Malware Analysis Report

2025-01-18 15:59

Sample ID 240301-crbksaae4t
Target b013ab90ee5a6497548044065ce6357d
SHA256 bc3ae0b6d5f1eabe5e3a631830562af26ea4f60cb6f0d12fc8f2b50a33d709ac
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

bc3ae0b6d5f1eabe5e3a631830562af26ea4f60cb6f0d12fc8f2b50a33d709ac

Threat Level: Known bad

The file b013ab90ee5a6497548044065ce6357d 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

2024-03-01 02:18

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-01 02:18

Reported

2024-03-01 02:20

Platform

win7-20240221-en

Max time kernel

140s

Max time network

119s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b013ab90ee5a6497548044065ce6357d.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\b013ab90ee5a6497548044065ce6357d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b013ab90ee5a6497548044065ce6357d.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2288 -s 300

Network

N/A

Files

memory/2288-0-0x0000000074570000-0x00000000745A0000-memory.dmp

memory/2288-1-0x00000000001E0000-0x00000000001E6000-memory.dmp

memory/2288-2-0x0000000074570000-0x00000000745A0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-01 02:18

Reported

2024-03-01 02:20

Platform

win10v2004-20240226-en

Max time kernel

146s

Max time network

155s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b013ab90ee5a6497548044065ce6357d.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 2104 wrote to memory of 932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2104 wrote to memory of 932 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 2104 wrote to memory of 932 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\b013ab90ee5a6497548044065ce6357d.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b013ab90ee5a6497548044065ce6357d.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 932 -ip 932

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 932 -s 688

Network

Country Destination Domain Proto
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 209.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 103.169.127.40.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 233.143.123.92.in-addr.arpa udp
US 8.8.8.8:53 30.243.111.52.in-addr.arpa udp
US 8.8.8.8:53 0.205.248.87.in-addr.arpa udp
US 8.8.8.8:53 136.71.105.51.in-addr.arpa udp

Files

memory/932-0-0x0000000001500000-0x0000000001506000-memory.dmp

memory/932-1-0x0000000075270000-0x00000000752A0000-memory.dmp

memory/932-2-0x0000000075270000-0x00000000752A0000-memory.dmp