MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 88287f70307150fc1f469bf08e49dee581cdce1900dcf477a08d010e90fef57d. While MalwareBazaar tries to identify whether the sample provided is malicious or not, there is no guarantee that a sample in MalwareBazaar is malicious.
Database Entry
GuLoader
Vendor detections: 12
| SHA256 hash: | 88287f70307150fc1f469bf08e49dee581cdce1900dcf477a08d010e90fef57d |
|---|---|
| SHA3-384 hash: | 09f8899c089f571d3091ff7a6a339896e4b9d7e30ed06364234b0a58d9fa561aacf65e81058effc21d92ed101dd345de |
| SHA1 hash: | 20307672fd0b0f40ad0e6d035445b395578abfae |
| MD5 hash: | ee9064c9429ce71f8840108fd27efcde |
| humanhash: | fanta-solar-shade-shade |
| File name: | JUSTIFICANTE_PAGO_FACTURA_PROFORMA-978778774545223154.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 826'160 bytes |
| First seen: | 2026-05-20 17:55:18 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f4639a0b3116c2cfc71144b88a929cfd (144 x GuLoader, 57 x Formbook, 46 x VIPKeylogger) |
| ssdeep | 24576:7fYuPz30Oo2mDqFscQFAEIoOf7JGpbtg2:jPokeAE9OzUrg2 |
| TLSH | T1AD05DF3EAE93F421EB98C578BD18FE8D1D10C9C407BC1B5E97B16A2938A5E41B40F16D |
| TrID | 50.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 10.6% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 10.5% (.EXE) Win64 Executable (generic) (6522/11/2) 8.1% (.EXE) Win16 NE executable (generic) (5038/12/1) 7.2% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| Reporter |  TomU |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Friederichs |
|---|---|
| Issuer: | Friederichs |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-02-12T01:38:05Z |
| Valid to: | 2026-02-12T01:38:05Z |
| Serial number: | 6f4cac3cea2f7fb04342d259db1af4cb000f5c4d |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | dc1251bf9ad6e52ec576eaceb5a1bce8d12c1f0c490b6db0d46c1ecc9e613ec5 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
88
Origin country :
CHVendor Threat Intelligence
Malware configuration found for:
NSIS
Details
NSIS
extracted archive contents
Malware family:
n/a
ID:
1
File name:
JUSTIFICANTE PAGO FACTURA PROFORMA-978778774545223154.exe
Verdict:
Malicious activity
Analysis date:
2025-04-10 23:51:10 UTC
Tags:
snake keylogger telegram evasion stealer
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
99.1%
Tags:
injection uloader virus nsis
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a window
Creating a file
Launching a process
Sending a custom TCP request
Using the Windows Management Instrumentation requests
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug expired-cert guloader installer installer installer-heuristic masquerade microsoft_visual_cc nsis reconnaissance signed
Verdict:
Malicious
Labled as:
Trojan.Generic
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-04-09T09:21:00Z UTC
Last seen:
2026-05-22T14:26:00Z UTC
Hits:
~100000
Verdict:
Unknown
Score:
97%
Verdict:
Malware
File Type:
PE
Gathering data
Verdict:
Malicious
Threat name:
Win32.Trojan.GuLoader
Status:
Malicious
First seen:
2025-04-09 12:37:33 UTC
File Type:
PE (Exe)
Extracted files:
17
AV detection:
26 of 38 (68.42%)
Threat level:
5/5
Result
Malware family:
guloader
Score:
10/10
Tags:
family:guloader discovery downloader execution persistence ransomware
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
Command and Scripting Interpreter: PowerShell
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of NtSetInformationThreadHideFromDebugger
Badlisted process makes network request
Contacts third-party web service commonly abused for C2
Family: Guloader,Cloudeye
Unpacked files
SH256 hash:
88287f70307150fc1f469bf08e49dee581cdce1900dcf477a08d010e90fef57d
MD5 hash:
ee9064c9429ce71f8840108fd27efcde
SHA1 hash:
20307672fd0b0f40ad0e6d035445b395578abfae
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
YARA Signatures
MalwareBazaar uses YARA rules from several public and non-public repositories, such as YARAhub and Malpedia. Those are being matched against malware samples uploaded to MalwareBazaar as well as against any suspicious process dumps they may create. Please note that only results from TLP:CLEAR rules are being displayed.
| Rule name: | Detect_NSIS_Nullsoft_Installer |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects NSIS installers by .ndata section + NSIS header string |
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| Rule name: | VECT_Ransomware |
|---|---|
| Author: | Mustafa Bakhit |
| Description: | Detects activity associated with VECT ransomware. This includes registry modifications and deletions, execution of system and defense-evasion commands, suspicious API usage, mutex creation, file and memory manipulation, ransomware note generation, anti-debugging and anti-analysis techniques, and embedded cryptographic constants (SHA256) characteristic of this malware family. Designed for threat intelligence and malware detection environments. |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
Malspam
Delivery method
Distributed via e-mail attachment
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