Malware Analysis Report

2024-10-23 20:59

Sample ID 240902-bq33zaydjg
Target dc64fb891964a7694201dc450ccc7a4f.zip
SHA256 00ce989fe271368a6512f8ca6c37771683766960500c3562196dca00ef9b5479
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

00ce989fe271368a6512f8ca6c37771683766960500c3562196dca00ef9b5479

Threat Level: Known bad

The file dc64fb891964a7694201dc450ccc7a4f.zip was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro, m0yv

Expiro payload

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-02 01:21

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-02 01:21

Reported

2024-09-02 01:24

Platform

win7-20240704-en

Max time kernel

122s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\49743c2e8e3d1ff87eb95d633804f3e215a344323699085096b5e832b3ae55dc.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\49743c2e8e3d1ff87eb95d633804f3e215a344323699085096b5e832b3ae55dc.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\49743c2e8e3d1ff87eb95d633804f3e215a344323699085096b5e832b3ae55dc.exe

"C:\Users\Admin\AppData\Local\Temp\49743c2e8e3d1ff87eb95d633804f3e215a344323699085096b5e832b3ae55dc.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1924 -s 132

Network

N/A

Files

memory/1924-0-0x0000000000D4C000-0x0000000000DDF000-memory.dmp

memory/1924-1-0x0000000000CD0000-0x0000000000DDF000-memory.dmp

memory/1924-2-0x0000000000D4C000-0x0000000000DDF000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-02 01:21

Reported

2024-09-02 01:24

Platform

win10v2004-20240802-en

Max time kernel

91s

Max time network

138s

Command Line

"C:\Users\Admin\AppData\Local\Temp\49743c2e8e3d1ff87eb95d633804f3e215a344323699085096b5e832b3ae55dc.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\49743c2e8e3d1ff87eb95d633804f3e215a344323699085096b5e832b3ae55dc.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\49743c2e8e3d1ff87eb95d633804f3e215a344323699085096b5e832b3ae55dc.exe

"C:\Users\Admin\AppData\Local\Temp\49743c2e8e3d1ff87eb95d633804f3e215a344323699085096b5e832b3ae55dc.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 64 -ip 64

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 64 -s 400

Network

Country Destination Domain Proto
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.in-addr.arpa udp

Files

memory/64-0-0x0000000000B4C000-0x0000000000BDF000-memory.dmp

memory/64-1-0x0000000000AD0000-0x0000000000BDF000-memory.dmp

memory/64-2-0x0000000000B4C000-0x0000000000BDF000-memory.dmp