xworm | 48d74602d8e488f13359a7c54e4ff30e3e48d44190e57153539207b57a0f3ea4

Analysis

max time kernel
144s
max time network
155s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
17/11/2024, 04:44

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General

Target

XClient.exe
Size

58KB
MD5

0b664dbbbb3530b7f6bef9b1d61addb9
SHA1

9f5d5bd42ec1c44db3274396754db0c46ac169a5
SHA256

48d74602d8e488f13359a7c54e4ff30e3e48d44190e57153539207b57a0f3ea4
SHA512

6adff37cac5cc056f17c63b7cfefe6d7d4ab1da19ca3c5b59cbf22ead471e3c7416ff2b70eaf8be81af77dffabbd521aa563296eef6297e1e71bcbb42f9293cf
SSDEEP

1536:NELc8UB3jYNK6stQKEHSWcagrR4Zb/sordrmt69O0b0BQ5O:mLvUtYVTKEHSWcNR4Zb/JdO0b0BIO

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.1

147.185.221.22:4999

Attributes

Install_directory
%Public%
install_file
USB.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4480-1-0x00000000005B0000-0x00000000005C4000-memory.dmp	family_xworm
behavioral1/files/0x000a000000040cc7-50.dat	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 3 IoCs

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

execution

PowerShell

T1059.001

pid	Process
3056	powershell.exe
4472	powershell.exe
336	powershell.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-1-5-21-641261377-2215826147-608237349-1000\Control Panel\International\Geo\Nation	XClient.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

Executes dropped EXE 2 IoCs

pid	Process
1356	XClient.exe
3616	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-1-5-21-641261377-2215826147-608237349-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Public\\XClient.exe"	XClient.exe

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
1380	schtasks.exe

Suspicious behavior: EnumeratesProcesses 64 IoCs

pid	Process
3056	powershell.exe
3056	powershell.exe
4472	powershell.exe
4472	powershell.exe
336	powershell.exe
336	powershell.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe
4480	XClient.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4480	XClient.exe
Token: SeDebugPrivilege	3056	powershell.exe
Token: SeIncreaseQuotaPrivilege	3056	powershell.exe
Token: SeSecurityPrivilege	3056	powershell.exe
Token: SeTakeOwnershipPrivilege	3056	powershell.exe
Token: SeLoadDriverPrivilege	3056	powershell.exe
Token: SeSystemProfilePrivilege	3056	powershell.exe
Token: SeSystemtimePrivilege	3056	powershell.exe
Token: SeProfSingleProcessPrivilege	3056	powershell.exe
Token: SeIncBasePriorityPrivilege	3056	powershell.exe
Token: SeCreatePagefilePrivilege	3056	powershell.exe
Token: SeBackupPrivilege	3056	powershell.exe
Token: SeRestorePrivilege	3056	powershell.exe
Token: SeShutdownPrivilege	3056	powershell.exe
Token: SeDebugPrivilege	3056	powershell.exe
Token: SeSystemEnvironmentPrivilege	3056	powershell.exe
Token: SeRemoteShutdownPrivilege	3056	powershell.exe
Token: SeUndockPrivilege	3056	powershell.exe
Token: SeManageVolumePrivilege	3056	powershell.exe
Token: 33	3056	powershell.exe
Token: 34	3056	powershell.exe
Token: 35	3056	powershell.exe
Token: 36	3056	powershell.exe
Token: SeDebugPrivilege	4472	powershell.exe
Token: SeIncreaseQuotaPrivilege	4472	powershell.exe
Token: SeSecurityPrivilege	4472	powershell.exe
Token: SeTakeOwnershipPrivilege	4472	powershell.exe
Token: SeLoadDriverPrivilege	4472	powershell.exe
Token: SeSystemProfilePrivilege	4472	powershell.exe
Token: SeSystemtimePrivilege	4472	powershell.exe
Token: SeProfSingleProcessPrivilege	4472	powershell.exe
Token: SeIncBasePriorityPrivilege	4472	powershell.exe
Token: SeCreatePagefilePrivilege	4472	powershell.exe
Token: SeBackupPrivilege	4472	powershell.exe
Token: SeRestorePrivilege	4472	powershell.exe
Token: SeShutdownPrivilege	4472	powershell.exe
Token: SeDebugPrivilege	4472	powershell.exe
Token: SeSystemEnvironmentPrivilege	4472	powershell.exe
Token: SeRemoteShutdownPrivilege	4472	powershell.exe
Token: SeUndockPrivilege	4472	powershell.exe
Token: SeManageVolumePrivilege	4472	powershell.exe
Token: 33	4472	powershell.exe
Token: 34	4472	powershell.exe
Token: 35	4472	powershell.exe
Token: 36	4472	powershell.exe
Token: SeDebugPrivilege	336	powershell.exe
Token: SeIncreaseQuotaPrivilege	336	powershell.exe
Token: SeSecurityPrivilege	336	powershell.exe
Token: SeTakeOwnershipPrivilege	336	powershell.exe
Token: SeLoadDriverPrivilege	336	powershell.exe
Token: SeSystemProfilePrivilege	336	powershell.exe
Token: SeSystemtimePrivilege	336	powershell.exe
Token: SeProfSingleProcessPrivilege	336	powershell.exe
Token: SeIncBasePriorityPrivilege	336	powershell.exe
Token: SeCreatePagefilePrivilege	336	powershell.exe
Token: SeBackupPrivilege	336	powershell.exe
Token: SeRestorePrivilege	336	powershell.exe
Token: SeShutdownPrivilege	336	powershell.exe
Token: SeDebugPrivilege	336	powershell.exe
Token: SeSystemEnvironmentPrivilege	336	powershell.exe
Token: SeRemoteShutdownPrivilege	336	powershell.exe
Token: SeUndockPrivilege	336	powershell.exe
Token: SeManageVolumePrivilege	336	powershell.exe
Token: 33	336	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4480	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4480 wrote to memory of 3056	4480	XClient.exe	84
PID 4480 wrote to memory of 3056	4480	XClient.exe	84
PID 4480 wrote to memory of 4472	4480	XClient.exe	89
PID 4480 wrote to memory of 4472	4480	XClient.exe	89
PID 4480 wrote to memory of 336	4480	XClient.exe	92
PID 4480 wrote to memory of 336	4480	XClient.exe	92
PID 4480 wrote to memory of 1380	4480	XClient.exe	99
PID 4480 wrote to memory of 1380	4480	XClient.exe	99

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⤵
- 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:4480
- 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:3056
- 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:4472
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:336
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Public\XClient.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1380

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:4436

C:\Users\Public\XClient.exe
"C:\Users\Public\XClient.exe"
1⤵
- Executes dropped EXE
PID:1356

C:\Users\Public\XClient.exe
"C:\Users\Public\XClient.exe"
1⤵
- Executes dropped EXE
PID:3616

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Scheduled Task

T1053.005

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

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

Filesize
654B

MD5
11c6e74f0561678d2cf7fc075a6cc00c

SHA1
535ee79ba978554abcb98c566235805e7ea18490

SHA256
d39a78fabca39532fcb85ce908781a75132e1bd01cc50a3b290dd87127837d63

SHA512
32c63d67bf512b42e7f57f71287b354200126cb417ef9d869c72e0b9388a7c2f5e3b61f303f1353baa1bf482d0f17e06e23c9f50b2f1babd4d958b6da19c40b0

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

Filesize
3KB

MD5
3eb3833f769dd890afc295b977eab4b4

SHA1
e857649b037939602c72ad003e5d3698695f436f

SHA256
c485a6e2fd17c342fca60060f47d6a5655a65a412e35e001bb5bf88d96e6e485

SHA512
c24bbc8f278478d43756807b8c584d4e3fb2289db468bc92986a489f74a8da386a667a758360a397e77e018e363be8912ac260072fa3e31117ad0599ac749e72

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

Filesize
1KB

MD5
6a807b1c91ac66f33f88a787d64904c1

SHA1
83c554c7de04a8115c9005709e5cd01fca82c5d3

SHA256
155314c1c86d8d4e5b802f1eef603c5dd4a2f7c949f069a38af5ba4959bd8256

SHA512
29f2d9f30fc081e7fe6e9fb772c810c9be0422afdc6aff5a286f49a990ededebcf0d083798c2d9f41ad8434393c6d0f5fa6df31226d9c3511ba2a41eb4a65200

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

Filesize
1KB

MD5
17af719e7f1ae94675f4cce41a30f698

SHA1
a3e1e39e17fc218b0e483df64d9d7d4fa92a4b98

SHA256
21d9ecc1a6b18173bbfb12d99e9b681a19b4f6a541c5569818ce30707cff764b

SHA512
c21b433d658c5e3f66884c29fb24132f4e769e8fde43679d230058d97d3f3ef5ffb13c6ce07f155cdeca801c3aae920c7bc690b358e30295f6a9ac87ad92ac60

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_m5me00f0.tkq.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Public\XClient.exe

Filesize
58KB

MD5
0b664dbbbb3530b7f6bef9b1d61addb9

SHA1
9f5d5bd42ec1c44db3274396754db0c46ac169a5

SHA256
48d74602d8e488f13359a7c54e4ff30e3e48d44190e57153539207b57a0f3ea4

SHA512
6adff37cac5cc056f17c63b7cfefe6d7d4ab1da19ca3c5b59cbf22ead471e3c7416ff2b70eaf8be81af77dffabbd521aa563296eef6297e1e71bcbb42f9293cf

Download Submit
memory/3056-12-0x00007FFE73D10000-0x00007FFE747D2000-memory.dmp

Filesize
10.8MB

Download
memory/3056-15-0x00007FFE73D10000-0x00007FFE747D2000-memory.dmp

Filesize
10.8MB

Download
memory/3056-16-0x00007FFE73D10000-0x00007FFE747D2000-memory.dmp

Filesize
10.8MB

Download
memory/3056-19-0x00007FFE73D10000-0x00007FFE747D2000-memory.dmp

Filesize
10.8MB

Download
memory/3056-14-0x00007FFE73D10000-0x00007FFE747D2000-memory.dmp

Filesize
10.8MB

Download
memory/3056-13-0x00007FFE73D10000-0x00007FFE747D2000-memory.dmp

Filesize
10.8MB

Download
memory/3056-2-0x00000218B0A80000-0x00000218B0AA2000-memory.dmp

Filesize
136KB

Download
memory/4480-0-0x00007FFE73D13000-0x00007FFE73D15000-memory.dmp

Filesize
8KB

Download
memory/4480-43-0x00007FFE73D13000-0x00007FFE73D15000-memory.dmp

Filesize
8KB

Download
memory/4480-52-0x00007FFE73D10000-0x00007FFE747D2000-memory.dmp

Filesize
10.8MB

Download
memory/4480-53-0x00007FFE73D10000-0x00007FFE747D2000-memory.dmp

Filesize
10.8MB

Download
memory/4480-1-0x00000000005B0000-0x00000000005C4000-memory.dmp

Filesize
80KB

Download