xworm | 824b0ff9ae20df608469250c49ed475a55953215d41d65d69c972403c30bb3b5

Analysis

max time kernel
137s
max time network
154s
platform
windows10-ltsc 2021_x64
resource
win10ltsc2021-20241023-en
resource tags

arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
submitted
03-11-2024 19:18

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General

Target

XClient.exe
Size

39KB
MD5

26018b1cc33026362d9e0c234be46f09
SHA1

54b4a4bbd362cb73bf8460060341d41bd5da7c7c
SHA256

824b0ff9ae20df608469250c49ed475a55953215d41d65d69c972403c30bb3b5
SHA512

bd00efbb6b036b0ee1e9c1355de7edc75813c08b8c3df5ddca2744e47cd32b05f2a217caf85ac0ff2dab236a907c78ea48ce2a892f6f38774f4dc3c77e944c7d
SSDEEP

768:SkHHygWYC45lLJKuuwhSYypufFWPa9b/u6POwhfambD:DHHygW94VJKuuwhSjEFv9bm6POwVzP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

147.185.221.19:2137

147.185.221.19:33365:2137

147.185.221.19:2137:2137

Mutex

rAejCyCNPpsrjmZq

Attributes

Install_directory
%AppData%
install_file
Wiindows Update.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/408-1-0x0000000000990000-0x00000000009A0000-memory.dmp	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 4 IoCs

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

execution

PowerShell

T1059.001

pid	Process
1752	powershell.exe
4020	powershell.exe
796	powershell.exe
2100	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-1-5-21-87863914-780023816-688321450-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Wiindows Update.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Wiindows Update.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-1-5-21-87863914-780023816-688321450-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\Wiindows Update = "C:\\Users\\Admin\\AppData\\Roaming\\Wiindows Update.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
1368	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
2100	powershell.exe
2100	powershell.exe
1752	powershell.exe
1752	powershell.exe
4020	powershell.exe
4020	powershell.exe
796	powershell.exe
796	powershell.exe
408	XClient.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	408	XClient.exe
Token: SeDebugPrivilege	2100	powershell.exe
Token: SeIncreaseQuotaPrivilege	2100	powershell.exe
Token: SeSecurityPrivilege	2100	powershell.exe
Token: SeTakeOwnershipPrivilege	2100	powershell.exe
Token: SeLoadDriverPrivilege	2100	powershell.exe
Token: SeSystemProfilePrivilege	2100	powershell.exe
Token: SeSystemtimePrivilege	2100	powershell.exe
Token: SeProfSingleProcessPrivilege	2100	powershell.exe
Token: SeIncBasePriorityPrivilege	2100	powershell.exe
Token: SeCreatePagefilePrivilege	2100	powershell.exe
Token: SeBackupPrivilege	2100	powershell.exe
Token: SeRestorePrivilege	2100	powershell.exe
Token: SeShutdownPrivilege	2100	powershell.exe
Token: SeDebugPrivilege	2100	powershell.exe
Token: SeSystemEnvironmentPrivilege	2100	powershell.exe
Token: SeRemoteShutdownPrivilege	2100	powershell.exe
Token: SeUndockPrivilege	2100	powershell.exe
Token: SeManageVolumePrivilege	2100	powershell.exe
Token: 33	2100	powershell.exe
Token: 34	2100	powershell.exe
Token: 35	2100	powershell.exe
Token: 36	2100	powershell.exe
Token: SeDebugPrivilege	1752	powershell.exe
Token: SeIncreaseQuotaPrivilege	1752	powershell.exe
Token: SeSecurityPrivilege	1752	powershell.exe
Token: SeTakeOwnershipPrivilege	1752	powershell.exe
Token: SeLoadDriverPrivilege	1752	powershell.exe
Token: SeSystemProfilePrivilege	1752	powershell.exe
Token: SeSystemtimePrivilege	1752	powershell.exe
Token: SeProfSingleProcessPrivilege	1752	powershell.exe
Token: SeIncBasePriorityPrivilege	1752	powershell.exe
Token: SeCreatePagefilePrivilege	1752	powershell.exe
Token: SeBackupPrivilege	1752	powershell.exe
Token: SeRestorePrivilege	1752	powershell.exe
Token: SeShutdownPrivilege	1752	powershell.exe
Token: SeDebugPrivilege	1752	powershell.exe
Token: SeSystemEnvironmentPrivilege	1752	powershell.exe
Token: SeRemoteShutdownPrivilege	1752	powershell.exe
Token: SeUndockPrivilege	1752	powershell.exe
Token: SeManageVolumePrivilege	1752	powershell.exe
Token: 33	1752	powershell.exe
Token: 34	1752	powershell.exe
Token: 35	1752	powershell.exe
Token: 36	1752	powershell.exe
Token: SeDebugPrivilege	4020	powershell.exe
Token: SeIncreaseQuotaPrivilege	4020	powershell.exe
Token: SeSecurityPrivilege	4020	powershell.exe
Token: SeTakeOwnershipPrivilege	4020	powershell.exe
Token: SeLoadDriverPrivilege	4020	powershell.exe
Token: SeSystemProfilePrivilege	4020	powershell.exe
Token: SeSystemtimePrivilege	4020	powershell.exe
Token: SeProfSingleProcessPrivilege	4020	powershell.exe
Token: SeIncBasePriorityPrivilege	4020	powershell.exe
Token: SeCreatePagefilePrivilege	4020	powershell.exe
Token: SeBackupPrivilege	4020	powershell.exe
Token: SeRestorePrivilege	4020	powershell.exe
Token: SeShutdownPrivilege	4020	powershell.exe
Token: SeDebugPrivilege	4020	powershell.exe
Token: SeSystemEnvironmentPrivilege	4020	powershell.exe
Token: SeRemoteShutdownPrivilege	4020	powershell.exe
Token: SeUndockPrivilege	4020	powershell.exe
Token: SeManageVolumePrivilege	4020	powershell.exe
Token: 33	4020	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
408	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 408 wrote to memory of 2100	408	XClient.exe	84
PID 408 wrote to memory of 2100	408	XClient.exe	84
PID 408 wrote to memory of 1752	408	XClient.exe	87
PID 408 wrote to memory of 1752	408	XClient.exe	87
PID 408 wrote to memory of 4020	408	XClient.exe	89
PID 408 wrote to memory of 4020	408	XClient.exe	89
PID 408 wrote to memory of 796	408	XClient.exe	91
PID 408 wrote to memory of 796	408	XClient.exe	91
PID 408 wrote to memory of 1368	408	XClient.exe	93
PID 408 wrote to memory of 1368	408	XClient.exe	93

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:408
- 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:2100
- 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:1752
- 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\Wiindows Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4020
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Wiindows Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  PID:796
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Wiindows Update" /tr "C:\Users\Admin\AppData\Roaming\Wiindows Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1368

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\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
c67441dfa09f61bca500bb43407c56b8

SHA1
5a56cf7cbeb48c109e2128c31b681fac3959157b

SHA256
63082da456c124d0bc516d2161d1613db5f3008d903e4066d2c7b4e90b435f33

SHA512
325de8b718b3a01df05e20e028c5882240e5fd2e96c771361b776312923ff178f27494a1f5249bf6d7365a99155eb8735a51366e85597008e6a10462e63ee0e8

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

Filesize
1KB

MD5
2caedf4a5a478099693e0888a7646597

SHA1
9f0389cf7ee1b4e3e6b33b89fb5225cd741db097

SHA256
fbeaf47488fd7a4ccb599c6d48e06df9ff2c9d4f8c61d03abf8b02e4147c008b

SHA512
e5ee648e0e9c64e212f4faa5347cc1d880d63bec29d34f06ef9ff526960d5e6a6047a6efd9dab654108182cdeb8c3f37b9611c15ebd7614e7236a104c3e82fcd

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

Filesize
1KB

MD5
e37a04719a3b26b86f2af4dc8ab62bb2

SHA1
bf986343ed5465df90e6ea1236df58b8389f028b

SHA256
e1046d33954c816c9344851bb05afcd4dca2ef001834c5c48926fc0d58c7e7a2

SHA512
6a0feeb4036efdbe86f6084e2572777c9576c67a9bdb596bdfd92325cd072fc236250ba966a1db8c42819587c827c5d1f30971958bfafb16a38c9d9682674155

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ypq3f3s5.way.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/408-1-0x0000000000990000-0x00000000009A0000-memory.dmp

Filesize
64KB

Download
memory/408-60-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/408-0-0x00007FF937883000-0x00007FF937885000-memory.dmp

Filesize
8KB

Download
memory/408-59-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/408-58-0x00007FF937883000-0x00007FF937885000-memory.dmp

Filesize
8KB

Download
memory/2100-12-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2100-18-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2100-19-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2100-15-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2100-14-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2100-13-0x00007FF937880000-0x00007FF938342000-memory.dmp

Filesize
10.8MB

Download
memory/2100-11-0x0000020047D30000-0x0000020047D52000-memory.dmp

Filesize
136KB

Download