xworm | e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654

General

Target

XClient (1).exe
Size

41KB
MD5

8ac12cc24b5ac76188fe9612dc51777e
SHA1

0c0dddf34dbf7b95e82c58fdb7cfabb80db90430
SHA256

e53bd0b8797b8c0cc32875dba3469b938eb8d1c3812b2829378cdb7d40b62654
SHA512

02c4abdc825b0d3b9a88a1d66232d6f42497b7d83c6bfc473df8efbc0350371653d3ce220409aa5968cf71396ec230dea52e3793085d1f06d2338e4360c8bc93
SSDEEP

768:LrJDweBDuOkScrbsN/x6WECAr43MkfJF5Pa9p+U6iOwhF3/ibK:pDwewicrbsN/YDRr4RF49IU6iOwv6G

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

57.128.132.221:7000

Mutex

A0pVR4huor1J3yZ3

Attributes

Install_directory
%AppData%
install_file
Win32runtime.exe

aes.plain

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1732-1-0x0000000001290000-0x00000000012A0000-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
2556	powershell.exe
2336	powershell.exe
2696	powershell.exe
2784	powershell.exe

Deletes itself 1 IoCs

pid	Process
3064	cmd.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\Win32runtime.lnk	XClient (1).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-1-5-21-312935884-697965778-3955649944-1000\Software\Microsoft\Windows\CurrentVersion\Run\Win32runtime = "C:\\Users\\Admin\\AppData\\Roaming\\Win32runtime.exe"	XClient (1).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

Delays execution with timeout.exe 1 IoCs

defense_evasion

pid	Process
1896	timeout.exe

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
1156	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2696	powershell.exe
2784	powershell.exe
2556	powershell.exe
2336	powershell.exe
1732	XClient (1).exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1732	XClient (1).exe
Token: SeDebugPrivilege	2696	powershell.exe
Token: SeDebugPrivilege	2784	powershell.exe
Token: SeDebugPrivilege	2556	powershell.exe
Token: SeDebugPrivilege	2336	powershell.exe
Token: SeDebugPrivilege	1732	XClient (1).exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1732	XClient (1).exe

Suspicious use of WriteProcessMemory 24 IoCs

description	pid	Process	procid_target
PID 1732 wrote to memory of 2696	1732	XClient (1).exe	32
PID 1732 wrote to memory of 2696	1732	XClient (1).exe	32
PID 1732 wrote to memory of 2696	1732	XClient (1).exe	32
PID 1732 wrote to memory of 2784	1732	XClient (1).exe	34
PID 1732 wrote to memory of 2784	1732	XClient (1).exe	34
PID 1732 wrote to memory of 2784	1732	XClient (1).exe	34
PID 1732 wrote to memory of 2556	1732	XClient (1).exe	36
PID 1732 wrote to memory of 2556	1732	XClient (1).exe	36
PID 1732 wrote to memory of 2556	1732	XClient (1).exe	36
PID 1732 wrote to memory of 2336	1732	XClient (1).exe	38
PID 1732 wrote to memory of 2336	1732	XClient (1).exe	38
PID 1732 wrote to memory of 2336	1732	XClient (1).exe	38
PID 1732 wrote to memory of 1156	1732	XClient (1).exe	40
PID 1732 wrote to memory of 1156	1732	XClient (1).exe	40
PID 1732 wrote to memory of 1156	1732	XClient (1).exe	40
PID 1732 wrote to memory of 380	1732	XClient (1).exe	42
PID 1732 wrote to memory of 380	1732	XClient (1).exe	42
PID 1732 wrote to memory of 380	1732	XClient (1).exe	42
PID 1732 wrote to memory of 3064	1732	XClient (1).exe	44
PID 1732 wrote to memory of 3064	1732	XClient (1).exe	44
PID 1732 wrote to memory of 3064	1732	XClient (1).exe	44
PID 3064 wrote to memory of 1896	3064	cmd.exe	46
PID 3064 wrote to memory of 1896	3064	cmd.exe	46
PID 3064 wrote to memory of 1896	3064	cmd.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\XClient (1).exe
"C:\Users\Admin\AppData\Local\Temp\XClient (1).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:1732
- 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 (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2696
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient (1).exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2784
- 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\Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2556
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'Win32runtime.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2336
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "Win32runtime" /tr "C:\Users\Admin\AppData\Roaming\Win32runtime.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1156
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /delete /f /tn "Win32runtime"
  2⤵
  PID:380
- C:\Windows\system32\cmd.exe
  cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp70CD.tmp.bat""
  2⤵
  - Deletes itself
  - Suspicious use of WriteProcessMemory
  PID:3064
- - C:\Windows\system32\timeout.exe
    timeout 3
    3⤵
    - Delays execution with timeout.exe
    PID:1896

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

Loading Replay Monitor...

Downloads

C:\Users\Admin\AppData\Local\Temp\tmp70CD.tmp.bat

Filesize
163B

MD5
66f4bc00c74e2b073504ea155e75ab77

SHA1
7a7cc1c4d69eaecb544ad84bebb7cd7856966e60

SHA256
d981b6505900975a0fad2910d15edb6214074b09f1367b826c0ade040fa25c58

SHA512
1f8925403a12340d7124f0bd6dc16524be00c0cd583921d7f7e032866fe538e7af521658aed37801b6320ea8cb1204eb79c353edf63434d39990ddd5387c9577

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\IBQ2PFDXMW4WSBHZ6BDU.temp

Filesize
7KB

MD5
91aa536ba0cfd978be4e8b936e0d18a1

SHA1
8c894189a1717d591924e1135c5401de0907a60c

SHA256
1ede21328c8af947f0465027fcd17b8c66ff1a46567bb9165b88061e3597c78a

SHA512
9661a612336a6ecaee05ab6f3de70a53877b2e3821bdcda1c95a33574fe64e9dd0bf7de0d8e2e2fa7713c658b92f6e60557e511bd2f8bc745d8770e40c6c3d7a

Download Submit
memory/1732-31-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/1732-2-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/1732-0-0x000007FEF55E3000-0x000007FEF55E4000-memory.dmp

Filesize
4KB

Download
memory/1732-32-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/1732-1-0x0000000001290000-0x00000000012A0000-memory.dmp

Filesize
64KB

Download
memory/1732-44-0x000007FEF55E0000-0x000007FEF5FCC000-memory.dmp

Filesize
9.9MB

Download
memory/2696-9-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2696-8-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2696-7-0x0000000002C30000-0x0000000002CB0000-memory.dmp

Filesize
512KB

Download
memory/2784-16-0x0000000001F70000-0x0000000001F78000-memory.dmp

Filesize
32KB

Download
memory/2784-15-0x000000001B770000-0x000000001BA52000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads