Malware Analysis Report

2024-10-19 08:14

Sample ID 240417-ahawsagc58
Target f4a239b50820825fb1c52aa4ebea2d7e_JaffaCakes118
SHA256 8560f0d726398fafd868b28403ccd79f32eaa3adc4c7f9289519bfe52dcfed25
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

8560f0d726398fafd868b28403ccd79f32eaa3adc4c7f9289519bfe52dcfed25

Threat Level: Known bad

The file f4a239b50820825fb1c52aa4ebea2d7e_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

2024-04-17 00:12

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-04-17 00:12

Reported

2024-04-17 00:14

Platform

win7-20240221-en

Max time kernel

119s

Max time network

123s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f4a239b50820825fb1c52aa4ebea2d7e_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\f4a239b50820825fb1c52aa4ebea2d7e_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\f4a239b50820825fb1c52aa4ebea2d7e_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2340 -s 144

Network

N/A

Files

memory/2340-0-0x0000000000890000-0x000000000099F000-memory.dmp

memory/2340-1-0x0000000000890000-0x000000000099F000-memory.dmp

memory/2340-2-0x0000000000890000-0x000000000099F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-04-17 00:12

Reported

2024-04-17 00:15

Platform

win10v2004-20240412-en

Max time kernel

121s

Max time network

175s

Command Line

"C:\Users\Admin\AppData\Local\Temp\f4a239b50820825fb1c52aa4ebea2d7e_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\f4a239b50820825fb1c52aa4ebea2d7e_JaffaCakes118.exe

"C:\Users\Admin\AppData\Local\Temp\f4a239b50820825fb1c52aa4ebea2d7e_JaffaCakes118.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4636 -ip 4636

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4636 -s 532

Network

Country Destination Domain Proto
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 21.114.53.23.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
NL 23.62.61.97:443 www.bing.com tcp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 97.61.62.23.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 249.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 203.197.17.2.in-addr.arpa udp
US 8.8.8.8:53 131.72.42.20.in-addr.arpa udp

Files

memory/4636-0-0x0000000000B40000-0x0000000000C4F000-memory.dmp

memory/4636-1-0x0000000000B40000-0x0000000000C4F000-memory.dmp

memory/4636-2-0x0000000000B40000-0x0000000000C4F000-memory.dmp