Malware Analysis Report

2024-11-16 13:41

Sample ID 240531-wtf3tshb34
Target XClient.exe
SHA256 931d6f0e673591ff11b0f570ef55ce81dc9e463a27916068dbdd4885b9435c83
Tags
xworm persistence rat trojan
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

931d6f0e673591ff11b0f570ef55ce81dc9e463a27916068dbdd4885b9435c83

Threat Level: Known bad

The file XClient.exe was found to be: Known bad.

Malicious Activity Summary

xworm persistence rat trojan

Xworm

Detect Xworm Payload

Xworm family

Drops startup file

Adds Run key to start application

Looks up external IP address via web service

Unsigned PE

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-31 18:12

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm family

xworm

Unsigned PE

Description Indicator Process Target
N/A N/A N/A N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-31 18:12

Reported

2024-05-31 18:13

Platform

win7-20240221-en

Max time kernel

58s

Max time network

16s

Command Line

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

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm

trojan rat xworm

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Software\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\XClient.exe" C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\XClient.exe

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

C:\Windows\explorer.exe

"C:\Windows\explorer.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
N/A 127.0.0.1:7000 tcp
N/A 127.0.0.1:7000 tcp
N/A 127.0.0.1:7000 tcp
N/A 127.0.0.1:7000 tcp
N/A 127.0.0.1:7000 tcp
N/A 127.0.0.1:7000 tcp
N/A 127.0.0.1:7000 tcp

Files

memory/1740-0-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

memory/1740-1-0x0000000000090000-0x00000000000A8000-memory.dmp

memory/1740-2-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

memory/1740-13-0x000007FEF5B03000-0x000007FEF5B04000-memory.dmp

memory/1740-14-0x000007FEF5B00000-0x000007FEF64EC000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-31 18:12

Reported

2024-05-31 18:13

Platform

win10v2004-20240508-en

Max time kernel

31s

Max time network

39s

Command Line

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

Signatures

Detect Xworm Payload

Description Indicator Process Target
N/A N/A N/A N/A

Xworm

trojan rat xworm

Drops startup file

Description Indicator Process Target
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\XClient.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\XClient = "C:\\Users\\Admin\\XClient.exe" C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Looks up external IP address via web service

Description Indicator Process Target
N/A ip-api.com N/A N/A

Enumerates physical storage devices

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\XClient.exe

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

C:\Windows\System32\rundll32.exe

C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding

Network

Country Destination Domain Proto
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 ip-api.com udp
US 208.95.112.1:80 ip-api.com tcp
US 8.8.8.8:53 1.112.95.208.in-addr.arpa udp
N/A 127.0.0.1:7000 tcp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
N/A 127.0.0.1:7000 tcp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp

Files

memory/228-0-0x00007FF8E95B3000-0x00007FF8E95B5000-memory.dmp

memory/228-1-0x0000000000710000-0x0000000000728000-memory.dmp

memory/228-2-0x00007FF8E95B0000-0x00007FF8EA071000-memory.dmp

memory/228-7-0x00007FF8E95B3000-0x00007FF8E95B5000-memory.dmp

memory/228-8-0x00007FF8E95B0000-0x00007FF8EA071000-memory.dmp