MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 3e5b41e258fb843f6305b8381be4377aeaf6beb83b59c7578dfc226d2bd9a55a. 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: | 3e5b41e258fb843f6305b8381be4377aeaf6beb83b59c7578dfc226d2bd9a55a |
|---|---|
| SHA3-384 hash: | f5a3f24960e8c18960cd3e17fa3cae3ea7fc52443c54a79053276aa9747856e8dc3913fb1a43e557370f6a226c719f22 |
| SHA1 hash: | 33c497bcdb6d1b079d0b4dacaa1642d9c2d96aeb |
| MD5 hash: | 1e793c452e11b0f0ccedb67137909bfb |
| humanhash: | thirteen-glucose-uranus-diet |
| File name: | 3e5b41e258fb843f6305b8381be4377aeaf6beb83b59c7578dfc226d2bd9a55a |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 549'112 bytes |
| First seen: | 2025-12-08 14:57:19 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | 7eae418c7423834ffc3d79b4300bd6fb (65 x GuLoader, 23 x RemcosRAT, 19 x AgentTesla) |
| ssdeep | 12288:4UBbS5XZQPVmoRovpt01jVfDxueFClgCUniZaQnV2:hVSDQd7qvpt01xfFusCTUnMaQns |
| Threatray | 2'339 similar samples on MalwareBazaar |
| TLSH | T15AC4122DFB83EC27CE76503056B5D97B95B0E66475773E03AE978AEEDF60E024A09100 |
| TrID | 47.3% (.EXE) Win32 Executable MS Visual C++ (generic) (31206/45/13) 15.9% (.EXE) Win64 Executable (generic) (10522/11/4) 9.9% (.DLL) Win32 Dynamic Link Library (generic) (6578/25/2) 7.6% (.EXE) Win16 NE executable (generic) (5038/12/1) 6.8% (.EXE) Win32 Executable (generic) (4504/4/1) |
| Magika | pebin |
| dhash icon | 58f8b4909888f8dc (1 x GuLoader) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader |
Intelligence
File Origin
# of uploads :
1
# of downloads :
104
Origin country :
HUVendor Threat Intelligence
Malware configuration found for:
GuLoader
NSIS
Details
GuLoader
a c2 URL, a useragent string, and a string XOR key
GuLoader
an XOR decryption key and an extracted component
NSIS
extracted archive contents
Malware family:
n/a
ID:
1
File name:
3e5b41e258fb843f6305b8381be4377aeaf6beb83b59c7578dfc226d2bd9a55a
Verdict:
Malicious activity
Analysis date:
2025-12-08 19:28:11 UTC
Tags:
n/a
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Guloader
Verdict:
Malicious
Score:
90.2%
Tags:
injection obfusc virus nsis
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-11-13T00:27:00Z UTC
Last seen:
2025-12-10T02:54:00Z UTC
Hits:
~1000
Verdict:
Unknown
Score:
90%
Verdict:
Malware
File Type:
PE
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Threat name:
Win32.Trojan.Guloader
Status:
Malicious
First seen:
2025-11-13 03:37:37 UTC
AV detection:
13 of 24 (54.17%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 2'329 additional samples on MalwareBazaar
Result
Malware family:
guloader
Score:
10/10
Tags:
family:formbook family:guloader discovery downloader rat spyware stealer trojan
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Loads dropped DLL
Formbook payload
Formbook
Formbook family
Guloader family
Guloader,Cloudeye
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
3e5b41e258fb843f6305b8381be4377aeaf6beb83b59c7578dfc226d2bd9a55a
MD5 hash:
1e793c452e11b0f0ccedb67137909bfb
SHA1 hash:
33c497bcdb6d1b079d0b4dacaa1642d9c2d96aeb
SH256 hash:
6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba
MD5 hash:
8cf2ac271d7679b1d68eefc1ae0c5618
SHA1 hash:
7cc1caaa747ee16dc894a600a4256f64fa65a9b8
SH256 hash:
c5ba017732597a82f695b084d1aa7fe3b356168cc66105b9392a9c5b06be5188
MD5 hash:
ec9640b70e07141febbe2cd4cc42510f
SHA1 hash:
64a5e4b90e5fe62aa40e7ac9e16342ed066f0306
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: | DebuggerCheck__API |
|---|---|
| Reference: | https://github.com/naxonez/yaraRules/blob/master/AntiDebugging.yara |
| Rule name: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | Detect_NSIS_Nullsoft_Installer |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects NSIS installers by .ndata section + NSIS header string |
| Rule name: | golang_bin_JCorn_CSC846 |
|---|---|
| Author: | Justin Cornwell |
| Description: | CSC-846 Golang detection ruleset |
| Rule name: | pe_detect_tls_callbacks |
|---|
| Rule name: | PE_Digital_Certificate |
|---|---|
| Author: | albertzsigovits |
| Rule name: | pe_no_import_table |
|---|---|
| Description: | Detect pe file that no import table |
| Rule name: | shellcode |
|---|---|
| Author: | nex |
| Description: | Matched shellcode byte patterns |
| Rule name: | Sus_CMD_Powershell_Usage |
|---|---|
| Author: | XiAnzheng |
| Description: | May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP) |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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