Malware Analysis Report

2024-10-23 20:59

Sample ID 240831-rsgwhsyakm
Target fd803509cebeb8fde6b4e36a62b7b3400572bb74dc55521324caa849730a14bc
SHA256 fd803509cebeb8fde6b4e36a62b7b3400572bb74dc55521324caa849730a14bc
Tags
expiro backdoor discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

fd803509cebeb8fde6b4e36a62b7b3400572bb74dc55521324caa849730a14bc

Threat Level: Known bad

The file fd803509cebeb8fde6b4e36a62b7b3400572bb74dc55521324caa849730a14bc was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro, m0yv

Expiro payload

System Location Discovery: System Language Discovery

Unsigned PE

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-31 14:27

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 14:27

Reported

2024-08-31 14:29

Platform

win10v2004-20240802-en

Max time kernel

138s

Max time network

135s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ecf1c18fd8e00059f7408f943e96f73aa08839601eec0bc2588fcb3e9c29d137.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\ecf1c18fd8e00059f7408f943e96f73aa08839601eec0bc2588fcb3e9c29d137.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ecf1c18fd8e00059f7408f943e96f73aa08839601eec0bc2588fcb3e9c29d137.exe

"C:\Users\Admin\AppData\Local\Temp\ecf1c18fd8e00059f7408f943e96f73aa08839601eec0bc2588fcb3e9c29d137.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4360,i,7447299413640964517,4240724842020506306,262144 --variations-seed-version --mojo-platform-channel-handle=4408 /prefetch:8

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 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.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 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 10.27.171.150.in-addr.arpa udp
US 8.8.8.8:53 131.72.42.20.in-addr.arpa udp

Files

memory/1500-0-0x00000000008FB000-0x000000000098E000-memory.dmp

memory/1500-2-0x0000000000890000-0x000000000098E000-memory.dmp

memory/1500-1-0x00000000008FB000-0x000000000098E000-memory.dmp

memory/1500-3-0x0000000000890000-0x000000000098E000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 14:27

Reported

2024-08-31 14:29

Platform

win7-20240704-en

Max time kernel

119s

Max time network

127s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ecf1c18fd8e00059f7408f943e96f73aa08839601eec0bc2588fcb3e9c29d137.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\ecf1c18fd8e00059f7408f943e96f73aa08839601eec0bc2588fcb3e9c29d137.exe

"C:\Users\Admin\AppData\Local\Temp\ecf1c18fd8e00059f7408f943e96f73aa08839601eec0bc2588fcb3e9c29d137.exe"

Network

N/A

Files

memory/328-0-0x0000000000FBB000-0x000000000104E000-memory.dmp

memory/328-1-0x0000000000FBB000-0x000000000104E000-memory.dmp

memory/328-2-0x0000000000F50000-0x000000000104E000-memory.dmp

memory/328-3-0x0000000000F50000-0x000000000104E000-memory.dmp