Malware Analysis Report

2024-10-23 20:59

Sample ID 240831-pzba7stfnl
Target 5044679442b15f0bf4197d73b3ca20f1cc247ab62846662cacdc68bb94ebeb51
SHA256 5044679442b15f0bf4197d73b3ca20f1cc247ab62846662cacdc68bb94ebeb51
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

5044679442b15f0bf4197d73b3ca20f1cc247ab62846662cacdc68bb94ebeb51

Threat Level: Known bad

The file 5044679442b15f0bf4197d73b3ca20f1cc247ab62846662cacdc68bb94ebeb51 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

2024-08-31 12:45

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 12:45

Reported

2024-08-31 12:48

Platform

win7-20240705-en

Max time kernel

16s

Max time network

21s

Command Line

"C:\Users\Admin\AppData\Local\Temp\19bdba4c02f3e286b2d7047e76e25aad356748edcec95e37634face159894eb2.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

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\19bdba4c02f3e286b2d7047e76e25aad356748edcec95e37634face159894eb2.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\19bdba4c02f3e286b2d7047e76e25aad356748edcec95e37634face159894eb2.exe

"C:\Users\Admin\AppData\Local\Temp\19bdba4c02f3e286b2d7047e76e25aad356748edcec95e37634face159894eb2.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1740 -s 68

Network

N/A

Files

memory/1740-0-0x00000000001BC000-0x000000000024F000-memory.dmp

memory/1740-1-0x0000000000150000-0x000000000024F000-memory.dmp

memory/1740-2-0x00000000001BC000-0x000000000024F000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 12:45

Reported

2024-08-31 12:48

Platform

win10v2004-20240802-en

Max time kernel

150s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\19bdba4c02f3e286b2d7047e76e25aad356748edcec95e37634face159894eb2.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\19bdba4c02f3e286b2d7047e76e25aad356748edcec95e37634face159894eb2.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\19bdba4c02f3e286b2d7047e76e25aad356748edcec95e37634face159894eb2.exe

"C:\Users\Admin\AppData\Local\Temp\19bdba4c02f3e286b2d7047e76e25aad356748edcec95e37634face159894eb2.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 2888 -ip 2888

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2888 -s 252

Network

Country Destination Domain Proto
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.27.10:443 g.bing.com tcp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 104.219.191.52.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 65.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 205.47.74.20.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 55.36.223.20.in-addr.arpa udp
US 8.8.8.8:53 10.28.171.150.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/2888-0-0x00000000000EC000-0x000000000017F000-memory.dmp

memory/2888-1-0x0000000000080000-0x000000000017F000-memory.dmp

memory/2888-2-0x00000000000EC000-0x000000000017F000-memory.dmp

memory/2888-3-0x0000000000080000-0x000000000017F000-memory.dmp