Malware Analysis Report

2025-01-22 23:17

Sample ID 240916-rvdlwaseme
Target Backdoor.Win32.Berbew.pz-4684cd575d4eb366c0f2854e85cf15d6ba9554e092be06b7ce588b7b900c09f8N
SHA256 4684cd575d4eb366c0f2854e85cf15d6ba9554e092be06b7ce588b7b900c09f8
Tags
berbew 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

4684cd575d4eb366c0f2854e85cf15d6ba9554e092be06b7ce588b7b900c09f8

Threat Level: Known bad

The file Backdoor.Win32.Berbew.pz-4684cd575d4eb366c0f2854e85cf15d6ba9554e092be06b7ce588b7b900c09f8N was found to be: Known bad.

Malicious Activity Summary

berbew backdoor discovery

Berbew

Drops file in System32 directory

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-09-16 14:30

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-09-16 14:30

Reported

2024-09-16 14:32

Platform

win7-20240903-en

Max time kernel

91s

Max time network

19s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe"

Signatures

Berbew

backdoor berbew

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\ÿs.e¢e C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe N/A
File opened for modification C:\Windows\SysWOW64\ÿs.e¢e C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe 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\Backdoor.Win32.Berbew.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe

"C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3028 -s 144

Network

N/A

Files

memory/3028-0-0x0000000000400000-0x0000000000441000-memory.dmp

memory/3028-3-0x0000000000400000-0x0000000000441000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-09-16 14:30

Reported

2024-09-16 14:32

Platform

win10v2004-20240802-en

Max time kernel

94s

Max time network

95s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe"

Signatures

Berbew

backdoor berbew

Drops file in System32 directory

Description Indicator Process Target
File created C:\Windows\SysWOW64\ÿs.e¢e C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe N/A
File opened for modification C:\Windows\SysWOW64\ÿs.e¢e C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe 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\Backdoor.Win32.Berbew.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe

"C:\Users\Admin\AppData\Local\Temp\Backdoor.Win32.Berbew.exe"

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 368 -p 4240 -ip 4240

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4240 -s 432

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 233.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp

Files

memory/4240-0-0x0000000000400000-0x0000000000441000-memory.dmp

memory/4240-1-0x0000000000431000-0x0000000000432000-memory.dmp

memory/4240-4-0x0000000000400000-0x0000000000441000-memory.dmp