xworm | 60b290310f67adb0ae186b4b938ca466a6b55653b2519261fa425127f5500a1f

max time kernel
146s
max time network
153s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
10/05/2024, 17:48

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General

Target

RAT/XClient.exe
Size

172KB
MD5

75ba783757c5b61bd841afa136fc3eda
SHA1

8db9cda9508471a23f9b743027fa115e01bc1fe1
SHA256

75a8719e83e4aecbe51287d7bfaf1e334fa190c7784324f24bcf61ab984de20a
SHA512

9a6cfbf4302336662527837bf60b30b458f8d438bd6e9563093d4948bf81c79d56578e965d836e90aafde553d1cdc9c6df81a254aafcfb3379fbe6405dce0ea1
SSDEEP

1536:vJcr5kCyoAp30kaF6CiJzt7UbjFdZe8e6TOAJkU7JsOpysa7iAMI:BcmNNxda6zZUbjHZe8jO6H2OpYuAf

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Attributes

Install_directory
%AppData%
install_file
XClient.exe
pastebin_url
https://pastebin.com/raw/2jTT3Lnj

Signatures

Detect Xworm Payload 1 IoCs

resource	yara_rule
behavioral4/memory/3308-1-0x0000000000B30000-0x0000000000B60000-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
3044	powershell.exe
5020	powershell.exe
4392	powershell.exe
1000	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-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk	XClient.exe
File created	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-1-5-21-3558294865-3673844354-2255444939-1000\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 5 IoCs

Web Service

T1102

flow	ioc
19	pastebin.com
21	7.tcp.eu.ngrok.io
45	7.tcp.eu.ngrok.io
59	7.tcp.eu.ngrok.io
18	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.

flow	ioc
15	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
4392	powershell.exe
4392	powershell.exe
1000	powershell.exe
1000	powershell.exe
3044	powershell.exe
3044	powershell.exe
5020	powershell.exe
5020	powershell.exe
3308	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	3308	XClient.exe
Token: SeDebugPrivilege	4392	powershell.exe
Token: SeDebugPrivilege	1000	powershell.exe
Token: SeDebugPrivilege	3044	powershell.exe
Token: SeDebugPrivilege	5020	powershell.exe
Token: SeDebugPrivilege	3308	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3308	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 3308 wrote to memory of 4392	3308	XClient.exe	88
PID 3308 wrote to memory of 4392	3308	XClient.exe	88
PID 3308 wrote to memory of 1000	3308	XClient.exe	90
PID 3308 wrote to memory of 1000	3308	XClient.exe	90
PID 3308 wrote to memory of 3044	3308	XClient.exe	92
PID 3308 wrote to memory of 3044	3308	XClient.exe	92
PID 3308 wrote to memory of 5020	3308	XClient.exe	94
PID 3308 wrote to memory of 5020	3308	XClient.exe	94

C:\Users\Admin\AppData\Local\Temp\RAT\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\RAT\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:3308
- 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\RAT\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4392
- 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:1000
- 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:3044
- 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:5020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Query Registry

T1012

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Web Service

T1102

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
17fbfbe3f04595e251287a6bfcdc35de

SHA1
b576aabfd5e6d5799d487011506ed1ae70688987

SHA256
2e61ae727ca01496c9418a65777d6d7e05a85cbdb6b3a19516857442e5bd2da0

SHA512
449c68512d90a17f598e9dacfd6230e6e97bc6bfaaf2b06f3b91b370ece92e2322b81ee3721e288880fa1f05470156e519256e3f03d786c3b28a39788f5e0ad6

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

Filesize
944B

MD5
332a4fdd64b0fa8ecf744911a8b08be8

SHA1
3a7781ac60ae0b394e3414b3ea8a4826b5ca1bcf

SHA256
fd64aeb8f4afcb1e97980ba1f38435febebe522da159d08ce16c765e9bdcd308

SHA512
aa796479db62e37193c2f127c7b27a8fb89bd95fe920d751b129eaf157fb6e0be1e6ff7190241a733ce5e70b00b8e89956589bd32274ae07c5590071cfe45191

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

Filesize
944B

MD5
e58749a7a1826f6ea62df1e2ef63a32b

SHA1
c0bca21658b8be4f37b71eec9578bfefa44f862d

SHA256
0e1f0e684adb40a5d0668df5fed007c9046137d7ae16a1f2f343b139d5f9bc93

SHA512
4cf45b2b11ab31e7f67fff286b29d50ed28cd6043091144c5c0f1348b5f5916ed7479cf985595e6f096b586ab93b4b5dce612f688049b8366a2dd91863e98b70

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_pmorgona.hw4.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/3308-0-0x00007FF8AE9F3000-0x00007FF8AE9F5000-memory.dmp

Filesize
8KB

Download
memory/3308-2-0x00007FF8AE9F0000-0x00007FF8AF4B1000-memory.dmp

Filesize
10.8MB

Download
memory/3308-1-0x0000000000B30000-0x0000000000B60000-memory.dmp

Filesize
192KB

Download
memory/3308-57-0x00007FF8AE9F3000-0x00007FF8AE9F5000-memory.dmp

Filesize
8KB

Download
memory/3308-58-0x00007FF8AE9F0000-0x00007FF8AF4B1000-memory.dmp

Filesize
10.8MB

Download
memory/4392-13-0x00007FF8AE9F0000-0x00007FF8AF4B1000-memory.dmp

Filesize
10.8MB

Download
memory/4392-15-0x00007FF8AE9F0000-0x00007FF8AF4B1000-memory.dmp

Filesize
10.8MB

Download
memory/4392-18-0x00007FF8AE9F0000-0x00007FF8AF4B1000-memory.dmp

Filesize
10.8MB

Download
memory/4392-14-0x0000028420920000-0x0000028420942000-memory.dmp

Filesize
136KB

Download
memory/4392-3-0x00007FF8AE9F0000-0x00007FF8AF4B1000-memory.dmp

Filesize
10.8MB

Download