Malware Analysis Report

2024-10-23 20:58

Sample ID 240901-tldlmavhjp
Target e1a7b4cbe8e8aabce05747a34ce3a875.zip
SHA256 c2c268a37d16d52f7b0fcdcbc49a86de1283b22b8c858a0f81497d70b4e1cf0d
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

c2c268a37d16d52f7b0fcdcbc49a86de1283b22b8c858a0f81497d70b4e1cf0d

Threat Level: Known bad

The file e1a7b4cbe8e8aabce05747a34ce3a875.zip was found to be: Known bad.

Malicious Activity Summary

expiro backdoor discovery

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

2024-09-01 16:08

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-01 16:08

Reported

2024-09-01 16:11

Platform

win7-20240704-en

Max time kernel

15s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4317afbf25f7145ec2e84eee745d09c9f6e8a0973a460892fc4fa76595bfa319.exe"

Signatures

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\4317afbf25f7145ec2e84eee745d09c9f6e8a0973a460892fc4fa76595bfa319.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4317afbf25f7145ec2e84eee745d09c9f6e8a0973a460892fc4fa76595bfa319.exe

"C:\Users\Admin\AppData\Local\Temp\4317afbf25f7145ec2e84eee745d09c9f6e8a0973a460892fc4fa76595bfa319.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1656 -s 156

Network

N/A

Files

memory/1656-0-0x00000000018EE000-0x0000000001981000-memory.dmp

memory/1656-1-0x00000000011A0000-0x0000000001981000-memory.dmp

memory/1656-2-0x00000000018EE000-0x0000000001981000-memory.dmp

memory/1656-3-0x00000000011A0000-0x0000000001981000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-01 16:08

Reported

2024-09-01 16:11

Platform

win10v2004-20240802-en

Max time kernel

93s

Max time network

99s

Command Line

"C:\Users\Admin\AppData\Local\Temp\4317afbf25f7145ec2e84eee745d09c9f6e8a0973a460892fc4fa76595bfa319.exe"

Signatures

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\4317afbf25f7145ec2e84eee745d09c9f6e8a0973a460892fc4fa76595bfa319.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\4317afbf25f7145ec2e84eee745d09c9f6e8a0973a460892fc4fa76595bfa319.exe

"C:\Users\Admin\AppData\Local\Temp\4317afbf25f7145ec2e84eee745d09c9f6e8a0973a460892fc4fa76595bfa319.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 460 -ip 460

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 460 -s 428

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 79.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 138.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 77.190.18.2.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp

Files

memory/460-0-0x0000000000A4E000-0x0000000000AE1000-memory.dmp

memory/460-1-0x0000000000300000-0x0000000000AE1000-memory.dmp

memory/460-2-0x0000000000A4E000-0x0000000000AE1000-memory.dmp

memory/460-3-0x0000000000300000-0x0000000000AE1000-memory.dmp