Malware Analysis Report

2025-04-13 10:47

Sample ID 231228-b5gtaahbhq
Target be35f0ce65b229e225d6c65b48704a2a
SHA256 8bc53adb417402cf954d8018bc35c0f4f853d5a2e3471c4de98ca8e1fa8fa1e9
Tags
xloader b82a loader rat
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

8bc53adb417402cf954d8018bc35c0f4f853d5a2e3471c4de98ca8e1fa8fa1e9

Threat Level: Known bad

The file be35f0ce65b229e225d6c65b48704a2a was found to be: Known bad.

Malicious Activity Summary

xloader b82a loader rat

Xloader

Xloader payload

CustAttr .NET packer

Suspicious use of SetThreadContext

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

Suspicious behavior: EnumeratesProcesses

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-28 01:43

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-28 01:43

Reported

2023-12-29 13:27

Platform

win10v2004-20231215-en

Max time kernel

170s

Max time network

169s

Command Line

"C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.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 3028 set thread context of 2384 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe

"C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe"

C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe

"C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 22.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 190.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 57.110.18.2.in-addr.arpa udp
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 167.109.18.2.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 178.223.142.52.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.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 8.8.8.8:53 205.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 26.178.89.13.in-addr.arpa udp

Files

memory/3028-1-0x0000000074840000-0x0000000074FF0000-memory.dmp

memory/3028-0-0x0000000000D50000-0x0000000000DE8000-memory.dmp

memory/3028-2-0x0000000005D10000-0x00000000062B4000-memory.dmp

memory/3028-3-0x0000000005680000-0x0000000005712000-memory.dmp

memory/3028-4-0x0000000005800000-0x000000000589C000-memory.dmp

memory/3028-5-0x0000000005660000-0x0000000005670000-memory.dmp

memory/3028-6-0x0000000005740000-0x000000000574A000-memory.dmp

memory/3028-7-0x0000000005110000-0x0000000005122000-memory.dmp

memory/3028-8-0x0000000074840000-0x0000000074FF0000-memory.dmp

memory/3028-9-0x0000000005660000-0x0000000005670000-memory.dmp

memory/3028-10-0x0000000006FF0000-0x000000000706C000-memory.dmp

memory/3028-11-0x0000000007070000-0x00000000070A4000-memory.dmp

memory/2384-12-0x0000000000400000-0x0000000000428000-memory.dmp

memory/3028-14-0x0000000074840000-0x0000000074FF0000-memory.dmp

memory/2384-15-0x0000000001AD0000-0x0000000001E1A000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-28 01:43

Reported

2023-12-29 13:27

Platform

win7-20231215-en

Max time kernel

122s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.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 2952 set thread context of 2012 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2952 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe
PID 2952 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe
PID 2952 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe
PID 2952 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe
PID 2952 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe
PID 2952 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe
PID 2952 wrote to memory of 2012 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe
PID 2012 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Windows\SysWOW64\WerFault.exe
PID 2012 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Windows\SysWOW64\WerFault.exe
PID 2012 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Windows\SysWOW64\WerFault.exe
PID 2012 wrote to memory of 2644 N/A C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe

"C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe"

C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe

"C:\Users\Admin\AppData\Local\Temp\be35f0ce65b229e225d6c65b48704a2a.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2012 -s 36

Network

N/A

Files

memory/2952-0-0x0000000001300000-0x0000000001398000-memory.dmp

memory/2952-1-0x0000000073E80000-0x000000007456E000-memory.dmp

memory/2952-2-0x0000000000390000-0x00000000003D0000-memory.dmp

memory/2952-3-0x0000000000210000-0x0000000000222000-memory.dmp

memory/2952-4-0x0000000073E80000-0x000000007456E000-memory.dmp

memory/2952-5-0x0000000000390000-0x00000000003D0000-memory.dmp

memory/2952-6-0x0000000005300000-0x000000000537C000-memory.dmp

memory/2952-7-0x0000000000760000-0x0000000000794000-memory.dmp

memory/2012-8-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2012-10-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2012-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/2012-13-0x0000000000400000-0x0000000000428000-memory.dmp

memory/2952-14-0x0000000073E80000-0x000000007456E000-memory.dmp