Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-gx47hazbqk
Target ca29ba90f0ba302e70dcc107cec7cc26.zip
SHA256 37b51feccf291164de3b2f02b5a99bc4ad86273527bb1d88e19786e66852a9ae
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

37b51feccf291164de3b2f02b5a99bc4ad86273527bb1d88e19786e66852a9ae

Threat Level: Known bad

The file ca29ba90f0ba302e70dcc107cec7cc26.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

2024-08-31 06:12

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 06:11

Reported

2024-08-31 06:14

Platform

win7-20240704-en

Max time kernel

11s

Max time network

15s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4458bf4125bfc990db039e6b488ea69817af9c4627c1af8d7b40d0182bba7da8.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\4458bf4125bfc990db039e6b488ea69817af9c4627c1af8d7b40d0182bba7da8.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4458bf4125bfc990db039e6b488ea69817af9c4627c1af8d7b40d0182bba7da8.exe

"C:\Users\Admin\AppData\Local\Temp\4458bf4125bfc990db039e6b488ea69817af9c4627c1af8d7b40d0182bba7da8.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2540 -s 156

Network

N/A

Files

memory/2540-0-0x000000000139E000-0x0000000001431000-memory.dmp

memory/2540-1-0x0000000000C50000-0x0000000001431000-memory.dmp

memory/2540-2-0x000000000139E000-0x0000000001431000-memory.dmp

memory/2540-3-0x0000000000C50000-0x0000000001431000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 06:11

Reported

2024-08-31 06:14

Platform

win10v2004-20240802-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4458bf4125bfc990db039e6b488ea69817af9c4627c1af8d7b40d0182bba7da8.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\4458bf4125bfc990db039e6b488ea69817af9c4627c1af8d7b40d0182bba7da8.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4458bf4125bfc990db039e6b488ea69817af9c4627c1af8d7b40d0182bba7da8.exe

"C:\Users\Admin\AppData\Local\Temp\4458bf4125bfc990db039e6b488ea69817af9c4627c1af8d7b40d0182bba7da8.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2256 -ip 2256

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2256 -s 424

Network

Country Destination Domain Proto
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.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 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 192.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.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 8.8.8.8:53 udp

Files

memory/2256-0-0x0000000000A5E000-0x0000000000AF1000-memory.dmp

memory/2256-1-0x0000000000310000-0x0000000000AF1000-memory.dmp

memory/2256-2-0x0000000000A5E000-0x0000000000AF1000-memory.dmp

memory/2256-3-0x0000000000310000-0x0000000000AF1000-memory.dmp