Malware Analysis Report

2025-08-05 14:07

Sample ID 230807-hrfgmafc6z
Target PT Inquiry - Quote 09052022-008.rar
SHA256 470057993cd8fa120b081ccb8d1b53dc7492208c9111f1e84c58c3d69ba6e9a5
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

470057993cd8fa120b081ccb8d1b53dc7492208c9111f1e84c58c3d69ba6e9a5

Threat Level: Known bad

The file PT Inquiry - Quote 09052022-008.rar was found to be: Known bad.

Malicious Activity Summary

guloader downloader

Guloader,Cloudeye

Loads dropped DLL

Program crash

Enumerates physical storage devices

NSIS installer

Suspicious use of WriteProcessMemory

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-08-07 06:57

Signatures

NSIS installer

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

Analysis: behavioral1

Detonation Overview

Submitted

2023-08-07 06:57

Reported

2023-08-07 07:00

Platform

win7-20230712-en

Max time kernel

122s

Max time network

124s

Command Line

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

Signatures

Loads dropped DLL

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

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 2564 -s 1832

Network

N/A

Files

\Users\Admin\AppData\Local\Temp\nsd7763.tmp\System.dll

MD5 4d3b19a81bd51f8ce44b93643a4e3a99
SHA1 35f8b00e85577b014080df98bd2c378351d9b3e9
SHA256 fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce
SHA512 b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

memory/2564-67-0x00000000039C0000-0x0000000005003000-memory.dmp

memory/2564-68-0x00000000039C0000-0x0000000005003000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-08-07 06:57

Reported

2023-08-07 07:00

Platform

win10v2004-20230703-en

Max time kernel

91s

Max time network

116s

Command Line

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

Signatures

Guloader,Cloudeye

downloader guloader

Loads dropped DLL

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

Processes

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

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

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 5084 -ip 5084

C:\Windows\SysWOW64\WerFault.exe

C:\Windows\SysWOW64\WerFault.exe -u -p 5084 -s 2480

Network

Country Destination Domain Proto
US 8.8.8.8:53 146.78.124.51.in-addr.arpa udp
US 8.8.8.8:53 126.177.238.8.in-addr.arpa udp
US 8.8.8.8:53 67.31.126.40.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.187.3.20.in-addr.arpa udp
US 8.8.8.8:53 1.77.109.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsm8C34.tmp\System.dll

MD5 4d3b19a81bd51f8ce44b93643a4e3a99
SHA1 35f8b00e85577b014080df98bd2c378351d9b3e9
SHA256 fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce
SHA512 b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

memory/5084-145-0x0000000005070000-0x00000000066B3000-memory.dmp

memory/5084-146-0x0000000005070000-0x00000000066B3000-memory.dmp

memory/5084-147-0x0000000005070000-0x00000000066B3000-memory.dmp