Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-bb35eswhkj
Target 90a1400d3988b03b8af04ad8fe8cf8bf0751b27d018cc4f73a4e5aa2f6b9bebc
SHA256 90a1400d3988b03b8af04ad8fe8cf8bf0751b27d018cc4f73a4e5aa2f6b9bebc
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

90a1400d3988b03b8af04ad8fe8cf8bf0751b27d018cc4f73a4e5aa2f6b9bebc

Threat Level: Known bad

The file 90a1400d3988b03b8af04ad8fe8cf8bf0751b27d018cc4f73a4e5aa2f6b9bebc was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro, m0yv

Expiro payload

Unsigned PE

System Location Discovery: System Language Discovery

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-31 00:59

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 00:59

Reported

2024-08-31 01:01

Platform

win7-20240705-en

Max time kernel

120s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b64e2ed624b7d878d680265e2cb5bb0f824dea5e7decc7677b8ed5c06e6e8d95.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

Processes

C:\Users\Admin\AppData\Local\Temp\b64e2ed624b7d878d680265e2cb5bb0f824dea5e7decc7677b8ed5c06e6e8d95.exe

"C:\Users\Admin\AppData\Local\Temp\b64e2ed624b7d878d680265e2cb5bb0f824dea5e7decc7677b8ed5c06e6e8d95.exe"

Network

N/A

Files

memory/2224-0-0x0000000000A8B000-0x0000000000B1E000-memory.dmp

memory/2224-1-0x0000000000A8B000-0x0000000000B1E000-memory.dmp

memory/2224-2-0x0000000000A20000-0x0000000000B1E000-memory.dmp

memory/2224-3-0x0000000000A20000-0x0000000000B1E000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 00:59

Reported

2024-08-31 01:01

Platform

win10v2004-20240802-en

Max time kernel

148s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b64e2ed624b7d878d680265e2cb5bb0f824dea5e7decc7677b8ed5c06e6e8d95.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\b64e2ed624b7d878d680265e2cb5bb0f824dea5e7decc7677b8ed5c06e6e8d95.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b64e2ed624b7d878d680265e2cb5bb0f824dea5e7decc7677b8ed5c06e6e8d95.exe

"C:\Users\Admin\AppData\Local\Temp\b64e2ed624b7d878d680265e2cb5bb0f824dea5e7decc7677b8ed5c06e6e8d95.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.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
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp

Files

memory/5036-0-0x000000000093B000-0x00000000009CE000-memory.dmp

memory/5036-1-0x00000000008D0000-0x00000000009CE000-memory.dmp

memory/5036-3-0x000000000093B000-0x00000000009CE000-memory.dmp

memory/5036-2-0x00000000008D0000-0x00000000009CE000-memory.dmp