Malware Analysis Report

2025-04-13 23:46

Sample ID 250103-s92gxsvjgq
Target JaffaCakes118_6dbaa3024b9d157f41620afae069d709
SHA256 a30d56e5191331af35183391ecf6ea1bd45dccea1fbeb0a7e6f6933bf7f209fd
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

a30d56e5191331af35183391ecf6ea1bd45dccea1fbeb0a7e6f6933bf7f209fd

Threat Level: Known bad

The file JaffaCakes118_6dbaa3024b9d157f41620afae069d709 was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro family

Expiro, m0yv

Expiro payload

System Location Discovery: System Language Discovery

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-03 15:50

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-03 15:50

Reported

2025-01-03 15:52

Platform

win7-20240708-en

Max time kernel

121s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe"

Signatures

Expiro family

expiro

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\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2680 -s 68

Network

N/A

Files

memory/2680-0-0x000000000140C000-0x000000000149F000-memory.dmp

memory/2680-1-0x00000000013A0000-0x000000000149F000-memory.dmp

memory/2680-2-0x000000000140C000-0x000000000149F000-memory.dmp

memory/2680-3-0x00000000013A0000-0x000000000149F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-03 15:50

Reported

2025-01-03 15:52

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

143s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe"

Signatures

Expiro family

expiro

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\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6dbaa3024b9d157f41620afae069d709.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 124 -p 1664 -ip 1664

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1664 -s 252

Network

Country Destination Domain Proto
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 8.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 56.163.245.4.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 60.153.16.2.in-addr.arpa udp

Files

memory/1664-0-0x000000000053C000-0x00000000005CF000-memory.dmp

memory/1664-1-0x00000000004D0000-0x00000000005CF000-memory.dmp

memory/1664-2-0x000000000053C000-0x00000000005CF000-memory.dmp

memory/1664-3-0x00000000004D0000-0x00000000005CF000-memory.dmp