xworm | 90315fd137f2160e8d11223200c03bc2488f906007a5511240b29e1773596827

General

Target

XClient.exe
Size

207KB
MD5

6871607d92969776391efd493707eedc
SHA1

4a081720e336df47324b3a6e214e0be28754c07a
SHA256

90315fd137f2160e8d11223200c03bc2488f906007a5511240b29e1773596827
SHA512

74e437d5c95fc8019e954b93d71f6f0fe9bd8dc843153c791336bdee6ab25ed1fd3d75efa90645a60fa44c9cb43bf3dac20358d29fdbcadf157ccb559d8a2b12
SSDEEP

1536:Ks12gfnC6iy/PuF99N0z6POCZ0wLU7uS+ENi9:nfJ2F99N06OC1LUXk9

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

thetest.selfhost.co:1339

Mutex

6fb9p9QDJ0BS5PDw

Attributes

Install_directory
%ProgramData%
install_file
DirectOutputService.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2152-1-0x0000000001040000-0x0000000001078000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
2260	powershell.exe
2136	powershell.exe
2228	powershell.exe
2120	powershell.exe

Deletes itself 1 IoCs

pid	Process
580	cmd.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Defender.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Windows Defender.lnk	XClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\Windows Defender = "C:\\ProgramData\\Windows Defender"	XClient.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
688	timeout.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1664	schtasks.exe

Suspicious behavior: AddClipboardFormatListener 1 IoCs

pid	Process
2152	XClient.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2260	powershell.exe
2136	powershell.exe
2228	powershell.exe
2120	powershell.exe
2152	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2152	XClient.exe
Token: SeDebugPrivilege	2260	powershell.exe
Token: SeDebugPrivilege	2136	powershell.exe
Token: SeDebugPrivilege	2228	powershell.exe
Token: SeDebugPrivilege	2120	powershell.exe
Token: SeDebugPrivilege	2152	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2152	XClient.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 2152 wrote to memory of 2260	2152	XClient.exe	30
PID 2152 wrote to memory of 2260	2152	XClient.exe	30
PID 2152 wrote to memory of 2260	2152	XClient.exe	30
PID 2152 wrote to memory of 2136	2152	XClient.exe	32
PID 2152 wrote to memory of 2136	2152	XClient.exe	32
PID 2152 wrote to memory of 2136	2152	XClient.exe	32
PID 2152 wrote to memory of 2228	2152	XClient.exe	34
PID 2152 wrote to memory of 2228	2152	XClient.exe	34
PID 2152 wrote to memory of 2228	2152	XClient.exe	34
PID 2152 wrote to memory of 2120	2152	XClient.exe	36
PID 2152 wrote to memory of 2120	2152	XClient.exe	36
PID 2152 wrote to memory of 2120	2152	XClient.exe	36
PID 2152 wrote to memory of 1664	2152	XClient.exe	38
PID 2152 wrote to memory of 1664	2152	XClient.exe	38
PID 2152 wrote to memory of 1664	2152	XClient.exe	38
PID 2152 wrote to memory of 2640	2152	XClient.exe	41
PID 2152 wrote to memory of 2640	2152	XClient.exe	41
PID 2152 wrote to memory of 2640	2152	XClient.exe	41
PID 2152 wrote to memory of 580	2152	XClient.exe	43
PID 2152 wrote to memory of 580	2152	XClient.exe	43
PID 2152 wrote to memory of 580	2152	XClient.exe	43
PID 580 wrote to memory of 688	580	cmd.exe	45
PID 580 wrote to memory of 688	580	cmd.exe	45
PID 580 wrote to memory of 688	580	cmd.exe	45

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: AddClipboardFormatListener
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2152
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2260
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2136
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\Windows Defender'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2228
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Windows Defender'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2120
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Windows Defender" /tr "C:\ProgramData\Windows Defender"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1664
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "Windows Defender"
  2⤵
  PID:2640
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpE87B.tmp.bat""
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:580
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:688

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\tmpE87B.tmp.bat

Filesize
159B

MD5
c30d96b61a4fbe1f5eeea76a2e24ac4e

SHA1
1c4f052754e7511a7975465bfce5de5286956bdc

SHA256
4596edf3b673d9fd5813d82bfeeec445954831d182d52c2497724cb7437b48c2

SHA512
cd41d97577e280c68399327108640983cf404036b9745546b67ef5240ce560a4d46488a6ae9eb5346625c00ad0370fb9a4e90be55530686256eb8235b43a3601

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
96576a34383be9134925ac3e228ca4de

SHA1
f3162ce0c79fc9509893c536af1a17c0b21d37d1

SHA256
04f9b70e3772894139cf1ae349a150b9c4ffb720bcf9cb66d3940ffddbd3d915

SHA512
87711502c3e0925bd7f24c77147a1b6a37efaed3c107d4625bd10de1510184db8e2a020f03d2f1cd2e32a9a709f9a21ab6a3eb4732c3a946fd22a15906cddac8

Download Submit
memory/2136-14-0x000000001B390000-0x000000001B672000-memory.dmp

Filesize
2.9MB

Download
memory/2136-15-0x0000000001E60000-0x0000000001E68000-memory.dmp

Filesize
32KB

Download
memory/2152-0-0x000007FEF6403000-0x000007FEF6404000-memory.dmp

Filesize
4KB

Download
memory/2152-1-0x0000000001040000-0x0000000001078000-memory.dmp

Filesize
224KB

Download
memory/2152-26-0x000007FEF6403000-0x000007FEF6404000-memory.dmp

Filesize
4KB

Download
memory/2152-30-0x000000001B3F0000-0x000000001B470000-memory.dmp

Filesize
512KB

Download
memory/2260-6-0x0000000002A00000-0x0000000002A80000-memory.dmp

Filesize
512KB

Download
memory/2260-7-0x000000001B260000-0x000000001B542000-memory.dmp

Filesize
2.9MB

Download
memory/2260-8-0x00000000023E0000-0x00000000023E8000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads