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/2908-0-0x0000000000940000-0x000000000096C000-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

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-1-5-21-2721934792-624042501-2768869379-1000\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

2548 powershell.exe
2728 powershell.exe
2444 powershell.exe
1564 powershell.exe
2908 XClient.exe

flow	ioc
6	pastebin.com
7	pastebin.com

flow	ioc
4	ip-api.com

pid	process
2548	powershell.exe
2728	powershell.exe
2444	powershell.exe
1564	powershell.exe
2908	XClient.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

XClient.exepowershell.exepowershell.exepowershell.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	2908	XClient.exe
Token: SeDebugPrivilege	2548	powershell.exe
Token: SeDebugPrivilege	2728	powershell.exe
Token: SeDebugPrivilege	2444	powershell.exe
Token: SeDebugPrivilege	1564	powershell.exe
Token: SeDebugPrivilege	2908	XClient.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

2908 XClient.exe

pid	process
2908	XClient.exe

Suspicious use of WriteProcessMemory 12 IoCs

Processes:

XClient.exe

description	pid	process	target process
PID 2908 wrote to memory of 2548	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 2548	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 2548	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 2728	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 2728	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 2728	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 2444	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 2444	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 2444	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 1564	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 1564	2908	XClient.exe	powershell.exe
PID 2908 wrote to memory of 1564	2908	XClient.exe	powershell.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:2908

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:2548

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:2728

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:2444

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:1564

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\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
Filesize
7KB

MD5
9bc990138278f73fff453532b30966c4

SHA1
45ed2062f54b0a40ead4d282f5e7de286a4beead

SHA256
d0bfbf464bff0192a1771c47b45be3e79fec0764da2c240b574aeafdd1a03c37

SHA512
f2ea6924e3ad1e9ff541b1b3b0eb4464ce8921e65f821f6e1da56c2c5e981d80c443cb5c5d615dcba6954deae177c76bc878692f25b2d227193c0d3b19c365c7

Download Submit
\??\PIPE\srvsvc
MD5
d41d8cd98f00b204e9800998ecf8427e

SHA1
da39a3ee5e6b4b0d3255bfef95601890afd80709

SHA256
e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

SHA512
cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

Download Submit
memory/2548-7-0x0000000002D20000-0x0000000002DA0000-memory.dmp

Filesize
512KB

Download
memory/2548-8-0x000000001B640000-0x000000001B922000-memory.dmp

Filesize
2.9MB

Download
memory/2548-9-0x0000000002240000-0x0000000002248000-memory.dmp

Filesize
32KB

Download
memory/2728-15-0x000000001B5A0000-0x000000001B882000-memory.dmp

Filesize
2.9MB

Download
memory/2728-16-0x0000000002790000-0x0000000002798000-memory.dmp

Filesize
32KB

Download
memory/2908-0-0x0000000000940000-0x000000000096C000-memory.dmp

Filesize
176KB

Download
memory/2908-1-0x000007FEF5910000-0x000007FEF62FC000-memory.dmp

Filesize
9.9MB

Download
memory/2908-2-0x000000001B250000-0x000000001B2D0000-memory.dmp

Filesize
512KB

Download
memory/2908-32-0x000007FEF5910000-0x000007FEF62FC000-memory.dmp

Filesize
9.9MB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads