xworm | 6044f92bdc0a3b4bc81146ab4df57428a0e106777131b8ffca1ee9f1a8d2962e

Analysis

max time kernel
150s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20250217-en
resource tags

arch:x64arch:x86image:win10v2004-20250217-enlocale:en-usos:windows10-2004-x64system
submitted
01/03/2025, 14:38

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General

Target

Xeno.exe
Size

60KB
MD5

5f83231a9defe33363c22c05cb083d4c
SHA1

13cfab281b4d730a591f81adc0ae6c237675a65b
SHA256

6044f92bdc0a3b4bc81146ab4df57428a0e106777131b8ffca1ee9f1a8d2962e
SHA512

fdc814b0154dc517c14082ca9f658f8c490d09a08171eb6425e9394e01195b8474e229731811ad313ddabe020aa41a8778c705159b31d93b7e646b1f7942b959
SSDEEP

1536:nFFgs2DJZRprX9iLX7al8Gq+bMIRWIEqcN6tOfVg8TB:n3h48Xp+bMfqOfVpTB

Score

10^/10

xworm bootkit defense_evasion discovery execution persistence rat trojan upx

Malware Config

Extracted

Family

xworm

cause-indexes.gl.at.ply.gg:17210

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Contains code to disable Windows Defender 1 IoCs

A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

resource	yara_rule
behavioral2/memory/4600-59-0x0000000002940000-0x000000000294E000-memory.dmp	disable_win_def

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral2/memory/4600-1-0x0000000000820000-0x0000000000834000-memory.dmp	family_xworm

UAC bypass 3 TTPs 1 IoCs

defense_evasion trojan

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	tktulf.exe

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
2788	powershell.exe
744	powershell.exe
3240	powershell.exe
4636	powershell.exe

Event Triggered Execution: Image File Execution Options Injection 1 TTPs 4 IoCs

persistence

Image File Execution Options Injection

T1546.012

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe	tktulf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\explorer.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tktulf.exe"	tktulf.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe	tktulf.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe\Debugger = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tktulf.exe"	tktulf.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-1161330783-2912525651-1278508834-1000\Control Panel\International\Geo\Nation	Xeno.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 2 IoCs

pid	Process
4844	tktulf.exe
4624	tktulf.exe

Adds Run key to start application 2 TTPs 2 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-1161330783-2912525651-1278508834-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	Xeno.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce\Java = "C:\\Users\\Admin\\AppData\\Local\\Temp\\tktulf.exe"	tktulf.exe

Checks whether UAC is enabled 1 TTPs 1 IoCs

defense_evasion trojan

System Information Discovery

T1082

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	tktulf.exe

Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

Bootkits write to the MBR to gain persistence at a level below the operating system.

bootkit persistence

Bootkit

T1542.003

description	ioc	Process
File opened for modification	\??\PhysicalDrive0	tktulf.exe

UPX packed file 12 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000a000000023d48-65.dat	upx
behavioral2/memory/4844-68-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4624-72-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4624-73-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4844-90-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4844-93-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4844-114-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4844-135-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4844-158-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4844-179-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4844-200-0x0000000000400000-0x00000000006D8000-memory.dmp	upx
behavioral2/memory/4844-221-0x0000000000400000-0x00000000006D8000-memory.dmp	upx

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tktulf.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	tktulf.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
2788	powershell.exe
2788	powershell.exe
744	powershell.exe
744	powershell.exe
3240	powershell.exe
3240	powershell.exe
4636	powershell.exe
4636	powershell.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4600	Xeno.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe
4844	tktulf.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
4844	tktulf.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4600	Xeno.exe
Token: SeDebugPrivilege	2788	powershell.exe
Token: SeDebugPrivilege	744	powershell.exe
Token: SeDebugPrivilege	3240	powershell.exe
Token: SeDebugPrivilege	4636	powershell.exe
Token: SeDebugPrivilege	4600	Xeno.exe
Token: SeBackupPrivilege	4844	tktulf.exe
Token: SeRestorePrivilege	4844	tktulf.exe

Suspicious use of SetWindowsHookEx 3 IoCs

pid	Process
4600	Xeno.exe
4844	tktulf.exe
4624	tktulf.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 4600 wrote to memory of 2788	4600	Xeno.exe	91
PID 4600 wrote to memory of 2788	4600	Xeno.exe	91
PID 4600 wrote to memory of 744	4600	Xeno.exe	94
PID 4600 wrote to memory of 744	4600	Xeno.exe	94
PID 4600 wrote to memory of 3240	4600	Xeno.exe	97
PID 4600 wrote to memory of 3240	4600	Xeno.exe	97
PID 4600 wrote to memory of 4636	4600	Xeno.exe	99
PID 4600 wrote to memory of 4636	4600	Xeno.exe	99
PID 4600 wrote to memory of 4844	4600	Xeno.exe	113
PID 4600 wrote to memory of 4844	4600	Xeno.exe	113
PID 4600 wrote to memory of 4844	4600	Xeno.exe	113

System policy modification 1 TTPs 3 IoCs

defense_evasion

Modify Registry

T1112

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System	tktulf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	tktulf.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\HideFastUserSwitching = "1"	tktulf.exe

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\Xeno.exe
"C:\Users\Admin\AppData\Local\Temp\Xeno.exe"
1⤵
- Checks computer location settings
- 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:4600
- 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\Xeno.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2788
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Xeno.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:744
- 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:3240
- 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:4636
- C:\Users\Admin\AppData\Local\Temp\tktulf.exe
  "C:\Users\Admin\AppData\Local\Temp\tktulf.exe"
  2⤵
  - UAC bypass
  - Event Triggered Execution: Image File Execution Options Injection
  - Executes dropped EXE
  - Adds Run key to start application
  - Checks whether UAC is enabled
  - Writes to the Master Boot Record (MBR)
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - System policy modification
  PID:4844

C:\Users\Admin\AppData\Local\Temp\tktulf.exe
C:\Users\Admin\AppData\Local\Temp\tktulf.exe explorer.exe
1⤵
- Executes dropped EXE
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
PID:4624

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Pre-OS Boot

T1542

Bootkit

T1542.003

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Event Triggered Execution

T1546

Image File Execution Options Injection

T1546.012

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

T1562

Disable or Modify Tools

T1562.001

Modify Registry

T1112

Pre-OS Boot

T1542

Bootkit

T1542.003

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
3737c3eb5510d74c3d6ea770e9ff4ffb

SHA1
88148610a4f00560b06bc8607794d85f15bf3b64

SHA256
b716e0860cc27dd1035a125f44833c5999f4a0429635df6d97634f041b25effa

SHA512
db4db804933ab50bf56130a939040e33a57e4ec056c9e0c598bcae86bbaf093e2a22fd4ec8801f6b029985170f17859a931e63f28a7abb4f91780da2a33e1ebc

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
ba169f4dcbbf147fe78ef0061a95e83b

SHA1
92a571a6eef49fff666e0f62a3545bcd1cdcda67

SHA256
5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1

SHA512
8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_gvrnnmv3.n1l.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Local\Temp\tktulf.exe

Filesize
1.7MB

MD5
6e628c5531010f1053fff090a7699659

SHA1
237e5b8870092dd0e9a3b0fb76da93fcfce56516

SHA256
52d65a486dd027d9d6e3ca10ea808815ff0fda4e5032695333b7c2d5a5f95e41

SHA512
53eb023d70038b2820a6c0ed0a453307f90b22279e521fa8af3b6ef240ce022300a1d05794bf02d52f472c5adeb87c814373c5e29b3f13102c0128af06d5f0e7

Download Submit
memory/2788-7-0x0000028C30790000-0x0000028C307B2000-memory.dmp

Filesize
136KB

Download
memory/2788-12-0x00007FFF6A4A0000-0x00007FFF6AF61000-memory.dmp

Filesize
10.8MB

Download
memory/2788-13-0x00007FFF6A4A0000-0x00007FFF6AF61000-memory.dmp

Filesize
10.8MB

Download
memory/2788-14-0x00007FFF6A4A0000-0x00007FFF6AF61000-memory.dmp

Filesize
10.8MB

Download
memory/2788-17-0x00007FFF6A4A0000-0x00007FFF6AF61000-memory.dmp

Filesize
10.8MB

Download
memory/4600-58-0x000000001C9D0000-0x000000001C9DC000-memory.dmp

Filesize
48KB

Download
memory/4600-140-0x000000001CF40000-0x000000001CF76000-memory.dmp

Filesize
216KB

Download
memory/4600-57-0x00007FFF6A4A0000-0x00007FFF6AF61000-memory.dmp

Filesize
10.8MB

Download
memory/4600-0-0x00007FFF6A4A3000-0x00007FFF6A4A5000-memory.dmp

Filesize
8KB

Download
memory/4600-59-0x0000000002940000-0x000000000294E000-memory.dmp

Filesize
56KB

Download
memory/4600-1-0x0000000000820000-0x0000000000834000-memory.dmp

Filesize
80KB

Download
memory/4600-155-0x000000001BA90000-0x000000001BA9C000-memory.dmp

Filesize
48KB

Download
memory/4600-56-0x00007FFF6A4A0000-0x00007FFF6AF61000-memory.dmp

Filesize
10.8MB

Download
memory/4624-73-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4624-72-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-90-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-93-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-114-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-135-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-68-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-158-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-179-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-200-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download
memory/4844-221-0x0000000000400000-0x00000000006D8000-memory.dmp

Filesize
2.8MB

Download