xworm | 5feb1e0d222f4739b4ad6734f4c817c683cebf5a9b3d9641827790a3f0fc3558

General

Target

XClient.exe
Size

70KB
MD5

45a868fd095bf97ba50c936b00ecc995
SHA1

1ffaa4e2781766ce742ac06edc7ec98524d036dc
SHA256

5feb1e0d222f4739b4ad6734f4c817c683cebf5a9b3d9641827790a3f0fc3558
SHA512

3375aacb66c8c161cf75b6bcd03cd6c336f9af022c3cf4cf371f40b88ccf28ce0200c42a72a72b3a7d0aebdbcc1dc78cded10b8e6669ab8d602152341fad7ffa
SSDEEP

1536:/67XKajAKywh1pW2+knubbST0e56ai6XOKfhe9Y32:/IwK/hLW2bubbSxUa7OKZe9G2

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

C2

0.tcp.eu.ngrok.io:11713

Attributes

Install_directory
%AppData%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/1964-1-0x0000000000D90000-0x0000000000DA8000-memory.dmp	family_xworm
behavioral1/files/0x00110000000054ab-28.dat	family_xworm

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

Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
2648	powershell.exe
2544	powershell.exe
1740	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.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-1-5-21-3452737119-3959686427-228443150-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

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

Web Service

T1102

flow	ioc
6	0.tcp.eu.ngrok.io

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
4	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

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

persistence

Scheduled Task/Job

T1053

pid	Process
1196	schtasks.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
2648	powershell.exe
2544	powershell.exe
1740	powershell.exe
1964	XClient.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	1964	XClient.exe
Token: SeDebugPrivilege	2648	powershell.exe
Token: SeDebugPrivilege	2544	powershell.exe
Token: SeDebugPrivilege	1740	powershell.exe
Token: SeDebugPrivilege	1964	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1964	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1964 wrote to memory of 2648	1964	XClient.exe	29
PID 1964 wrote to memory of 2648	1964	XClient.exe	29
PID 1964 wrote to memory of 2648	1964	XClient.exe	29
PID 1964 wrote to memory of 2544	1964	XClient.exe	31
PID 1964 wrote to memory of 2544	1964	XClient.exe	31
PID 1964 wrote to memory of 2544	1964	XClient.exe	31
PID 1964 wrote to memory of 1740	1964	XClient.exe	33
PID 1964 wrote to memory of 1740	1964	XClient.exe	33
PID 1964 wrote to memory of 1740	1964	XClient.exe	33
PID 1964 wrote to memory of 1196	1964	XClient.exe	35
PID 1964 wrote to memory of 1196	1964	XClient.exe	35
PID 1964 wrote to memory of 1196	1964	XClient.exe	35

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: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1964
- 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:2648
- 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:2544
- 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\Roaming\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1740
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:1196

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

Scheduled Task/Job

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

Scheduled Task/Job

Defense Evasion

Modify Registry

1

T1112

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
f14eb29987f153d8285bca31017134dc

SHA1
b767c8583a9e48316b21cf26cb80a72c160e7f1a

SHA256
b1c25dea25e5221e524235646599cc2c2cae616069b3cf1d3eeaafb7a4f5d509

SHA512
468c6017e10006f0a4f3d37f2b520a5cc1f98ab9f1a3d782194687c4a8cd06c0aaa58feb4c3250cc1dac26c861902a518e150154a65bec2570079aadd4fc9db2

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

Filesize
70KB

MD5
45a868fd095bf97ba50c936b00ecc995

SHA1
1ffaa4e2781766ce742ac06edc7ec98524d036dc

SHA256
5feb1e0d222f4739b4ad6734f4c817c683cebf5a9b3d9641827790a3f0fc3558

SHA512
3375aacb66c8c161cf75b6bcd03cd6c336f9af022c3cf4cf371f40b88ccf28ce0200c42a72a72b3a7d0aebdbcc1dc78cded10b8e6669ab8d602152341fad7ffa

Download Submit
memory/1964-0-0x000007FEF54F3000-0x000007FEF54F4000-memory.dmp

Filesize
4KB

Download
memory/1964-1-0x0000000000D90000-0x0000000000DA8000-memory.dmp

Filesize
96KB

Download
memory/1964-2-0x000007FEF54F0000-0x000007FEF5EDC000-memory.dmp

Filesize
9.9MB

Download
memory/1964-30-0x000007FEF54F3000-0x000007FEF54F4000-memory.dmp

Filesize
4KB

Download
memory/2544-15-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/2544-16-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download
memory/2648-7-0x0000000002BA0000-0x0000000002C20000-memory.dmp

Filesize
512KB

Download
memory/2648-8-0x000000001B540000-0x000000001B822000-memory.dmp

Filesize
2.9MB

Download
memory/2648-9-0x0000000001E80000-0x0000000001E88000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads