Malware Analysis Report

2025-04-13 10:47

Sample ID 231225-ytmaysggg9
Target 3a0f86482d12e9d3a275763997708d9b
SHA256 b5918ac7fd3c3323260a3158fe0230b58cdb7098bb659285374e5e2dc1c75f7d
Tags
xloader u3r5 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

b5918ac7fd3c3323260a3158fe0230b58cdb7098bb659285374e5e2dc1c75f7d

Threat Level: Known bad

The file 3a0f86482d12e9d3a275763997708d9b was found to be: Known bad.

Malicious Activity Summary

xloader u3r5 loader rat

Xloader

CustAttr .NET packer

Xloader payload

Suspicious use of SetThreadContext

Unsigned PE

Suspicious behavior: EnumeratesProcesses

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2023-12-25 20:04

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-25 20:04

Reported

2023-12-29 10:34

Platform

win7-20231215-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.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 2252 set thread context of 1328 N/A C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe

"C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe"

C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe

"C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe"

Network

N/A

Files

memory/2252-0-0x0000000000860000-0x00000000009A0000-memory.dmp

memory/2252-1-0x0000000074420000-0x0000000074B0E000-memory.dmp

memory/2252-2-0x0000000004910000-0x0000000004950000-memory.dmp

memory/2252-3-0x0000000000360000-0x0000000000372000-memory.dmp

memory/2252-4-0x0000000074420000-0x0000000074B0E000-memory.dmp

memory/2252-5-0x0000000004910000-0x0000000004950000-memory.dmp

memory/2252-6-0x00000000048A0000-0x0000000004918000-memory.dmp

memory/2252-7-0x0000000000580000-0x00000000005B0000-memory.dmp

memory/1328-16-0x0000000000C10000-0x0000000000F13000-memory.dmp

memory/2252-15-0x0000000074420000-0x0000000074B0E000-memory.dmp

memory/1328-14-0x0000000000400000-0x0000000000429000-memory.dmp

memory/1328-12-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/1328-10-0x0000000000400000-0x0000000000429000-memory.dmp

memory/1328-8-0x0000000000400000-0x0000000000429000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-25 20:04

Reported

2023-12-29 10:35

Platform

win10v2004-20231215-en

Max time kernel

149s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.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 4876 set thread context of 4888 N/A C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe

Processes

C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe

"C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe"

C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe

"C:\Users\Admin\AppData\Local\Temp\3a0f86482d12e9d3a275763997708d9b.exe"

Network

Country Destination Domain Proto
GB 23.44.234.16:80 tcp
US 138.91.171.81:80 tcp
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 20.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 176.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 211.135.221.88.in-addr.arpa udp
GB 96.17.178.176:80 tcp
GB 88.221.135.211:80 tcp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.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 13.107.21.200:443 tse1.mm.bing.net tcp
US 13.107.21.200:443 tse1.mm.bing.net tcp
US 13.107.21.200:443 tse1.mm.bing.net tcp
US 13.107.21.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 200.21.107.13.in-addr.arpa udp
US 8.8.8.8:53 32.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 174.178.17.96.in-addr.arpa udp

Files

memory/4876-1-0x0000000074A30000-0x00000000751E0000-memory.dmp

memory/4876-0-0x0000000000430000-0x0000000000570000-memory.dmp

memory/4876-2-0x0000000004F00000-0x0000000004F9C000-memory.dmp

memory/4876-3-0x0000000005550000-0x0000000005AF4000-memory.dmp

memory/4876-4-0x0000000005040000-0x00000000050D2000-memory.dmp

memory/4876-5-0x0000000005010000-0x0000000005020000-memory.dmp

memory/4876-7-0x0000000005230000-0x0000000005286000-memory.dmp

memory/4876-6-0x0000000005000000-0x000000000500A000-memory.dmp

memory/4876-8-0x0000000004900000-0x0000000004912000-memory.dmp

memory/4876-9-0x0000000074A30000-0x00000000751E0000-memory.dmp

memory/4876-10-0x0000000005010000-0x0000000005020000-memory.dmp

memory/4876-11-0x0000000006900000-0x0000000006978000-memory.dmp

memory/4876-15-0x0000000074A30000-0x00000000751E0000-memory.dmp

memory/4888-13-0x0000000000400000-0x0000000000429000-memory.dmp

memory/4876-12-0x0000000006AB0000-0x0000000006AE0000-memory.dmp

memory/4888-16-0x0000000000F40000-0x000000000128A000-memory.dmp

memory/4888-17-0x0000000000F40000-0x000000000128A000-memory.dmp