MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 b405b7e4ae3b2a86014ff68fcdf33bb3f428179d919398bf620eccd31f5500c9. 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: 14
| SHA256 hash: | b405b7e4ae3b2a86014ff68fcdf33bb3f428179d919398bf620eccd31f5500c9 |
|---|---|
| SHA3-384 hash: | f7dbca8ad7c82e213151ed48e1212cc14900013cacac298aa4e1d68535433811b52227b545fc7163465cb031083855df |
| SHA1 hash: | 6207289b85c1445693348e04d317ab2d60502add |
| MD5 hash: | 05cbbfc932ca1129230508d8bc97aa7c |
| humanhash: | tennessee-maine-kitten-virginia |
| File name: | b405b7e4ae3b2a86014ff68fcdf33bb3f428179d919398bf620eccd31f5500c9 |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 296'736 bytes |
| First seen: | 2026-05-08 12:20:48 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 7eae418c7423834ffc3d79b4300bd6fb (66 x GuLoader, 23 x RemcosRAT, 21 x AgentTesla) |
| ssdeep | 6144:HlHXel6AWB0UjaknErEtVtzHG61MySk2yb9ZK7gRSa+0uUNUk:QlTkayw0BHG6FSY9ZdYUNUk |
| Threatray | 409 similar samples on MalwareBazaar |
| TLSH | T1195412217300CE63E9A84A72887397BF8FBDC52429209E575750FB2EBD72372D61E605 |
| 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 |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Stimulated |
|---|---|
| Issuer: | Stimulated |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2026-03-09T08:36:12Z |
| Valid to: | 2027-03-09T08:36:12Z |
| Serial number: | 53e0231d58286c7a74cb80a07050580fadc4235a |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 4bcd0381dc344307603cc4c3be52735d31c5503125d7b97cd1eedbbe014f515d |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
105
Origin country :
HUVendor 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:
remcos
ID:
1
File name:
sale4@cho.com.tw.eml
Verdict:
Malicious activity
Analysis date:
2026-04-10 03:13:00 UTC
Tags:
attachments attc-unc susp-attachments arch-exec rat remcos
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Gathering data
Result
Verdict:
Suspicious
Maliciousness:
Behaviour
Creating a window
Searching for the window
Creating a file in the %AppData% subdirectories
Creating a file in the %temp% subdirectories
Delayed reading of the file
Launching a service
Unauthorized injection to a recently created process
Restart of the analyzed sample
Changing a file
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-03-31T03:18:00Z UTC
Last seen:
2026-05-10T00:03:00Z UTC
Hits:
~100
Detections:
Trojan.NSIS.Makoob.sba Trojan-Downloader.Win32.Minix.sb HEUR:Trojan-Downloader.Win32.Minix.gen HEUR:Trojan.NSIS.GuLoader.gen Trojan.Win32.Guloader.sb
Verdict:
Unknown
Score:
96%
Verdict:
Malware
File Type:
PE
Gathering data
Verdict:
Malicious
Threat:
Family.GULOADER
Threat name:
Win32.Malware.Heuristic
Status:
Malicious
First seen:
2026-03-31 06:47:52 UTC
File Type:
PE (Exe)
Extracted files:
10
AV detection:
21 of 36 (58.33%)
Threat level:
2/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 399 additional samples on MalwareBazaar
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 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:
b405b7e4ae3b2a86014ff68fcdf33bb3f428179d919398bf620eccd31f5500c9
MD5 hash:
05cbbfc932ca1129230508d8bc97aa7c
SHA1 hash:
6207289b85c1445693348e04d317ab2d60502add
SH256 hash:
6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba
MD5 hash:
8cf2ac271d7679b1d68eefc1ae0c5618
SHA1 hash:
7cc1caaa747ee16dc894a600a4256f64fa65a9b8
SH256 hash:
c5ba017732597a82f695b084d1aa7fe3b356168cc66105b9392a9c5b06be5188
MD5 hash:
ec9640b70e07141febbe2cd4cc42510f
SHA1 hash:
64a5e4b90e5fe62aa40e7ac9e16342ed066f0306
Malware family:
GuLoader
Verdict:
Malicious
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.
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