Malware Analysis Report

2025-01-18 15:57

Sample ID 240305-wrky1adc4v
Target b5556f4f1aa69065b0c9b0b7df386245
SHA256 8c483c7b085217740a966804a00cee63018c4aa7b1f5f82078b3392b0bbdfc65
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

8c483c7b085217740a966804a00cee63018c4aa7b1f5f82078b3392b0bbdfc65

Threat Level: Known bad

The file b5556f4f1aa69065b0c9b0b7df386245 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 18:09

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-05 18:09

Reported

2024-03-05 18:11

Platform

win7-20240221-en

Max time kernel

140s

Max time network

124s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b5556f4f1aa69065b0c9b0b7df386245.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\b5556f4f1aa69065b0c9b0b7df386245.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b5556f4f1aa69065b0c9b0b7df386245.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2312 -s 308

Network

N/A

Files

memory/2312-0-0x00000000749B0000-0x00000000749E0000-memory.dmp

memory/2312-1-0x00000000000E0000-0x00000000000E6000-memory.dmp

memory/2312-2-0x00000000749B0000-0x00000000749E0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-05 18:09

Reported

2024-03-05 18:11

Platform

win10v2004-20240226-en

Max time kernel

146s

Max time network

155s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b5556f4f1aa69065b0c9b0b7df386245.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 3304 wrote to memory of 2764 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3304 wrote to memory of 2764 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3304 wrote to memory of 2764 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\b5556f4f1aa69065b0c9b0b7df386245.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b5556f4f1aa69065b0c9b0b7df386245.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 464 -p 2764 -ip 2764

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2764 -s 688

Network

Country Destination Domain Proto
US 8.8.8.8:53 83.177.190.20.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 208.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 57.169.31.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 154.239.44.20.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 232.135.221.88.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
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 210.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 137.71.105.51.in-addr.arpa udp

Files

memory/2764-0-0x00000000006F0000-0x00000000006F6000-memory.dmp

memory/2764-1-0x00000000749A0000-0x00000000749D0000-memory.dmp

memory/2764-2-0x00000000749A0000-0x00000000749D0000-memory.dmp