Malware Analysis Report

2025-04-13 23:46

Sample ID 250103-2g9ghazkfm
Target JaffaCakes118_7216d9dc775aa07fd412d4d0642aaebf
SHA256 151f293e32a9f1c4af8347a53fb5651b7930cf855241bb3d92a869c5e721163b
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

151f293e32a9f1c4af8347a53fb5651b7930cf855241bb3d92a869c5e721163b

Threat Level: Known bad

The file JaffaCakes118_7216d9dc775aa07fd412d4d0642aaebf 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

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-03 22:34

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-03 22:34

Reported

2025-01-03 22:36

Platform

win7-20240903-en

Max time kernel

120s

Max time network

121s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7216d9dc775aa07fd412d4d0642aaebf.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_7216d9dc775aa07fd412d4d0642aaebf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7216d9dc775aa07fd412d4d0642aaebf.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7216d9dc775aa07fd412d4d0642aaebf.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1860 -s 160

Network

N/A

Files

memory/1860-0-0x0000000000A70000-0x0000000000B04000-memory.dmp

memory/1860-1-0x0000000000A00000-0x0000000000B04000-memory.dmp

memory/1860-2-0x0000000000A70000-0x0000000000B04000-memory.dmp

memory/1860-3-0x0000000000A00000-0x0000000000B04000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-03 22:34

Reported

2025-01-03 22:36

Platform

win10v2004-20241007-en

Max time kernel

96s

Max time network

97s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7216d9dc775aa07fd412d4d0642aaebf.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_7216d9dc775aa07fd412d4d0642aaebf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7216d9dc775aa07fd412d4d0642aaebf.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_7216d9dc775aa07fd412d4d0642aaebf.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 376 -p 208 -ip 208

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 208 -s 476

Network

Country Destination Domain Proto
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 71.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 29.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 60.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 241.150.49.20.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

memory/208-0-0x0000000000580000-0x0000000000614000-memory.dmp

memory/208-1-0x0000000000510000-0x0000000000614000-memory.dmp

memory/208-2-0x0000000000580000-0x0000000000614000-memory.dmp

memory/208-3-0x0000000000510000-0x0000000000614000-memory.dmp