xworm | 2e92b87e711d2e0c6a6338405c88ee79409082f710f4de516e17c204a5d4e2ad

General

Target

NetworkVPN.exe
Size

73KB
MD5

13096ebd1c9bd3477a6980126c30335b
SHA1

dd1db44656edb5da37c71d3c6c2760cc93a54920
SHA256

2e92b87e711d2e0c6a6338405c88ee79409082f710f4de516e17c204a5d4e2ad
SHA512

a24cbc13c75f6472e9850b8669ab8d4fcef404111e36d85b7baa057b8ace9ab3c60a82c14346082278fe8e0fd7f2b2734202f5eb907e3542a2ddcdb4314d5366
SSDEEP

1536:K82GiTnkhZY3KAJbdlRUXuaEqVy7wIM6aBwOFaqR6WVM:K82D6AJb3RUfXmmBwOAqhM

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

time-austin.gl.at.ply.gg:48325

Attributes

Install_directory
%AppData%
install_file
Microsoft Network Realtime Inspection Service.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/2020-1-0x0000000000A80000-0x0000000000A98000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
2560	powershell.exe
1220	powershell.exe
2692	powershell.exe
2576	powershell.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Network Realtime Inspection Service.lnk	NetworkVPN.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Microsoft Network Realtime Inspection Service.lnk	NetworkVPN.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-1-5-21-2812790648-3157963462-487717889-1000\Software\Microsoft\Windows\CurrentVersion\Run\Microsoft Network Realtime Inspection Service = "C:\\Users\\Admin\\AppData\\Roaming\\Microsoft Network Realtime Inspection Service.exe"	NetworkVPN.exe

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

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
1300	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2692	powershell.exe
2576	powershell.exe
2560	powershell.exe
1220	powershell.exe
2020	NetworkVPN.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	2020	NetworkVPN.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	2576	powershell.exe
Token: SeDebugPrivilege	2560	powershell.exe
Token: SeDebugPrivilege	1220	powershell.exe
Token: SeDebugPrivilege	2020	NetworkVPN.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2020	NetworkVPN.exe

Suspicious use of WriteProcessMemory 15 IoCs

description	pid	Process	procid_target
PID 2020 wrote to memory of 2692	2020	NetworkVPN.exe	29
PID 2020 wrote to memory of 2692	2020	NetworkVPN.exe	29
PID 2020 wrote to memory of 2692	2020	NetworkVPN.exe	29
PID 2020 wrote to memory of 2576	2020	NetworkVPN.exe	31
PID 2020 wrote to memory of 2576	2020	NetworkVPN.exe	31
PID 2020 wrote to memory of 2576	2020	NetworkVPN.exe	31
PID 2020 wrote to memory of 2560	2020	NetworkVPN.exe	33
PID 2020 wrote to memory of 2560	2020	NetworkVPN.exe	33
PID 2020 wrote to memory of 2560	2020	NetworkVPN.exe	33
PID 2020 wrote to memory of 1220	2020	NetworkVPN.exe	35
PID 2020 wrote to memory of 1220	2020	NetworkVPN.exe	35
PID 2020 wrote to memory of 1220	2020	NetworkVPN.exe	35
PID 2020 wrote to memory of 1300	2020	NetworkVPN.exe	37
PID 2020 wrote to memory of 1300	2020	NetworkVPN.exe	37
PID 2020 wrote to memory of 1300	2020	NetworkVPN.exe	37

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\NetworkVPN.exe
"C:\Users\Admin\AppData\Local\Temp\NetworkVPN.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:2020
- 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\NetworkVPN.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2692
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'NetworkVPN.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2576
- 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\Microsoft Network Realtime Inspection Service.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2560
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Microsoft Network Realtime Inspection Service.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1220
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Microsoft Network Realtime Inspection Service" /tr "C:\Users\Admin\AppData\Roaming\Microsoft Network Realtime Inspection Service.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1300

C:\Windows\system32\taskeng.exe
taskeng.exe {016BE0E9-DFE0-493D-B266-D30F584275CF} S-1-5-21-2812790648-3157963462-487717889-1000:JAFTUVRJ\Admin:Interactive:[1]
1⤵
PID:2844

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

Filesize
7KB

MD5
c450130bfe5c70d93928e7ad8c6b00e1

SHA1
30e513d5bfc818fa042b021d033b69d545f2d705

SHA256
ecc6c47123ebf199c765e2f1b07da84eebfb0ba27bb87bed41956bfa972f4827

SHA512
4ec59a9df7d7a5f1f387190edffbe3b9c21df7b92303215fb9ad2c35881309f463eb6985dcf16a08fd2a8b4b9c5b5562b960f88f5c904b906d9a074ea973b92b

Download Submit
memory/2020-0-0x000007FEF5743000-0x000007FEF5744000-memory.dmp

Filesize
4KB

Download
memory/2020-1-0x0000000000A80000-0x0000000000A98000-memory.dmp

Filesize
96KB

Download
memory/2020-2-0x000007FEF5740000-0x000007FEF612C000-memory.dmp

Filesize
9.9MB

Download
memory/2020-31-0x000007FEF5743000-0x000007FEF5744000-memory.dmp

Filesize
4KB

Download
memory/2020-32-0x000007FEF5740000-0x000007FEF612C000-memory.dmp

Filesize
9.9MB

Download
memory/2020-33-0x0000000002260000-0x000000000226C000-memory.dmp

Filesize
48KB

Download
memory/2576-15-0x000000001B5E0000-0x000000001B8C2000-memory.dmp

Filesize
2.9MB

Download
memory/2576-16-0x0000000001CF0000-0x0000000001CF8000-memory.dmp

Filesize
32KB

Download
memory/2692-7-0x00000000028F0000-0x0000000002970000-memory.dmp

Filesize
512KB

Download
memory/2692-8-0x000000001B4E0000-0x000000001B7C2000-memory.dmp

Filesize
2.9MB

Download
memory/2692-9-0x0000000001D90000-0x0000000001D98000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads