MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 fa47f8ed6df07f9af55e237559196b7808d5f1babaf3b86201f7ba1eae674b66. 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: | fa47f8ed6df07f9af55e237559196b7808d5f1babaf3b86201f7ba1eae674b66 |
|---|---|
| SHA3-384 hash: | 4ef2793e1719aaf560683bd39df28182648e86d18fbc3d98ed9b95b58c3b7a607f864a1982caa0216494f1d208fa4547 |
| SHA1 hash: | b5ea4e2bf70e61839cf5cce6201d972ebe4cebd2 |
| MD5 hash: | 31662b7222b0bbc254dd2d7e2f1a8195 |
| humanhash: | spaghetti-pennsylvania-angel-queen |
| File name: | PO-636454645353553.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 401'936 bytes |
| First seen: | 2026-05-20 16:54:49 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f4639a0b3116c2cfc71144b88a929cfd (145 x GuLoader, 57 x Formbook, 47 x VIPKeylogger) |
| ssdeep | 6144:kfY+onfHhDRt/tGcFoPf6lnwbj0aukGyr7v+QqqnACmNz1PEQR8dqwiw:kfYbHh1RToPfqwboaZj7/LmNqh |
| TLSH | T12B842302F290C616D4666736083817BB1B5E3FDE50996B9F47C49D2EBEA1243E80FF94 |
| 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 | c4dadadad2f492c2 (149 x GuLoader, 55 x RemcosRAT, 23 x VIPKeylogger) |
| Reporter |  TomU |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Fortringernes |
|---|---|
| Issuer: | Fortringernes |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2026-03-30T03:13:49Z |
| Valid to: | 2027-03-30T03:13:49Z |
| Serial number: | 3762ddf465d9c3365b595f32530a211d7a1ec23d |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 39bcad1b957caef0ac4db9bf43281b18e3f2ee09e5f9864f844af44c4ed30264 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
95
Origin country :
CHVendor Threat Intelligence
Malware family:
guloader
ID:
1
File name:
tar
Verdict:
Malicious activity
Analysis date:
2026-05-20 17:55:43 UTC
Tags:
arch-exec guloader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
92.5%
Tags:
injection obfusc virus
Result
Verdict:
Clean
Maliciousness:
Behaviour
Creating a window
Searching for the window
Creating a file
Creating a file in the %AppData% directory
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Delayed reading of the file
Sending a custom TCP request
Restart of the analyzed sample
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug installer installer installer-heuristic microsoft_visual_cc nsis phishing reconnaissance signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-04-20T03:45:00Z UTC
Last seen:
2026-05-22T03:36:00Z UTC
Hits:
~1000
Verdict:
Unknown
Score:
95%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Trojan.Guloader
Status:
Suspicious
First seen:
2026-04-20 06:30:01 UTC
File Type:
PE (Exe)
Extracted files:
6
AV detection:
24 of 38 (63.16%)
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
Loads dropped DLL
Family: Guloader,Cloudeye
Unpacked files
SH256 hash:
fa47f8ed6df07f9af55e237559196b7808d5f1babaf3b86201f7ba1eae674b66
MD5 hash:
31662b7222b0bbc254dd2d7e2f1a8195
SHA1 hash:
b5ea4e2bf70e61839cf5cce6201d972ebe4cebd2
SH256 hash:
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
MD5 hash:
192639861e3dc2dc5c08bb8f8c7260d5
SHA1 hash:
58d30e460609e22fa0098bc27d928b689ef9af78
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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