Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-lj6wdsxbma
Target 3c1515f5f55282c116ad9ba9547c9121.zip
SHA256 c5939fd8fc146c4433e8bff31040c4ac880ae69b1afd174be3ca779c3481369e
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

c5939fd8fc146c4433e8bff31040c4ac880ae69b1afd174be3ca779c3481369e

Threat Level: Known bad

The file 3c1515f5f55282c116ad9ba9547c9121.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 09:34

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 09:34

Reported

2024-08-31 09:37

Platform

win7-20240705-en

Max time kernel

119s

Max time network

120s

Command Line

"C:\Users\Admin\AppData\Local\Temp\369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2.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\369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2.exe

"C:\Users\Admin\AppData\Local\Temp\369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2644 -s 160

Network

N/A

Files

memory/2644-0-0x0000000000130000-0x00000000001C4000-memory.dmp

memory/2644-1-0x00000000000C0000-0x00000000001C4000-memory.dmp

memory/2644-2-0x0000000000130000-0x00000000001C4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 09:34

Reported

2024-08-31 09:37

Platform

win10v2004-20240802-en

Max time kernel

140s

Max time network

133s

Command Line

"C:\Users\Admin\AppData\Local\Temp\369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2.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\369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2.exe

"C:\Users\Admin\AppData\Local\Temp\369e4db219ce55a7f90c19dedf84081a1e4471b04a9465d664d3985b758569a2.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5076 -ip 5076

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5076 -s 476

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=4148,i,7447299413640964517,4240724842020506306,262144 --variations-seed-version --mojo-platform-channel-handle=1288 /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.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
US 8.8.8.8:53 137.71.105.51.in-addr.arpa udp

Files

memory/5076-0-0x0000000000B30000-0x0000000000BC4000-memory.dmp

memory/5076-1-0x0000000000AC0000-0x0000000000BC4000-memory.dmp

memory/5076-2-0x0000000000B30000-0x0000000000BC4000-memory.dmp

memory/5076-3-0x0000000000AC0000-0x0000000000BC4000-memory.dmp