xworm | 3c4947c30053221ba3947e03eec50eda97a6119aa0fb5a435d73e417744193f3

General

Target

XClient.exe
Size

237KB
MD5

50f059bf53d9b59728eeb0bdecdf40e7
SHA1

892d6c2bc4efeee06c747d0cf3dd5f26a087398b
SHA256

3c4947c30053221ba3947e03eec50eda97a6119aa0fb5a435d73e417744193f3
SHA512

b5dcf35a0c26d20f62d46e88af8431a90d474ce3e0ce70716a1c0b0b7d87190a2dc74fadeca2ae6952aad85e6bf61c7336351e0d09ffbaaf02e36b25361c2331
SSDEEP

3072:azrtwZdQ+bhHvnOPebcEm8SKfbzxcwg7es6/Vsb8VKTu549oJMfF/H9N3Ky9NzLP:CwvxbDmUhcX7elbKTua9bfF/H9d9n

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

november-cope.gl.at.ply.gg:37025

Attributes

Install_directory
%ProgramData%
install_file
update.exe

Signatures

Detect Xworm Payload 4 IoCs

resource	yara_rule
behavioral1/memory/2120-1-0x0000000000EC0000-0x0000000000F00000-memory.dmp	family_xworm
behavioral1/files/0x0036000000016d64-35.dat	family_xworm
behavioral1/memory/2172-37-0x0000000000F70000-0x0000000000FB0000-memory.dmp	family_xworm
behavioral1/memory/988-40-0x0000000000150000-0x0000000000190000-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
2816	powershell.exe
2828	powershell.exe
2568	powershell.exe
3024	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	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\update.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
2172	update.exe
988	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-1-5-21-2872745919-2748461613-2989606286-1000\Software\Microsoft\Windows\CurrentVersion\Run\update = "C:\\ProgramData\\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
2360	schtasks.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2816	powershell.exe
2828	powershell.exe
2568	powershell.exe
3024	powershell.exe
2120	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	2120	XClient.exe
Token: SeDebugPrivilege	2816	powershell.exe
Token: SeDebugPrivilege	2828	powershell.exe
Token: SeDebugPrivilege	2568	powershell.exe
Token: SeDebugPrivilege	3024	powershell.exe
Token: SeDebugPrivilege	2120	XClient.exe
Token: SeDebugPrivilege	2172	update.exe
Token: SeDebugPrivilege	988	update.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2120	XClient.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 2120 wrote to memory of 2816	2120	XClient.exe	30
PID 2120 wrote to memory of 2816	2120	XClient.exe	30
PID 2120 wrote to memory of 2816	2120	XClient.exe	30
PID 2120 wrote to memory of 2828	2120	XClient.exe	32
PID 2120 wrote to memory of 2828	2120	XClient.exe	32
PID 2120 wrote to memory of 2828	2120	XClient.exe	32
PID 2120 wrote to memory of 2568	2120	XClient.exe	34
PID 2120 wrote to memory of 2568	2120	XClient.exe	34
PID 2120 wrote to memory of 2568	2120	XClient.exe	34
PID 2120 wrote to memory of 3024	2120	XClient.exe	36
PID 2120 wrote to memory of 3024	2120	XClient.exe	36
PID 2120 wrote to memory of 3024	2120	XClient.exe	36
PID 2120 wrote to memory of 2360	2120	XClient.exe	38
PID 2120 wrote to memory of 2360	2120	XClient.exe	38
PID 2120 wrote to memory of 2360	2120	XClient.exe	38
PID 2352 wrote to memory of 2172	2352	taskeng.exe	42
PID 2352 wrote to memory of 2172	2352	taskeng.exe	42
PID 2352 wrote to memory of 2172	2352	taskeng.exe	42
PID 2352 wrote to memory of 988	2352	taskeng.exe	44
PID 2352 wrote to memory of 988	2352	taskeng.exe	44
PID 2352 wrote to memory of 988	2352	taskeng.exe	44

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:2120
- 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:2816
- 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:2828
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\ProgramData\update.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2568
- 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:3024
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "update" /tr "C:\ProgramData\update.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:2360

C:\Windows\system32\taskeng.exe
taskeng.exe {FB435B51-BBA0-4B31-BFD9-CB164A249C51} S-1-5-21-2872745919-2748461613-2989606286-1000:CCJBVTGQ\Admin:Interactive:[1]
1⤵
- Suspicious use of WriteProcessMemory
PID:2352
- C:\ProgramData\update.exe
  C:\ProgramData\update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:2172
- C:\ProgramData\update.exe
  C:\ProgramData\update.exe
  2⤵
  - Executes dropped EXE
  - Suspicious use of AdjustPrivilegeToken
  PID:988

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

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Downloads

C:\ProgramData\update.exe

Filesize
237KB

MD5
50f059bf53d9b59728eeb0bdecdf40e7

SHA1
892d6c2bc4efeee06c747d0cf3dd5f26a087398b

SHA256
3c4947c30053221ba3947e03eec50eda97a6119aa0fb5a435d73e417744193f3

SHA512
b5dcf35a0c26d20f62d46e88af8431a90d474ce3e0ce70716a1c0b0b7d87190a2dc74fadeca2ae6952aad85e6bf61c7336351e0d09ffbaaf02e36b25361c2331

Download Submit
C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms

Filesize
7KB

MD5
d76301d0177f9c183acf43f19e94aaaf

SHA1
e313808ff1d832f7fa27ce8b9de042061a7c4a22

SHA256
14f8e09edb8bd0dba8cee7959c4c0758d84bdeac6e713aa866d287cbbd173f04

SHA512
b3ec92a7489ed319e7c073974297d0752575d4a64b6f30f847bd4a9a24ece0b559ba67f424d29c307bf72e4d6f319535b7d9c4893e11dada5c2f346e0e81fe77

Download Submit
memory/988-40-0x0000000000150000-0x0000000000190000-memory.dmp

Filesize
256KB

Download
memory/2120-32-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

Filesize
4KB

Download
memory/2120-1-0x0000000000EC0000-0x0000000000F00000-memory.dmp

Filesize
256KB

Download
memory/2120-0-0x000007FEF61C3000-0x000007FEF61C4000-memory.dmp

Filesize
4KB

Download
memory/2120-33-0x0000000002400000-0x0000000002480000-memory.dmp

Filesize
512KB

Download
memory/2120-31-0x0000000002400000-0x0000000002480000-memory.dmp

Filesize
512KB

Download
memory/2172-37-0x0000000000F70000-0x0000000000FB0000-memory.dmp

Filesize
256KB

Download
memory/2816-7-0x000000001B620000-0x000000001B902000-memory.dmp

Filesize
2.9MB

Download
memory/2816-8-0x0000000002620000-0x0000000002628000-memory.dmp

Filesize
32KB

Download
memory/2816-6-0x0000000002850000-0x00000000028D0000-memory.dmp

Filesize
512KB

Download
memory/2828-15-0x0000000002290000-0x0000000002298000-memory.dmp

Filesize
32KB

Download
memory/2828-14-0x000000001B6C0000-0x000000001B9A2000-memory.dmp

Filesize
2.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads