xworm | 78644ac0e1fd8d30748e8980d15a0db7dfcd783e5b7b6f72b71d707d1799e1d9

Analysis

max time kernel
143s
max time network
152s
platform
windows7_x64
resource
win7-20241010-en
resource tags

arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
submitted
17-11-2024 12:38

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General

Target

Dek Store.exe
Size

4.0MB
MD5

0e24307ddf87b25a3ca7c5301a393633
SHA1

ec28111e105e95f3835f797d7b88b9ffa3f77683
SHA256

78644ac0e1fd8d30748e8980d15a0db7dfcd783e5b7b6f72b71d707d1799e1d9
SHA512

ae032bc7b20914d52deda07fbc50b593605863ebfb92a62c79cb6ea1efc92c14bb42f8abffc69404aca1f0b6dbf4579ab23d0e36189d371929faa7082be2e52b
SSDEEP

98304:pUZUZBlLQ8OLqmRdmgcmqPkGAnSG6qn4HoLVvrW1f:pjHQ8H0mgcRkGpG6wlr8

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

185.84.160.238:7000

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral1/files/0x000b000000016cab-10.dat	family_xworm
behavioral1/memory/1984-12-0x0000000000FB0000-0x0000000000FC8000-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
1084	powershell.exe
3020	powershell.exe
2972	powershell.exe
2856	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

Executes dropped EXE 5 IoCs

pid	Process
1456	Dek Store.exe
1984	XClient.exe
2600	XClient.exe
1788	XClient.exe
2288	XClient.exe

Loads dropped DLL 1 IoCs

pid	Process
1740	Dek Store.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\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
4	ip-api.com

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
1660	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2972	powershell.exe
2856	powershell.exe
1084	powershell.exe
3020	powershell.exe
1984	XClient.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

description	pid	Process
Token: SeDebugPrivilege	1984	XClient.exe
Token: SeDebugPrivilege	2972	powershell.exe
Token: SeDebugPrivilege	2856	powershell.exe
Token: SeDebugPrivilege	1084	powershell.exe
Token: SeDebugPrivilege	3020	powershell.exe
Token: SeDebugPrivilege	1984	XClient.exe
Token: SeDebugPrivilege	2600	XClient.exe
Token: SeDebugPrivilege	1788	XClient.exe
Token: SeDebugPrivilege	2288	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1984	XClient.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 1456	1740	Dek Store.exe	30
PID 1740 wrote to memory of 1456	1740	Dek Store.exe	30
PID 1740 wrote to memory of 1456	1740	Dek Store.exe	30
PID 1740 wrote to memory of 1984	1740	Dek Store.exe	31
PID 1740 wrote to memory of 1984	1740	Dek Store.exe	31
PID 1740 wrote to memory of 1984	1740	Dek Store.exe	31
PID 1984 wrote to memory of 2972	1984	XClient.exe	33
PID 1984 wrote to memory of 2972	1984	XClient.exe	33
PID 1984 wrote to memory of 2972	1984	XClient.exe	33
PID 1984 wrote to memory of 2856	1984	XClient.exe	35
PID 1984 wrote to memory of 2856	1984	XClient.exe	35
PID 1984 wrote to memory of 2856	1984	XClient.exe	35
PID 1984 wrote to memory of 1084	1984	XClient.exe	37
PID 1984 wrote to memory of 1084	1984	XClient.exe	37
PID 1984 wrote to memory of 1084	1984	XClient.exe	37
PID 1984 wrote to memory of 3020	1984	XClient.exe	39
PID 1984 wrote to memory of 3020	1984	XClient.exe	39
PID 1984 wrote to memory of 3020	1984	XClient.exe	39
PID 1984 wrote to memory of 1660	1984	XClient.exe	41
PID 1984 wrote to memory of 1660	1984	XClient.exe	41
PID 1984 wrote to memory of 1660	1984	XClient.exe	41
PID 2356 wrote to memory of 2600	2356	taskeng.exe	44
PID 2356 wrote to memory of 2600	2356	taskeng.exe	44
PID 2356 wrote to memory of 2600	2356	taskeng.exe	44
PID 2356 wrote to memory of 1788	2356	taskeng.exe	45
PID 2356 wrote to memory of 1788	2356	taskeng.exe	45
PID 2356 wrote to memory of 1788	2356	taskeng.exe	45
PID 2356 wrote to memory of 2288	2356	taskeng.exe	46
PID 2356 wrote to memory of 2288	2356	taskeng.exe	46
PID 2356 wrote to memory of 2288	2356	taskeng.exe	46

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\Dek Store.exe
"C:\Users\Admin\AppData\Local\Temp\Dek Store.exe"
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Users\Admin\AppData\Roaming\Dek Store.exe
  "C:\Users\Admin\AppData\Roaming\Dek Store.exe"
  2⤵
  - Executes dropped EXE
  PID:1456
- C:\Users\Admin\AppData\Roaming\XClient.exe
  "C:\Users\Admin\AppData\Roaming\XClient.exe"
  2⤵
  - Drops startup file
  - Executes dropped EXE
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - Suspicious use of WriteProcessMemory
  PID:1984
- - 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'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2972
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:2856
- - 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'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:1084
- - C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
    "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
    3⤵
    - Command and Scripting Interpreter: PowerShell
    - Suspicious behavior: EnumeratesProcesses
    - Suspicious use of AdjustPrivilegeToken
    PID:3020
- - 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"
    3⤵
    - Scheduled Task/Job: Scheduled Task
    PID:1660

C:\Windows\system32\taskeng.exe
taskeng.exe {2D228687-8E7B-4C84-A3F6-040B24034508} S-1-5-21-3692679935-4019334568-335155002-1000:BCXRJFKE\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2356
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2600
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:1788
- C:\Users\Admin\AppData\Roaming\XClient.exe
  C:\Users\Admin\AppData\Roaming\XClient.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2288

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
01c042bb1c6d34145d508eb014a230bf

SHA1
17827e8a76dc990d3b729ee79a4290aaa2073903

SHA256
89900a469d02751b384d825549c34202995fef9bddd683e85f3c22e0ee171397

SHA512
3d71836b15e35900623172d4b27e6310fe6b56cc4c7e4a76bd1f214bb19549b335a5b7077a00cbdbbf837b5d87fcf4988542b2f86eee3e87323838f941b9f986

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

Filesize
73KB

MD5
3d573feda95c5c6a254f61034e53f4ea

SHA1
4177fff9b6ef7fae2481f21cac340e4e9cf60c61

SHA256
6fd492c927c9c204f24a0948170bb70a5720c19e355ba79213ee60e45b535382

SHA512
6831d0581ce5af676269d1549d2ccf4947e3357c20b3d1452d0817b6b57ffa4fb9305704b03e38bfdfebc089489fc3e24388b29d9c73ec30cf11bd0c796e1bd3

Download Submit
\Users\Admin\AppData\Roaming\Dek Store.exe

Filesize
3.9MB

MD5
2f6e9c0dd1c6859a9d6e7acea1db9ac0

SHA1
b0dcd2be62b6a559e479de7745ab0988b8b30522

SHA256
122e3cb0f2ad233d1a364911d433667e7778f00d9a7d10b954c994f4e8093d1f

SHA512
fe3634f46afd5b45f0ffc721a18b5ef1b1344b548f90b8c54ea6995e3d64b7394b56c681b1a0522b67e862fce9d8333b621612a2f03708e7dbc917a28c58c15d

Download Submit
memory/1740-0-0x000007FEF5A63000-0x000007FEF5A64000-memory.dmp

Filesize
4KB

Download
memory/1740-1-0x0000000000AD0000-0x0000000000ECC000-memory.dmp

Filesize
4.0MB

Download
memory/1984-12-0x0000000000FB0000-0x0000000000FC8000-memory.dmp

Filesize
96KB

Download
memory/1984-13-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1984-14-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/1984-42-0x0000000000FA0000-0x0000000000FAC000-memory.dmp

Filesize
48KB

Download
memory/1984-28-0x000007FEF5A60000-0x000007FEF644C000-memory.dmp

Filesize
9.9MB

Download
memory/2856-27-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2856-26-0x000000001B340000-0x000000001B622000-memory.dmp

Filesize
2.9MB

Download
memory/2972-20-0x0000000001DE0000-0x0000000001DE8000-memory.dmp

Filesize
32KB

Download
memory/2972-19-0x000000001B3D0000-0x000000001B6B2000-memory.dmp

Filesize
2.9MB

Download