Malware Analysis Report

2025-01-18 15:56

Sample ID 240305-j69jpaad5x
Target b43c74912d50d1abb7b58f81a60308ab
SHA256 ec737cbb4f16d2339ae6b377989a30376c36a4c9cfaedcf7539fa104bb5ccbf6
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

ec737cbb4f16d2339ae6b377989a30376c36a4c9cfaedcf7539fa104bb5ccbf6

Threat Level: Known bad

The file b43c74912d50d1abb7b58f81a60308ab 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 08:18

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-05 08:18

Reported

2024-03-05 08:20

Platform

win7-20240221-en

Max time kernel

141s

Max time network

118s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b43c74912d50d1abb7b58f81a60308ab.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\b43c74912d50d1abb7b58f81a60308ab.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b43c74912d50d1abb7b58f81a60308ab.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 1988 -s 300

Network

N/A

Files

memory/1988-0-0x0000000075030000-0x0000000075060000-memory.dmp

memory/1988-1-0x00000000006B0000-0x00000000006B6000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-05 08:18

Reported

2024-03-05 08:20

Platform

win10v2004-20240226-en

Max time kernel

149s

Max time network

155s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b43c74912d50d1abb7b58f81a60308ab.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 3224 wrote to memory of 3096 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3224 wrote to memory of 3096 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3224 wrote to memory of 3096 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\b43c74912d50d1abb7b58f81a60308ab.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b43c74912d50d1abb7b58f81a60308ab.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 3096 -ip 3096

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3096 -s 688

Network

Country Destination Domain Proto
US 8.8.8.8:53 202.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 134.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 217.106.137.52.in-addr.arpa udp
US 8.8.8.8:53 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 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 18.134.221.88.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.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 8.8.8.8:53 187.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 22.236.111.52.in-addr.arpa udp
US 8.8.8.8:53 171.117.168.52.in-addr.arpa udp

Files

memory/3096-0-0x00000000758F0000-0x0000000075920000-memory.dmp

memory/3096-1-0x0000000000750000-0x0000000000756000-memory.dmp