Malware Analysis Report

2025-08-10 22:18

Sample ID 210615-fdn4bf4w4e
Target b660fcfe99a2e096d8c8745a9135939432c994a9fe3d0f0fb8bfb127a07051bf
SHA256 b660fcfe99a2e096d8c8745a9135939432c994a9fe3d0f0fb8bfb127a07051bf
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

b660fcfe99a2e096d8c8745a9135939432c994a9fe3d0f0fb8bfb127a07051bf

Threat Level: Known bad

The file b660fcfe99a2e096d8c8745a9135939432c994a9fe3d0f0fb8bfb127a07051bf 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 11:30

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2021-06-15 11:30

Reported

2021-06-15 11:33

Platform

win10v20210410

Max time kernel

17s

Max time network

139s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b660fcfe99a2e096d8c8745a9135939432c994a9fe3d0f0fb8bfb127a07051bf.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 3872 wrote to memory of 3128 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3872 wrote to memory of 3128 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 3872 wrote to memory of 3128 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\b660fcfe99a2e096d8c8745a9135939432c994a9fe3d0f0fb8bfb127a07051bf.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b660fcfe99a2e096d8c8745a9135939432c994a9fe3d0f0fb8bfb127a07051bf.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3128 -s 680

Network

N/A

Files

memory/3128-114-0x0000000000000000-mapping.dmp

memory/3128-115-0x0000000074300000-0x0000000074330000-memory.dmp

memory/3128-117-0x0000000002FF0000-0x0000000002FF6000-memory.dmp