Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-lj35haxark
Target 3acd3697cb4c6a2dd4426380acc277e7.zip
SHA256 f30bf648400557b10c60a35c11396bebab932a530993a7718b88c75732aa9811
Tags
expiro backdoor discovery
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: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

f30bf648400557b10c60a35c11396bebab932a530993a7718b88c75732aa9811

Threat Level: Known bad

The file 3acd3697cb4c6a2dd4426380acc277e7.zip was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro, m0yv

Expiro payload

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-31 09:34

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 09:34

Reported

2024-08-31 09:37

Platform

win7-20240704-en

Max time kernel

122s

Max time network

128s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b.exe"

Signatures

Expiro, m0yv

backdoor expiro

Expiro payload

backdoor
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A 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\3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b.exe

"C:\Users\Admin\AppData\Local\Temp\3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1908 -s 68

Network

N/A

Files

memory/1908-0-0x000000000134C000-0x00000000013DF000-memory.dmp

memory/1908-1-0x00000000012E0000-0x00000000013DF000-memory.dmp

memory/1908-2-0x000000000134C000-0x00000000013DF000-memory.dmp

memory/1908-3-0x00000000012E0000-0x00000000013DF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 09:34

Reported

2024-08-31 09:37

Platform

win10v2004-20240802-en

Max time kernel

134s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b.exe"

Signatures

Expiro, m0yv

backdoor expiro

Expiro payload

backdoor
Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A 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\3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b.exe

"C:\Users\Admin\AppData\Local\Temp\3d9f1de39760d512dbddcab1e75364290cb0ae62a1d9d57493c59412678e349b.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4628 -ip 4628

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4628 -s 256

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

memory/4628-0-0x0000000000FEC000-0x000000000107F000-memory.dmp

memory/4628-1-0x0000000000F80000-0x000000000107F000-memory.dmp

memory/4628-2-0x0000000000FEC000-0x000000000107F000-memory.dmp

memory/4628-3-0x0000000000F80000-0x000000000107F000-memory.dmp