Malware Analysis Report

2024-10-19 08:16

Sample ID 240831-hlrmps1cka
Target d88dc6b1c9d9d0ce96c24003b2e22f3b.zip
SHA256 81c5897881bf8349d302c4f4b8798d16a0e12f80949b7585fe9f201360415660
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

81c5897881bf8349d302c4f4b8798d16a0e12f80949b7585fe9f201360415660

Threat Level: Known bad

The file d88dc6b1c9d9d0ce96c24003b2e22f3b.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

2024-08-31 06:49

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-31 06:49

Reported

2024-08-31 06:52

Platform

win7-20240705-en

Max time kernel

16s

Max time network

17s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90.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\5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90.exe

"C:\Users\Admin\AppData\Local\Temp\5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1476 -s 160

Network

N/A

Files

memory/1476-0-0x0000000001150000-0x00000000011E4000-memory.dmp

memory/1476-1-0x00000000010E0000-0x00000000011E4000-memory.dmp

memory/1476-2-0x0000000001150000-0x00000000011E4000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-31 06:49

Reported

2024-08-31 06:52

Platform

win10v2004-20240802-en

Max time kernel

134s

Max time network

139s

Command Line

"C:\Users\Admin\AppData\Local\Temp\5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90.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\5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90.exe

"C:\Users\Admin\AppData\Local\Temp\5e5b6780002d047e519ecc6b58048e9588f9762d67db468c720cd61c605ecb90.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 1608 -ip 1608

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1608 -s 480

Network

Country Destination Domain Proto
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 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 81.144.22.2.in-addr.arpa udp
US 8.8.8.8:53 58.99.105.20.in-addr.arpa udp
US 8.8.8.8:53 31.243.111.52.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

Files

memory/1608-0-0x0000000000D70000-0x0000000000E04000-memory.dmp

memory/1608-1-0x0000000000D00000-0x0000000000E04000-memory.dmp

memory/1608-2-0x0000000000D70000-0x0000000000E04000-memory.dmp

memory/1608-3-0x0000000000D00000-0x0000000000E04000-memory.dmp