Malware Analysis Report

2024-10-23 20:59

Sample ID 240901-x8zzxszhpe
Target df2d7668906396625694e3cebaa3f854.zip
SHA256 8d8ef6f794f3a242e1d19a2227f86562e506a9c8779b5342f31b06d42ecd7398
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

8d8ef6f794f3a242e1d19a2227f86562e506a9c8779b5342f31b06d42ecd7398

Threat Level: Known bad

The file df2d7668906396625694e3cebaa3f854.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

2024-09-01 19:32

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-01 19:32

Reported

2024-09-01 19:34

Platform

win7-20240704-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6.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

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\628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6.exe

"C:\Users\Admin\AppData\Local\Temp\628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2556 -s 64

Network

N/A

Files

memory/2556-0-0x00000000003DB000-0x000000000046E000-memory.dmp

memory/2556-1-0x0000000000370000-0x000000000046E000-memory.dmp

memory/2556-2-0x00000000003DB000-0x000000000046E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-01 19:32

Reported

2024-09-01 19:34

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

97s

Command Line

"C:\Users\Admin\AppData\Local\Temp\628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6.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\628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6.exe

"C:\Users\Admin\AppData\Local\Temp\628e8e8f4dc31191a98ce300f0f3f721ad80b184b3c02d288fbe674f92d63bb6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 356 -p 2144 -ip 2144

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2144 -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 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 83.210.23.2.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp

Files

memory/2144-0-0x000000000050B000-0x000000000059E000-memory.dmp

memory/2144-1-0x00000000004A0000-0x000000000059E000-memory.dmp

memory/2144-2-0x000000000050B000-0x000000000059E000-memory.dmp

memory/2144-3-0x00000000004A0000-0x000000000059E000-memory.dmp