Malware Analysis Report

2024-10-23 20:59

Sample ID 240831-sx5c2s1dkr
Target bc5e8e9b72bf9c30accef0a83e8366d0N.exe
SHA256 8a591155989d755b6a72f1f829d2aa1fcc4de8f89dce646cc4cde6ee7304de8b
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

8a591155989d755b6a72f1f829d2aa1fcc4de8f89dce646cc4cde6ee7304de8b

Threat Level: Known bad

The file bc5e8e9b72bf9c30accef0a83e8366d0N.exe was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro, m0yv

Expiro payload

Unsigned PE

System Location Discovery: System Language Discovery

Program crash

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-31 15:31

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 15:31

Reported

2024-08-31 15:34

Platform

win7-20240708-en

Max time kernel

16s

Max time network

23s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bc5e8e9b72bf9c30accef0a83e8366d0N.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\bc5e8e9b72bf9c30accef0a83e8366d0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bc5e8e9b72bf9c30accef0a83e8366d0N.exe

"C:\Users\Admin\AppData\Local\Temp\bc5e8e9b72bf9c30accef0a83e8366d0N.exe"

Network

N/A

Files

memory/2364-0-0x0000000000DFD000-0x0000000000E2E000-memory.dmp

memory/2364-1-0x0000000000D30000-0x0000000000E2E000-memory.dmp

memory/2364-2-0x0000000000DFD000-0x0000000000E2E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 15:31

Reported

2024-08-31 15:34

Platform

win10v2004-20240802-en

Max time kernel

102s

Max time network

104s

Command Line

"C:\Users\Admin\AppData\Local\Temp\bc5e8e9b72bf9c30accef0a83e8366d0N.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\bc5e8e9b72bf9c30accef0a83e8366d0N.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\bc5e8e9b72bf9c30accef0a83e8366d0N.exe

"C:\Users\Admin\AppData\Local\Temp\bc5e8e9b72bf9c30accef0a83e8366d0N.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 4456 -ip 4456

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4456 -s 472

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 73.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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/4456-0-0x000000000036D000-0x000000000039E000-memory.dmp

memory/4456-1-0x00000000002A0000-0x000000000039E000-memory.dmp

memory/4456-2-0x000000000036D000-0x000000000039E000-memory.dmp