xworm | f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8

Analysis

max time kernel
597s
max time network
600s
platform
windows10-1703_x64
resource
win10-20240404-en
resource tags

arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
submitted
05-06-2024 16:53

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General

Target

XClient.exe
Size

43KB
MD5

9a6ce16635ceb90281c16062ae68a06c
SHA1

319ee0e49c3a23cf6afa7cb34d358247b6fbc89e
SHA256

f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8
SHA512

ec1e632a6efc0c8aa20386c3925a3b3a2941a33992d788de6d5a777a10c267e073b57d8a95af3d00684b0c4c33efb060f1d126c95179de731a19c71da36eb589
SSDEEP

768:ZY8ErOTKMYpyyNRyjymZ49pnWwFFEPh9Cf66FOChtk2lHxfgm:6/OUTc6Fw9y66FOCIwRt

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

3.0

lunassworld-50930.portmap.host:5508

Mutex

tBgRQhKX6pJuMKdy

Attributes

Install_directory
%AppData%
install_file
USB.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/memory/4780-1-0x0000000000560000-0x0000000000572000-memory.dmp	family_xworm
behavioral1/files/0x000e00000001ab6a-144.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
1532	powershell.exe
804	powershell.exe
4772	powershell.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	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe

Executes dropped EXE 9 IoCs

pid	Process
3656	XClient.exe
592	XClient.exe
4452	XClient.exe
4388	XClient.exe
4952	XClient.exe
3000	XClient.exe
1156	XClient.exe
4376	XClient.exe
1012	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-1-5-21-1687926120-3022217735-1146543763-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.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
1	ip-api.com

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task/Job

T1053

pid	Process
4216	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
1532	powershell.exe
1532	powershell.exe
1532	powershell.exe
804	powershell.exe
804	powershell.exe
804	powershell.exe
4772	powershell.exe
4772	powershell.exe
4772	powershell.exe
4780	XClient.exe

Suspicious use of AdjustPrivilegeToken 64 IoCs

description	pid	Process
Token: SeDebugPrivilege	4780	XClient.exe
Token: SeDebugPrivilege	1532	powershell.exe
Token: SeIncreaseQuotaPrivilege	1532	powershell.exe
Token: SeSecurityPrivilege	1532	powershell.exe
Token: SeTakeOwnershipPrivilege	1532	powershell.exe
Token: SeLoadDriverPrivilege	1532	powershell.exe
Token: SeSystemProfilePrivilege	1532	powershell.exe
Token: SeSystemtimePrivilege	1532	powershell.exe
Token: SeProfSingleProcessPrivilege	1532	powershell.exe
Token: SeIncBasePriorityPrivilege	1532	powershell.exe
Token: SeCreatePagefilePrivilege	1532	powershell.exe
Token: SeBackupPrivilege	1532	powershell.exe
Token: SeRestorePrivilege	1532	powershell.exe
Token: SeShutdownPrivilege	1532	powershell.exe
Token: SeDebugPrivilege	1532	powershell.exe
Token: SeSystemEnvironmentPrivilege	1532	powershell.exe
Token: SeRemoteShutdownPrivilege	1532	powershell.exe
Token: SeUndockPrivilege	1532	powershell.exe
Token: SeManageVolumePrivilege	1532	powershell.exe
Token: 33	1532	powershell.exe
Token: 34	1532	powershell.exe
Token: 35	1532	powershell.exe
Token: 36	1532	powershell.exe
Token: SeDebugPrivilege	804	powershell.exe
Token: SeIncreaseQuotaPrivilege	804	powershell.exe
Token: SeSecurityPrivilege	804	powershell.exe
Token: SeTakeOwnershipPrivilege	804	powershell.exe
Token: SeLoadDriverPrivilege	804	powershell.exe
Token: SeSystemProfilePrivilege	804	powershell.exe
Token: SeSystemtimePrivilege	804	powershell.exe
Token: SeProfSingleProcessPrivilege	804	powershell.exe
Token: SeIncBasePriorityPrivilege	804	powershell.exe
Token: SeCreatePagefilePrivilege	804	powershell.exe
Token: SeBackupPrivilege	804	powershell.exe
Token: SeRestorePrivilege	804	powershell.exe
Token: SeShutdownPrivilege	804	powershell.exe
Token: SeDebugPrivilege	804	powershell.exe
Token: SeSystemEnvironmentPrivilege	804	powershell.exe
Token: SeRemoteShutdownPrivilege	804	powershell.exe
Token: SeUndockPrivilege	804	powershell.exe
Token: SeManageVolumePrivilege	804	powershell.exe
Token: 33	804	powershell.exe
Token: 34	804	powershell.exe
Token: 35	804	powershell.exe
Token: 36	804	powershell.exe
Token: SeDebugPrivilege	4772	powershell.exe
Token: SeIncreaseQuotaPrivilege	4772	powershell.exe
Token: SeSecurityPrivilege	4772	powershell.exe
Token: SeTakeOwnershipPrivilege	4772	powershell.exe
Token: SeLoadDriverPrivilege	4772	powershell.exe
Token: SeSystemProfilePrivilege	4772	powershell.exe
Token: SeSystemtimePrivilege	4772	powershell.exe
Token: SeProfSingleProcessPrivilege	4772	powershell.exe
Token: SeIncBasePriorityPrivilege	4772	powershell.exe
Token: SeCreatePagefilePrivilege	4772	powershell.exe
Token: SeBackupPrivilege	4772	powershell.exe
Token: SeRestorePrivilege	4772	powershell.exe
Token: SeShutdownPrivilege	4772	powershell.exe
Token: SeDebugPrivilege	4772	powershell.exe
Token: SeSystemEnvironmentPrivilege	4772	powershell.exe
Token: SeRemoteShutdownPrivilege	4772	powershell.exe
Token: SeUndockPrivilege	4772	powershell.exe
Token: SeManageVolumePrivilege	4772	powershell.exe
Token: 33	4772	powershell.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4780	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4780 wrote to memory of 1532	4780	XClient.exe	74
PID 4780 wrote to memory of 1532	4780	XClient.exe	74
PID 4780 wrote to memory of 804	4780	XClient.exe	77
PID 4780 wrote to memory of 804	4780	XClient.exe	77
PID 4780 wrote to memory of 4772	4780	XClient.exe	79
PID 4780 wrote to memory of 4772	4780	XClient.exe	79
PID 4780 wrote to memory of 4216	4780	XClient.exe	81
PID 4780 wrote to memory of 4216	4780	XClient.exe	81

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⤵
- 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:4780
- 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:1532
- 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:804
- 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:4772
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Creates scheduled task(s)
  PID:4216

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:3656

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:592

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:4452

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:4388

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:4952

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:3000

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:1156

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:4376

C:\Users\Admin\AppData\Roaming\XClient.exe
C:\Users\Admin\AppData\Roaming\XClient.exe
1⤵
- Executes dropped EXE
PID:1012

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Scheduled Task/Job

T1053

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
16c5fce5f7230eea11598ec11ed42862

SHA1
75392d4824706090f5e8907eee1059349c927600

SHA256
87ba77c13905298acbac72be90949c4fe0755b6eff9777615aa37f252515f151

SHA512
153edd6da59beea6cc411ed7383c32916425d6ebb65f04c65aab7c1d6b25443d143aa8449aa92149de0ad8a975f6ecaa60f9f7574536eec6b38fe5fd3a6c6adc

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

Filesize
3KB

MD5
ad5cd538ca58cb28ede39c108acb5785

SHA1
1ae910026f3dbe90ed025e9e96ead2b5399be877

SHA256
c9e6cb04d6c893458d5a7e12eb575cf97c3172f5e312b1f63a667cbbc5f0c033

SHA512
c066c5d9b276a68fa636647bb29aea05bfa2292217bc77f5324d9c1d93117772ee8277e1f7cff91ec8d6b7c05ca078f929cecfdbb09582522a9067f54740af13

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

Filesize
1KB

MD5
1d2c0681de9dfeea4d558f02848b2599

SHA1
e7f25a5765731fe7e05fa4578e500a3b8992abaf

SHA256
7c7206e68283d4cd81e737aa35815c52c2a7494d2100ec3fb8414e38cc7a2194

SHA512
bd27e1f1c7185e0aee2f914d037612dd32a818c4d9de6e39735fea0b7129ac71623ebf703c8a7c5122924a00c0ef527b6face8ba1934d4d660e61802e57d688b

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

Filesize
1KB

MD5
f59911d76ebb20d5b54e35385bf1ffc0

SHA1
8f330ae60ce0710798a05b510e0c9f34e8f664f1

SHA256
9e143ee8c1bad02d622f7fd138c15e466640f230927d988054dc32beb6f266d1

SHA512
b6b7074c4ee6fe5f717de8f6576e87cc6ec50340dfdfbfbe46b463d64443bb161ced6586d94907e4eda3ddf2298dfa6f4d6cbd71ecfcb17f7ea7c5d017e95416

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_srfvef55.sm4.ps1

Filesize
1B

MD5
c4ca4238a0b923820dcc509a6f75849b

SHA1
356a192b7913b04c54574d18c28d46e6395428ab

SHA256
6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b

SHA512
4dff4ea340f0a823f15d3f4f01ab62eae0e5da579ccb851f8db9dfe84c58b2b37b89903a740e1ee172da793a6e79d560e5f7f9bd058a12a280433ed6fa46510a

Download Submit
C:\Users\Admin\AppData\Roaming\XClient.exe

Filesize
43KB

MD5
9a6ce16635ceb90281c16062ae68a06c

SHA1
319ee0e49c3a23cf6afa7cb34d358247b6fbc89e

SHA256
f9a8f2e29dc5966bcb6f5a9b118a0e2cb2807619d9ce16dbb18e71737bf44ac8

SHA512
ec1e632a6efc0c8aa20386c3925a3b3a2941a33992d788de6d5a777a10c267e073b57d8a95af3d00684b0c4c33efb060f1d126c95179de731a19c71da36eb589

Download Submit
memory/1532-8-0x00000113C6170000-0x00000113C6192000-memory.dmp

Filesize
136KB

Download
memory/1532-12-0x00007FF983740000-0x00007FF98412C000-memory.dmp

Filesize
9.9MB

Download
memory/1532-13-0x00000113DE8A0000-0x00000113DE916000-memory.dmp

Filesize
472KB

Download
memory/1532-51-0x00007FF983740000-0x00007FF98412C000-memory.dmp

Filesize
9.9MB

Download
memory/1532-11-0x00007FF983740000-0x00007FF98412C000-memory.dmp

Filesize
9.9MB

Download
memory/1532-7-0x00007FF983740000-0x00007FF98412C000-memory.dmp

Filesize
9.9MB

Download
memory/4780-0-0x00007FF983743000-0x00007FF983744000-memory.dmp

Filesize
4KB

Download
memory/4780-2-0x00007FF983740000-0x00007FF98412C000-memory.dmp

Filesize
9.9MB

Download
memory/4780-146-0x00007FF983743000-0x00007FF983744000-memory.dmp

Filesize
4KB

Download
memory/4780-147-0x00007FF983740000-0x00007FF98412C000-memory.dmp

Filesize
9.9MB

Download
memory/4780-1-0x0000000000560000-0x0000000000572000-memory.dmp

Filesize
72KB

Download