Malware Analysis Report

2025-01-18 15:58

Sample ID 240301-bhytaahf36
Target aff178ec6f6a0acec1ffc0e90649e5eb
SHA256 fbc91648d1624752f379cba89c1a99e7377391ef8e6e1eafa41d81f3aaa8bd9a
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

fbc91648d1624752f379cba89c1a99e7377391ef8e6e1eafa41d81f3aaa8bd9a

Threat Level: Known bad

The file aff178ec6f6a0acec1ffc0e90649e5eb 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

2024-03-01 01:09

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-01 01:09

Reported

2024-03-01 01:11

Platform

win7-20240220-en

Max time kernel

140s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\aff178ec6f6a0acec1ffc0e90649e5eb.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\aff178ec6f6a0acec1ffc0e90649e5eb.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\aff178ec6f6a0acec1ffc0e90649e5eb.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1292 -s 300

Network

N/A

Files

memory/1292-0-0x0000000074F50000-0x0000000074F80000-memory.dmp

memory/1292-1-0x0000000000120000-0x0000000000126000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-01 01:09

Reported

2024-03-01 01:11

Platform

win10v2004-20240226-en

Max time kernel

91s

Max time network

113s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\aff178ec6f6a0acec1ffc0e90649e5eb.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 2120 wrote to memory of 4076 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2120 wrote to memory of 4076 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2120 wrote to memory of 4076 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\aff178ec6f6a0acec1ffc0e90649e5eb.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\aff178ec6f6a0acec1ffc0e90649e5eb.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 4076 -ip 4076

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4076 -s 664

Network

Country Destination Domain Proto
US 8.8.8.8:53 67.31.126.40.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 8.8.8.8:53 194.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.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
NL 52.142.223.178:80 tcp

Files

memory/4076-0-0x00000000752A0000-0x00000000752D0000-memory.dmp

memory/4076-1-0x0000000000960000-0x0000000000966000-memory.dmp

memory/4076-2-0x00000000752A0000-0x00000000752D0000-memory.dmp