guloader | 3bdc3b84e2970207b3e67191c3665ff676a5dfdab8331e4cd4787dee7decda82

Analysis

max time kernel
164s
max time network
169s
platform
windows11-ltsc_2024_x64
resource
win11ltsc2024-20260709-en
resource tags

arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
submitted
04/08/2026, 12:19

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General

Target
Justificante.exe
Size 457KB
Sample260804-pg778aem4z
SHA256 3bdc3b84e2970207b3e67191c3665ff676a5dfdab8331e4cd4787dee7decda82
MD5 d626ee1ad7c9abf27d97bcc0ed8d2152
SHA1 db9defd3b976c429e32d3bda89d93cecc7b6ba83
SHA512 915173d5abfeb0159e0193ea942561205f1136e7987658c7fe051d19bcb5233796f6ae9c764c42c3cbeb82adea938d7650b05eeae41c8936ed3719fec90e9277
SSDEEP 12288:ziD2LbgZ+UVAJZZcVBiB6at5W+x4sJMrZe+FoPT606:4hZTAtB6at5WKMrZeMQuv
TLSH
T1B6A4F11A2FAEDD07E5939EB80A60D33A92B41BC059BDC7069F211D23797D7D36E881C1
MD5 SHA1 SHA512 SSDEEP TLSH

Score

10^/10

discovery downloader guloader

Malware Config

Signatures

Family: Guloader,Cloudeye
A shellcode based downloader first seen in 2020.
downloader guloader

Loads dropped DLL 1 IoCs

pid	Process
5496	Justificante.exe

Contacts third-party web service commonly abused for C2 1 TTPs 3 IoCs

Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

Web Service

T1102

flow	ioc
1	drive.google.com
14	drive.google.com
19	drive.google.com

Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs

pid	Process
5496	Justificante.exe
2796	Justificante.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Justificante.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	Justificante.exe

Suspicious behavior: MapViewOfSection 1 IoCs

pid	Process
5496	Justificante.exe

Suspicious use of WriteProcessMemory 4 IoCs

description	pid	Process	procid_target
PID 5496 wrote to memory of 4508	5496	Justificante.exe	91
PID 5496 wrote to memory of 2796	5496	Justificante.exe	92
PID 5496 wrote to memory of 2796	5496	Justificante.exe	92
PID 2796 wrote to memory of 4876	2796	Justificante.exe	93

C:\Users\Admin\AppData\Local\Temp\Justificante.exe
"C:\Users\Admin\AppData\Local\Temp\Justificante.exe"
1⤵
- Loads dropped DLL
- Suspicious use of NtSetInformationThreadHideFromDebugger
- System Location Discovery: System Language Discovery
- Suspicious behavior: MapViewOfSection
- Suspicious use of WriteProcessMemory
PID:5496
- C:\Users\Admin\AppData\Local\Temp\Justificante.exe
  "C:\Users\Admin\AppData\Local\Temp\Justificante.exe"
  2⤵
  PID:4508
- C:\Users\Admin\AppData\Local\Temp\Justificante.exe
  "C:\Users\Admin\AppData\Local\Temp\Justificante.exe"
  2⤵
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:2796
- - C:\Users\Admin\AppData\Local\Temp\Justificante.exe
    "C:\Users\Admin\AppData\Local\Temp\Justificante.exe"
    3⤵
    PID:4876

Network

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Information Discovery

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Web Service

T1102

Exfiltration

Impact

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Downloads

System.dll

Path C:\Users\Admin\AppData\Local\Temp\nsg9273.tmp\System.dll
Size 11KB
SHA256 b80a5cba69d1853ed5979b0ca0352437bf368a5cfb86cb4528edadd410e11352
MD5 c9473cb90d79a374b2ba6040ca16e45c
SHA1 ab95b54f12796dce57210d65f05124a6ed81234a
SHA512 eafe7d5894622bc21f663bca4dd594392ee0f5b29270b6b56b0187093d6a3a103545464ff6398ad32d2cf15dab79b1f133218ba9ba337ddc01330b5ada804d7b
SSDEEP 192:cPtkumJX7zBE2kGwfy9S9VkPsFQ1MZ1c:N7O2k5q9wA1MZa
TLSH
T1B2324C15031086F3E1D2853D682B39AB2FB969118AF04E438FB36952FE346C7AD79352
MD5 SHA1 SHA512 SSDEEP TLSH

Submit Download

memory/2796-14-0x0000000001770000-0x0000000003213000-memory.dmp

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memory/2796-15-0x0000000000480000-0x0000000001766000-memory.dmp

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memory/2796-16-0x0000000001770000-0x0000000003213000-memory.dmp

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memory/5496-12-0x0000000006160000-0x0000000007C03000-memory.dmp

Download

memory/5496-13-0x0000000010004000-0x0000000010005000-memory.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v16

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Downloads