Exploit for XWorm Trojan 2.1 NULL Pointer Dereference

Name: Exploit for XWorm Trojan 2.1 NULL Pointer Dereference
Rating: 5 (124 reviews)
2023-02-14 | CVSS 1.1
## https://sploitus.com/exploit?id=PACKETSTORM:170981
# Exploit Author: TOUHAMI KASBAOUI  
# Vendor Homepage: https://blog.cyble.com/2022/08/19/evilcoder-project-selling-multiple-dangerous-tools-online/  
# Software Link: N/A# Version: 2.1# Tested on: Windows 10  
# CVE : N/A  
  
==================================================================  
THE BUG : NULL pointer dereference -> DOS crash  
==================================================================  
The sophisticated XWorm Trojan is well exploited by EvilCoder, where they collect different features such as ransomware and keylogger TAs to make it more risky for victims. The Trojan assigned to victims suffers from a NULL pointer deference vulnerability, which could lead to a denial of service for the server builder of the threat actor by getting his IP address and port of command and control.  
==================================================================  
WINDBG ANALYSIS AFTER SENDING 1000 'A' BYTES  
==================================================================  
(160.b98): Access violation - code c0000005 (first chance)  
First chance exceptions are reported before any exception handling.  
This exception may be expected and handled.  
eax=0330c234 ebx=0113e8d4 ecx=00000000 edx=018c0000 esi=0330c234 edi=0113e55c  
eip=078f5a59 esp=0113e4f8 ebp=0113e568 iopl=0 nv up ei pl zr na pe nc  
cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010246  
builder!XWorm.Client.isDisconnected+0xa9:  
078f5a59 8b01 mov eax,dword ptr [ecx] ds:002b:00000000=????????  
*******************************************************************************  
* *  
* Exception Analysis *  
* *  
*******************************************************************************  
  
MethodDesc: 055a86b4  
Method Name: XWorm.Client.isDisconnected()  
Class: 09fe9634  
MethodTable: 055a86d8  
mdToken: 06000730  
Module: 01464044  
IsJitted: yes  
CodeAddr: 078f59b0  
Transparency: Critical  
MethodDesc: 055a86b4  
Method Name: XWorm.Client.isDisconnected()  
Class: 09fe9634  
MethodTable: 055a86d8  
mdToken: 06000730  
Module: 01464044  
IsJitted: yes  
CodeAddr: 078f59b0  
Transparency: Critical  
Failed to request MethodData, not in JIT code range  
  
KEY_VALUES_STRING: 1  
  
Key : AV.Dereference  
Value: NullPtr  
  
Key : AV.Fault  
Value: Read  
  
Key : Analysis.CPU.mSec  
Value: 6406  
  
Key : Analysis.DebugAnalysisManager  
Value: Create  
  
Key : Analysis.Elapsed.mSec  
Value: 12344  
  
Key : Analysis.IO.Other.Mb  
Value: 152  
  
Key : Analysis.IO.Read.Mb  
Value: 3  
  
Key : Analysis.IO.Write.Mb  
Value: 181  
  
Key : Analysis.Init.CPU.mSec  
Value: 48905  
  
Key : Analysis.Init.Elapsed.mSec  
Value: 6346579  
  
Key : Analysis.Memory.CommitPeak.Mb  
Value: 200  
  
Key : CLR.BuiltBy  
Value: NET48REL1LAST_C  
  
Key : CLR.Engine  
Value: CLR  
  
Key : CLR.Version  
Value: 4.8.4515.0  
  
Key : Timeline.OS.Boot.DeltaSec  
Value: 7496  
  
Key : Timeline.Process.Start.DeltaSec  
Value: 6371  
  
Key : WER.OS.Branch  
Value: vb_release  
  
Key : WER.OS.Timestamp  
Value: 2019-12-06T14:06:00Z  
  
Key : WER.OS.Version  
Value: 10.0.19041.1  
  
Key : WER.Process.Version  
Value: 2.1.0.0  
  
  
NTGLOBALFLAG: 0  
  
PROCESS_BAM_CURRENT_THROTTLED: 0  
  
PROCESS_BAM_PREVIOUS_THROTTLED: 0  
  
APPLICATION_VERIFIER_FLAGS: 0  
  
EXCEPTION_RECORD: (.exr -1)  
ExceptionAddress: 078f5a59 (builder!XWorm.Client.isDisconnected+0x000000a9)  
ExceptionCode: c0000005 (Access violation)  
ExceptionFlags: 00000000  
NumberParameters: 2  
Parameter[0]: 00000000  
Parameter[1]: 00000000  
Attempt to read from address 00000000  
  
FAULTING_THREAD: 00000b98  
  
PROCESS_NAME: builder.exe  
  
READ_ADDRESS: 00000000   
  
ERROR_CODE: (NTSTATUS) 0xc0000005 - The instruction at 0x%p referenced memory at 0x%p. The memory could not be %s.  
  
EXCEPTION_CODE_STR: c0000005  
  
EXCEPTION_PARAMETER1: 00000000  
  
EXCEPTION_PARAMETER2: 00000000  
  
IP_ON_HEAP: 078f5a59  
The fault address in not in any loaded module, please check your build's rebase  
log at <releasedir>\bin\build_logs\timebuild\ntrebase.log for module which may  
contain the address if it were loaded.  
  
STACK_TEXT:   
0113e568 73140556 00000000 00000000 00000000 builder!XWorm.Client.isDisconnected+0xa9  
0113e574 7314373a 0113e8d4 0113e5b8 732dd3f0 clr!CallDescrWorkerInternal+0x34  
0113e5c8 7321f0d1 c887551e 00000000 0335b7dc clr!CallDescrWorkerWithHandler+0x6b  
0113e608 7321f1d6 731d7104 0335b7dc 055ab280 clr!CallDescrWorkerReflectionWrapper+0x55  
0113e90c 7212853c 00000000 0330a1dc 00000000 clr!RuntimeMethodHandle::InvokeMethod+0x838  
0113e930 72114a9d 00000000 00000000 00000000 mscorlib_ni!  
0113e94c 6e14bf55 00000000 00000000 00000000 mscorlib_ni!  
0113e968 6e14be68 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113e990 72118604 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113e9f4 72118537 00000000 00000000 00000000 mscorlib_ni!  
0113ea08 721184f4 00000000 00000000 00000000 mscorlib_ni!  
0113ea24 6e14bdfa 00000000 00000000 00000000 mscorlib_ni!  
0113ea40 6e14bb9a 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113ea80 6e13b07f 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113eacc 6e144931 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113ead8 6e1445f7 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113eaec 6e13af53 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113eaf4 6e13aee5 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113eb08 6e13a820 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113eb58 0146d08e 00000000 00000000 00000000 System_Windows_Forms_ni!  
WARNING: Frame IP not in any known module. Following frames may be wrong.  
0113eb8c 7650148b 000606f4 0000c250 00000000 0x146d08e  
0113ebb8 764f844a 05823e56 000606f4 0000c250 USER32!_InternalCallWinProc+0x2b  
0113ec9c 764f61ba 05823e56 00000000 0000c250 USER32!UserCallWinProcCheckWow+0x33a  
0113ed10 764f5f80 0113ed98 0113ed58 6e19e5ed USER32!DispatchMessageWorker+0x22a  
0113ed1c 6e19e5ed 0113ed98 c9b28348 731410fc USER32!DispatchMessageW+0x10  
0113ed58 6e14b44f 00000000 00000000 00000000 System_Windows_Forms_ni+0x22e5ed  
0113eddc 6e14b03d 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113ee30 6e14ae93 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113ee5c 014b2694 00000000 00000000 00000000 System_Windows_Forms_ni!  
0113ee84 014b2211 00000000 00000000 00000000 0x14b2694  
0113eeac 014b1871 00000000 00000000 00000000 0x14b2211  
0113eef8 014b08b7 00000000 00000000 00000000 0x14b1871  
0113ef28 73140556 00000000 00000000 00000000 builder!XWorm.My.MyApplication.Main+0x6f  
0113ef34 7314373a 0113efc4 0113ef78 732dd3f0 clr!CallDescrWorkerInternal+0x34  
0113ef88 73149adb 00000000 030622ec 73171e90 clr!CallDescrWorkerWithHandler+0x6b  
0113eff0 732bff7b 0113f0cc c8874202 01466f94 clr!MethodDescCallSite::CallTargetWorker+0x16a  
0113f114 732c065a 0113f158 00000000 c8874096 clr!RunMain+0x1b3  
0113f380 732c0587 00000000 c8874b72 00700000 clr!Assembly::ExecuteMainMethod+0xf7  
0113f864 732c0708 c8874baa 00000000 00000000 clr!SystemDomain::ExecuteMainMethod+0x5ef  
0113f8bc 732c082e c8874bea 00000000 732bc210 clr!ExecuteEXE+0x4c  
0113f8fc 732bc235 c8874a2e 00000000 732bc210 clr!_CorExeMainInternal+0xdc  
0113f938 7398fa84 84112dff 73a24330 7398fa20 clr!_CorExeMain+0x4d  
0113f970 73a1e81e 73a24330 73980000 0113f998 mscoreei!_CorExeMain+0xd6  
0113f980 73a24338 73a24330 76b600f9 00f94000 MSCOREE!ShellShim__CorExeMain+0x9e  
0113f998 76b600f9 00f94000 76b600e0 0113f9f4 MSCOREE!_CorExeMain_Exported+0x8  
0113f998 77997bbe 00f94000 3d39c64a 00000000 KERNEL32!BaseThreadInitThunk+0x19  
0113f9f4 77997b8e ffffffff 779b8d3f 00000000 ntdll!__RtlUserThreadStart+0x2f  
0113fa04 00000000 00000000 00000000 00000000 ntdll!_RtlUserThreadStart+0x1b  
  
  
STACK_COMMAND: ~0s ; .cxr ; kb  
  
SYMBOL_NAME: builder!XWorm.Client.isDisconnected+a9  
  
MODULE_NAME: builder  
  
IMAGE_NAME: builder.exe  
  
FAILURE_BUCKET_ID: NULL_POINTER_READ_c0000005_builder.exe!XWorm.Client.isDisconnected  
  
OS_VERSION: 10.0.19041.1  
  
BUILDLAB_STR: vb_release  
  
OSPLATFORM_TYPE: x86  
  
OSNAME: Windows 10  
  
IMAGE_VERSION: 2.1.0.0  
  
FAILURE_ID_HASH: {ab0d02c5-881b-c628-2858-a241c5c41b1f}  
  
Followup: MachineOwner  
---------  
  
TS: Exploitable - Data from Faulting Address controls Code Flow starting at builder!XWorm.Client.isDisconnected+0x00000000000000a9 (Hash=0xc8c3bc2d.0x7badd95a)