MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 631e3275d1830100cc76d3dda6b82aa9bdaa3a620ff682d00e6191e3830b3166. 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: | 631e3275d1830100cc76d3dda6b82aa9bdaa3a620ff682d00e6191e3830b3166 |
|---|---|
| SHA3-384 hash: | 5b02f10a95a7e330d95294de50213d4cc27c2431df7f84e682612335509687fdc060f61ada5acf368612de306670d6c9 |
| SHA1 hash: | 8d9e9ede7d8d0354955e7c18328fe30a73c8537b |
| MD5 hash: | 84488ff3ff0f2a00d363b0d235a1a234 |
| humanhash: | jersey-cold-two-seven |
| File name: | FACTURA_Nº_2254689.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 413'416 bytes |
| First seen: | 2026-05-20 17:03:51 UTC |
| Last seen: | 2026-05-20 17:44:55 UTC |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | e2a592076b17ef8bfb48b7e03965a3fc (419 x GuLoader, 63 x RemcosRAT, 52 x AgentTesla) |
| ssdeep | 6144:0LsBN8xoIy7fXjhQVJPZR2yJexyEcBcUT8fQR5PKQt:PBb7fXjhwPm0exy9BcU4foKQ |
| TLSH | T1B794487EB6D7F422EB58C979BD59DA5E0950DDC003BC0B1ED3F03AA975B6A42B10B108 |
| 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 |
| dhash icon | 60f0b262b1f27419 (1 x GuLoader) |
| Reporter |  TomU |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Vizirate |
|---|---|
| Issuer: | Vizirate |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-10-27T00:13:55Z |
| Valid to: | 2026-10-27T00:13:55Z |
| Serial number: | 385c81648c1882cf377601d0f4614f1949ba5c26 |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | b0fe07f5e58127780e84ae22a187741275e8d9f1ba64a991bd18d06e8e81e89c |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
2
# of downloads :
71
Origin country :
CHVendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
Malicious activity
Analysis date:
2026-05-20 20:05:22 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
94.1%
Tags:
injection virus blic
Result
Verdict:
Malware
Maliciousness:
Behaviour
Searching for the window
Creating a file
Creating a file in the %temp% subdirectories
Delayed reading of the file
Unauthorized injection to a recently created process
Creating a process from a recently created file
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug base64 installer installer installer-heuristic masquerade microsoft_visual_cc nsis reconnaissance signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-12-03T07:00:00Z UTC
Last seen:
2026-05-21T11:40:00Z UTC
Hits:
~1000
Verdict:
Unknown
Score:
97%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Trojan.Generic
Status:
Suspicious
First seen:
2025-12-03 11:18:45 UTC
File Type:
PE (Exe)
Extracted files:
19
AV detection:
23 of 37 (62.16%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
guloader
Score:
10/10
Tags:
family:guloader discovery downloader
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Family: Guloader,Cloudeye
Unpacked files
SH256 hash:
631e3275d1830100cc76d3dda6b82aa9bdaa3a620ff682d00e6191e3830b3166
MD5 hash:
84488ff3ff0f2a00d363b0d235a1a234
SHA1 hash:
8d9e9ede7d8d0354955e7c18328fe30a73c8537b
SH256 hash:
bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb
MD5 hash:
17ed1c86bd67e78ade4712be48a7d2bd
SHA1 hash:
1cc9fe86d6d6030b4dae45ecddce5907991c01a0
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
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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