Malware Analysis Report

2024-11-16 13:40

Sample ID 240531-pv673shb6s
Target XClient.exe
SHA256 94b65da2b5cc3728547f892a46e9c48c5d54477d10ea8e210304593acd3568e7
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

94b65da2b5cc3728547f892a46e9c48c5d54477d10ea8e210304593acd3568e7

Threat Level: Known bad

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

Malicious Activity Summary

xworm persistence rat trojan

Detect Xworm Payload

Xworm family

Xworm

Drops startup file

Checks computer location settings

Executes dropped EXE

Adds Run key to start application

Unsigned PE

Enumerates physical storage devices

Uses Task Scheduler COM API

Suspicious use of AdjustPrivilegeToken

Creates scheduled task(s)

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-31 12:40

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 12:40

Reported

2024-05-31 12:42

Platform

win7-20240220-en

Max time kernel

122s

Max time network

123s

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
N/A N/A N/A N/A
N/A N/A N/A N/A
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\9.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\9.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\9 N/A
N/A N/A C:\Users\Admin\AppData\Roaming\9 N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-2721934792-624042501-2768869379-1000\Software\Microsoft\Windows\CurrentVersion\Run\9 = "C:\\Users\\Admin\\AppData\\Roaming\\9" C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.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
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\9 N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\9 N/A

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "9" /tr "C:\Users\Admin\AppData\Roaming\9"

C:\Windows\system32\taskeng.exe

taskeng.exe {3EB97015-FDD4-4815-B835-1AD2156F033C} S-1-5-21-2721934792-624042501-2768869379-1000:BISMIZHX\Admin:Interactive:[1]

C:\Users\Admin\AppData\Roaming\9

C:\Users\Admin\AppData\Roaming\9

C:\Users\Admin\AppData\Roaming\9

C:\Users\Admin\AppData\Roaming\9

Network

Country Destination Domain Proto
US 8.8.8.8:53 length-desert.gl.at.ply.gg udp

Files

memory/2728-0-0x000007FEF57F3000-0x000007FEF57F4000-memory.dmp

memory/2728-1-0x0000000000950000-0x0000000000966000-memory.dmp

memory/2728-5-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp

memory/2728-6-0x000007FEF57F3000-0x000007FEF57F4000-memory.dmp

memory/2728-7-0x000007FEF57F0000-0x000007FEF61DC000-memory.dmp

C:\Users\Admin\AppData\Roaming\9

MD5 d172c0a4ae3e8cef6a0a910bde62e195
SHA1 51139fc633fe81a66c8ed55081f92ec5256bd0bd
SHA256 94b65da2b5cc3728547f892a46e9c48c5d54477d10ea8e210304593acd3568e7
SHA512 d82c930a42fd623aeee51007453d201e96110b546f1fb34080fc6d4c1488d71b3828f5f1833d347993444e4d332aa00fbb7b8922fce676d220375470ad0fa467

memory/2632-11-0x0000000000170000-0x0000000000186000-memory.dmp

memory/1564-14-0x0000000001110000-0x0000000001126000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-31 12:40

Reported

2024-05-31 12:42

Platform

win10v2004-20240508-en

Max time kernel

132s

Max time network

101s

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
N/A N/A N/A N/A

Xworm

trojan rat xworm

Checks computer location settings

Description Indicator Process Target
Key value queried \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\Control Panel\International\Geo\Nation C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Drops startup file

Description Indicator Process Target
File opened for modification C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A
File created C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\9.lnk C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Roaming\9 N/A
N/A N/A C:\Users\Admin\AppData\Roaming\9 N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\USER\S-1-5-21-1337824034-2731376981-3755436523-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\9 = "C:\\Users\\Admin\\AppData\\Roaming\\9" C:\Users\Admin\AppData\Local\Temp\XClient.exe N/A

Enumerates physical storage devices

Creates scheduled task(s)

persistence
Description Indicator Process Target
N/A N/A C:\Windows\System32\schtasks.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
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\9 N/A
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Roaming\9 N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3620 wrote to memory of 776 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\schtasks.exe
PID 3620 wrote to memory of 776 N/A C:\Users\Admin\AppData\Local\Temp\XClient.exe C:\Windows\System32\schtasks.exe

Uses Task Scheduler COM API

persistence

Processes

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

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

C:\Windows\System32\schtasks.exe

"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "9" /tr "C:\Users\Admin\AppData\Roaming\9"

C:\Users\Admin\AppData\Roaming\9

C:\Users\Admin\AppData\Roaming\9

C:\Users\Admin\AppData\Roaming\9

C:\Users\Admin\AppData\Roaming\9

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp
US 8.8.8.8:53 length-desert.gl.at.ply.gg udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 57.15.31.184.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp

Files

memory/3620-0-0x00007FFF98773000-0x00007FFF98775000-memory.dmp

memory/3620-1-0x0000000000040000-0x0000000000056000-memory.dmp

memory/3620-5-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

memory/3620-6-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

C:\Users\Admin\AppData\Roaming\9

MD5 d172c0a4ae3e8cef6a0a910bde62e195
SHA1 51139fc633fe81a66c8ed55081f92ec5256bd0bd
SHA256 94b65da2b5cc3728547f892a46e9c48c5d54477d10ea8e210304593acd3568e7
SHA512 d82c930a42fd623aeee51007453d201e96110b546f1fb34080fc6d4c1488d71b3828f5f1833d347993444e4d332aa00fbb7b8922fce676d220375470ad0fa467

memory/1116-9-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

memory/1116-11-0x00007FFF98770000-0x00007FFF99231000-memory.dmp

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\9.log

MD5 2ff39f6c7249774be85fd60a8f9a245e
SHA1 684ff36b31aedc1e587c8496c02722c6698c1c4e
SHA256 e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced
SHA512 1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1