Malware Analysis Report

2025-01-18 16:01

Sample ID 240307-wwrbksba7z
Target b95a6d602faa9964c98b29d7057eb7c4
SHA256 0e35e83f3db37bad6b3584416fb090ccc51a91ce021927b3512543d200672e81
Tags
dridex 22201 botnet loader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
10/10

SHA256

0e35e83f3db37bad6b3584416fb090ccc51a91ce021927b3512543d200672e81

Threat Level: Known bad

The file b95a6d602faa9964c98b29d7057eb7c4 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

2024-03-07 18:16

Signatures

Unsigned PE

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

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-07 18:16

Reported

2024-03-07 18:21

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

157s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b95a6d602faa9964c98b29d7057eb7c4.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 4492 wrote to memory of 1824 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4492 wrote to memory of 1824 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4492 wrote to memory of 1824 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\b95a6d602faa9964c98b29d7057eb7c4.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b95a6d602faa9964c98b29d7057eb7c4.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 1824 -ip 1824

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1824 -s 668

Network

Country Destination Domain Proto
US 8.8.8.8:53 140.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 97.17.167.52.in-addr.arpa udp
US 8.8.8.8:53 195.233.44.23.in-addr.arpa udp
US 8.8.8.8:53 183.142.211.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 171.39.242.20.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 13.86.106.20.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 8.8.8.8:53 65.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 68.179.17.96.in-addr.arpa udp
US 8.8.8.8:53 48.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 13.173.189.20.in-addr.arpa udp

Files

memory/1824-0-0x00000000003F0000-0x00000000003F6000-memory.dmp

memory/1824-1-0x0000000075540000-0x0000000075570000-memory.dmp

memory/1824-5-0x00000000003F0000-0x00000000003F6000-memory.dmp

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-07 18:16

Reported

2024-03-07 18:19

Platform

win7-20240221-en

Max time kernel

141s

Max time network

124s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b95a6d602faa9964c98b29d7057eb7c4.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\b95a6d602faa9964c98b29d7057eb7c4.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b95a6d602faa9964c98b29d7057eb7c4.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2020 -s 280

Network

N/A

Files

memory/2020-0-0x0000000075140000-0x0000000075170000-memory.dmp

memory/2020-2-0x00000000001D0000-0x00000000001D6000-memory.dmp