Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-ezlf3awaka
Target 9eab5d6f597d5f8492f737140b536bf7.zip
SHA256 dcd5569afa621f11e18269a237b4bc200a0b23c97d4f4d54d9fa37234c7d26b3
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

dcd5569afa621f11e18269a237b4bc200a0b23c97d4f4d54d9fa37234c7d26b3

Threat Level: Known bad

The file 9eab5d6f597d5f8492f737140b536bf7.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 04:22

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 04:22

Reported

2024-08-31 04:25

Platform

win7-20240704-en

Max time kernel

15s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.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\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe

"C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2800 -s 160

Network

N/A

Files

memory/2800-0-0x0000000000980000-0x0000000000A14000-memory.dmp

memory/2800-1-0x0000000000910000-0x0000000000A14000-memory.dmp

memory/2800-2-0x0000000000980000-0x0000000000A14000-memory.dmp

memory/2800-3-0x0000000000910000-0x0000000000A14000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 04:22

Reported

2024-08-31 04:25

Platform

win10v2004-20240802-en

Max time kernel

141s

Max time network

113s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.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\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe

"C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4168 -ip 4168

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4168 -s 476

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.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 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.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

Files

memory/4168-0-0x0000000000500000-0x0000000000594000-memory.dmp

memory/4168-1-0x0000000000490000-0x0000000000594000-memory.dmp

memory/4168-2-0x0000000000500000-0x0000000000594000-memory.dmp

memory/4168-3-0x0000000000490000-0x0000000000594000-memory.dmp