Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-mzwk2azdpb
Target 93a4bb1b1672d07128cc01f98ee00e5f.zip
SHA256 05de2df1e9fc636609699c34ed21cec85b170e9106ab67ddd79ce84ea59881ce
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

05de2df1e9fc636609699c34ed21cec85b170e9106ab67ddd79ce84ea59881ce

Threat Level: Known bad

The file 93a4bb1b1672d07128cc01f98ee00e5f.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 10:54

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 10:54

Reported

2024-08-31 10:57

Platform

win7-20240708-en

Max time kernel

118s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7ae99c71371709eb39b02255de36dea86a91ac461dba0e04db1dccbfff2f9039.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\7ae99c71371709eb39b02255de36dea86a91ac461dba0e04db1dccbfff2f9039.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7ae99c71371709eb39b02255de36dea86a91ac461dba0e04db1dccbfff2f9039.exe

"C:\Users\Admin\AppData\Local\Temp\7ae99c71371709eb39b02255de36dea86a91ac461dba0e04db1dccbfff2f9039.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2516 -s 68

Network

N/A

Files

memory/2516-0-0x000000000040C000-0x000000000049F000-memory.dmp

memory/2516-1-0x00000000003A0000-0x000000000049F000-memory.dmp

memory/2516-2-0x000000000040C000-0x000000000049F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 10:54

Reported

2024-08-31 10:57

Platform

win10v2004-20240802-en

Max time kernel

134s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\7ae99c71371709eb39b02255de36dea86a91ac461dba0e04db1dccbfff2f9039.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\7ae99c71371709eb39b02255de36dea86a91ac461dba0e04db1dccbfff2f9039.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\7ae99c71371709eb39b02255de36dea86a91ac461dba0e04db1dccbfff2f9039.exe

"C:\Users\Admin\AppData\Local\Temp\7ae99c71371709eb39b02255de36dea86a91ac461dba0e04db1dccbfff2f9039.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 432 -p 1264 -ip 1264

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1264 -s 252

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.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 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp

Files

memory/1264-0-0x000000000032C000-0x00000000003BF000-memory.dmp

memory/1264-1-0x00000000002C0000-0x00000000003BF000-memory.dmp

memory/1264-3-0x00000000002C0000-0x00000000003BF000-memory.dmp

memory/1264-2-0x000000000032C000-0x00000000003BF000-memory.dmp