xworm | 3b9fd41558768c9ed809fdf54e199c260dc3ac39ea8320184f484890915fc457

General

Target

XClient.exe
Size

76KB
MD5

087b0c45aea1a937a396b5bb9dc02198
SHA1

1ccfa0318bd0cfe44b4bca3eeda92cb79c86f39f
SHA256

3b9fd41558768c9ed809fdf54e199c260dc3ac39ea8320184f484890915fc457
SHA512

42d5be800a60e95f15680682aac89d08fc86d04ecb579d89103559f720c2a40faa5a7d6416ed484c75a90e6be6ccc180758bca0727905c6f239273526fbfd9ff
SSDEEP

1536:ARCMExLHBP2ANHPxU+NGbFUi4esGTnlnr6CiJoBKOYm3u:qCMEvXBPxU+AbFUSQOYYu

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

89.213.177.81:7000

Attributes

Install_directory
%Public%
install_file
idk.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/1936-1-0x0000000001330000-0x000000000134A000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat 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
2668	powershell.exe
2532	powershell.exe
2756	powershell.exe
2628	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\idk.lnk	XClient.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\idk.lnk	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-1-5-21-3502430532-24693940-2469786940-1000\Software\Microsoft\Windows\CurrentVersion\Run\idk = "C:\\Users\\Public\\idk.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

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2532	powershell.exe
2756	powershell.exe
2628	powershell.exe
2668	powershell.exe
1936	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	1936	XClient.exe
Token: SeDebugPrivilege	2532	powershell.exe
Token: SeDebugPrivilege	2756	powershell.exe
Token: SeDebugPrivilege	2628	powershell.exe
Token: SeDebugPrivilege	2668	powershell.exe
Token: SeDebugPrivilege	1936	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1936	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

description	pid	Process	procid_target
PID 1936 wrote to memory of 2532	1936	XClient.exe	31
PID 1936 wrote to memory of 2532	1936	XClient.exe	31
PID 1936 wrote to memory of 2532	1936	XClient.exe	31
PID 1936 wrote to memory of 2756	1936	XClient.exe	33
PID 1936 wrote to memory of 2756	1936	XClient.exe	33
PID 1936 wrote to memory of 2756	1936	XClient.exe	33
PID 1936 wrote to memory of 2628	1936	XClient.exe	35
PID 1936 wrote to memory of 2628	1936	XClient.exe	35
PID 1936 wrote to memory of 2628	1936	XClient.exe	35
PID 1936 wrote to memory of 2668	1936	XClient.exe	37
PID 1936 wrote to memory of 2668	1936	XClient.exe	37
PID 1936 wrote to memory of 2668	1936	XClient.exe	37

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:1936
- 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:2532
- 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:2756
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Public\idk.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2628
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'idk.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2668

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

System Information Discovery

1

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\HMCGZUW7R421A3DY4JAV.temp

Filesize
7KB

MD5
ee416a3aad84f52d7015f51da264e0bd

SHA1
645a815a1a0b0d477fd7ecf3367c96ca5b0e2591

SHA256
c5fa6c7ca22006ec88fa35beb75422873a69448fd7f8cdfb2d51f274a7200591

SHA512
8c53f63222519849496990ed8bf0a4642f3da8014b7b85cb9c0343b54cc31f10bf60ddfe91e53d4d3d2e0f70f21361612f5694128e165b4e93da6ce0d6110091

Download Submit
memory/1936-0-0x000007FEF67B3000-0x000007FEF67B4000-memory.dmp

Filesize
4KB

Download
memory/1936-1-0x0000000001330000-0x000000000134A000-memory.dmp

Filesize
104KB

Download
memory/1936-2-0x000007FEF67B0000-0x000007FEF719C000-memory.dmp

Filesize
9.9MB

Download
memory/1936-32-0x000007FEF67B3000-0x000007FEF67B4000-memory.dmp

Filesize
4KB

Download
memory/1936-33-0x000007FEF67B0000-0x000007FEF719C000-memory.dmp

Filesize
9.9MB

Download
memory/2532-7-0x00000000029B0000-0x0000000002A30000-memory.dmp

Filesize
512KB

Download
memory/2532-8-0x000000001B590000-0x000000001B872000-memory.dmp

Filesize
2.9MB

Download
memory/2532-9-0x0000000002960000-0x0000000002968000-memory.dmp

Filesize
32KB

Download
memory/2756-15-0x000000001B650000-0x000000001B932000-memory.dmp

Filesize
2.9MB

Download
memory/2756-16-0x0000000001D10000-0x0000000001D18000-memory.dmp

Filesize
32KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads