Malware Analysis Report

2025-08-05 16:35

Sample ID 210615-t1df19j8ex
Target fd638cb9242c28e98e3e216af91f45a3f5d91fc93996e3c09c2b056f8e312dff
SHA256 fd638cb9242c28e98e3e216af91f45a3f5d91fc93996e3c09c2b056f8e312dff
Tags
dridex 40112 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 Overview

score
10/10

SHA256

fd638cb9242c28e98e3e216af91f45a3f5d91fc93996e3c09c2b056f8e312dff

Threat Level: Known bad

The file fd638cb9242c28e98e3e216af91f45a3f5d91fc93996e3c09c2b056f8e312dff was found to be: Known bad.

Malicious Activity Summary

dridex 40112 botnet loader

Dridex

Dridex Loader

Program crash

Suspicious behavior: EnumeratesProcesses

Suspicious use of AdjustPrivilegeToken

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2021-06-15 15:45

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-06-15 15:45

Reported

2021-06-15 15:48

Platform

win10v20210410

Max time kernel

18s

Max time network

135s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\fd638cb9242c28e98e3e216af91f45a3f5d91fc93996e3c09c2b056f8e312dff.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 AdjustPrivilegeToken

Description Indicator Process Target
Token: SeRestorePrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A
Token: SeBackupPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A
Token: SeDebugPrivilege N/A C:\Windows\SysWOW64\WerFault.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 1856 wrote to memory of 2236 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1856 wrote to memory of 2236 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1856 wrote to memory of 2236 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\fd638cb9242c28e98e3e216af91f45a3f5d91fc93996e3c09c2b056f8e312dff.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\fd638cb9242c28e98e3e216af91f45a3f5d91fc93996e3c09c2b056f8e312dff.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2236 -s 676

Network

N/A

Files

memory/2236-114-0x0000000000000000-mapping.dmp

memory/2236-115-0x0000000074420000-0x0000000074450000-memory.dmp

memory/2236-117-0x00000000035A0000-0x00000000035A6000-memory.dmp