xworm | 250faa1e494e594e8faad0cebcd8d2b1d63f9bc5ddfd8ac6f143a98f8ed9980e

General

Target

XClient.exe
Size

153KB
MD5

1b8820d52554249471ca92c6db6d7e73
SHA1

8b72f08f4c07c2011d42bcdb3cb8299ddceaa16b
SHA256

250faa1e494e594e8faad0cebcd8d2b1d63f9bc5ddfd8ac6f143a98f8ed9980e
SHA512

bfd0864ca829913b66739fe3194e606e7795e8a55ec1da57b79f273f318795d9d41bd6881e5f9e418d4a1fc7481a64ed5728f171a956ebaa2aeb6aaa43208df3
SSDEEP

1536:6UEv+qFIUkzEabbECePsbgoggTLcGu4f069liHbOBPBbyVspJxqmyVttdGFQeOPu:mHpkzFbwCekbgL2+OBPBmVIrqmyBer

Score

10^/10

xworm persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/PG3MaVGP

Signatures

Detect Xworm Payload 1 IoCs

Processes:

resource	yara_rule
behavioral1/memory/1632-0-0x00000000000A0000-0x00000000000CC000-memory.dmp	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm

Drops startup file 2 IoCs

Processes:

XClient.exe

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 1 IoCs

Processes:

wzbyhb.exe

pid process

2356 wzbyhb.exe

pid	process
2356	wzbyhb.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1298544033-3225604241-2703760938-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs

Web Service
T1102

Processes:

flow ioc

6 pastebin.com
7 pastebin.com
Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid process

2636 powershell.exe
2724 powershell.exe
2616 powershell.exe
3004 powershell.exe
1632 XClient.exe

flow	ioc
6	pastebin.com
7	pastebin.com

flow	ioc
4	ip-api.com

pid	process
2636	powershell.exe
2724	powershell.exe
2616	powershell.exe
3004	powershell.exe
1632	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	1632	XClient.exe
Token: SeDebugPrivilege	2636	powershell.exe
Token: SeDebugPrivilege	2724	powershell.exe
Token: SeDebugPrivilege	2616	powershell.exe
Token: SeDebugPrivilege	3004	powershell.exe
Token: SeDebugPrivilege	1632	XClient.exe

Suspicious use of FindShellTrayWindow 1 IoCs

Processes:

wzbyhb.exe

pid process

2356 wzbyhb.exe
Suspicious use of SendNotifyMessage 1 IoCs

Processes:

wzbyhb.exe

pid process

2356 wzbyhb.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

1632 XClient.exe

pid	process
2356	wzbyhb.exe

pid	process
2356	wzbyhb.exe

pid	process
1632	XClient.exe

Suspicious use of WriteProcessMemory 16 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 1632 wrote to memory of 2636	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2636	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2636	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2724	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2724	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2724	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2616	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2616	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2616	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 3004	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 3004	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 3004	1632	XClient.exe	powershell.exe
PID 1632 wrote to memory of 2356	1632	XClient.exe	wzbyhb.exe
PID 1632 wrote to memory of 2356	1632	XClient.exe	wzbyhb.exe
PID 1632 wrote to memory of 2356	1632	XClient.exe	wzbyhb.exe
PID 1632 wrote to memory of 2356	1632	XClient.exe	wzbyhb.exe

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:1632
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2636
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2724
- 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⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2616
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3004
- C:\Users\Admin\AppData\Local\Temp\wzbyhb.exe
  "C:\Users\Admin\AppData\Local\Temp\wzbyhb.exe"
  2⤵
  - Executes dropped EXE
  - Suspicious use of FindShellTrayWindow
  - Suspicious use of SendNotifyMessage
  PID:2356

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

Web Service

1

T1102

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\wzbyhb.exe

Filesize
1.0MB

MD5
ae250258012727720a7be047f3a551bb

SHA1
a605d60d81c6002c8a67c8770c6a7133a281359c

SHA256
75cca561fd994676c8925dc592a324739c15e834deae2e0c26cd09519c2f84d7

SHA512
9c3e2e449270a74be1af746752946c77dcdff677f4d38767f4eac65b292dca18d5e6935e2c134e625d762af7dd7e3a35ba01ade3c34cc9ae1c66e28d6506ad62

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

Filesize
7KB

MD5
db3e2c77f5b88bcc05c8998e93203c58

SHA1
47708ac90a9cbb8451b95c0c640dfbfa7717b350

SHA256
90f10ea764fe84f5cb0e6f8067cea135e00bb0f53008c3dc872e036738d322a9

SHA512
082ae97fd6c1b5a1e096e82cce98c07bf2dd255bc34371057266c32997a284874c69f00a7e695fcc5ec50869d561b65e4903449996b175203608d9be31305cdf

Download Submit
memory/1632-30-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/1632-1-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

Filesize
9.9MB

Download
memory/1632-2-0x000000001B110000-0x000000001B190000-memory.dmp

Filesize
512KB

Download
memory/1632-0-0x00000000000A0000-0x00000000000CC000-memory.dmp

Filesize
176KB

Download
memory/2356-41-0x0000000000400000-0x00000000004FE000-memory.dmp

Filesize
1016KB

Download
memory/2356-39-0x0000000000400000-0x00000000004FE000-memory.dmp

Filesize
1016KB

Download
memory/2356-40-0x0000000000400000-0x00000000004FE000-memory.dmp

Filesize
1016KB

Download
memory/2356-42-0x0000000000400000-0x00000000004FE000-memory.dmp

Filesize
1016KB

Download
memory/2356-43-0x0000000000400000-0x00000000004FE000-memory.dmp

Filesize
1016KB

Download
memory/2356-44-0x0000000000400000-0x00000000004FE000-memory.dmp

Filesize
1016KB

Download
memory/2356-45-0x0000000000400000-0x00000000004FE000-memory.dmp

Filesize
1016KB

Download
memory/2636-8-0x0000000001E70000-0x0000000001E78000-memory.dmp

Filesize
32KB

Download
memory/2636-7-0x000000001B670000-0x000000001B952000-memory.dmp

Filesize
2.9MB

Download
memory/2724-15-0x0000000002390000-0x0000000002398000-memory.dmp

Filesize
32KB

Download
memory/2724-14-0x000000001B670000-0x000000001B952000-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