MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 38f4ce7689e3aa05b30b6fa590f0de48ffb4fba1bfc47df3f5765d62c62422bb. 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: | 38f4ce7689e3aa05b30b6fa590f0de48ffb4fba1bfc47df3f5765d62c62422bb |
|---|---|
| SHA3-384 hash: | f68f150c2ce3f33f53863ef99a82c06a5d4ce424250135762b9e2393907dd5275a75bb94135463ea51b6080b6331bf1b |
| SHA1 hash: | b4aebe235a7955575916e3045fd5d1f9c24e1dda |
| MD5 hash: | aa2fd01ae69486d53264869144d0bebf |
| humanhash: | pluto-mars-two-sink |
| File name: | scan_0218pdf.exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 914'880 bytes |
| First seen: | 2026-05-20 17:32:47 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 46ce5c12b293febbeb513b196aa7f843 (47 x GuLoader, 21 x RemcosRAT, 15 x AgentTesla) |
| ssdeep | 12288:NX4puwfzUnMxLdaimcqUgsp/yVFDmbNTZJ0cQC1fH2MeZWXTYdSQJw/13OK2fKKy:V4puNQucYiyVFa0cuZWDYEgmVAsj |
| TLSH | T11815332A5374139BF51905306ED5AFFC6DE12C25858C839F4346FAC96E627A24C3B83E |
| 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 (148 x GuLoader, 51 x RemcosRAT, 23 x VIPKeylogger) |
| Reporter |  TomU |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Smeltende |
|---|---|
| Issuer: | Smeltende |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-08-08T08:11:52Z |
| Valid to: | 2026-08-08T08:11:52Z |
| Serial number: | 043594c611dd9356aa77e62243e3f2b6daced2b0 |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 4460260bd8ffe6aba891178bfe1658392b4610aae154e8af74ace95cd8e935e7 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
85
Origin country :
CHVendor Threat Intelligence
Malware configuration found for:
NSIS
Details
NSIS
extracted archive contents
Malware family:
guloader
ID:
1
File name:
exe
Verdict:
Malicious activity
Analysis date:
2026-05-20 23:05:13 UTC
Tags:
guloader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
93.3%
Tags:
injection obfusc virus
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a file in the %temp% directory
Creating a window
Searching for the window
Creating a file in the %AppData% subdirectories
Creating a file in the Program Files subdirectories
Delayed reading of the file
Creating a file
Sending a custom TCP request
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug guloader installer installer installer-heuristic microsoft_visual_cc nsis reconnaissance signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-08-31T22:08:00Z UTC
Last seen:
2026-05-22T08:44:00Z UTC
Hits:
~10000
Verdict:
Unknown
Score:
99%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Trojan.Guloader
Status:
Malicious
First seen:
2025-09-01 03:53:48 UTC
File Type:
PE (Exe)
Extracted files:
7
AV detection:
18 of 24 (75.00%)
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
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Family: Guloader,Cloudeye
Unpacked files
SH256 hash:
38f4ce7689e3aa05b30b6fa590f0de48ffb4fba1bfc47df3f5765d62c62422bb
MD5 hash:
aa2fd01ae69486d53264869144d0bebf
SHA1 hash:
b4aebe235a7955575916e3045fd5d1f9c24e1dda
SH256 hash:
8b4c47c4cf5e76ec57dd5a050d5acd832a0d532ee875d7b44f6cdaf68f90d37c
MD5 hash:
9b38a1b07a0ebc5c7e59e63346ecc2db
SHA1 hash:
97332a2ffcf12a3e3f27e7c05213b5d7faa13735
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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