Malware Analysis Report

2024-10-23 20:59

Sample ID 240901-d62wys1cjc
Target ab82eeb4d0bfc29e266388cc4c2d372b.zip
SHA256 1a09288983e86e28e6542caf27f0aa856ee2375c24e579f835b390ed9ecfc761
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

1a09288983e86e28e6542caf27f0aa856ee2375c24e579f835b390ed9ecfc761

Threat Level: Known bad

The file ab82eeb4d0bfc29e266388cc4c2d372b.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 03:38

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-01 03:38

Reported

2024-09-01 03:40

Platform

win7-20240704-en

Max time kernel

122s

Max time network

129s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4.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\4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4.exe

"C:\Users\Admin\AppData\Local\Temp\4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2296 -s 96

Network

N/A

Files

memory/2296-0-0x0000000000F0B000-0x0000000000F9E000-memory.dmp

memory/2296-1-0x0000000000EA0000-0x0000000000F9E000-memory.dmp

memory/2296-2-0x0000000000F0B000-0x0000000000F9E000-memory.dmp

memory/2296-3-0x0000000000EA0000-0x0000000000F9E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-01 03:38

Reported

2024-09-01 03:40

Platform

win10v2004-20240802-en

Max time kernel

92s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4.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\4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4.exe

"C:\Users\Admin\AppData\Local\Temp\4fced8f23e19e90f89d110b6dc75f76edac9624fc3aa99f793a249a4e76a8ed4.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3840 -ip 3840

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3840 -s 296

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.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 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 138.201.86.20.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 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
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp

Files

memory/3840-0-0x000000000093B000-0x00000000009CE000-memory.dmp

memory/3840-1-0x00000000008D0000-0x00000000009CE000-memory.dmp

memory/3840-2-0x000000000093B000-0x00000000009CE000-memory.dmp

memory/3840-3-0x00000000008D0000-0x00000000009CE000-memory.dmp