Malware Analysis Report

2025-01-18 15:59

Sample ID 240304-phm9fabb58
Target b21ab010650622a98ddb2884260f5d59
SHA256 57b447e662295400352d20ecf1a8e93345e4c38b28ecdd49b05c331a90e9462f
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

57b447e662295400352d20ecf1a8e93345e4c38b28ecdd49b05c331a90e9462f

Threat Level: Known bad

The file b21ab010650622a98ddb2884260f5d59 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

2024-03-04 12:19

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-04 12:19

Reported

2024-03-04 12:22

Platform

win7-20240221-en

Max time kernel

140s

Max time network

120s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b21ab010650622a98ddb2884260f5d59.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

Processes

C:\Windows\system32\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b21ab010650622a98ddb2884260f5d59.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b21ab010650622a98ddb2884260f5d59.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2760 -s 280

Network

N/A

Files

memory/2760-0-0x0000000075110000-0x0000000075140000-memory.dmp

memory/2760-1-0x0000000000140000-0x0000000000146000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-04 12:19

Reported

2024-03-04 12:22

Platform

win10v2004-20240226-en

Max time kernel

93s

Max time network

126s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b21ab010650622a98ddb2884260f5d59.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 WriteProcessMemory

Description Indicator Process Target
PID 1564 wrote to memory of 4376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1564 wrote to memory of 4376 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 1564 wrote to memory of 4376 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\b21ab010650622a98ddb2884260f5d59.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b21ab010650622a98ddb2884260f5d59.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4376 -ip 4376

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4376 -s 676

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 g.bing.com udp
US 204.79.197.200:443 g.bing.com tcp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 200.197.79.204.in-addr.arpa udp
US 8.8.8.8:53 41.110.16.96.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 217.135.221.88.in-addr.arpa udp
US 8.8.8.8:53 173.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 175.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 11.227.111.52.in-addr.arpa udp

Files

memory/4376-0-0x0000000001030000-0x0000000001036000-memory.dmp

memory/4376-1-0x0000000074F70000-0x0000000074FA0000-memory.dmp

memory/4376-3-0x0000000001030000-0x0000000001036000-memory.dmp