Malware Analysis Report

2024-10-19 08:15

Sample ID 240416-j8c89sdc45
Target f313d3e6c2801f793fcc4a28f0f9cab6_JaffaCakes118
SHA256 4c364520eb3460b2b770570f16569e7cc422ee282afd706ab7aed05fb3eddc59
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

4c364520eb3460b2b770570f16569e7cc422ee282afd706ab7aed05fb3eddc59

Threat Level: Known bad

The file f313d3e6c2801f793fcc4a28f0f9cab6_JaffaCakes118 was found to be: Known bad.

Malicious Activity Summary

expiro backdoor

Expiro, m0yv

Expiro payload

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-04-16 08:19

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-16 08:19

Reported

2024-04-16 08:22

Platform

win7-20240221-en

Max time kernel

117s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f313d3e6c2801f793fcc4a28f0f9cab6_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\f313d3e6c2801f793fcc4a28f0f9cab6_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\f313d3e6c2801f793fcc4a28f0f9cab6_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3044 -s 124

Network

N/A

Files

memory/3044-0-0x0000000000990000-0x0000000000AE3000-memory.dmp

memory/3044-1-0x0000000000990000-0x0000000000AE3000-memory.dmp

memory/3044-2-0x0000000000990000-0x0000000000AE3000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-16 08:19

Reported

2024-04-16 08:22

Platform

win10v2004-20240412-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f313d3e6c2801f793fcc4a28f0f9cab6_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\f313d3e6c2801f793fcc4a28f0f9cab6_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\f313d3e6c2801f793fcc4a28f0f9cab6_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4840 -ip 4840

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4840 -s 340

Network

Country Destination Domain Proto
US 8.8.8.8:53 71.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.237:443 g.bing.com tcp
US 8.8.8.8:53 237.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 139.136.73.23.in-addr.arpa udp
NL 23.62.61.99:443 www.bing.com tcp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 132.250.30.184.in-addr.arpa udp
US 8.8.8.8:53 99.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 203.142.123.92.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 252.15.104.51.in-addr.arpa udp

Files

memory/4840-0-0x0000000000E70000-0x0000000000FC3000-memory.dmp

memory/4840-1-0x0000000000E70000-0x0000000000FC3000-memory.dmp

memory/4840-2-0x0000000000E70000-0x0000000000FC3000-memory.dmp