Malware Analysis Report

2025-08-05 14:06

Sample ID 230807-jca42afd6z
Target 528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414
SHA256 528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414
Tags
guloader downloader
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

528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414

Threat Level: Known bad

The file 528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414 was found to be: Known bad.

Malicious Activity Summary

guloader downloader

Guloader,Cloudeye

Enumerates connected drives

Unsigned PE

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-08-07 07:30

Signatures

Unsigned PE

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-07 07:30

Reported

2023-08-07 07:33

Platform

win7-20230712-en

Max time kernel

122s

Max time network

125s

Command Line

"C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe

"C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe"

Network

N/A

Files

memory/2440-55-0x0000000002160000-0x0000000002170000-memory.dmp

memory/2440-56-0x0000000002160000-0x0000000002170000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-07 07:30

Reported

2023-08-07 07:33

Platform

win10v2004-20230703-en

Max time kernel

143s

Max time network

148s

Command Line

"C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe"

Signatures

Enumerates connected drives

Description Indicator Process Target
File opened (read-only) \??\F: C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe N/A

Enumerates physical storage devices

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe

"C:\Users\Admin\AppData\Local\Temp\528e53b68920985b36eaf1c26487be101bc894aa000a46cc4f18f0d95951e414.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 157.123.68.40.in-addr.arpa udp
US 8.8.8.8:53 126.177.238.8.in-addr.arpa udp
US 8.8.8.8:53 63.13.109.52.in-addr.arpa udp
US 8.8.8.8:53 84.65.42.20.in-addr.arpa udp

Files

memory/3348-135-0x0000000003690000-0x00000000036A0000-memory.dmp

memory/3348-136-0x0000000003690000-0x00000000036A0000-memory.dmp