Malware Analysis Report

2025-01-18 15:56

Sample ID 240305-rybaxsaa77
Target b4f02c7fbc16d032f4f49aeb716dc571
SHA256 fac785f63e65f9529848de6692a93c4f0b49673c4dab1956c76288a3848c327c
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

fac785f63e65f9529848de6692a93c4f0b49673c4dab1956c76288a3848c327c

Threat Level: Known bad

The file b4f02c7fbc16d032f4f49aeb716dc571 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

2024-03-05 14:35

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-05 14:35

Reported

2024-03-05 14:38

Platform

win7-20240221-en

Max time kernel

141s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b4f02c7fbc16d032f4f49aeb716dc571.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

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b4f02c7fbc16d032f4f49aeb716dc571.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b4f02c7fbc16d032f4f49aeb716dc571.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1948 -s 300

Network

N/A

Files

memory/1948-0-0x0000000075300000-0x0000000075330000-memory.dmp

memory/1948-1-0x0000000000180000-0x0000000000186000-memory.dmp

memory/1948-2-0x0000000075300000-0x0000000075330000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-05 14:35

Reported

2024-03-05 14:38

Platform

win10v2004-20240226-en

Max time kernel

150s

Max time network

153s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b4f02c7fbc16d032f4f49aeb716dc571.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 3308 wrote to memory of 1204 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3308 wrote to memory of 1204 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3308 wrote to memory of 1204 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\b4f02c7fbc16d032f4f49aeb716dc571.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b4f02c7fbc16d032f4f49aeb716dc571.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 1204 -ip 1204

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1204 -s 688

Network

Country Destination Domain Proto
US 8.8.8.8:53 232.168.11.51.in-addr.arpa udp
US 8.8.8.8:53 187.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 2.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 88.156.103.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 104.241.123.92.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 179.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 64.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.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 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 181.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
GB 96.17.178.181:80 tcp

Files

memory/1204-0-0x0000000000ED0000-0x0000000000ED6000-memory.dmp

memory/1204-1-0x0000000074FB0000-0x0000000074FE0000-memory.dmp

memory/1204-2-0x0000000074FB0000-0x0000000074FE0000-memory.dmp

memory/1204-3-0x0000000000ED0000-0x0000000000ED6000-memory.dmp