Malware Analysis Report

2025-01-18 15:44

Sample ID 240815-2d9cbstalr
Target 327074efb47343ad7570ca2ac5a4ca50N.exe
SHA256 f7951e7902d40db690203a808c2f1da49a9e9b44dbf68d38f420b9781811dd4c
Tags
dridex 22202 botnet discovery loader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V15

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

f7951e7902d40db690203a808c2f1da49a9e9b44dbf68d38f420b9781811dd4c

Threat Level: Known bad

The file 327074efb47343ad7570ca2ac5a4ca50N.exe was found to be: Known bad.

Malicious Activity Summary

dridex 22202 botnet discovery loader

Dridex

Dridex Loader

Unsigned PE

Program crash

System Location Discovery: System Language Discovery

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-08-15 22:29

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-08-15 22:29

Reported

2024-08-15 22:31

Platform

win7-20240729-en

Max time kernel

110s

Max time network

16s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\327074efb47343ad7570ca2ac5a4ca50N.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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\327074efb47343ad7570ca2ac5a4ca50N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\327074efb47343ad7570ca2ac5a4ca50N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2540 -s 220

Network

N/A

Files

memory/2540-0-0x0000000000190000-0x0000000000196000-memory.dmp

memory/2540-1-0x0000000074B50000-0x0000000074B7F000-memory.dmp

memory/2540-3-0x0000000000190000-0x0000000000196000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-08-15 22:29

Reported

2024-08-15 22:31

Platform

win10v2004-20240802-en

Max time kernel

104s

Max time network

115s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\327074efb47343ad7570ca2ac5a4ca50N.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

System Location Discovery: System Language Discovery

discovery
Description Indicator Process Target
Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language C:\Windows\SysWOW64\rundll32.exe N/A

Suspicious use of WriteProcessMemory

Description Indicator Process Target
PID 4140 wrote to memory of 4464 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4140 wrote to memory of 4464 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4140 wrote to memory of 4464 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\327074efb47343ad7570ca2ac5a4ca50N.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\327074efb47343ad7570ca2ac5a4ca50N.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4464 -ip 4464

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4464 -s 616

Network

Country Destination Domain Proto
US 8.8.8.8:53 8.8.8.8.in-addr.arpa udp
US 8.8.8.8:53 209.205.72.20.in-addr.arpa udp
US 8.8.8.8:53 22.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 240.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 228.249.119.40.in-addr.arpa udp
US 8.8.8.8:53 18.31.95.13.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 39.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 23.58.20.217.in-addr.arpa udp
US 8.8.8.8:53 29.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp
US 150.171.28.10:443 tse1.mm.bing.net tcp

Files

memory/4464-0-0x0000000075380000-0x00000000753AF000-memory.dmp

memory/4464-2-0x0000000000D00000-0x0000000000D06000-memory.dmp