Malware Analysis Report

2025-01-18 16:00

Sample ID 240306-zrwmaahc73
Target b82c76461dbcaa6dfb6f81a48691cc73
SHA256 aaefe3009866dea2b8a3ddb029991cb65c0632a32a89009cdcf40019899f86b2
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

aaefe3009866dea2b8a3ddb029991cb65c0632a32a89009cdcf40019899f86b2

Threat Level: Known bad

The file b82c76461dbcaa6dfb6f81a48691cc73 was found to be: Known bad.

Malicious Activity Summary

dridex 22201 botnet loader

Dridex

Dridex Loader

Program crash

Unsigned PE

Suspicious use of WriteProcessMemory

MITRE ATT&CK

N/A

Analysis: static1

Detonation Overview

Reported

2024-03-06 20:57

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2024-03-06 20:57

Reported

2024-03-06 21:00

Platform

win7-20240221-en

Max time kernel

141s

Max time network

121s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b82c76461dbcaa6dfb6f81a48691cc73.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\b82c76461dbcaa6dfb6f81a48691cc73.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b82c76461dbcaa6dfb6f81a48691cc73.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3016 -s 308

Network

N/A

Files

memory/3016-0-0x0000000075190000-0x00000000751C0000-memory.dmp

memory/3016-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

memory/3016-2-0x0000000075190000-0x00000000751C0000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-03-06 20:57

Reported

2024-03-06 21:00

Platform

win10v2004-20240226-en

Max time kernel

147s

Max time network

142s

Command Line

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b82c76461dbcaa6dfb6f81a48691cc73.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 4040 wrote to memory of 4344 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4040 wrote to memory of 4344 N/A C:\Windows\system32\rundll32.exe C:\Windows\SysWOW64\rundll32.exe
PID 4040 wrote to memory of 4344 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\b82c76461dbcaa6dfb6f81a48691cc73.dll,#1

C:\Windows\SysWOW64\rundll32.exe

rundll32.exe C:\Users\Admin\AppData\Local\Temp\b82c76461dbcaa6dfb6f81a48691cc73.dll,#1

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4344 -ip 4344

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 4344 -s 692

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4072 --field-trial-handle=2260,i,3303482231723870786,2954015409682154873,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 23.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 200.178.17.96.in-addr.arpa udp
US 8.8.8.8:53 58.55.71.13.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.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 8.8.8.8:53 167.109.18.2.in-addr.arpa udp
US 8.8.8.8:53 45.19.74.20.in-addr.arpa udp
US 8.8.8.8:53 149.220.183.52.in-addr.arpa udp
US 8.8.8.8:53 26.165.165.52.in-addr.arpa udp
US 8.8.8.8:53 15.164.165.52.in-addr.arpa udp
GB 142.250.187.202:443 tcp
US 13.107.253.64:443 tcp
US 8.8.8.8:53 140.71.91.104.in-addr.arpa udp
US 52.111.229.43:443 tcp
US 8.8.8.8:53 19.229.111.52.in-addr.arpa udp
US 8.8.8.8:53 240.221.184.93.in-addr.arpa udp
US 8.8.8.8:53 43.58.199.20.in-addr.arpa udp
US 8.8.8.8:53 tse1.mm.bing.net udp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp
US 204.79.197.200:443 tse1.mm.bing.net tcp

Files

memory/4344-0-0x0000000074B90000-0x0000000074BC0000-memory.dmp

memory/4344-1-0x00000000017C0000-0x00000000017C6000-memory.dmp