Malware Analysis Report

2025-01-18 15:58

Sample ID 240304-11f4mafg53
Target b33765481c44033b5016331146e40022
SHA256 d46ed3025a63aaea60d748935a64dd2d95533eaaf29a4ffd68ea0cc924e95055
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

d46ed3025a63aaea60d748935a64dd2d95533eaaf29a4ffd68ea0cc924e95055

Threat Level: Known bad

The file b33765481c44033b5016331146e40022 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 22:06

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-04 22:06

Reported

2024-03-04 22:09

Platform

win7-20240221-en

Max time kernel

141s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b33765481c44033b5016331146e40022.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\b33765481c44033b5016331146e40022.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b33765481c44033b5016331146e40022.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2028 -s 308

Network

N/A

Files

memory/2028-1-0x0000000000210000-0x0000000000216000-memory.dmp

memory/2028-0-0x0000000075260000-0x0000000075290000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-04 22:06

Reported

2024-03-04 22:09

Platform

win10v2004-20240226-en

Max time kernel

148s

Max time network

153s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b33765481c44033b5016331146e40022.dll,#1

Signatures

Dridex

botnet dridex

Dridex Loader

botnet loader
Description Indicator Process Target
N/A N/A N/A N/A
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 4216 wrote to memory of 3592 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4216 wrote to memory of 3592 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4216 wrote to memory of 3592 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\b33765481c44033b5016331146e40022.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b33765481c44033b5016331146e40022.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 3592 -ip 3592

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3592 -s 688

Network

Country Destination Domain Proto
US 8.8.8.8:53 68.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 23.178.78.104.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 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 162.177.78.104.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 200.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 18.173.189.20.in-addr.arpa udp

Files

memory/3592-0-0x0000000000FF0000-0x0000000000FF6000-memory.dmp

memory/3592-1-0x0000000075280000-0x00000000752B0000-memory.dmp

memory/3592-2-0x0000000075280000-0x00000000752B0000-memory.dmp

memory/3592-3-0x0000000000FF0000-0x0000000000FF6000-memory.dmp