Malware Analysis Report

2025-04-13 10:47

Sample ID 231225-ze4gcscbf8
Target 3be1fa609b4f6efa9d30b5c75810f863
SHA256 27572043b01a99f3901af4bd40faf03cd04e722e3fb7ba866ccdb3b2d3fabb11
Tags
xloader b82a loader rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

27572043b01a99f3901af4bd40faf03cd04e722e3fb7ba866ccdb3b2d3fabb11

Threat Level: Known bad

The file 3be1fa609b4f6efa9d30b5c75810f863 was found to be: Known bad.

Malicious Activity Summary

xloader b82a loader rat

Xloader

CustAttr .NET packer

Xloader payload

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-25 20:38

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-25 20:38

Reported

2023-12-29 12:22

Platform

win7-20231129-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe"

Signatures

Xloader

loader xloader

CustAttr .NET packer

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

Xloader payload

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 888 set thread context of 2644 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 888 wrote to memory of 2672 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2672 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2672 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2672 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe
PID 888 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe

Processes

C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe

"C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe"

C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe

"C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe"

C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe

"C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe"

Network

N/A

Files

memory/888-0-0x0000000000FE0000-0x00000000010B2000-memory.dmp

memory/888-1-0x0000000074E50000-0x000000007553E000-memory.dmp

memory/888-2-0x0000000000F40000-0x0000000000F80000-memory.dmp

memory/888-3-0x00000000004B0000-0x00000000004C2000-memory.dmp

memory/888-4-0x0000000074E50000-0x000000007553E000-memory.dmp

memory/888-5-0x0000000000F40000-0x0000000000F80000-memory.dmp

memory/888-6-0x0000000006010000-0x000000000608C000-memory.dmp

memory/2644-16-0x00000000008F0000-0x0000000000BF3000-memory.dmp

memory/888-15-0x0000000074E50000-0x000000007553E000-memory.dmp

memory/2644-14-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2644-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2644-10-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2644-8-0x0000000000400000-0x0000000000428000-memory.dmp

memory/888-7-0x00000000006A0000-0x00000000006D4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-25 20:38

Reported

2023-12-29 12:22

Platform

win10v2004-20231215-en

Max time kernel

148s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe"

Signatures

Xloader

loader xloader

CustAttr .NET packer

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

Xloader payload

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

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 4516 set thread context of 3940 N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe

"C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe"

C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.exe

"C:\Users\Admin\AppData\Local\Temp\3be1fa609b4f6efa9d30b5c75810f863.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 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 210.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 83.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 20.231.121.79:80 tcp
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 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.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 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 179.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 84.65.42.20.in-addr.arpa udp

Files

memory/4516-1-0x0000000000FD0000-0x00000000010A2000-memory.dmp

memory/4516-2-0x0000000005A80000-0x0000000005B1C000-memory.dmp

memory/4516-0-0x0000000075010000-0x00000000757C0000-memory.dmp

memory/4516-3-0x00000000060D0000-0x0000000006674000-memory.dmp

memory/4516-4-0x0000000005BC0000-0x0000000005C52000-memory.dmp

memory/4516-5-0x0000000005D90000-0x0000000005DA0000-memory.dmp

memory/4516-6-0x0000000005B40000-0x0000000005B4A000-memory.dmp

memory/4516-7-0x0000000005E00000-0x0000000005E56000-memory.dmp

memory/4516-8-0x0000000005490000-0x00000000054A2000-memory.dmp

memory/4516-9-0x0000000075010000-0x00000000757C0000-memory.dmp

memory/4516-10-0x0000000005D90000-0x0000000005DA0000-memory.dmp

memory/4516-11-0x00000000085F0000-0x000000000866C000-memory.dmp

memory/4516-12-0x00000000071D0000-0x0000000007204000-memory.dmp

memory/3940-13-0x0000000000400000-0x0000000000428000-memory.dmp

memory/3940-14-0x0000000001840000-0x0000000001B8A000-memory.dmp

memory/4516-16-0x0000000075010000-0x00000000757C0000-memory.dmp