Malware Analysis Report

2025-01-18 15:56

Sample ID 240306-w284ksfa77
Target b81382be175d2deb65cc759bcc99aeea
SHA256 799bf60d33c37aa61ae62bf7ac4317970e98f68d07d5dda319f48aeb359bbe2a
Tags
dridex 22201 botnet loader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

799bf60d33c37aa61ae62bf7ac4317970e98f68d07d5dda319f48aeb359bbe2a

Threat Level: Known bad

The file b81382be175d2deb65cc759bcc99aeea was found to be: Known bad.

Malicious Activity Summary

dridex 22201 botnet loader

Dridex

Dridex Loader

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-03-06 18:26

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-06 18:26

Reported

2024-03-06 18:28

Platform

win10v2004-20240226-en

Max time kernel

138s

Max time network

144s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b81382be175d2deb65cc759bcc99aeea.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 1900 wrote to memory of 2828 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1900 wrote to memory of 2828 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1900 wrote to memory of 2828 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\b81382be175d2deb65cc759bcc99aeea.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b81382be175d2deb65cc759bcc99aeea.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2828 -ip 2828

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2828 -s 664

Network

Country Destination Domain Proto
US 8.8.8.8:53 72.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 24.179.17.96.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 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.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 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 20.231.121.79:80 tcp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 100.5.17.2.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 36.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 14.227.111.52.in-addr.arpa udp

Files

memory/2828-0-0x0000000075530000-0x0000000075560000-memory.dmp

memory/2828-1-0x0000000000D30000-0x0000000000D36000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-06 18:26

Reported

2024-03-06 18:28

Platform

win7-20240221-en

Max time kernel

140s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b81382be175d2deb65cc759bcc99aeea.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\b81382be175d2deb65cc759bcc99aeea.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b81382be175d2deb65cc759bcc99aeea.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2012 -s 300

Network

N/A

Files

memory/2012-0-0x00000000754F0000-0x0000000075520000-memory.dmp

memory/2012-1-0x00000000001D0000-0x00000000001D6000-memory.dmp