Malware Analysis Report

2025-01-18 15:59

Sample ID 240304-j4zxgadf4t
Target b1a3013cfc5071536af5b10a92d05e8e
SHA256 ed2e3b863441c1df52fbd8221c443b28a513073572efccd1acaeaed56cac62c2
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

ed2e3b863441c1df52fbd8221c443b28a513073572efccd1acaeaed56cac62c2

Threat Level: Known bad

The file b1a3013cfc5071536af5b10a92d05e8e 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 08:14

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-04 08:14

Reported

2024-03-04 08:16

Platform

win7-20240215-en

Max time kernel

141s

Max time network

122s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1a3013cfc5071536af5b10a92d05e8e.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\b1a3013cfc5071536af5b10a92d05e8e.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1a3013cfc5071536af5b10a92d05e8e.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2192 -s 300

Network

N/A

Files

memory/2192-0-0x0000000074ED0000-0x0000000074F00000-memory.dmp

memory/2192-1-0x0000000000220000-0x0000000000226000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-04 08:14

Reported

2024-03-04 08:16

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

151s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1a3013cfc5071536af5b10a92d05e8e.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 1520 wrote to memory of 3444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1520 wrote to memory of 3444 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1520 wrote to memory of 3444 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\b1a3013cfc5071536af5b10a92d05e8e.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b1a3013cfc5071536af5b10a92d05e8e.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 3444 -ip 3444

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3444 -s 664

Network

Country Destination Domain Proto
US 8.8.8.8:53 74.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.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 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 58.99.105.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 79.121.231.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 175.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 udp

Files

memory/3444-0-0x0000000074970000-0x00000000749A0000-memory.dmp

memory/3444-1-0x0000000000BF0000-0x0000000000BF6000-memory.dmp

memory/3444-2-0x0000000074970000-0x00000000749A0000-memory.dmp