Malware Analysis Report

2025-01-18 15:59

Sample ID 240304-xnztesbc97
Target b2dedba29f062f380a0d7b10fa5844bf
SHA256 4f6a46fa934e1ac4be9eaeb67b3d2ac5964d25d4d04893e936d6f6e1f5d3a8c9
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

4f6a46fa934e1ac4be9eaeb67b3d2ac5964d25d4d04893e936d6f6e1f5d3a8c9

Threat Level: Known bad

The file b2dedba29f062f380a0d7b10fa5844bf 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

2024-03-04 19:00

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-04 19:00

Reported

2024-03-04 19:03

Platform

win7-20240221-en

Max time kernel

141s

Max time network

124s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b2dedba29f062f380a0d7b10fa5844bf.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\b2dedba29f062f380a0d7b10fa5844bf.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b2dedba29f062f380a0d7b10fa5844bf.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2612 -s 308

Network

N/A

Files

memory/2612-1-0x00000000001C0000-0x00000000001C6000-memory.dmp

memory/2612-0-0x0000000074BE0000-0x0000000074C10000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-04 19:00

Reported

2024-03-04 19:03

Platform

win10v2004-20240226-en

Max time kernel

139s

Max time network

119s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b2dedba29f062f380a0d7b10fa5844bf.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 3888 wrote to memory of 2292 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3888 wrote to memory of 2292 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3888 wrote to memory of 2292 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\b2dedba29f062f380a0d7b10fa5844bf.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b2dedba29f062f380a0d7b10fa5844bf.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 2292 -ip 2292

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2292 -s 692

Network

Country Destination Domain Proto
US 8.8.8.8:53 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 133.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 210.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 138.91.171.81:80 tcp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 81.171.91.138.in-addr.arpa udp
US 8.8.8.8:53 205.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.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 79.121.231.20.in-addr.arpa udp

Files

memory/2292-0-0x0000000074DA0000-0x0000000074DD0000-memory.dmp

memory/2292-1-0x0000000000FB0000-0x0000000000FB6000-memory.dmp