-01-01"

1597633248.png!small

重要的分割线!!!!注意!!!!

但是!https上线使用的证书,并不是上边我们修改的那一个,并且这个证书也是默认的...

证书信息如下图:

1597633305.png!small

如果想要修改这个证书,需要修改Malleable C2 profile

查看官方文档

https://www.cobaltstrike.com/help-malleable-c2

1597634435.png!small

其中Self-signed Certificates with SSL Beacon和Valid SSL Certificates with SSL Beacon是用来修改https上线使用的证书的,Self-signed Certificates with SSL Beacon根据字母意思理解,就是自己设定的自签名证书,还有如果使用了Valid SSL Certificates with SSL Beacon,我们在之前通过keytool设置的证书也可以用的上,但是这里应该让我们使用的是真实的证书,不管是偷来的还是买来的,用就完了

Let's Hunt!

使用fofa.so搜索相关证书信息

cert="73:6B:5E:DB:CF:C9:19:1D:5B:D0:1F:8C:E3:AB:56:38:18:9F:02:4F" && after="2020-01-01"

1597634494.png!small

使用censys.io搜索相关信息

443.https.tls.certificate.parsed.fingerprint_sha256:87f2085c32b6a2cc709b365f55873e207a9caa10bffecf2fd16d3cf9d94d390c

1597634559.png!small

这里我们可以发现一些有趣的现象,例如有些服务器的50050端口也开了,teamserver主控端的证书确实也是修改了,这证明攻击者还是会看一下文章学习如何去特征,但不幸的是只修改了一个

仅仅是扫描ip就能拿到所有证书吗?不能,我们也需要扫描域名,还有就是https也不一定只开在443端口上

据我们了解,好多人搭建C2服务器的方法都比较原始,比如在某云搭建C2服务器,不会使用slb/elb转发请求,不会使用security group控制访问,不会使用一些高明的隐藏C2的方法。并且烂大街的Domain fronting、CDN上线、高信誉服务等等也不会使用,就是上线梭哈一把刷.....真的是给蓝队兄弟们一条生路

等等,到这就完了吗?

检测加密流量

如果这些信息都修改了我们该怎么办那?

实际上还是有方法去检测的

我们可以参考https://github.com/salesforce/ja3这个项目

简单科普一下JA3

JA3方法用于收集Client Hello数据包中以下字段的十进制字节值:版本、可接受的密码、扩展列表、椭圆曲线密码和椭圆曲线密码格式。然后,它将这些值串联在一起,使用“,”来分隔各个字段,同时,使用“-”来分隔各个字段中的各个值。

1597634606.png!small

这里相当于把支持的TLS扩展信息,都收集起来当作一个特征值来用(除了客户端发起的,还有关于服务器的JA3S)

这其实算一种降维打击,并且我们发现主流在线沙箱、主流IDS大都支持了JA3/JA3S指纹检测

因为本篇文章主要是讨论Cobalt Strike默认证书的问题,所以在这里就不过多介绍JA3/JA3S相关的信息了

IOCs:

2[.]56.212.165

3[.]106.130.137

3[.]11.62.87

3[.]121.32.171

3[.]128.154.6

3[.]129.110.164

3[.]129.19.175

3[.]130.5.32

3[.]130.75.203

3[.]135.199.11

3[.]16.137.85

3[.]218.141.232

3[.]22.141.197

3[.]22.195.74

3[.]234.252.217

3[.]234.255.7

3[.]236.183.143

3[.]25.149.16

3[.]25.162.235

3[.]25.177.162

3[.]25.180.21

3[.]80.164.184

3[.]95.136.233

3[.]95.159.27

5[.]149.253.199

5[.]180.99.65

5[.]188.206.219

5[.]39.216.203

5[.]39.217.115

5[.]39.221.60

5[.]45.64.36

5[.]8.18.50

8[.]210.152.83

8[.]210.52.10

13[.]124.92.145

13[.]211.161.113

13[.]211.170.37

13[.]211.180.107

13[.]229.222.207

13[.]236.208.125

13[.]54.198.47

13[.]59.192.233

13[.]91.4.128

18[.]130.144.147

18[.]130.155.157

18[.]163.206.98

18[.]163.46.190

18[.]166.31.113

18[.]215.167.27

18[.]216.51.155

18[.]217.19.176

18[.]217.54.127

18[.]224.234.85

23[.]101.204.40

23[.]106.215.179

23[.]248.162.142

23[.]254.202.217

23[.]254.228.89

23[.]254.229.35

23[.]254.230.60

23[.]82.185.91

23[.]82.185.96

23[.]83.248.105

27[.]102.118.181

27[.]102.118.187

27[.]102.118.190

31[.]14.40.230

31[.]210.91.217

31[.]220.43.160

31[.]44.184.125

31[.]44.184.131

31[.]44.184.48

31[.]44.184.49

31[.]44.184.50

31[.]44.184.51

31[.]44.184.53

31[.]44.184.55

34[.]204.3.10

34[.]209.40.26

34[.]212.83.227

34[.]221.2.201

34[.]224.157.70

34[.]230.68.206

34[.]238.192.43

34[.]67.180.214

34[.]80.144.150

34[.]84.39.173

34[.]87.76.219

34[.]92.237.246

34[.]92.57.181

34[.]94.33.19

34[.]96.129.197

34[.]96.245.66

34[.]97.55.204

35[.]164.172.115

35[.]176.207.20

35[.]201.164.132

35[.]203.173.196

35[.]225.244.45

35[.]234.156.244

35[.]235.89.222

35[.]241.125.159

36[.]133.35.7

39[.]100.119.37

39[.]100.233.99

39[.]100.65.99

39[.]100.72.108

39[.]101.174.86

39[.]101.207.137

39[.]101.207.158

39[.]102.37.102

39[.]102.40.225

39[.]102.52.75

39[.]104.162.182

39[.]105.106.14

39[.]105.202.243

39[.]105.229.27

39[.]105.23.21

39[.]105.24.37

39[.]105.55.133

39[.]105.59.107

39[.]105.69.107

39[.]106.107.82

39[.]106.144.55

39[.]106.205.34

39[.]106.21.92

39[.]106.219.95

39[.]106.223.146

39[.]106.81.105

39[.]106.85.139

39[.]106.9.248

39[.]107.101.223

39[.]107.111.157

39[.]107.221.136

39[.]107.231.0

39[.]107.59.30

39[.]107.99.0

39[.]108.181.99

39[.]108.185.207

39[.]108.195.174

39[.]108.236.227

39[.]108.5.55

39[.]108.95.18

39[.]96.1.24

39[.]96.10.181

39[.]96.12.238

39[.]96.13.114

39[.]96.63.97

39[.]97.126.8

39[.]97.187.94

39[.]97.188.94

39[.]97.232.51

39[.]98.157.103

39[.]98.171.162

39[.]98.203.19

40[.]122.106.213

40[.]127.129.199

40[.]70.64.23

40[.]73.6.221

42[.]159.86.108

43[.]224.35.134

43[.]225.30.90

43[.]226.148.151

43[.]226.153.250

43[.]226.26.242

43[.]240.15.68

43[.]242.201.199

43[.]246.208.208

43[.]246.208.225

43[.]246.208.240

43[.]248.124.189

45[.]10.20.166

45[.]11.180.108

45[.]11.180.220

45[.]11.79.20

45[.]113.2.107

45[.]114.10.17

45[.]124.64.53

45[.]134.168.146

45[.]137.10.116

45[.]138.172.81

45[.]138.209.75

45[.]142.124.196

45[.]145.185.68

45[.]153.241.16

45[.]192.118.162

45[.]192.118.163

45[.]192.118.164

45[.]192.118.165

45[.]192.118.166

45[.]248.85.20

45[.]32.116.138

45[.]32.122.112

45[.]32.122.152

45[.]32.32.186

45[.]32.62.198

45[.]32.78.66

45[.]61.136.32

45[.]61.136.46

45[.]66.250.14

45[.]76.106.22

45[.]76.158.91

45[.]76.183.78

45[.]76.208.172

45[.]76.25.185

45[.]77.13.57

45[.]77.143.131

45[.]77.172.168

45[.]77.174.46

45[.]77.18.248

45[.]77.249.181

45[.]77.91.11

45[.]78.67.211

45[.]78.9.49

45[.]82.79.211

45[.]83.140.231

45[.]83.237.19

46[.]166.128.234

46[.]166.129.169

46[.]166.129.170

46[.]166.176.140

46[.]17.98.192

46[.]21.147.5

46[.]255.211.20

46[.]4.157.54

47[.]100.136.26

47[.]100.46.70

47[.]100.48.156

47[.]100.55.126

47[.]100.77.190

47[.]100.89.120

47[.]101.11.214

47[.]101.130.253

47[.]101.149.183

47[.]101.177.45

47[.]101.208.219

47[.]101.35.67

47[.]101.62.0

47[.]102.110.39

47[.]102.86.216

47[.]103.207.83

47[.]103.220.119

47[.]103.220.165

47[.]103.29.187

47[.]103.62.94

47[.]104.108.112

47[.]104.11.169

47[.]104.193.7

47[.]104.238.128

47[.]104.77.93

47[.]104.82.12

47[.]105.146.99

47[.]105.180.183

47[.]105.99.5

47[.]106.70.58

47[.]107.102.61

47[.]107.108.38

47[.]107.136.247

47[.]108.113.23

47[.]108.153.115

47[.]108.60.37

47[.]110.145.60

47[.]110.228.171

47[.]112.184.59

47[.]113.103.131

47[.]113.126.57

47[.]113.94.95

47[.]114.45.227

47[.]114.93.159

47[.]114.93.194

47[.]115.125.106

47[.]115.38.42

47[.]240.43.238

47[.]240.54.247

47[.]244.0.247

47[.]244.13.36

47[.]244.14.7

47[.]244.218.224

47[.]245.12.138

47[.]245.31.124

47[.]52.161.9

47[.]56.151.214

47[.]56.169.92

47[.]56.253.186

47[.]57.186.166

47[.]75.42.43

47[.]75.55.181

47[.]75.86.225

47[.]91.221.115

47[.]91.242.27

47[.]92.155.231

47[.]92.219.198

47[.]92.239.244

47[.]92.255.176

47[.]93.116.160

47[.]93.12.191

47[.]93.229.0

47[.]94.102.248

47[.]94.136.27

47[.]94.14.145

47[.]94.154.108

47[.]94.228.41

47[.]94.96.209

47[.]95.115.1

47[.]95.119.10

47[.]95.194.251

47[.]95.205.52

47[.]97.98.237

47[.]98.131.192

47[.]98.156.92

47[.]98.162.206

47[.]98.166.253

47[.]98.239.204

47[.]98.244.206

47[.]98.247.45

47[.]99.48.241

47[.]99.72.130

49[.]232.20.75

49[.]232.239.196

49[.]232.27.213

49[.]232.39.67

49[.]233.132.10

49[.]233.137.7

49[.]233.155.141

49[.]233.73.185

49[.]233.78.149

49[.]233.85.7

49[.]233.89.89

49[.]234.105.212

49[.]234.155.24

49[.]234.239.23

49[.]234.5.74

49[.]234.64.118

49[.]234.93.171

49[.]234.94.85

49[.]235.119.2

49[.]235.144.34

49[.]235.158.131

49[.]235.166.224

49[.]235.199.136

49[.]235.200.123

49[.]235.204.16

49[.]235.212.74

49[.]235.217.243

49[.]235.22.75

49[.]235.223.77

49[.]235.23.207

49[.]235.23.236

49[.]235.244.235

49[.]235.40.131

49[.]235.42.77

49[.]235.50.54

49[.]235.60.144

49[.]235.90.230

50[.]112.70.12

51[.]15.136.48

51[.]210.87.117

51[.]83.200.186

51[.]91.79.126

52[.]14.171.234

52[.]14.65.166

52[.]147.4.139

52[.]166.232.140

52[.]175.218.135

52[.]22.35.45

52[.]229.22.93

52[.]87.210.1

52[.]90.135.23

52[.]91.46.68

52[.]91.75.52

54[.]153.242.99

54[.]169.240.239

54[.]172.42.32

54[.]174.145.85

54[.]175.230.166

54[.]201.107.45

54[.]206.20.207

54[.]212.69.111

54[.]213.249.7

54[.]214.197.200

54[.]246.146.207

54[.]252.206.69

54[.]252.210.126

54[.]253.108.178

54[.]253.244.200

54[.]80.166.26

60[.]163.129.202

60[.]205.3.82

61[.]141.222.100

62[.]113.117.167

63[.]142.243.214

63[.]34.87.167

64[.]128.143.70

64[.]225.114.141

64[.]227.121.168

64[.]227.6.38

64[.]44.133.156

65[.]49.133.221

65[.]49.135.123

65[.]49.224.215

66[.]152.191.41

66[.]42.62.80

69[.]30.206.250

69[.]30.232.138

69[.]30.232.139

69[.]30.232.140

69[.]30.232.141

69[.]30.232.142

74[.]118.138.159

78[.]128.114.113

78[.]129.165.207

78[.]142.18.157

78[.]142.194.114

78[.]94.208.254

79[.]141.162.41

81[.]70.19.111

81[.]70.30.97

83[.]164.140.60

85[.]92.108.85

85[.]93.20.114

88[.]214.26.29

89[.]45.4.135

91[.]121.76.158

91[.]208.184.81

91[.]241.19.10

92[.]223.105.130

92[.]42.14.133

93[.]115.23.169

94[.]100.18.43

94[.]156.189.168

94[.]232.40.176

94[.]232.43.237

95[.]141.41.18

95[.]142.40.121

95[.]179.134.194

95[.]179.201.34

95[.]179.228.227

95[.]179.236.54

99[.]79.101.225

99[.]81.122.12

100[.]24.234.117

100[.]24.56.227

100[.]25.151.21

101[.]132.116.202

101[.]132.236.129

101[.]132.33.79

101[.]133.137.195

101[.]200.147.217

101[.]200.164.199

101[.]200.53.21

101[.]200.55.39

101[.]200.87.178

101[.]201.121.13

101[.]201.65.35

101[.]32.29.242

101[.]37.24.50

101[.]37.76.212

103[.]147.12.5

103[.]150.8.146

103[.]193.4.11

103[.]209.102.241

103[.]214.165.213

103[.]224.82.171

103[.]238.224.138

103[.]242.134.79

103[.]254.75.240

103[.]255.179.187

103[.]39.108.20

103[.]45.116.10

103[.]45.129.67

103[.]45.173.221

103[.]56.53.100

103[.]68.251.31

103[.]73.161.42

103[.]78.243.197

103[.]78.243.198

103[.]78.243.199

103[.]94.180.33

103[.]97.124.50

104[.]128.93.229

104[.]149.168.199

104[.]154.248.179

104[.]160.41.224

104[.]168.159.36

104[.]168.172.252

104[.]168.174.197

104[.]168.175.192

104[.]168.176.29

104[.]168.214.104

104[.]192.169.78

104[.]194.10.206

104[.]198.151.234

104[.]225.239.196

104[.]237.4.40

104[.]238.134.63

104[.]244.156.156

104[.]251.217.97

106[.]12.90.123

106[.]13.174.69

106[.]13.182.116

106[.]13.33.86

106[.]13.42.155

106[.]13.48.213

106[.]13.8.47

106[.]13.85.189

106[.]14.0.74

106[.]14.189.174

106[.]14.82.209

106[.]15.202.7

106[.]15.249.108

106[.]2.13.25

106[.]52.214.81

106[.]52.235.216

106[.]52.55.45

106[.]53.116.113

106[.]53.226.165

106[.]53.231.16

106[.]53.241.3

106[.]53.243.154

106[.]53.59.24

106[.]53.74.243

106[.]53.97.24

106[.]54.177.4

106[.]54.211.200

106[.]54.241.235

106[.]54.84.65

106[.]54.96.164

106[.]55.153.204

107[.]148.241.235

107[.]148.247.198

107[.]161.188.203

107[.]182.24.70

108[.]177.235.22

108[.]61.162.223

108[.]61.200.55

108[.]61.201.65

109[.]235.70.99

111[.]229.107.34

111[.]229.35.56

111[.]229.51.128

111[.]229.58.217

111[.]230.197.23

111[.]231.228.112

111[.]231.240.158

111[.]231.79.105

111[.]90.149.188

112[.]124.20.162

112[.]126.89.177

112[.]74.33.227

113[.]31.118.7

114[.]116.225.193

114[.]116.41.86

114[.]118.4.213

114[.]215.86.71

114[.]55.106.242

114[.]55.25.227

114[.]55.33.36

116[.]204.170.146

116[.]62.100.78

116[.]62.104.16

116[.]62.174.32

116[.]62.200.143

116[.]85.69.130

117[.]50.80.107

117[.]51.136.34

117[.]51.142.47

117[.]51.150.222

118[.]126.100.187

118[.]178.94.47

118[.]184.23.74

118[.]24.108.239

118[.]24.136.75

118[.]24.170.186

118[.]24.28.219

118[.]24.85.85

118[.]24.9.34

118[.]25.138.119

118[.]25.157.90

118[.]25.71.232

118[.]89.95.126

119[.]23.237.214

119[.]23.241.16

119[.]23.42.235

119[.]23.79.133

119[.]28.194.152

119[.]29.116.14

119[.]29.119.60

119[.]29.132.198

119[.]29.188.218

119[.]3.124.44

119[.]3.140.246

119[.]3.187.188

119[.]3.86.69

119[.]45.136.244

119[.]45.191.253

119[.]45.5.195

119[.]45.56.199

120[.]131.3.43

120[.]132.81.138

120[.]132.81.145

120[.]24.64.98

120[.]25.167.81

120[.]26.160.136

120[.]26.162.133

120[.]26.177.10

120[.]27.17.232

120[.]27.245.125

120[.]27.3.39

120[.]55.194.145

120[.]76.119.147

120[.]77.180.97

120[.]78.176.65

120[.]78.196.37

120[.]79.142.88

120[.]79.210.67

120[.]79.237.135

120[.]79.24.186

120[.]79.28.147

120[.]79.38.19

120[.]92.173.127

121[.]127.234.11

121[.]196.177.46

121[.]196.193.160

121[.]196.27.187

121[.]199.16.25

121[.]36.107.213

121[.]36.12.130

121[.]36.140.230

121[.]36.146.237

121[.]36.149.225

121[.]36.155.174

121[.]36.162.110

121[.]36.175.175

121[.]36.196.31

121[.]36.211.148

121[.]36.215.68

121[.]36.252.20

121[.]36.32.125

121[.]36.37.7

121[.]37.23.161

121[.]40.103.231

121[.]40.124.244

121[.]41.229.1

121[.]41.82.60

121[.]46.4.136

122[.]114.195.209

122[.]51.131.86

122[.]51.137.157

122[.]51.16.84

122[.]51.250.26

122[.]51.253.174

122[.]51.33.2

123[.]206.21.178

123[.]206.210.153

123[.]206.221.27

123[.]206.232.40

123[.]206.47.78

123[.]207.14.227

123[.]56.116.146

123[.]56.228.208

123[.]56.27.243

123[.]56.9.63

123[.]57.143.225

123[.]57.17.24

123[.]57.209.41

123[.]57.241.243

124[.]156.120.11

124[.]156.196.145

124[.]217.230.137

124[.]243.240.42

124[.]70.135.155

124[.]70.151.66

124[.]70.200.2

129[.]204.169.102

129[.]204.207.114

129[.]204.228.7

129[.]204.248.145

129[.]204.89.21

129[.]28.196.47

129[.]28.203.182

132[.]232.3.136

132[.]232.33.160

132[.]232.75.164

134[.]175.132.40

134[.]175.15.58

134[.]175.183.74

134[.]209.130.219

135[.]181.1.70

135[.]181.49.38

135[.]181.49.39

136[.]243.44.50

138[.]128.208.123

138[.]91.90.6

138[.]99.216.18

139[.]129.231.62

139[.]155.18.71

139[.]155.23.11

139[.]155.34.217

139[.]155.69.206

139[.]180.186.130

139[.]180.199.171

139[.]186.10.157

139[.]186.30.246

139[.]196.21.224

139[.]196.37.219

139[.]196.91.13

139[.]198.15.159

139[.]199.100.94

139[.]199.31.223

139[.]217.99.29

139[.]224.31.47

139[.]9.115.85

139[.]9.121.229

139[.]9.128.123

140[.]143.125.186

140[.]82.16.24

140[.]82.19.10

140[.]82.19.26

141[.]164.41.118

141[.]164.48.79

141[.]164.57.174

141[.]164.61.249

141[.]164.63.233

142[.]202.205.57

142[.]202.205.88

143[.]92.49.158

143[.]92.49.159

143[.]92.49.160

144[.]168.63.17

144[.]202.13.108

144[.]202.56.193

144[.]217.207.19

144[.]217.207.21

144[.]217.207.31

144[.]34.144.21

144[.]34.175.58

144[.]34.194.159

144[.]34.198.241

144[.]48.10.16

145[.]249.106.56

145[.]249.107.135

149[.]129.48.48

149[.]129.68.79

149[.]129.72.37

149[.]129.92.203

149[.]248.37.167

149[.]28.117.151

149[.]28.147.25

149[.]28.148.224

149[.]28.28.87

149[.]28.88.208

149[.]6.167.60

150[.]109.103.16

150[.]109.111.208

150[.]109.125.111

152[.]136.114.253

154[.]209.69.6

154[.]210.12.80

154[.]220.3.125

154[.]220.3.196

154[.]220.3.226

154[.]223.142.56

154[.]223.149.97

154[.]223.160.112

154[.]8.160.196

154[.]92.14.41

155[.]138.138.215

155[.]138.164.216

155[.]94.143.110

155[.]94.174.114

156[.]232.254.19

156[.]232.254.6

156[.]234.168.104

156[.]236.118.226

156[.]239.157.66

156[.]245.17.6

156[.]253.11.144

156[.]255.2.36

156[.]96.59.27

157[.]245.169.236

157[.]52.168.140

158[.]101.144.105

161[.]129.39.103

161[.]129.65.118

161[.]35.114.210

161[.]35.38.97

162[.]254.204.222

163[.]172.39.102

167[.]172.45.244

167[.]179.72.102

167[.]179.75.10

167[.]179.78.159

167[.]179.89.117

167[.]71.60.61

170[.]130.55.21

170[.]130.55.22

172[.]105.57.166

172[.]241.27.141

172[.]241.27.174

172[.]241.27.192

172[.]241.27.204

172[.]241.27.34

172[.]241.27.44

172[.]241.27.66

172[.]241.29.153

172[.]241.29.155

172[.]241.29.156

172[.]247.123.118

172[.]81.239.64

172[.]81.254.151

172[.]86.75.123

173[.]208.133.38

173[.]232.146.232

173[.]232.146.32

173[.]232.146.37

173[.]82.236.130

173[.]82.26.59

175[.]24.133.73

175[.]24.46.93

175[.]24.48.117

175[.]24.62.158

175[.]24.75.220

175[.]99.82.225

176[.]119.29.43

176[.]119.29.71

176[.]121.14.183

176[.]121.14.199

176[.]121.14.208

176[.]121.14.237

176[.]223.165.110

176[.]31.193.24

176[.]9.193.5

178[.]17.171.58

179[.]43.176.202

180[.]215.228.28

180[.]215.228.34

180[.]215.228.36

180[.]215.228.38

180[.]76.60.140

180[.]97.215.181

182[.]16.4.114

182[.]16.4.115

182[.]16.4.116

182[.]16.4.117

182[.]16.4.118

182[.]254.173.239

182[.]254.202.89

182[.]92.115.109

182[.]92.120.156

182[.]92.233.56

182[.]92.4.23

182[.]92.65.134

182[.]92.66.81

182[.]92.86.170

185[.]118.164.229

185[.]14.30.139

185[.]147.14.248

185[.]153.196.207

185[.]153.196.209

185[.]153.196.212

185[.]153.196.215

185[.]153.196.216

185[.]153.198.27

185[.]153.198.31

185[.]153.198.40

185[.]153.198.45

185[.]153.198.54

185[.]158.114.53

185[.]161.208.201

185[.]162.235.111

185[.]162.235.178

185[.]162.235.233

185[.]162.235.35

185[.]162.235.76

185[.]162.235.91

185[.]174.103.157

185[.]177.59.70

185[.]180.198.61

185[.]202.0.111

185[.]202.2.182

185[.]207.152.86

185[.]207.154.21

185[.]213.26.197

185[.]227.82.66

185[.]23.200.165

185[.]232.52.137

185[.]234.52.45

185[.]243.113.141

185[.]243.113.192

185[.]243.242.116

185[.]243.41.224

185[.]33.84.190

185[.]33.86.54

185[.]45.193.7

185[.]70.184.44

185[.]80.220.171

188[.]116.36.76

188[.]65.74.60

192[.]169.6.180

192[.]169.6.42

192[.]169.7.160

192[.]169.7.223

192[.]184.90.209

192[.]236.155.238

192[.]236.161.221

192[.]236.161.222

192[.]236.232.228

192[.]34.109.12

192[.]52.167.102

192[.]69.91.119

193[.]112.10.125

193[.]112.124.26

193[.]168.147.249

193[.]187.119.133

193[.]27.14.215

193[.]29.13.168

193[.]32.161.135

193[.]32.163.21

194[.]36.188.188

194[.]36.191.118

195[.]123.213.235

195[.]123.214.182

195[.]123.217.36

195[.]54.160.115

195[.]54.167.235

195[.]54.167.237

195[.]88.209.87

198[.]13.55.13

198[.]44.250.175

198[.]46.198.130

199[.]189.108.68

199[.]192.17.125

199[.]192.17.18

199[.]233.237.115

202[.]182.105.129

202[.]182.119.224

202[.]61.87.136

203[.]195.158.21

203[.]195.199.146

204[.]16.247.89

204[.]44.83.217

207[.]148.124.20

207[.]148.127.216

207[.]148.65.247

207[.]219.199.120

207[.]46.130.130

208[.]51.62.26

208[.]51.62.27

208[.]51.62.28

208[.]51.62.29

208[.]51.62.30

209[.]126.119.186

210[.]16.120.248

211[.]159.201.49

211[.]49.225.208

212[.]129.150.253

212[.]64.44.176

213[.]217.0.216

216[.]126.231.24

216[.]24.188.130

216[.]240.134.70

216[.]250.111.90

217[.]12.202.89

217[.]12.208.162

217[.]12.208.227

217[.]12.208.251

217[.]12.218.99

218[.]253.251.100

218[.]253.251.74

219[.]146.156.17

221[.]181.173.48

221[.]237.189.200

222[.]186.39.123

223[.]68.10.24

参考:

https://www.cnblogs.com/websecyw/p/12058948.html

https://bbs.pediy.com/thread-249837.htm

https://research.nccgroup.com/2020/06/15/striking-back-at-retired-cobalt-strike-a-look-at-a-legacy-vulnerability/

https://www.nccgroup.com/us/about-us/newsroom-and-events/blog/2019/february/identifying-cobalt-strike-team-servers-in-the-wild/

https://www.cobaltstrike.com/help-malleable-c2

https://github.com/salesforce/ja3

https://xz.aliyun.com/t/3889

https://engineering.salesforce.com/tls-fingerprinting-with-ja3-and-ja3s-247362855967

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