Malware Analysis Report

2025-04-13 23:45

Sample ID 250103-wfxhnaymer
Target JaffaCakes118_6e66e2708202490dc163ea10c2b736cb
SHA256 17e768b8b97d673d45f6c0a2187828fc0261c09b6ae92801012a9b17e5a1c698
Tags
expiro backdoor discovery
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

17e768b8b97d673d45f6c0a2187828fc0261c09b6ae92801012a9b17e5a1c698

Threat Level: Known bad

The file JaffaCakes118_6e66e2708202490dc163ea10c2b736cb was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro family

Expiro, m0yv

Expiro payload

Enumerates physical storage devices

System Location Discovery: System Language Discovery

Unsigned PE

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-03 17:52

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-03 17:52

Reported

2025-01-03 17:54

Platform

win10v2004-20241007-en

Max time kernel

93s

Max time network

144s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6e66e2708202490dc163ea10c2b736cb.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

Enumerates physical storage devices

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_6e66e2708202490dc163ea10c2b736cb.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6e66e2708202490dc163ea10c2b736cb.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6e66e2708202490dc163ea10c2b736cb.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 86.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 133.211.185.52.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 8.8.8.8:53 167.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 8.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 20.49.80.91.in-addr.arpa udp

Files

memory/3388-0-0x0000000000400000-0x0000000000653000-memory.dmp

memory/3388-1-0x0000000000419000-0x000000000041A000-memory.dmp

memory/3388-2-0x0000000000400000-0x0000000000653000-memory.dmp

memory/3388-4-0x0000000000400000-0x0000000000653000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-03 17:52

Reported

2025-01-03 17:54

Platform

win7-20241023-en

Max time kernel

118s

Max time network

119s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6e66e2708202490dc163ea10c2b736cb.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

Enumerates physical storage devices

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_6e66e2708202490dc163ea10c2b736cb.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6e66e2708202490dc163ea10c2b736cb.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6e66e2708202490dc163ea10c2b736cb.exe"

Network

N/A

Files

memory/2128-0-0x0000000000400000-0x0000000000653000-memory.dmp

memory/2128-1-0x0000000000419000-0x000000000041A000-memory.dmp

memory/2128-5-0x0000000000400000-0x0000000000653000-memory.dmp

memory/2128-9-0x0000000000400000-0x0000000000653000-memory.dmp