Malware Analysis Report

2025-04-13 23:46

Sample ID 250103-xx9d8aypax
Target JaffaCakes118_6eec5de629ed5c66ca3f34284af83098
SHA256 16e6d4e525a305d0fd821d77850fa1e47bc67d5fffd06e5a06714b0c177de2b0
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

16e6d4e525a305d0fd821d77850fa1e47bc67d5fffd06e5a06714b0c177de2b0

Threat Level: Known bad

The file JaffaCakes118_6eec5de629ed5c66ca3f34284af83098 was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro family

Expiro, m0yv

Expiro payload

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-03 19:15

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-03 19:15

Reported

2025-01-03 19:17

Platform

win7-20240903-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6eec5de629ed5c66ca3f34284af83098.exe"

Signatures

Expiro family

expiro

Expiro, m0yv

backdoor expiro

Expiro payload

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

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6eec5de629ed5c66ca3f34284af83098.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6eec5de629ed5c66ca3f34284af83098.exe"

Network

N/A

Files

memory/2068-0-0x0000000000400000-0x000000000054D000-memory.dmp

memory/2068-1-0x0000000000400000-0x000000000054D000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-03 19:15

Reported

2025-01-03 19:17

Platform

win10v2004-20241007-en

Max time kernel

149s

Max time network

150s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6eec5de629ed5c66ca3f34284af83098.exe"

Signatures

Expiro family

expiro

Expiro, m0yv

backdoor expiro

Expiro payload

backdoor
Description Indicator Process Target
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_6eec5de629ed5c66ca3f34284af83098.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6eec5de629ed5c66ca3f34284af83098.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6eec5de629ed5c66ca3f34284af83098.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 1816 -ip 1816

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1816 -s 268

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 0.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 241.42.69.40.in-addr.arpa udp
US 8.8.8.8:53 85.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 21.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp

Files

memory/1816-0-0x0000000000400000-0x000000000054D000-memory.dmp

memory/1816-1-0x0000000000400000-0x000000000054D000-memory.dmp