Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-dd5r5sscnl
Target 7f933f4e7451e1aa0c8b9c38c43a81c9.zip
SHA256 282d2a424083b7d21a870abf739d37eb99ecd04da017c199f62e1cbf5dbe0778
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

282d2a424083b7d21a870abf739d37eb99ecd04da017c199f62e1cbf5dbe0778

Threat Level: Known bad

The file 7f933f4e7451e1aa0c8b9c38c43a81c9.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

2024-08-31 02:54

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 02:54

Reported

2024-08-31 02:57

Platform

win7-20240729-en

Max time kernel

84s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c95b33c8f04267b719df3d1206dc2e7ec00f35cf5d26ff1b71a62fca8033cc2c.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\c95b33c8f04267b719df3d1206dc2e7ec00f35cf5d26ff1b71a62fca8033cc2c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c95b33c8f04267b719df3d1206dc2e7ec00f35cf5d26ff1b71a62fca8033cc2c.exe

"C:\Users\Admin\AppData\Local\Temp\c95b33c8f04267b719df3d1206dc2e7ec00f35cf5d26ff1b71a62fca8033cc2c.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2164 -s 64

Network

N/A

Files

memory/2164-0-0x000000000015B000-0x00000000001EE000-memory.dmp

memory/2164-1-0x00000000000F0000-0x00000000001EE000-memory.dmp

memory/2164-2-0x000000000015B000-0x00000000001EE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 02:54

Reported

2024-08-31 02:57

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\c95b33c8f04267b719df3d1206dc2e7ec00f35cf5d26ff1b71a62fca8033cc2c.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\c95b33c8f04267b719df3d1206dc2e7ec00f35cf5d26ff1b71a62fca8033cc2c.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\c95b33c8f04267b719df3d1206dc2e7ec00f35cf5d26ff1b71a62fca8033cc2c.exe

"C:\Users\Admin\AppData\Local\Temp\c95b33c8f04267b719df3d1206dc2e7ec00f35cf5d26ff1b71a62fca8033cc2c.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 412 -p 5008 -ip 5008

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5008 -s 256

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 23.236.111.52.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 10.28.171.150.in-addr.arpa udp

Files

memory/5008-0-0x000000000103B000-0x00000000010CE000-memory.dmp

memory/5008-1-0x0000000000FD0000-0x00000000010CE000-memory.dmp

memory/5008-2-0x000000000103B000-0x00000000010CE000-memory.dmp

memory/5008-3-0x0000000000FD0000-0x00000000010CE000-memory.dmp