xworm | 60b290310f67adb0ae186b4b938ca466a6b55653b2519261fa425127f5500a1f

max time kernel
148s
max time network
154s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
02-09-2024 02:27

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General

Target

RAT/XClient.exe
Size

172KB
MD5

75ba783757c5b61bd841afa136fc3eda
SHA1

8db9cda9508471a23f9b743027fa115e01bc1fe1
SHA256

75a8719e83e4aecbe51287d7bfaf1e334fa190c7784324f24bcf61ab984de20a
SHA512

9a6cfbf4302336662527837bf60b30b458f8d438bd6e9563093d4948bf81c79d56578e965d836e90aafde553d1cdc9c6df81a254aafcfb3379fbe6405dce0ea1
SSDEEP

1536:vJcr5kCyoAp30kaF6CiJzt7UbjFdZe8e6TOAJkU7JsOpysa7iAMI:BcmNNxda6zZUbjHZe8jO6H2OpYuAf

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/2jTT3Lnj

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral6/memory/3928-1-0x0000000000B60000-0x0000000000B90000-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
3636	powershell.exe
1720	powershell.exe
5012	powershell.exe
664	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-1-5-21-3968772205-1713802336-1776639840-1000\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 5 IoCs

Web Service

T1102

flow	ioc
4	pastebin.com
5	pastebin.com
8	7.tcp.eu.ngrok.io
16	7.tcp.eu.ngrok.io
36	7.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
1	ip-api.com

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 13 IoCs

pid	Process
5012	powershell.exe
5012	powershell.exe
5012	powershell.exe
664	powershell.exe
664	powershell.exe
664	powershell.exe
3636	powershell.exe
3636	powershell.exe
3636	powershell.exe
1720	powershell.exe
1720	powershell.exe
1720	powershell.exe
3928	XClient.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	3928	XClient.exe
Token: SeDebugPrivilege	5012	powershell.exe
Token: SeIncreaseQuotaPrivilege	5012	powershell.exe
Token: SeSecurityPrivilege	5012	powershell.exe
Token: SeTakeOwnershipPrivilege	5012	powershell.exe
Token: SeLoadDriverPrivilege	5012	powershell.exe
Token: SeSystemProfilePrivilege	5012	powershell.exe
Token: SeSystemtimePrivilege	5012	powershell.exe
Token: SeProfSingleProcessPrivilege	5012	powershell.exe
Token: SeIncBasePriorityPrivilege	5012	powershell.exe
Token: SeCreatePagefilePrivilege	5012	powershell.exe
Token: SeBackupPrivilege	5012	powershell.exe
Token: SeRestorePrivilege	5012	powershell.exe
Token: SeShutdownPrivilege	5012	powershell.exe
Token: SeDebugPrivilege	5012	powershell.exe
Token: SeSystemEnvironmentPrivilege	5012	powershell.exe
Token: SeRemoteShutdownPrivilege	5012	powershell.exe
Token: SeUndockPrivilege	5012	powershell.exe
Token: SeManageVolumePrivilege	5012	powershell.exe
Token: 33	5012	powershell.exe
Token: 34	5012	powershell.exe
Token: 35	5012	powershell.exe
Token: 36	5012	powershell.exe
Token: SeDebugPrivilege	664	powershell.exe
Token: SeIncreaseQuotaPrivilege	664	powershell.exe
Token: SeSecurityPrivilege	664	powershell.exe
Token: SeTakeOwnershipPrivilege	664	powershell.exe
Token: SeLoadDriverPrivilege	664	powershell.exe
Token: SeSystemProfilePrivilege	664	powershell.exe
Token: SeSystemtimePrivilege	664	powershell.exe
Token: SeProfSingleProcessPrivilege	664	powershell.exe
Token: SeIncBasePriorityPrivilege	664	powershell.exe
Token: SeCreatePagefilePrivilege	664	powershell.exe
Token: SeBackupPrivilege	664	powershell.exe
Token: SeRestorePrivilege	664	powershell.exe
Token: SeShutdownPrivilege	664	powershell.exe
Token: SeDebugPrivilege	664	powershell.exe
Token: SeSystemEnvironmentPrivilege	664	powershell.exe
Token: SeRemoteShutdownPrivilege	664	powershell.exe
Token: SeUndockPrivilege	664	powershell.exe
Token: SeManageVolumePrivilege	664	powershell.exe
Token: 33	664	powershell.exe
Token: 34	664	powershell.exe
Token: 35	664	powershell.exe
Token: 36	664	powershell.exe
Token: SeDebugPrivilege	3636	powershell.exe
Token: SeIncreaseQuotaPrivilege	3636	powershell.exe
Token: SeSecurityPrivilege	3636	powershell.exe
Token: SeTakeOwnershipPrivilege	3636	powershell.exe
Token: SeLoadDriverPrivilege	3636	powershell.exe
Token: SeSystemProfilePrivilege	3636	powershell.exe
Token: SeSystemtimePrivilege	3636	powershell.exe
Token: SeProfSingleProcessPrivilege	3636	powershell.exe
Token: SeIncBasePriorityPrivilege	3636	powershell.exe
Token: SeCreatePagefilePrivilege	3636	powershell.exe
Token: SeBackupPrivilege	3636	powershell.exe
Token: SeRestorePrivilege	3636	powershell.exe
Token: SeShutdownPrivilege	3636	powershell.exe
Token: SeDebugPrivilege	3636	powershell.exe
Token: SeSystemEnvironmentPrivilege	3636	powershell.exe
Token: SeRemoteShutdownPrivilege	3636	powershell.exe
Token: SeUndockPrivilege	3636	powershell.exe
Token: SeManageVolumePrivilege	3636	powershell.exe
Token: 33	3636	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3928	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3928 wrote to memory of 5012	3928	XClient.exe	72
PID 3928 wrote to memory of 5012	3928	XClient.exe	72
PID 3928 wrote to memory of 664	3928	XClient.exe	75
PID 3928 wrote to memory of 664	3928	XClient.exe	75
PID 3928 wrote to memory of 3636	3928	XClient.exe	77
PID 3928 wrote to memory of 3636	3928	XClient.exe	77
PID 3928 wrote to memory of 1720	3928	XClient.exe	79
PID 3928 wrote to memory of 1720	3928	XClient.exe	79

C:\Users\Admin\AppData\Local\Temp\RAT\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\RAT\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:3928
- 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\RAT\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5012
- 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:664
- 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:3636
- 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
  PID:1720

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

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

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

Filesize
3KB

MD5
8592ba100a78835a6b94d5949e13dfc1

SHA1
63e901200ab9a57c7dd4c078d7f75dcd3b357020

SHA256
fdd7d9def6f9f0c0f2e60dbc8a2d1999071cd7d3095e9e087bb1cda7a614ac3c

SHA512
87f98e6cb61b2a2a7d65710c4d33881d89715eb7a06e00d492259f35c3902498baabffc5886be0ec5a14312ad4c262e3fc40cd3a5cb91701af0fb229726b88c3

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

Filesize
1KB

MD5
6e1a132ea36181b103e02d463da0e0bf

SHA1
160620eac2b420a8e7386eba606fee8d0d708806

SHA256
c4537fb44d5808f6450d8ee2ac61c963bd2c6e3e650e7b48b5d83b5d11d2b30a

SHA512
3034a371f9c3c70ee7fed8e71544034aaff972ca30b729c8a9ea2e5486b35157e29f2f8c7a9cbc374488aeb2f2c0dacf177b71231a62ce76e59a2f0cd445f2b5

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

Filesize
1KB

MD5
a80ff6cefb84e519d8943755966fe9ac

SHA1
269fa826a6a0ec6979cd1e5f58dac18d33f7019a

SHA256
757e1059a78096f4c5a7481323f411001d60aadc90ee96f192421b7765177e27

SHA512
15284c2238a7efadeeef952431d7e2195885c011b2c94cddc7357aec5039d461eaf50cdeea8b0aca8cd809c6f0cb784cb0c076f5c79dfed8c52f21b9e39d2d6a

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

Filesize
1KB

MD5
e7a4c24b86dff71e27d7be17baad98c2

SHA1
8e0340cdf9d76314192d5df9a0a7fc451725858d

SHA256
aee56697d10648b7f7a580c40b9cc38db98a6c8d47f77a58aa889f151daefeba

SHA512
c81dc67e33040e2b6cc960474191f9643c5ac7d5a02d1dfd2f86c551320115efe448288b68d31aafb3df1f723a7756d0570cdf32d8e089f1f64626153221d0e3

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_1gwr0gsn.biw.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
memory/3928-1-0x0000000000B60000-0x0000000000B90000-memory.dmp

Filesize
192KB

Download
memory/3928-2-0x00007FFAA1110000-0x00007FFAA1AFC000-memory.dmp

Filesize
9.9MB

Download
memory/3928-186-0x00007FFAA1110000-0x00007FFAA1AFC000-memory.dmp

Filesize
9.9MB

Download
memory/3928-0-0x00007FFAA1113000-0x00007FFAA1114000-memory.dmp

Filesize
4KB

Download
memory/5012-10-0x00007FFAA1110000-0x00007FFAA1AFC000-memory.dmp

Filesize
9.9MB

Download
memory/5012-51-0x00007FFAA1110000-0x00007FFAA1AFC000-memory.dmp

Filesize
9.9MB

Download
memory/5012-13-0x000001896F9D0000-0x000001896FA46000-memory.dmp

Filesize
472KB

Download
memory/5012-9-0x00007FFAA1110000-0x00007FFAA1AFC000-memory.dmp

Filesize
9.9MB

Download
memory/5012-8-0x000001896F800000-0x000001896F822000-memory.dmp

Filesize
136KB

Download
memory/5012-7-0x00007FFAA1110000-0x00007FFAA1AFC000-memory.dmp

Filesize
9.9MB

Download