xworm | ae045f8e36db8f38af35258127ff43a71d522ae6ad15b7aad527bf75dd7a7666

Analysis

max time kernel
150s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20230220-en
resource tags

arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
submitted
23-03-2023 10:14

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General

Target

LbsClient.exe
Size

63KB
MD5

762f2fc17465058d27010124bb425202
SHA1

1b6b701c9c09128886e4676c4f1e534c7db39ad9
SHA256

ae045f8e36db8f38af35258127ff43a71d522ae6ad15b7aad527bf75dd7a7666
SHA512

329eacc85396f176fb30989f8d85fbeea097388ab37edecf22c3f4f368c1b0b0106cc7ec5c5ad06abbe488868ce4a5731ab04e4e7852a3d37bb1bdc42bb4e932
SSDEEP

768:8FfQVS7rGOe01ZDKMFiw7qyignMEOoCenkHubK23vuEBXKZ7ifudOPJhsAjDOep:Yfo/mKM1qrgnqebKivpaV0udOR3us

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:

LbsClient.exe

description	ioc	process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\LbsClient.lnk	LbsClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\LbsClient.lnk	LbsClient.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

LbsClient.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-1675742406-747946869-1029867430-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\LbsClient = "C:\\Users\\Admin\\AppData\\Roaming\\LbsClient.exe"	LbsClient.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

11 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:

LbsClient.exe

pid process

2928 LbsClient.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

LbsClient.exe

description pid process

Token: SeDebugPrivilege 2928 LbsClient.exe
Token: SeDebugPrivilege 2928 LbsClient.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

LbsClient.exe

pid process

2928 LbsClient.exe

flow	ioc
11	ip-api.com

pid	process
2928	LbsClient.exe

description	pid	process
Token: SeDebugPrivilege	2928	LbsClient.exe
Token: SeDebugPrivilege	2928	LbsClient.exe

pid	process
2928	LbsClient.exe

C:\Users\Admin\AppData\Local\Temp\LbsClient.exe
"C:\Users\Admin\AppData\Local\Temp\LbsClient.exe"
1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:2928

Network

MITRE ATT&CK Enterprise 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

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

memory/2928-133-0x0000000000140000-0x0000000000156000-memory.dmp

Filesize
88KB

Download
memory/2928-134-0x000000001C3B0000-0x000000001C3C0000-memory.dmp

Filesize
64KB

Download
memory/2928-141-0x000000001C9C0000-0x000000001CAC2000-memory.dmp

Filesize
1.0MB

Download
memory/2928-142-0x0000000000900000-0x000000000093B000-memory.dmp

Filesize
236KB

Download
memory/2928-143-0x000000001C3B0000-0x000000001C3C0000-memory.dmp

Filesize
64KB

Download