Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-jk2a7asfqr
Target ee7da429fe5ec4209b01cfcc8d867cfa.zip
SHA256 48f9f84b900eb50860f735df91bc0c8655b3e4cb00467f2fb784e9b3adc8bf27
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

48f9f84b900eb50860f735df91bc0c8655b3e4cb00467f2fb784e9b3adc8bf27

Threat Level: Known bad

The file ee7da429fe5ec4209b01cfcc8d867cfa.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 07:44

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 07:44

Reported

2024-08-31 07:47

Platform

win7-20240705-en

Max time kernel

119s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6.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\54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6.exe

"C:\Users\Admin\AppData\Local\Temp\54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2976 -s 124

Network

N/A

Files

memory/2976-0-0x0000000000F3F000-0x0000000000FD2000-memory.dmp

memory/2976-1-0x0000000000E80000-0x0000000000FD2000-memory.dmp

memory/2976-2-0x0000000000F3F000-0x0000000000FD2000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 07:44

Reported

2024-08-31 07:47

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

154s

Command Line

"C:\Users\Admin\AppData\Local\Temp\54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6.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\54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6.exe

"C:\Users\Admin\AppData\Local\Temp\54e823e778135245e1ac095fd6af3320dc8235dfdb1f973144ecb5a532ac45a6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 2044 -ip 2044

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2044 -s 336

Network

Country Destination Domain Proto
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 17.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.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/2044-0-0x0000000000C0F000-0x0000000000CA2000-memory.dmp

memory/2044-1-0x0000000000B50000-0x0000000000CA2000-memory.dmp

memory/2044-2-0x0000000000C0F000-0x0000000000CA2000-memory.dmp

memory/2044-3-0x0000000000B50000-0x0000000000CA2000-memory.dmp