Malware Analysis Report

2025-01-02 07:34

Sample ID 240510-plhs5ahe49
Target be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e
SHA256 be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e
Tags
privateloader bootkit loader persistence
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

be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e

Threat Level: Known bad

The file be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e was found to be: Known bad.

Malicious Activity Summary

privateloader bootkit loader persistence

PrivateLoader

Enumerates connected drives

Writes to the Master Boot Record (MBR)

Suspicious use of NtSetInformationThreadHideFromDebugger

Suspicious behavior: EnumeratesProcesses

Suspicious behavior: GetForegroundWindowSpam

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2024-05-10 12:24

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-05-10 12:24

Reported

2024-05-10 12:27

Platform

win7-20231129-en

Max time kernel

121s

Max time network

124s

Command Line

"C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe"

Signatures

PrivateLoader

loader privateloader

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe N/A

Suspicious behavior: EnumeratesProcesses

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe N/A

Suspicious behavior: GetForegroundWindowSpam

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe

"C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 www.diskgenius.cn udp
US 8.8.8.8:53 www.diskgenius.cn udp
US 8.8.8.8:53 www.diskgenius.cn udp
CN 180.101.203.206:443 www.diskgenius.cn tcp
CN 58.218.215.168:443 www.diskgenius.cn tcp
CN 61.160.192.99:443 www.diskgenius.cn tcp
CN 180.101.203.206:443 www.diskgenius.cn tcp
CN 180.101.203.206:443 www.diskgenius.cn tcp
CN 180.101.203.206:443 www.diskgenius.cn tcp

Files

memory/2032-5-0x0000000077070000-0x0000000077072000-memory.dmp

memory/2032-3-0x0000000077070000-0x0000000077072000-memory.dmp

memory/2032-1-0x0000000077070000-0x0000000077072000-memory.dmp

memory/2032-0-0x00000001409E3000-0x0000000140AAF000-memory.dmp

memory/2032-6-0x0000000140000000-0x00000001423FE000-memory.dmp

memory/2032-10-0x00000001409E3000-0x0000000140AAF000-memory.dmp

memory/2032-11-0x0000000140000000-0x00000001423FE000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2024-05-10 12:24

Reported

2024-05-10 12:27

Platform

win10v2004-20240226-en

Max time kernel

151s

Max time network

165s

Command Line

"C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe"

Signatures

PrivateLoader

loader privateloader

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe N/A

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe

"C:\Users\Admin\AppData\Local\Temp\be4fd58d0f1f2c09fcae3dbd62455e9cf0f64ecd1a9b146d8cdf62fc599e2d8e.exe"

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=4068 --field-trial-handle=3088,i,14310325015283915034,7660943942870463106,262144 --variations-seed-version /prefetch:8

Network

Country Destination Domain Proto
US 8.8.8.8:53 133.211.185.52.in-addr.arpa udp
US 13.107.253.67:443 tcp
US 8.8.8.8:53 www.diskgenius.cn udp
CN 61.160.192.99:443 www.diskgenius.cn tcp
CN 61.160.192.99:443 www.diskgenius.cn tcp
CN 61.160.192.99:443 www.diskgenius.cn tcp
US 8.8.8.8:53 20.160.190.20.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 50.23.12.20.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 172.210.232.199.in-addr.arpa udp
US 8.8.8.8:53 196.249.167.52.in-addr.arpa udp
US 8.8.8.8:53 www.diskgenius.cn udp
CN 58.218.215.168:443 www.diskgenius.cn tcp
CN 58.218.215.168:443 www.diskgenius.cn tcp
CN 58.218.215.168:443 www.diskgenius.cn tcp
US 8.8.8.8:53 28.118.140.52.in-addr.arpa udp
US 8.8.8.8:53 209.143.182.52.in-addr.arpa udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
US 8.8.8.8:53 chromewebstore.googleapis.com udp
GB 142.250.187.202:443 chromewebstore.googleapis.com tcp
US 8.8.8.8:53 202.187.250.142.in-addr.arpa udp

Files

memory/2548-0-0x00000001409E3000-0x0000000140AAF000-memory.dmp

memory/2548-1-0x00007FFFF6EB0000-0x00007FFFF6EB2000-memory.dmp

memory/2548-3-0x0000000140000000-0x00000001423FE000-memory.dmp

memory/2548-6-0x00000001409E3000-0x0000000140AAF000-memory.dmp

memory/2548-7-0x0000000140000000-0x00000001423FE000-memory.dmp