Malware Analysis Report

2025-01-18 15:59

Sample ID 240304-tyrzsaef5w
Target b296312eb096bbd571f4064c13c96335
SHA256 a88918c5ec33af85095aa366cc9b0d0d77950cd13db6e9d3e140414992a3dfef
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

a88918c5ec33af85095aa366cc9b0d0d77950cd13db6e9d3e140414992a3dfef

Threat Level: Known bad

The file b296312eb096bbd571f4064c13c96335 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 16:28

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-04 16:28

Reported

2024-03-04 16:30

Platform

win7-20240221-en

Max time kernel

118s

Max time network

123s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b296312eb096bbd571f4064c13c96335.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

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 2888 wrote to memory of 2904 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2888 wrote to memory of 2904 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2888 wrote to memory of 2904 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2888 wrote to memory of 2904 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2888 wrote to memory of 2904 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2888 wrote to memory of 2904 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2888 wrote to memory of 2904 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\b296312eb096bbd571f4064c13c96335.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b296312eb096bbd571f4064c13c96335.dll,#1

Network

N/A

Files

memory/2904-0-0x0000000074930000-0x0000000074960000-memory.dmp

memory/2904-1-0x0000000000250000-0x0000000000256000-memory.dmp

memory/2904-2-0x0000000074930000-0x0000000074960000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-04 16:28

Reported

2024-03-04 16:30

Platform

win10v2004-20240226-en

Max time kernel

139s

Max time network

113s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b296312eb096bbd571f4064c13c96335.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 4736 wrote to memory of 3076 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4736 wrote to memory of 3076 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4736 wrote to memory of 3076 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\b296312eb096bbd571f4064c13c96335.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b296312eb096bbd571f4064c13c96335.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 472 -p 3076 -ip 3076

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3076 -s 688

Network

Country Destination Domain Proto
US 8.8.8.8:53 14.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 187.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 55.36.223.20.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

Files

memory/3076-0-0x0000000075420000-0x0000000075450000-memory.dmp

memory/3076-1-0x0000000001150000-0x0000000001156000-memory.dmp