Malware Analysis Report

2025-04-13 23:46

Sample ID 250103-kdthfaymfq
Target JaffaCakes118_6b6177f3fa2164a5df5827fb67cea3e6
SHA256 2d54f3ad3067084cc1fe5abac3bce7f791f6d0b772df74911648d680ac2c6552
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

2d54f3ad3067084cc1fe5abac3bce7f791f6d0b772df74911648d680ac2c6552

Threat Level: Known bad

The file JaffaCakes118_6b6177f3fa2164a5df5827fb67cea3e6 was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

Expiro family

Expiro, m0yv

Expiro payload

Program crash

System Location Discovery: System Language Discovery

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2025-01-03 08:29

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2025-01-03 08:29

Reported

2025-01-03 08:32

Platform

win7-20240903-en

Max time kernel

122s

Max time network

122s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6b6177f3fa2164a5df5827fb67cea3e6.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_6b6177f3fa2164a5df5827fb67cea3e6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6b6177f3fa2164a5df5827fb67cea3e6.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6b6177f3fa2164a5df5827fb67cea3e6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2380 -s 156

Network

N/A

Files

memory/2380-0-0x00000000016EE000-0x0000000001781000-memory.dmp

memory/2380-1-0x0000000000FA0000-0x0000000001781000-memory.dmp

memory/2380-2-0x00000000016EE000-0x0000000001781000-memory.dmp

memory/2380-3-0x0000000000FA0000-0x0000000001781000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2025-01-03 08:29

Reported

2025-01-03 08:32

Platform

win10v2004-20241007-en

Max time kernel

94s

Max time network

134s

Command Line

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6b6177f3fa2164a5df5827fb67cea3e6.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_6b6177f3fa2164a5df5827fb67cea3e6.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6b6177f3fa2164a5df5827fb67cea3e6.exe

"C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_6b6177f3fa2164a5df5827fb67cea3e6.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 408 -ip 408

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 408 -s 424

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 60.153.16.2.in-addr.arpa udp
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 212.20.149.52.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 21.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 22.49.80.91.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp

Files

memory/408-0-0x0000000000BFE000-0x0000000000C91000-memory.dmp

memory/408-1-0x00000000004B0000-0x0000000000C91000-memory.dmp

memory/408-2-0x0000000000BFE000-0x0000000000C91000-memory.dmp

memory/408-3-0x00000000004B0000-0x0000000000C91000-memory.dmp