Malware Analysis Report

2025-08-05 14:07

Sample ID 230807-1ercgahe42
Target rStorhertugs.exe
SHA256 e49fd2a82352a63a184372f5a71abf67cb1f9b709d4cf61d4de50194bdac57c3
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

e49fd2a82352a63a184372f5a71abf67cb1f9b709d4cf61d4de50194bdac57c3

Threat Level: Known bad

The file rStorhertugs.exe was found to be: Known bad.

Malicious Activity Summary

guloader downloader

Guloader,Cloudeye

Loads dropped DLL

Enumerates physical storage devices

Program crash

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-08-07 21:34

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-07 21:34

Reported

2023-08-07 21:36

Platform

win7-20230712-en

Max time kernel

117s

Max time network

119s

Command Line

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

Signatures

Loads dropped DLL

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

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\rStorhertugs.exe

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 3016 -s 428

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nst8EE9.tmp\System.dll

MD5 7399323923e3946fe9140132ac388132
SHA1 728257d06c452449b1241769b459f091aabcffc5
SHA256 5a1c20a3e2e2eb182976977669f2c5d9f3104477e98f74d69d2434e79b92fdc3
SHA512 d6f28ba761351f374ae007c780be27758aea7b9f998e2a88a542eede459d18700adffe71abcb52b8a8c00695efb7ccc280175b5eeb57ca9a645542edfabb64f1

memory/3016-64-0x0000000002F70000-0x0000000004859000-memory.dmp

memory/3016-65-0x0000000002F70000-0x0000000004859000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-07 21:34

Reported

2023-08-07 21:36

Platform

win10v2004-20230703-en

Max time kernel

143s

Max time network

153s

Command Line

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

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

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

Enumerates physical storage devices

Program crash

Description Indicator Process Target
N/A N/A C:\Windows\SysWOW64\WerFault.exe C:\Users\Admin\AppData\Local\Temp\rStorhertugs.exe

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2576 -ip 2576

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2576 -s 836

Network

Country Destination Domain Proto
US 8.8.8.8:53 59.128.231.4.in-addr.arpa udp
US 8.8.8.8:53 4.159.190.20.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 183.59.114.20.in-addr.arpa udp
US 8.8.8.8:53 206.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 86.8.109.52.in-addr.arpa udp
US 8.8.8.8:53 126.179.238.8.in-addr.arpa udp
US 8.8.8.8:53 1.173.189.20.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsy9B48.tmp\System.dll

MD5 7399323923e3946fe9140132ac388132
SHA1 728257d06c452449b1241769b459f091aabcffc5
SHA256 5a1c20a3e2e2eb182976977669f2c5d9f3104477e98f74d69d2434e79b92fdc3
SHA512 d6f28ba761351f374ae007c780be27758aea7b9f998e2a88a542eede459d18700adffe71abcb52b8a8c00695efb7ccc280175b5eeb57ca9a645542edfabb64f1

memory/2576-144-0x0000000003130000-0x0000000004A19000-memory.dmp

memory/2576-145-0x0000000003130000-0x0000000004A19000-memory.dmp

memory/2576-146-0x0000000003130000-0x0000000004A19000-memory.dmp