xworm | 60b290310f67adb0ae186b4b938ca466a6b55653b2519261fa425127f5500a1f

max time kernel
149s
max time network
158s
platform
windows10-2004_x64
resource
win10v2004-20240802-en
resource tags

arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
submitted
03/09/2024, 13:51

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General

Target
RAT/XClient.exe
Size 172KB
Sample240903-q59avszclf
SHA256 75a8719e83e4aecbe51287d7bfaf1e334fa190c7784324f24bcf61ab984de20a
MD5 75ba783757c5b61bd841afa136fc3eda
SHA1 8db9cda9508471a23f9b743027fa115e01bc1fe1
SHA512 9a6cfbf4302336662527837bf60b30b458f8d438bd6e9563093d4948bf81c79d56578e965d836e90aafde553d1cdc9c6df81a254aafcfb3379fbe6405dce0ea1
SSDEEP 1536:vJcr5kCyoAp30kaF6CiJzt7UbjFdZe8e6TOAJkU7JsOpysa7iAMI:BcmNNxda6zZUbjHZe8jO6H2OpYuAf
MD5 SHA1 SHA512 SSDEEP

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
behavioral8/memory/4640-1-0x0000000000F80000-0x0000000000FB0000-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
2708	powershell.exe
4872	powershell.exe
4504	powershell.exe
5116	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-1-5-21-523280732-2327480845-3730041215-1000\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-1-5-21-523280732-2327480845-3730041215-1000\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
16	pastebin.com
17	pastebin.com
21	7.tcp.eu.ngrok.io
48	7.tcp.eu.ngrok.io
60	7.tcp.eu.ngrok.io

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
2708	powershell.exe
2708	powershell.exe
4872	powershell.exe
4872	powershell.exe
4504	powershell.exe
4504	powershell.exe
5116	powershell.exe
5116	powershell.exe
4640	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

description	pid	Process
Token: SeDebugPrivilege	4640	XClient.exe
Token: SeDebugPrivilege	2708	powershell.exe
Token: SeDebugPrivilege	4872	powershell.exe
Token: SeDebugPrivilege	4504	powershell.exe
Token: SeDebugPrivilege	5116	powershell.exe
Token: SeDebugPrivilege	4640	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4640	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

description	pid	Process	procid_target
PID 4640 wrote to memory of 2708	4640	XClient.exe	90
PID 4640 wrote to memory of 2708	4640	XClient.exe	90
PID 4640 wrote to memory of 4872	4640	XClient.exe	93
PID 4640 wrote to memory of 4872	4640	XClient.exe	93
PID 4640 wrote to memory of 4504	4640	XClient.exe	95
PID 4640 wrote to memory of 4504	4640	XClient.exe	95
PID 4640 wrote to memory of 5116	4640	XClient.exe	97
PID 4640 wrote to memory of 5116	4640	XClient.exe	97

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:4640
- 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:2708
- 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:4872
- 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:4504
- 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:5116

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

powershell.exe.log

Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Size 2KB
SHA256 84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f
MD5 d85ba6ff808d9e5444a4b369f5bc2730
SHA1 31aa9d96590fff6981b315e0b391b575e4c0804a
SHA512 8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d
MD5 6d3e9c29fe44e90aae6ed30ccf799ca8
SHA1 c7974ef72264bbdf13a2793ccf1aed11bc565dce
SHA512 60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 a5735921fc72189c8bf577f3911486cf031708dc8d6bc764fe3e593c0a053165
MD5 a7cc007980e419d553568a106210549a
SHA1 c03099706b75071f36c3962fcc60a22f197711e0
SHA512 b9aaf29403c467daef80a1ae87478afc33b78f4e1ca16189557011bb83cf9b3e29a0f85c69fa209c45201fb28baca47d31756eee07b79c6312c506e8370f7666
MD5 SHA1 SHA512

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StartupProfileData-NonInteractive

Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Size 944B
SHA256 5ef1421e19fde4bc03cd825dd7d6c0e7863f85fd8f0aa4a4d4f8d555dc7606d1
MD5 ba169f4dcbbf147fe78ef0061a95e83b
SHA1 92a571a6eef49fff666e0f62a3545bcd1cdcda67
SHA512 8d2e5e552210dcda684682538bc964fdd8a8ff5b24cc2cc8af813729f0202191f98eb42d38d2355df17ae620fe401aad6ceaedaed3b112fdacd32485a3a0c07c
MD5 SHA1 SHA512

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__PSScriptPolicyTest_lwtavlts.scp.ps1

Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lwtavlts.scp.ps1
Size 60B
SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
MD5 d17fe0a3f47be24a6453e9ef58c94641
SHA1 6ab83620379fc69f80c0242105ddffd7d98d5d9d
SHA512 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82
MD5 SHA1 SHA512

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memory/2708-13-0x00007FF90C9F0000-0x00007FF90D4B1000-memory.dmp

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memory/2708-14-0x00007FF90C9F0000-0x00007FF90D4B1000-memory.dmp

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memory/2708-15-0x00007FF90C9F0000-0x00007FF90D4B1000-memory.dmp

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memory/2708-18-0x00007FF90C9F0000-0x00007FF90D4B1000-memory.dmp

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memory/2708-12-0x000002D6863E0000-0x000002D686402000-memory.dmp

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memory/4640-0-0x00007FF90C9F3000-0x00007FF90C9F5000-memory.dmp

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memory/4640-2-0x00007FF90C9F0000-0x00007FF90D4B1000-memory.dmp

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memory/4640-1-0x0000000000F80000-0x0000000000FB0000-memory.dmp

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memory/4640-57-0x00007FF90C9F3000-0x00007FF90C9F5000-memory.dmp

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memory/4640-58-0x00007FF90C9F0000-0x00007FF90D4B1000-memory.dmp

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