Malware Analysis Report

2025-01-18 15:58

Sample ID 240304-l9vk2sfg5x
Target b1df6bb731ecc9f3fb20857b2cfc559f
SHA256 006e0f57154580997395e919047510a08086edad9ea6759b23dde3e75b6d50b1
Tags
dridex 22201 botnet loader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

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

006e0f57154580997395e919047510a08086edad9ea6759b23dde3e75b6d50b1

Threat Level: Known bad

The file b1df6bb731ecc9f3fb20857b2cfc559f was found to be: Known bad.

Malicious Activity Summary

dridex 22201 botnet loader

Dridex

Dridex Loader

Unsigned PE

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-03-04 10:14

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-04 10:14

Reported

2024-03-04 10:17

Platform

win7-20240221-en

Max time kernel

142s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1df6bb731ecc9f3fb20857b2cfc559f.dll,#1

Signatures

Dridex

botnet dridex

Dridex Loader

botnet loader
Description Indicator Process Target
N/A N/A N/A N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1df6bb731ecc9f3fb20857b2cfc559f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1df6bb731ecc9f3fb20857b2cfc559f.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2024 -s 308

Network

N/A

Files

memory/2024-1-0x0000000074BF0000-0x0000000074C20000-memory.dmp

memory/2024-0-0x00000000001E0000-0x00000000001E6000-memory.dmp

memory/2024-4-0x00000000001E0000-0x00000000001E6000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-04 10:14

Reported

2024-03-04 10:17

Platform

win10v2004-20240226-en

Max time kernel

92s

Max time network

127s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1df6bb731ecc9f3fb20857b2cfc559f.dll,#1

Signatures

Dridex

botnet dridex

Dridex Loader

botnet loader
Description Indicator Process Target
N/A N/A N/A N/A

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Windows\SysWOW64\rundll32.exe

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 3164 wrote to memory of 3952 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3164 wrote to memory of 3952 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3164 wrote to memory of 3952 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1df6bb731ecc9f3fb20857b2cfc559f.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1df6bb731ecc9f3fb20857b2cfc559f.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 192 -p 3952 -ip 3952

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3952 -s 692

Network

Country Destination Domain Proto
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.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 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 43.229.111.52.in-addr.arpa udp

Files

memory/3952-0-0x00000000758D0000-0x0000000075900000-memory.dmp

memory/3952-1-0x0000000002CE0000-0x0000000002CE6000-memory.dmp