Malware Analysis Report

2024-10-19 08:15

Sample ID 240831-bc6lyawhqr
Target 5598432d4bceae719c75c2fcd1fd410d.zip
SHA256 a4783606bbc17025a47797186b86d4f08ad956ba409070dd2a591fc5c7f0d09c
Tags
expiro backdoor discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

a4783606bbc17025a47797186b86d4f08ad956ba409070dd2a591fc5c7f0d09c

Threat Level: Known bad

The file 5598432d4bceae719c75c2fcd1fd410d.zip was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro, m0yv

Expiro payload

System Location Discovery: System Language Discovery

Unsigned PE

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-31 01:00

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 01:00

Reported

2024-08-31 01:03

Platform

win10v2004-20240802-en

Max time kernel

135s

Max time network

141s

Command Line

"C:\Users\Admin\AppData\Local\Temp\96bf9018182f9b6df31ff19d686510b622213dc90fb5c45f221dfa7f0d3cfb77.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\96bf9018182f9b6df31ff19d686510b622213dc90fb5c45f221dfa7f0d3cfb77.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\96bf9018182f9b6df31ff19d686510b622213dc90fb5c45f221dfa7f0d3cfb77.exe

"C:\Users\Admin\AppData\Local\Temp\96bf9018182f9b6df31ff19d686510b622213dc90fb5c45f221dfa7f0d3cfb77.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

memory/724-0-0x0000000010074000-0x0000000010108000-memory.dmp

memory/724-1-0x0000000010000000-0x0000000010108000-memory.dmp

memory/724-2-0x0000000010074000-0x0000000010108000-memory.dmp

memory/724-3-0x0000000010000000-0x0000000010108000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 01:00

Reported

2024-08-31 01:03

Platform

win7-20240704-en

Max time kernel

13s

Max time network

20s

Command Line

"C:\Users\Admin\AppData\Local\Temp\96bf9018182f9b6df31ff19d686510b622213dc90fb5c45f221dfa7f0d3cfb77.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\96bf9018182f9b6df31ff19d686510b622213dc90fb5c45f221dfa7f0d3cfb77.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\96bf9018182f9b6df31ff19d686510b622213dc90fb5c45f221dfa7f0d3cfb77.exe

"C:\Users\Admin\AppData\Local\Temp\96bf9018182f9b6df31ff19d686510b622213dc90fb5c45f221dfa7f0d3cfb77.exe"

Network

N/A

Files

memory/2012-0-0x0000000010074000-0x0000000010108000-memory.dmp

memory/2012-1-0x0000000010000000-0x0000000010108000-memory.dmp

memory/2012-2-0x0000000010074000-0x0000000010108000-memory.dmp

memory/2012-3-0x0000000010000000-0x0000000010108000-memory.dmp