xworm | 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3

Analysis

max time kernel
137s
max time network
152s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
04/11/2024, 16:44

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General

Target
mygame.exe
Size 137KB
Sample241104-t835sswlan
SHA256 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3
MD5 1a925fce50787a5028b73dd32e0c7dce
SHA1 7205d5c3d7efbc5805eb0b343a1bc83903e7589c
SHA512 ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8
SSDEEP 3072:6fjh7Fv9fjOwiBz65/M6If+3Js+3JFkKeTno:8hJv9AxBt25
MD5 SHA1 SHA512 SSDEEP

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

147.185.221.23:48450

Mutex

2YsFPOHVMLfmF9px

Attributes

Install_directory
%AppData%
install_file
Update.exe

aes.plain

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral2/memory/804-1-0x0000000001220000-0x0000000001248000-memory.dmp	family_xworm
behavioral2/files/0x000b000000016ace-32.dat	family_xworm
behavioral2/memory/1936-34-0x0000000000B20000-0x0000000000B48000-memory.dmp	family_xworm
behavioral2/memory/432-38-0x0000000000D10000-0x0000000000D38000-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
2536	powershell.exe
2872	powershell.exe
2736	powershell.exe
2784	powershell.exe

Drops startup file 2 IoCs

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

Executes dropped EXE 3 IoCs

pid	Process
1936	Update.exe
432	Update.exe
568	Update.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-1-5-21-3692679935-4019334568-335155002-1000\Software\Microsoft\Windows\CurrentVersion\Run\Update = "C:\\Users\\Admin\\AppData\\Roaming\\Update.exe"	mygame.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
2124	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2536	powershell.exe
2872	powershell.exe
2736	powershell.exe
2784	powershell.exe
804	mygame.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	804	mygame.exe
Token: SeDebugPrivilege	2536	powershell.exe
Token: SeDebugPrivilege	2872	powershell.exe
Token: SeDebugPrivilege	2736	powershell.exe
Token: SeDebugPrivilege	2784	powershell.exe
Token: SeDebugPrivilege	804	mygame.exe
Token: SeDebugPrivilege	1936	Update.exe
Token: SeDebugPrivilege	432	Update.exe
Token: SeDebugPrivilege	568	Update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
804	mygame.exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 804 wrote to memory of 2536	804	mygame.exe	31
PID 804 wrote to memory of 2536	804	mygame.exe	31
PID 804 wrote to memory of 2536	804	mygame.exe	31
PID 804 wrote to memory of 2872	804	mygame.exe	33
PID 804 wrote to memory of 2872	804	mygame.exe	33
PID 804 wrote to memory of 2872	804	mygame.exe	33
PID 804 wrote to memory of 2736	804	mygame.exe	35
PID 804 wrote to memory of 2736	804	mygame.exe	35
PID 804 wrote to memory of 2736	804	mygame.exe	35
PID 804 wrote to memory of 2784	804	mygame.exe	37
PID 804 wrote to memory of 2784	804	mygame.exe	37
PID 804 wrote to memory of 2784	804	mygame.exe	37
PID 804 wrote to memory of 2124	804	mygame.exe	39
PID 804 wrote to memory of 2124	804	mygame.exe	39
PID 804 wrote to memory of 2124	804	mygame.exe	39
PID 656 wrote to memory of 1936	656	taskeng.exe	42
PID 656 wrote to memory of 1936	656	taskeng.exe	42
PID 656 wrote to memory of 1936	656	taskeng.exe	42
PID 656 wrote to memory of 432	656	taskeng.exe	44
PID 656 wrote to memory of 432	656	taskeng.exe	44
PID 656 wrote to memory of 432	656	taskeng.exe	44
PID 656 wrote to memory of 568	656	taskeng.exe	45
PID 656 wrote to memory of 568	656	taskeng.exe	45
PID 656 wrote to memory of 568	656	taskeng.exe	45

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\mygame.exe
"C:\Users\Admin\AppData\Local\Temp\mygame.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: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\Local\Temp\mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2536
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'mygame.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2872
- 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\Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2736
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2784
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Update" /tr "C:\Users\Admin\AppData\Roaming\Update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2124

C:\Windows\system32\taskeng.exe
taskeng.exe {A4EEB458-2C0F-43DC-ADBF-68060A6A91F6} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:656
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1936
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:432
- C:\Users\Admin\AppData\Roaming\Update.exe
  C:\Users\Admin\AppData\Roaming\Update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:568

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

Replay Monitor

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Downloads

590aee7bdd69b59b.customDestinations-ms

Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Size 7KB
SHA256 83b99435f77aec4e2fe19e685859e965020c2b0c6a91eb5642ae259653c0d443
MD5 74db9431fccd7792aa0a22c331fd50e1
SHA1 ced676058b3f1ecf0f18409a6b32044e2b29cf11
SHA512 5531205bf2337345212f5543d8f4094810c6a36641777372289361518fbb877e8dcec551590de046592aa5e3c1705b69def74ab82d0b7da9202e2ea266b4f8a2
SSDEEP 96:f0pmCgnM8TnqvsqvJCwon0pmCgnM8TnqvsEHyqvJCworXLlMQHQ67oDXlUVH:fUqnPUonUqnPAHnorXOV67oD8
MD5 SHA1 SHA512 SSDEEP

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Update.exe

Path C:\Users\Admin\AppData\Roaming\Update.exe
Size 137KB
SHA256 00956e3a55867b348d29da5f04cf6fb51e85872389ce6dc5f4015a958c575fb3
MD5 1a925fce50787a5028b73dd32e0c7dce
SHA1 7205d5c3d7efbc5805eb0b343a1bc83903e7589c
SHA512 ceec3fa381bbcb32fb520b876fac67defc2712fcf7dcbf4a69d50a227c8f81f1cbb3aac03fc0f2ac007105b9b378c5a1c405ec2b326bf284795c0ae0e85d93a8
SSDEEP 3072:6fjh7Fv9fjOwiBz65/M6If+3Js+3JFkKeTno:8hJv9AxBt25
MD5 SHA1 SHA512 SSDEEP

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memory/432-38-0x0000000000D10000-0x0000000000D38000-memory.dmp

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memory/804-30-0x000000001B350000-0x000000001B3D0000-memory.dmp

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memory/804-1-0x0000000001220000-0x0000000001248000-memory.dmp

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memory/804-0-0x000007FEF58E3000-0x000007FEF58E4000-memory.dmp

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memory/804-35-0x000000001B350000-0x000000001B3D0000-memory.dmp

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memory/1936-34-0x0000000000B20000-0x0000000000B48000-memory.dmp

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memory/2536-7-0x000000001B350000-0x000000001B632000-memory.dmp

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memory/2536-8-0x0000000002460000-0x0000000002468000-memory.dmp

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memory/2536-6-0x0000000002470000-0x00000000024F0000-memory.dmp

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memory/2872-15-0x00000000022E0000-0x00000000022E8000-memory.dmp

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memory/2872-14-0x000000001B2E0000-0x000000001B5C2000-memory.dmp

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