xworm | e712b1e3a9313d86fce1ca310401f88e8fcda3c2b65ff9633613018bac09012f

General

Target

XClient.exe
Size

72KB
MD5

dab9e10b713779e5a811a1c89ae6252a
SHA1

fea8c8140c6b13fabdb258acb3a646c1a54e36be
SHA256

e712b1e3a9313d86fce1ca310401f88e8fcda3c2b65ff9633613018bac09012f
SHA512

ad6f6b0a0b1ce606964e1fa1ddd3ccef30fa2f90b1af3e57108b7a30aeb43aa02e64b407b519e1463597f4147f639eb1d09d4c0717127da8700d2998929b03fe
SSDEEP

1536:XdqJfIiYkjEj1xFhI6mX1EgjbDhcb6rOFw2Uy:SlYJBjXkNjbDXOFwHy

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

C2

isbn-employee.gl.at.ply.gg:4328

Attributes

Install_directory
%AppData%
install_file
XClient.exe

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral1/memory/4372-1-0x0000000000CA0000-0x0000000000CB8000-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
1740	powershell.exe
1184	powershell.exe
3116	powershell.exe
1040	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2804150937-2146708401-419095071-1000\Control Panel\International\Geo\Nation	XClient.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

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-1-5-21-2804150937-2146708401-419095071-1000\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
13	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 9 IoCs

pid	Process
1184	powershell.exe
1184	powershell.exe
3116	powershell.exe
3116	powershell.exe
1040	powershell.exe
1040	powershell.exe
1740	powershell.exe
1740	powershell.exe
4372	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4372	XClient.exe
Token: SeDebugPrivilege	1184	powershell.exe
Token: SeDebugPrivilege	3116	powershell.exe
Token: SeDebugPrivilege	1040	powershell.exe
Token: SeDebugPrivilege	1740	powershell.exe
Token: SeDebugPrivilege	4372	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4372	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4372 wrote to memory of 1184	4372	XClient.exe	92
PID 4372 wrote to memory of 1184	4372	XClient.exe	92
PID 4372 wrote to memory of 3116	4372	XClient.exe	94
PID 4372 wrote to memory of 3116	4372	XClient.exe	94
PID 4372 wrote to memory of 1040	4372	XClient.exe	96
PID 4372 wrote to memory of 1040	4372	XClient.exe	96
PID 4372 wrote to memory of 1740	4372	XClient.exe	98
PID 4372 wrote to memory of 1740	4372	XClient.exe	98

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- 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:4372
- 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:1184
- 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:3116
- 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'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1040
- 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:1740

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

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
3a6bad9528f8e23fb5c77fbd81fa28e8

SHA1
f127317c3bc6407f536c0f0600dcbcf1aabfba36

SHA256
986366767de5873f1b170a63f2a33ce05132d1afd90c8f5017afbca8ef1beb05

SHA512
846002154a0ece6f3e9feda6f115d3161dc21b3789525dd62ae1d9188495171293efdbe7be4710666dd8a15e66b557315b5a02918a741ed1d5f3ff0c515b98e2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
110b59ca4d00786d0bde151d21865049

SHA1
557e730d93fdf944a0cad874022df1895fb5b2e2

SHA256
77f69011c214ea5a01fd2035d781914c4893aee66d784deadc22179eadfdf77f

SHA512
cb55ac6eca50f4427718bace861679c88b2fdfea94d30209e8d61ca73a6ce9f8c4b5334922d2660a829b0636d20cbdf3bae1497c920e604efe6c636019feb10e

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
46b170302a5821687d8c622f10947f27

SHA1
47a91ea3e248bd99dc87211be7e2844dda0687df

SHA256
e3cdd1b49dca63bf255aead7a7535cc6fc085425ff5ac48975d62c37af6a689e

SHA512
e6f9e562876591cb959d5650cf9ef1eb2a87d5a154bd5f8c37f6697c7fd48d959014bcb2aab96b9c41498a465e9d0f114be276514e2be59dcb019334e3dfe7cb

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lixiqlvz.o4q.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/1184-14-0x00000215A4F30000-0x00000215A4F52000-memory.dmp

Filesize
136KB

Download
memory/1184-17-0x00007FFA19890000-0x00007FFA1A351000-memory.dmp

Filesize
10.8MB

Download
memory/1184-4-0x00007FFA19890000-0x00007FFA1A351000-memory.dmp

Filesize
10.8MB

Download
memory/1184-3-0x00007FFA19890000-0x00007FFA1A351000-memory.dmp

Filesize
10.8MB

Download
memory/4372-0-0x00007FFA19893000-0x00007FFA19895000-memory.dmp

Filesize
8KB

Download
memory/4372-2-0x00007FFA19890000-0x00007FFA1A351000-memory.dmp

Filesize
10.8MB

Download
memory/4372-1-0x0000000000CA0000-0x0000000000CB8000-memory.dmp

Filesize
96KB

Download
memory/4372-56-0x00007FFA19893000-0x00007FFA19895000-memory.dmp

Filesize
8KB

Download
memory/4372-57-0x00007FFA19890000-0x00007FFA1A351000-memory.dmp

Filesize
10.8MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads