xworm | ec984efbcc8915ef4e2f9decbd844b9a75a1443b78616d750d1e6a4f5a405cec

Analysis

max time kernel
15s
max time network
28s
platform
windows10-1703_x64
resource
win10-20230220-en
resource tags

arch:x64arch:x86image:win10-20230220-enlocale:en-usos:windows10-1703-x64system
submitted
22-03-2023 22:43

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General

Target

XClient.exe
Size

69KB
MD5

1b6c19ea6b874a27d9cb23e8c722320b
SHA1

9c01c24bd4a23cd6ad1f83701d58e09d81800321
SHA256

ec984efbcc8915ef4e2f9decbd844b9a75a1443b78616d750d1e6a4f5a405cec
SHA512

75a81d34bc2b63d5251b2e40f1cbd1d4ae1cb63ef7f7204a9d1213aef9104dd2c22704d7e7e3bcce00313a99047337a8ba972f5de171622f68c6212801ccbcfd
SSDEEP

1536:Yz0yMVnhj0hmwxGz2bp/XUkgev6nLE4TOOcqwH0p:YzqYhO6b5krev+E4TOOLwUp

Score

10^/10

xworm persistence rat trojan

Malware Config

Signatures

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

T1060

Modify Registry

T1112

Processes:

XClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-640001698-3754512395-3275565439-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\AppData\\Roaming\\XClient.exe"	XClient.exe

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

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 1 IoCs

Processes:

XClient.exe

pid process

2004 XClient.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

XClient.exe

description pid process

Token: SeDebugPrivilege 2004 XClient.exe
Token: SeDebugPrivilege 2004 XClient.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

XClient.exe

pid process

2004 XClient.exe

flow	ioc
1	ip-api.com

pid	process
2004	XClient.exe

description	pid	process
Token: SeDebugPrivilege	2004	XClient.exe
Token: SeDebugPrivilege	2004	XClient.exe

pid	process
2004	XClient.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
PID:2004

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Replay Monitor

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Downloads

memory/2004-121-0x0000000000550000-0x0000000000568000-memory.dmp

Filesize
96KB

Download
memory/2004-122-0x000000001B4F0000-0x000000001B500000-memory.dmp

Filesize
64KB

Download
memory/2004-126-0x000000001B4F0000-0x000000001B500000-memory.dmp

Filesize
64KB

Download