Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-j48jlstfqq
Target dcd5569afa621f11e18269a237b4bc200a0b23c97d4f4d54d9fa37234c7d26b3
SHA256 dcd5569afa621f11e18269a237b4bc200a0b23c97d4f4d54d9fa37234c7d26b3
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

dcd5569afa621f11e18269a237b4bc200a0b23c97d4f4d54d9fa37234c7d26b3

Threat Level: Known bad

The file dcd5569afa621f11e18269a237b4bc200a0b23c97d4f4d54d9fa37234c7d26b3 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 08:14

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 08:14

Reported

2024-08-31 08:17

Platform

win7-20240729-en

Max time kernel

16s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.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\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe

"C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2540 -s 160

Network

N/A

Files

memory/2540-0-0x0000000000D30000-0x0000000000DC4000-memory.dmp

memory/2540-1-0x0000000000CC0000-0x0000000000DC4000-memory.dmp

memory/2540-2-0x0000000000D30000-0x0000000000DC4000-memory.dmp

memory/2540-3-0x0000000000CC0000-0x0000000000DC4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 08:14

Reported

2024-08-31 08:17

Platform

win10v2004-20240802-en

Max time kernel

130s

Max time network

98s

Command Line

"C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.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\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe

"C:\Users\Admin\AppData\Local\Temp\b1cbe50c00ba8c397d2eabe9d0c2ebc9fc175455f9a6c9ea0b481f79ff7cab8f.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 740 -ip 740

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 740 -s 476

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 73.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 150.171.28.10:443 g.bing.com tcp
US 8.8.8.8:53 136.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 24.139.73.23.in-addr.arpa udp
US 8.8.8.8:53 172.214.232.199.in-addr.arpa udp
US 8.8.8.8:53 13.227.111.52.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 150.171.27.10:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 udp

Files

memory/740-0-0x0000000000340000-0x00000000003D4000-memory.dmp

memory/740-1-0x00000000002D0000-0x00000000003D4000-memory.dmp

memory/740-2-0x0000000000340000-0x00000000003D4000-memory.dmp

memory/740-3-0x00000000002D0000-0x00000000003D4000-memory.dmp