Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-jk4fjssfrq
Target eeff2ab6ead0a81df9718b2de5d81d08.zip
SHA256 db5184ed3a468a93295670ae4c76395d12db142982390dfd9b465bb62749fe53
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

db5184ed3a468a93295670ae4c76395d12db142982390dfd9b465bb62749fe53

Threat Level: Known bad

The file eeff2ab6ead0a81df9718b2de5d81d08.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 07:44

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 07:44

Reported

2024-08-31 07:47

Platform

win7-20240704-en

Max time kernel

13s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\212918a42f744a3cdc9c42aae2dd287ad3d33facfc3a85a484f73cad6e592dc3.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

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.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\212918a42f744a3cdc9c42aae2dd287ad3d33facfc3a85a484f73cad6e592dc3.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\212918a42f744a3cdc9c42aae2dd287ad3d33facfc3a85a484f73cad6e592dc3.exe

"C:\Users\Admin\AppData\Local\Temp\212918a42f744a3cdc9c42aae2dd287ad3d33facfc3a85a484f73cad6e592dc3.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2276 -s 68

Network

N/A

Files

memory/2276-1-0x0000000000A90000-0x0000000000B8F000-memory.dmp

memory/2276-0-0x0000000000AFC000-0x0000000000B8F000-memory.dmp

memory/2276-2-0x0000000000AFC000-0x0000000000B8F000-memory.dmp

memory/2276-3-0x0000000000A90000-0x0000000000B8F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 07:44

Reported

2024-08-31 07:47

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

153s

Command Line

"C:\Users\Admin\AppData\Local\Temp\212918a42f744a3cdc9c42aae2dd287ad3d33facfc3a85a484f73cad6e592dc3.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\212918a42f744a3cdc9c42aae2dd287ad3d33facfc3a85a484f73cad6e592dc3.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\212918a42f744a3cdc9c42aae2dd287ad3d33facfc3a85a484f73cad6e592dc3.exe

"C:\Users\Admin\AppData\Local\Temp\212918a42f744a3cdc9c42aae2dd287ad3d33facfc3a85a484f73cad6e592dc3.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4048 -ip 4048

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4048 -s 252

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.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
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/4048-0-0x00000000007DC000-0x000000000086F000-memory.dmp

memory/4048-1-0x0000000000770000-0x000000000086F000-memory.dmp

memory/4048-2-0x00000000007DC000-0x000000000086F000-memory.dmp

memory/4048-3-0x0000000000770000-0x000000000086F000-memory.dmp