xworm | 64c665b2dbdaca4a20aaef96d625091757008c88b49d71070e4eefcd45d986d8

Resubmissions

10-05-2024 17:13

240510-vrrk4sgd7t 10

10-05-2024 17:09

240510-vphv7abd29 10

Analysis

max time kernel
59s
max time network
67s
platform
windows10-2004_x64
resource
win10v2004-20240426-en
resource tags

arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
submitted
10-05-2024 17:09

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General

Target

High Priority/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

Processes:

resource yara_rule

behavioral8/memory/2496-1-0x0000000000790000-0x00000000007C0000-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

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

720 powershell.exe
4896 powershell.exe
800 powershell.exe
3348 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

Processes:

XClient.exe

description ioc process

Key value queried \REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation XClient.exe

resource	yara_rule
behavioral8/memory/2496-1-0x0000000000790000-0x00000000007C0000-memory.dmp	family_xworm

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

Processes:

XClient.exe

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

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1162180587-977231257-2194346871-1000\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 3 IoCs

Web Service
T1102

Processes:

flow ioc

29 pastebin.com
30 pastebin.com
37 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.

Processes:

flow ioc

24 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

flow	ioc
29	pastebin.com
30	pastebin.com
37	7.tcp.eu.ngrok.io

flow	ioc
24	ip-api.com

Suspicious behavior: EnumeratesProcesses 12 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exeXClient.exe

pid	process
720	powershell.exe
720	powershell.exe
720	powershell.exe
4896	powershell.exe
4896	powershell.exe
4896	powershell.exe
800	powershell.exe
800	powershell.exe
800	powershell.exe
3348	powershell.exe
3348	powershell.exe
2496	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2496	XClient.exe
Token: SeDebugPrivilege	720	powershell.exe
Token: SeDebugPrivilege	4896	powershell.exe
Token: SeDebugPrivilege	800	powershell.exe
Token: SeDebugPrivilege	3348	powershell.exe
Token: SeDebugPrivilege	2496	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

2496 XClient.exe

pid	process
2496	XClient.exe

Suspicious use of WriteProcessMemory 8 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 2496 wrote to memory of 720	2496	XClient.exe	powershell.exe
PID 2496 wrote to memory of 720	2496	XClient.exe	powershell.exe
PID 2496 wrote to memory of 4896	2496	XClient.exe	powershell.exe
PID 2496 wrote to memory of 4896	2496	XClient.exe	powershell.exe
PID 2496 wrote to memory of 800	2496	XClient.exe	powershell.exe
PID 2496 wrote to memory of 800	2496	XClient.exe	powershell.exe
PID 2496 wrote to memory of 3348	2496	XClient.exe	powershell.exe
PID 2496 wrote to memory of 3348	2496	XClient.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\High Priority\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\High Priority\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:2496

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\High Priority\XClient.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:720

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:4896

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:800

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:3348

Network

MITRE ATT&CK Matrix ATT&CK v13

Replay Monitor

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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
2e907f77659a6601fcc408274894da2e

SHA1
9f5b72abef1cd7145bf37547cdb1b9254b4efe9d

SHA256
385da35673330e21ac02545220552fe301fe54dedefbdafc097ac4342a295233

SHA512
34fa0fff24f6550f55f828541aaefe5d75c86f8f0842d54b50065e9746f9662bb7209c74c9a9571540b9855bb3851f01db613190024e89b198d485bb5dc07721

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
04f1d68afbed6b13399edfae1e9b1472

SHA1
8bfdcb687a995e4a63a8c32df2c66dc89f91a8b0

SHA256
f358f33a42122e97c489fad7bbc8beab2eb42d42e4ec7fce0dd61fe6d8c0b8de

SHA512
30c5e72a8134992094d937d2588f7a503b1d6407d11afe0265b7c8b0ce14071925e5caed13fc4f9c28705df4c7aed3601f81b007048b148af274d7784aa5fb75

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
22310ad6749d8cc38284aa616efcd100

SHA1
440ef4a0a53bfa7c83fe84326a1dff4326dcb515

SHA256
55b1d8021c4eb4c3c0d75e3ed7a4eb30cd0123e3d69f32eeb596fe4ffec05abf

SHA512
2ef08e2ee15bb86695fe0c10533014ffed76ececc6e579d299d3365fafb7627f53e32e600bb6d872b9f58aca94f8cb7e1e94cdfd14777527f7f0aa019d9c6def

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_hzm2k2rq.2v5.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
memory/720-8-0x000001545E930000-0x000001545E952000-memory.dmp

Filesize
136KB

Download
memory/720-14-0x00007FF8C04C0000-0x00007FF8C0F81000-memory.dmp

Filesize
10.8MB

Download
memory/720-15-0x00007FF8C04C0000-0x00007FF8C0F81000-memory.dmp

Filesize
10.8MB

Download
memory/720-18-0x00007FF8C04C0000-0x00007FF8C0F81000-memory.dmp

Filesize
10.8MB

Download
memory/720-13-0x00007FF8C04C0000-0x00007FF8C0F81000-memory.dmp

Filesize
10.8MB

Download
memory/2496-0-0x00007FF8C04C3000-0x00007FF8C04C5000-memory.dmp

Filesize
8KB

Download
memory/2496-2-0x00007FF8C04C0000-0x00007FF8C0F81000-memory.dmp

Filesize
10.8MB

Download
memory/2496-1-0x0000000000790000-0x00000000007C0000-memory.dmp

Filesize
192KB

Download
memory/2496-57-0x00007FF8C04C3000-0x00007FF8C04C5000-memory.dmp

Filesize
8KB

Download
memory/2496-58-0x00007FF8C04C0000-0x00007FF8C0F81000-memory.dmp

Filesize
10.8MB

Download