Malware Analysis Report

2024-11-15 08:49

Sample ID 241110-l2zj2atpa1
Target 637b659f7494190a4312061c0deeb1dd3d14650c
SHA256 565517ddfa6d09fa094c5dbddfe70447d0fcc0f2dfe66bba5f9f9ef73c47c6d6
Tags
purecrypter discovery downloader loader persistence
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 Overview

score
10/10

SHA256

565517ddfa6d09fa094c5dbddfe70447d0fcc0f2dfe66bba5f9f9ef73c47c6d6

Threat Level: Known bad

The file 637b659f7494190a4312061c0deeb1dd3d14650c was found to be: Known bad.

Malicious Activity Summary

purecrypter discovery downloader loader persistence

PureCrypter

Purecrypter family

Executes dropped EXE

Adds Run key to start application

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-11-10 10:02

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-11-10 10:02

Reported

2024-11-10 10:05

Platform

win10v2004-20241007-en

Max time kernel

150s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7ad55278a8285dace5bb637348e5990c356a7c35bbcb8e2d53fd3dc64573d4c0.exe"

Signatures

PureCrypter

loader downloader purecrypter

Purecrypter family

purecrypter

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE N/A

Adds Run key to start application

persistence
Description Indicator Process Target
Set value (str) \REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce\wextract_cleanup0 = "rundll32.exe C:\\Windows\\system32\\advpack.dll,DelNodeRunDLL32 \"C:\\Users\\Admin\\AppData\\Local\\Temp\\IXP000.TMP\\\"" C:\Users\Admin\AppData\Local\Temp\7ad55278a8285dace5bb637348e5990c356a7c35bbcb8e2d53fd3dc64573d4c0.exe N/A

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE N/A

Suspicious use of AdjustPrivilegeToken

Description Indicator Process Target
Token: SeDebugPrivilege N/A C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7ad55278a8285dace5bb637348e5990c356a7c35bbcb8e2d53fd3dc64573d4c0.exe

"C:\Users\Admin\AppData\Local\Temp\7ad55278a8285dace5bb637348e5990c356a7c35bbcb8e2d53fd3dc64573d4c0.exe"

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE

C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\SETUP_~1.EXE

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 200.163.202.172.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 88.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp
US 8.8.8.8:53 www.filifilm.com.br udp

Files

memory/2264-5-0x000000007519E000-0x000000007519F000-memory.dmp

memory/2264-6-0x0000000000250000-0x0000000000262000-memory.dmp

memory/2264-7-0x0000000075190000-0x0000000075940000-memory.dmp

memory/2264-8-0x000000007519E000-0x000000007519F000-memory.dmp

memory/2264-9-0x0000000075190000-0x0000000075940000-memory.dmp