Malware Analysis Report

2024-10-23 20:58

Sample ID 240410-z9mr4abh32
Target ec05ba8e2cc3cbbccfc1078fab5a83c0_JaffaCakes118
SHA256 6237c749f929fd924e2ea3869889e290e49feadcea431a036978bad8b990212e
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

6237c749f929fd924e2ea3869889e290e49feadcea431a036978bad8b990212e

Threat Level: Known bad

The file ec05ba8e2cc3cbbccfc1078fab5a83c0_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

2024-04-10 21:25

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-10 21:25

Reported

2024-04-10 21:27

Platform

win7-20240221-en

Max time kernel

122s

Max time network

126s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ec05ba8e2cc3cbbccfc1078fab5a83c0_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

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\ec05ba8e2cc3cbbccfc1078fab5a83c0_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ec05ba8e2cc3cbbccfc1078fab5a83c0_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2000 -s 124

Network

N/A

Files

memory/2000-1-0x0000000000FB0000-0x0000000001103000-memory.dmp

memory/2000-0-0x0000000000FB0000-0x0000000001103000-memory.dmp

memory/2000-2-0x0000000000FB0000-0x0000000001103000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-10 21:25

Reported

2024-04-10 21:27

Platform

win10v2004-20240319-en

Max time kernel

147s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\ec05ba8e2cc3cbbccfc1078fab5a83c0_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\ec05ba8e2cc3cbbccfc1078fab5a83c0_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\ec05ba8e2cc3cbbccfc1078fab5a83c0_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 3140 -ip 3140

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3140 -s 336

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=3392 --field-trial-handle=2148,i,1752153415760610784,11376271161549019716,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
IE 94.245.104.56:443 tcp
GB 51.140.242.104:443 tcp
US 8.8.8.8:53 154.173.246.72.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
GB 51.11.108.188:443 tcp
US 8.8.8.8:53 134.71.91.104.in-addr.arpa udp
US 8.8.8.8:53 240.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 7.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 140.71.91.104.in-addr.arpa udp
GB 13.105.221.15:443 tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 9.173.189.20.in-addr.arpa udp

Files

memory/3140-0-0x0000000000540000-0x0000000000693000-memory.dmp

memory/3140-1-0x0000000000540000-0x0000000000693000-memory.dmp

memory/3140-2-0x0000000000540000-0x0000000000693000-memory.dmp