Malware Analysis Report

2025-08-10 19:27

Sample ID 230714-swljjsfg6y
Target Factura 1-000816pdf.bin.zip
SHA256 7fb0f9a2a6f1d9b75dac31e00e70c38a0bc26d2451561a0b37444244e1ddd62d
Tags
guloader discovery downloader
score
10/10

Table of Contents

Analysis Overview

MITRE ATT&CK

Enterprise Matrix V6

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

7fb0f9a2a6f1d9b75dac31e00e70c38a0bc26d2451561a0b37444244e1ddd62d

Threat Level: Known bad

The file Factura 1-000816pdf.bin.zip was found to be: Known bad.

Malicious Activity Summary

guloader discovery downloader

Guloader,Cloudeye

Loads dropped DLL

Checks QEMU agent file

Legitimate hosting services abused for malware hosting/C2

Checks installed software on the system

Suspicious use of SetThreadContext

Drops file in System32 directory

Suspicious use of NtSetInformationThreadHideFromDebugger

Drops file in Windows directory

Enumerates physical storage devices

Unsigned PE

NSIS installer

Suspicious use of WriteProcessMemory

Suspicious behavior: MapViewOfSection

MITRE ATT&CK

Analysis: static1

Detonation Overview

Reported

2023-07-14 15:28

Signatures

Unsigned PE

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

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

2023-07-14 15:28

Reported

2023-07-14 15:31

Platform

win7-20230712-en

Max time kernel

150s

Max time network

151s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Checks QEMU agent file

Description Indicator Process Target
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Checks installed software on the system

discovery

Legitimate hosting services abused for malware hosting/C2

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Interlocating\Supereligibleness.Var C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 2584 set thread context of 2860 N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\Dicarpellary.ini C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe

"C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe"

C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe

"C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 drive.google.com udp
NL 172.217.168.238:443 drive.google.com tcp

Files

\Users\Admin\AppData\Local\Temp\nsy8AC3.tmp\System.dll

MD5 6ad39193ed20078aa1b23c33a1e48859
SHA1 95e70e4f47aa1689cc08afbdaef3ec323b5342fa
SHA256 b9631423a50c666faf2cc6901c5a8d6eb2fecd306fdd2524256b7e2e37b251c2
SHA512 78c89bb8c86f3b68e5314467eca4e8e922d143335081fa66b01d756303e1aec68ed01f4be7098dbe06a789ca32a0f31102f5ba408bc5ab28e61251611bb4f62b

memory/2584-62-0x0000000002D50000-0x0000000006049000-memory.dmp

memory/2584-63-0x0000000002D50000-0x0000000006049000-memory.dmp

memory/2584-64-0x0000000077440000-0x00000000775E9000-memory.dmp

memory/2584-65-0x0000000077630000-0x0000000077706000-memory.dmp

memory/2584-66-0x0000000010000000-0x0000000010006000-memory.dmp

memory/2860-67-0x0000000000400000-0x0000000001462000-memory.dmp

memory/2860-68-0x0000000001470000-0x0000000004769000-memory.dmp

memory/2860-69-0x0000000077440000-0x00000000775E9000-memory.dmp

memory/2860-70-0x0000000001470000-0x0000000004769000-memory.dmp

memory/2860-71-0x0000000000400000-0x0000000001462000-memory.dmp

Analysis: behavioral2

Detonation Overview

Submitted

2023-07-14 15:28

Reported

2023-07-14 15:31

Platform

win10v2004-20230703-en

Max time kernel

148s

Max time network

155s

Command Line

"C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe"

Signatures

Guloader,Cloudeye

downloader guloader

Checks QEMU agent file

Description Indicator Process Target
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A
File opened (read-only) C:\Program Files\Qemu-ga\qemu-ga.exe C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Loads dropped DLL

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Checks installed software on the system

discovery

Legitimate hosting services abused for malware hosting/C2

Drops file in System32 directory

Description Indicator Process Target
File opened for modification C:\Windows\SysWOW64\Interlocating\Supereligibleness.Var C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Suspicious use of NtSetInformationThreadHideFromDebugger

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A
N/A N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Suspicious use of SetThreadContext

Description Indicator Process Target
PID 1608 set thread context of 3636 N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe

Drops file in Windows directory

Description Indicator Process Target
File opened for modification C:\Windows\resources\Dicarpellary.ini C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Enumerates physical storage devices

Suspicious behavior: MapViewOfSection

Description Indicator Process Target
N/A N/A C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe

"C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe"

C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe

"C:\Users\Admin\AppData\Local\Temp\Factura 1-000816pdf.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 2.136.104.51.in-addr.arpa udp
US 8.8.8.8:53 95.221.229.192.in-addr.arpa udp
US 8.8.8.8:53 68.32.126.40.in-addr.arpa udp
US 8.8.8.8:53 241.154.82.20.in-addr.arpa udp
US 8.8.8.8:53 26.35.223.20.in-addr.arpa udp
US 8.8.8.8:53 86.23.85.13.in-addr.arpa udp
US 8.8.8.8:53 198.209.218.23.in-addr.arpa udp
US 8.8.8.8:53 9.228.82.20.in-addr.arpa udp
US 8.8.8.8:53 158.240.127.40.in-addr.arpa udp
US 8.8.8.8:53 56.126.166.20.in-addr.arpa udp
US 8.8.8.8:53 135.1.85.104.in-addr.arpa udp
US 8.8.8.8:53 119.110.54.20.in-addr.arpa udp
US 8.8.8.8:53 208.194.73.20.in-addr.arpa udp
US 8.8.8.8:53 240.81.21.72.in-addr.arpa udp
US 8.8.8.8:53 1.208.79.178.in-addr.arpa udp
US 8.8.8.8:53 126.139.241.8.in-addr.arpa udp
US 8.8.8.8:53 drive.google.com udp
NL 172.217.168.238:443 drive.google.com tcp
US 8.8.8.8:53 238.168.217.172.in-addr.arpa udp
US 8.8.8.8:53 67.112.168.52.in-addr.arpa udp

Files

C:\Users\Admin\AppData\Local\Temp\nsp6CD4.tmp\System.dll

MD5 6ad39193ed20078aa1b23c33a1e48859
SHA1 95e70e4f47aa1689cc08afbdaef3ec323b5342fa
SHA256 b9631423a50c666faf2cc6901c5a8d6eb2fecd306fdd2524256b7e2e37b251c2
SHA512 78c89bb8c86f3b68e5314467eca4e8e922d143335081fa66b01d756303e1aec68ed01f4be7098dbe06a789ca32a0f31102f5ba408bc5ab28e61251611bb4f62b

memory/1608-142-0x0000000003260000-0x0000000006559000-memory.dmp

memory/1608-143-0x0000000003260000-0x0000000006559000-memory.dmp

memory/1608-144-0x0000000077351000-0x0000000077471000-memory.dmp

memory/1608-145-0x0000000010000000-0x0000000010006000-memory.dmp

memory/3636-146-0x0000000000400000-0x0000000001654000-memory.dmp

memory/3636-147-0x0000000001660000-0x0000000004959000-memory.dmp

memory/3636-148-0x0000000001660000-0x0000000004959000-memory.dmp

memory/3636-149-0x00000000773D8000-0x00000000773D9000-memory.dmp

memory/3636-159-0x0000000077351000-0x0000000077471000-memory.dmp

memory/3636-160-0x0000000000400000-0x0000000001654000-memory.dmp