Malware Analysis Report

2025-04-13 10:47

Sample ID 231227-xst4qsbeal
Target b6103d5b685ed7510979c4504bdb6d3e
SHA256 d919327d6cd9ea0111387bcd134c46659850956c914fac63dbea781188f04a70
Tags
xloader uecu loader rat
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

d919327d6cd9ea0111387bcd134c46659850956c914fac63dbea781188f04a70

Threat Level: Known bad

The file b6103d5b685ed7510979c4504bdb6d3e was found to be: Known bad.

Malicious Activity Summary

xloader uecu loader rat

Xloader

Xloader payload

Suspicious use of SetThreadContext

Unsigned PE

Suspicious use of WriteProcessMemory

Suspicious use of AdjustPrivilegeToken

Enumerates system info in registry

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-12-27 19:07

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-27 19:07

Reported

2023-12-29 09:29

Platform

win7-20231215-en

Max time kernel

147s

Max time network

121s

Command Line

C:\Windows\Explorer.EXE

Signatures

Xloader

loader xloader

Xloader payload

rat
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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 3004 set thread context of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 2892 set thread context of 1136 N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe C:\Windows\Explorer.EXE
PID 2704 set thread context of 1136 N/A C:\Windows\SysWOW64\chkdsk.exe C:\Windows\Explorer.EXE

Enumerates system info in registry

Description Indicator Process Target
Key value queried \REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\Identifier C:\Windows\SysWOW64\chkdsk.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\chkdsk.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3004 wrote to memory of 2892 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 1136 wrote to memory of 2704 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\chkdsk.exe
PID 1136 wrote to memory of 2704 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\chkdsk.exe
PID 1136 wrote to memory of 2704 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\chkdsk.exe
PID 1136 wrote to memory of 2704 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\chkdsk.exe
PID 2704 wrote to memory of 2588 N/A C:\Windows\SysWOW64\chkdsk.exe C:\Windows\SysWOW64\cmd.exe
PID 2704 wrote to memory of 2588 N/A C:\Windows\SysWOW64\chkdsk.exe C:\Windows\SysWOW64\cmd.exe
PID 2704 wrote to memory of 2588 N/A C:\Windows\SysWOW64\chkdsk.exe C:\Windows\SysWOW64\cmd.exe
PID 2704 wrote to memory of 2588 N/A C:\Windows\SysWOW64\chkdsk.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

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

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

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

"{path}"

C:\Windows\SysWOW64\chkdsk.exe

"C:\Windows\SysWOW64\chkdsk.exe"

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"

Network

N/A

Files

memory/3004-0-0x0000000000310000-0x00000000003AC000-memory.dmp

memory/3004-1-0x0000000074670000-0x0000000074D5E000-memory.dmp

memory/3004-2-0x0000000004FA0000-0x0000000004FE0000-memory.dmp

memory/3004-3-0x00000000003E0000-0x00000000003E8000-memory.dmp

memory/3004-4-0x0000000074670000-0x0000000074D5E000-memory.dmp

memory/3004-5-0x0000000004FA0000-0x0000000004FE0000-memory.dmp

memory/3004-6-0x0000000005E40000-0x0000000005EC0000-memory.dmp

memory/3004-7-0x00000000006A0000-0x00000000006CE000-memory.dmp

memory/2892-10-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2892-8-0x0000000000400000-0x0000000000428000-memory.dmp

memory/3004-15-0x0000000074670000-0x0000000074D5E000-memory.dmp

memory/2892-14-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2892-16-0x0000000000BF0000-0x0000000000EF3000-memory.dmp

memory/2892-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1136-20-0x0000000006400000-0x0000000006586000-memory.dmp

memory/2892-19-0x0000000000100000-0x0000000000110000-memory.dmp

memory/2892-18-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2704-22-0x0000000000160000-0x0000000000167000-memory.dmp

memory/2704-23-0x0000000000080000-0x00000000000A8000-memory.dmp

memory/2704-21-0x0000000000160000-0x0000000000167000-memory.dmp

memory/2704-24-0x00000000023B0000-0x00000000026B3000-memory.dmp

memory/2704-25-0x0000000000080000-0x00000000000A8000-memory.dmp

memory/2704-27-0x0000000002170000-0x00000000021FF000-memory.dmp

memory/1136-29-0x0000000006400000-0x0000000006586000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-27 19:07

Reported

2023-12-29 09:30

Platform

win10v2004-20231215-en

Max time kernel

101s

Max time network

140s

Command Line

C:\Windows\Explorer.EXE

Signatures

Xloader

loader xloader

Xloader payload

rat
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
N/A N/A N/A N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A
N/A N/A C:\Windows\SysWOW64\systray.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\systray.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 508 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 508 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 508 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 508 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 508 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 508 wrote to memory of 1888 N/A C:\Users\Admin\AppData\Local\Temp\Payment_Advice.exe C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
PID 3500 wrote to memory of 1648 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\systray.exe
PID 3500 wrote to memory of 1648 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\systray.exe
PID 3500 wrote to memory of 1648 N/A C:\Windows\Explorer.EXE C:\Windows\SysWOW64\systray.exe
PID 1648 wrote to memory of 540 N/A C:\Windows\SysWOW64\systray.exe C:\Windows\SysWOW64\cmd.exe
PID 1648 wrote to memory of 540 N/A C:\Windows\SysWOW64\systray.exe C:\Windows\SysWOW64\cmd.exe
PID 1648 wrote to memory of 540 N/A C:\Windows\SysWOW64\systray.exe C:\Windows\SysWOW64\cmd.exe

Processes

C:\Windows\Explorer.EXE

C:\Windows\Explorer.EXE

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

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

C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe

"{path}"

C:\Windows\SysWOW64\systray.exe

"C:\Windows\SysWOW64\systray.exe"

C:\Windows\SysWOW64\cmd.exe

/c del "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 17.53.126.40.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 100.5.17.2.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.16.110.114:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.16.110.114:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
US 8.8.8.8:53 udp
N/A 96.17.178.209:80 tcp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
US 8.8.8.8:53 udp
GB 96.17.178.176:80 tcp
GB 96.17.178.176:80 tcp
US 8.8.8.8:53 udp
IE 20.223.35.26:443 tcp
US 8.8.8.8:53 udp
GB 88.221.134.18:80 tcp
GB 88.221.134.18:80 tcp
US 8.8.8.8:53 udp
GB 87.248.205.0:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 93.184.221.240:80 tcp
US 8.8.8.8:53 www.drelip.com udp
US 8.8.8.8:53 190.130.33.3.in-addr.arpa udp
IE 20.223.35.26:443 tcp
IE 20.223.35.26:443 tcp
IE 20.223.35.26:443 tcp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 8.8.8.8:53 www.starryfinds.com udp
US 162.159.129.68:80 www.starryfinds.com tcp
US 204.79.197.200:443 g.bing.com tcp
US 204.79.197.200:443 g.bing.com tcp
US 204.79.197.200:443 g.bing.com tcp
US 204.79.197.200:443 g.bing.com tcp
US 204.79.197.200:443 g.bing.com tcp
GB 87.248.205.0:80 tcp
US 93.184.221.240:80 tcp
MY 43.252.212.117:80 www.kupon.asia tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 93.184.221.240:80 tcp
US 93.184.221.240:80 tcp
GB 87.248.205.0:80 tcp
GB 87.248.205.0:80 tcp
N/A 52.111.227.13:443 tcp
GB 87.248.205.0:80 tcp
GB 87.248.205.0:80 tcp
US 8.8.8.8:53 udp
GB 88.221.135.211:80 tcp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
US 8.8.8.8:53 udp
N/A 3.33.130.190:80 tcp
US 8.8.8.8:53 www.shelavish2.com udp
US 8.8.8.8:53 www.ishtarhotel.com udp
US 34.226.105.125:80 www.ishtarhotel.com tcp
US 8.8.8.8:53 125.105.226.34.in-addr.arpa udp
US 8.8.8.8:53 www.jalenowens.com udp
GB 142.250.180.19:80 www.jalenowens.com tcp
US 8.8.8.8:53 19.180.250.142.in-addr.arpa udp

Files

memory/508-1-0x0000000074DD0000-0x0000000075580000-memory.dmp

memory/508-0-0x0000000000F50000-0x0000000000FEC000-memory.dmp

memory/508-2-0x0000000005F10000-0x00000000064B4000-memory.dmp

memory/508-3-0x0000000005880000-0x0000000005912000-memory.dmp

memory/508-4-0x0000000005A60000-0x0000000005A70000-memory.dmp

memory/508-5-0x0000000005940000-0x000000000594A000-memory.dmp

memory/508-7-0x0000000006B60000-0x0000000006BFC000-memory.dmp

memory/508-6-0x0000000005B30000-0x0000000005B38000-memory.dmp

memory/508-8-0x0000000074DD0000-0x0000000075580000-memory.dmp

memory/508-9-0x0000000005A60000-0x0000000005A70000-memory.dmp

memory/508-10-0x00000000084F0000-0x0000000008570000-memory.dmp

memory/508-11-0x00000000083B0000-0x00000000083DE000-memory.dmp

memory/1888-12-0x0000000000400000-0x0000000000428000-memory.dmp

memory/1888-15-0x00000000019B0000-0x0000000001CFA000-memory.dmp

memory/508-14-0x0000000074DD0000-0x0000000075580000-memory.dmp

memory/1888-17-0x0000000000400000-0x0000000000428000-memory.dmp

memory/3500-19-0x00000000029B0000-0x0000000002AE3000-memory.dmp

memory/1888-18-0x0000000001420000-0x0000000001430000-memory.dmp

memory/3500-23-0x0000000002E80000-0x0000000002F72000-memory.dmp

memory/1888-22-0x0000000001870000-0x0000000001880000-memory.dmp

memory/1888-21-0x0000000000400000-0x0000000000428000-memory.dmp

memory/1648-25-0x0000000000EB0000-0x0000000000EB6000-memory.dmp

memory/1648-24-0x0000000000EB0000-0x0000000000EB6000-memory.dmp

memory/1648-26-0x0000000000670000-0x0000000000698000-memory.dmp

memory/1648-27-0x0000000002630000-0x000000000297A000-memory.dmp

memory/1648-28-0x0000000000670000-0x0000000000698000-memory.dmp

memory/1648-29-0x0000000002460000-0x00000000024EF000-memory.dmp

memory/3500-31-0x0000000002E80000-0x0000000002F72000-memory.dmp

memory/3500-33-0x0000000008460000-0x0000000008580000-memory.dmp

memory/3500-35-0x0000000008460000-0x0000000008580000-memory.dmp

memory/3500-38-0x0000000008460000-0x0000000008580000-memory.dmp