Malware Analysis Report

2025-04-13 10:43

Sample ID 231230-h9r85saheq
Target 121a6914b86cfc9ca8d12864cba4da75
SHA256 93986eac8652157b41ac4464bed7584c6b0c04a3fcdd8bcda47592df69fee3ba
Tags
xloader wufn 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

93986eac8652157b41ac4464bed7584c6b0c04a3fcdd8bcda47592df69fee3ba

Threat Level: Known bad

The file 121a6914b86cfc9ca8d12864cba4da75 was found to be: Known bad.

Malicious Activity Summary

xloader wufn loader rat

Xloader

CustAttr .NET packer

Xloader payload

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

2023-12-30 07:26

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-12-30 07:26

Reported

2023-12-31 05:44

Platform

win7-20231215-en

Max time kernel

117s

Max time network

118s

Command Line

"C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.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 1876 set thread context of 3016 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1876 wrote to memory of 3016 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe
PID 1876 wrote to memory of 3016 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe
PID 1876 wrote to memory of 3016 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe
PID 1876 wrote to memory of 3016 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe
PID 1876 wrote to memory of 3016 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe
PID 1876 wrote to memory of 3016 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe
PID 1876 wrote to memory of 3016 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe
PID 3016 wrote to memory of 2788 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Windows\SysWOW64\WerFault.exe
PID 3016 wrote to memory of 2788 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Windows\SysWOW64\WerFault.exe
PID 3016 wrote to memory of 2788 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Windows\SysWOW64\WerFault.exe
PID 3016 wrote to memory of 2788 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Windows\SysWOW64\WerFault.exe

Processes

C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe

"C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3016 -s 36

C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe

"C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe"

Network

N/A

Files

memory/1876-1-0x0000000074420000-0x0000000074B0E000-memory.dmp

memory/1876-0-0x0000000001070000-0x00000000011B4000-memory.dmp

memory/1876-2-0x0000000000BE0000-0x0000000000C20000-memory.dmp

memory/1876-3-0x0000000000660000-0x0000000000672000-memory.dmp

memory/1876-4-0x0000000074420000-0x0000000074B0E000-memory.dmp

memory/1876-5-0x0000000000BE0000-0x0000000000C20000-memory.dmp

memory/1876-6-0x0000000005660000-0x00000000056FE000-memory.dmp

memory/1876-7-0x0000000000B10000-0x0000000000B3E000-memory.dmp

memory/1876-14-0x0000000074420000-0x0000000074B0E000-memory.dmp

memory/3016-13-0x0000000000400000-0x0000000000428000-memory.dmp

memory/3016-11-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

memory/3016-10-0x0000000000400000-0x0000000000428000-memory.dmp

memory/3016-8-0x0000000000400000-0x0000000000428000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-12-30 07:26

Reported

2023-12-31 05:43

Platform

win10v2004-20231215-en

Max time kernel

132s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.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 3672 set thread context of 4472 N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe

"C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe"

C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe

"C:\Users\Admin\AppData\Local\Temp\121a6914b86cfc9ca8d12864cba4da75.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.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/3672-1-0x00000000749E0000-0x0000000075190000-memory.dmp

memory/3672-0-0x0000000000B50000-0x0000000000C94000-memory.dmp

memory/3672-2-0x0000000005C90000-0x0000000006234000-memory.dmp

memory/3672-3-0x00000000056E0000-0x0000000005772000-memory.dmp

memory/3672-6-0x0000000005950000-0x00000000059EC000-memory.dmp

memory/3672-5-0x00000000056A0000-0x00000000056AA000-memory.dmp

memory/3672-4-0x0000000005850000-0x0000000005860000-memory.dmp

memory/3672-7-0x00000000056C0000-0x00000000056D2000-memory.dmp

memory/3672-8-0x00000000749E0000-0x0000000075190000-memory.dmp

memory/3672-9-0x0000000005850000-0x0000000005860000-memory.dmp

memory/3672-10-0x00000000066A0000-0x000000000673E000-memory.dmp

memory/3672-11-0x0000000008B00000-0x0000000008B2E000-memory.dmp

memory/4472-12-0x0000000000400000-0x0000000000428000-memory.dmp

memory/3672-14-0x00000000749E0000-0x0000000075190000-memory.dmp

memory/4472-15-0x00000000015E0000-0x000000000192A000-memory.dmp

memory/4472-16-0x00000000015E0000-0x000000000192A000-memory.dmp