Malware Analysis Report

2024-10-19 08:14

Sample ID 240416-xa4kfshe76
Target f416871f57f67c1356f930acd0d8617f_JaffaCakes118
SHA256 94cd30d1ed5158118ca5a2e9ddf6c5478f29c602cd0249faa21e5676ba5159ae
Tags
expiro backdoor
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

94cd30d1ed5158118ca5a2e9ddf6c5478f29c602cd0249faa21e5676ba5159ae

Threat Level: Known bad

The file f416871f57f67c1356f930acd0d8617f_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

expiro backdoor

Expiro, m0yv

Expiro payload

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-16 18:39

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-16 18:39

Reported

2024-04-16 18:42

Platform

win7-20240221-en

Max time kernel

121s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f416871f57f67c1356f930acd0d8617f_JaffaCakes118.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

Processes

C:\Users\Admin\AppData\Local\Temp\f416871f57f67c1356f930acd0d8617f_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\f416871f57f67c1356f930acd0d8617f_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1908 -s 156

Network

N/A

Files

memory/1908-0-0x00000000008B0000-0x0000000001091000-memory.dmp

memory/1908-1-0x00000000008B0000-0x0000000001091000-memory.dmp

memory/1908-2-0x00000000008B0000-0x0000000001091000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-16 18:39

Reported

2024-04-16 18:42

Platform

win10v2004-20240226-en

Max time kernel

138s

Max time network

158s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f416871f57f67c1356f930acd0d8617f_JaffaCakes118.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

Processes

C:\Users\Admin\AppData\Local\Temp\f416871f57f67c1356f930acd0d8617f_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\f416871f57f67c1356f930acd0d8617f_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 3544 -ip 3544

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3544 -s 432

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 --no-appcompat-clear --mojo-platform-channel-handle=3984 --field-trial-handle=2280,i,1836084024518340990,18250262151825427757,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
GB 142.250.187.202:443 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 24.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp

Files

memory/3544-0-0x0000000000FB0000-0x0000000001791000-memory.dmp

memory/3544-1-0x0000000000FB0000-0x0000000001791000-memory.dmp

memory/3544-2-0x0000000000FB0000-0x0000000001791000-memory.dmp