Malware Analysis Report

2025-01-18 15:58

Sample ID 240304-bx88kaec3s
Target b0e4aeb6fe30a56452cc4bda87b5f3cf
SHA256 8b6af50c736ea07895f5e881a51bf5b26c533c739b187d4cf281ea6b61af553f
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

8b6af50c736ea07895f5e881a51bf5b26c533c739b187d4cf281ea6b61af553f

Threat Level: Known bad

The file b0e4aeb6fe30a56452cc4bda87b5f3cf 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

2024-03-04 01:32

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-04 01:32

Reported

2024-03-04 01:35

Platform

win7-20240221-en

Max time kernel

143s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b0e4aeb6fe30a56452cc4bda87b5f3cf.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\b0e4aeb6fe30a56452cc4bda87b5f3cf.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b0e4aeb6fe30a56452cc4bda87b5f3cf.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2204 -s 308

Network

N/A

Files

memory/2204-1-0x00000000750B0000-0x00000000750E0000-memory.dmp

memory/2204-0-0x0000000000190000-0x0000000000196000-memory.dmp

memory/2204-4-0x0000000000190000-0x0000000000196000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-04 01:32

Reported

2024-03-04 01:35

Platform

win10v2004-20240226-en

Max time kernel

93s

Max time network

113s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b0e4aeb6fe30a56452cc4bda87b5f3cf.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 4056 wrote to memory of 844 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4056 wrote to memory of 844 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4056 wrote to memory of 844 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\b0e4aeb6fe30a56452cc4bda87b5f3cf.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b0e4aeb6fe30a56452cc4bda87b5f3cf.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 844 -ip 844

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 844 -s 664

Network

Country Destination Domain Proto
US 8.8.8.8:53 74.32.126.40.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 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 20.231.121.79:80 tcp
US 8.8.8.8:53 86.23.85.13.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 8.8.8.8:53 180.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 0.204.248.87.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp

Files

memory/844-0-0x0000000075010000-0x0000000075040000-memory.dmp

memory/844-1-0x0000000000A50000-0x0000000000A56000-memory.dmp

memory/844-2-0x0000000075010000-0x0000000075040000-memory.dmp