MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 63f3a9264a8afae81e4cb56f5ade6ce4a8d9f7c20a6a977d07346d6aa769878f. 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: 13
| SHA256 hash: | 63f3a9264a8afae81e4cb56f5ade6ce4a8d9f7c20a6a977d07346d6aa769878f |
|---|---|
| SHA3-384 hash: | e1b43c5970f5ec39bad8b09ff85cb41748aa0af21df33f92087f9cf710c1b1a6d20012269817093dfdcf60bc719d29b2 |
| SHA1 hash: | 1afc5ff23b6806bea8b83335dc802403147b30b5 |
| MD5 hash: | 5bd9119dc59d21c67c67faf81f6ec8c2 |
| humanhash: | sodium-mars-solar-west |
| File name: | P0_#1037596.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 970'984 bytes |
| First seen: | 2026-05-20 17:45:06 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 9dda1a1d1f8a1d13ae0297b47046b26e (65 x Formbook, 48 x GuLoader, 28 x RemcosRAT) |
| ssdeep | 24576:SPdYZ6c4GLEmbWtr3YFyuZ+eB1SOSHxzdU3ja7tkU:+YkXmbWLeBUJ5Uk |
| TLSH | T13E252326B2A1D53BECB61532C8569EF637566D32D651062F5330FEDF3C33852823A628 |
| 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 |
Intelligence
File Origin
# of uploads :
1
# of downloads :
90
Origin country :
CHVendor Threat Intelligence
Malware configuration found for:
GuLoader
NSIS
Details
GuLoader
an XOR decryption key and an extracted component
GuLoader
a c2 URL, a useragent string, and a string XOR key
NSIS
extracted archive contents
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
Malicious activity
Analysis date:
2026-05-21 01:00:24 UTC
Tags:
auto-reg
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
70%
Tags:
injection obfusc crypt
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a window
Creating a file
Creating a file in the Windows subdirectories
Creating a file in the %AppData% subdirectories
Sending a custom TCP request
Verdict:
Unknown
Threat level:
2.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug expired-cert installer installer installer-heuristic microsoft_visual_cc nsis packed reconnaissance signed smb
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-05-20T15:56:00Z UTC
Last seen:
2026-05-21T03:51:00Z UTC
Hits:
~10
Verdict:
Unknown
Score:
97%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Malware.Heuristic
Status:
Malicious
First seen:
2026-05-20 18:45:36 UTC
AV detection:
7 of 37 (18.92%)
Threat level:
2/5
Detection(s):
Suspicious file
Result
Malware family:
guloader
Score:
10/10
Tags:
family:guloader discovery downloader persistence
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Adds Run key to start application
Executes dropped EXE
Loads dropped DLL
Family: Guloader,Cloudeye
Unpacked files
SH256 hash:
63f3a9264a8afae81e4cb56f5ade6ce4a8d9f7c20a6a977d07346d6aa769878f
MD5 hash:
5bd9119dc59d21c67c67faf81f6ec8c2
SHA1 hash:
1afc5ff23b6806bea8b83335dc802403147b30b5
SH256 hash:
9111099efe9d5c9b391dc132b2faf0a3851a760d4106d5368e30ac744eb42706
MD5 hash:
4add245d4ba34b04f213409bfe504c07
SHA1 hash:
ef756d6581d70e87d58cc4982e3f4d18e0ea5b09
Malware family:
GuLoader
Verdict:
Malicious
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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