MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 44a663bc646f29f072aacac558c728638406e0c6220f4d6e5fec71a39bde899a. 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: | 44a663bc646f29f072aacac558c728638406e0c6220f4d6e5fec71a39bde899a |
|---|---|
| SHA3-384 hash: | 57ef3fc19aa40b332e6e5fefc6dfa57743c8fef3b5aa3ba709a970bdbe1e21aa1598eaf4802efe170e65c69b6dc9681f |
| SHA1 hash: | 1e11981f9c74460bbd221e6ee4d35670eb2c5357 |
| MD5 hash: | 1179aae55da946ea6330046da383068c |
| humanhash: | violet-alaska-oxygen-earth |
| File name: | 44a663bc646f29f072aacac558c728638406e0c6220f4d6e5fec71a39bde899a |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 425'600 bytes |
| First seen: | 2026-01-09 15:26:32 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | f4639a0b3116c2cfc71144b88a929cfd (144 x GuLoader, 57 x Formbook, 46 x VIPKeylogger) |
| ssdeep | 12288:TXiR7PA9QWY+0dYHCbDqfZeFIWv5pWmoxUj+1Koj9FE+GSuMt1oS50gfctF4oIOV:TXiR7PA9QWY+0dYHCbDqfZeFIWv5pWmj |
| TLSH | T1EE940240BB44D8E3C6825D304D76B2339A74BD461A208B8727D8BF2F6D735A1DE0EB65 |
| 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 | c24e8ce030488ea6 (9 x GuLoader, 3 x VIPKeylogger, 1 x MassLogger) |
| Reporter |  adrian__luca |
| Tags: | exe GuLoader signed |
Code Signing Certificate
| Organisation: | Forbruskningens |
|---|---|
| Issuer: | Forbruskningens |
| Algorithm: | sha256WithRSAEncryption |
| Valid from: | 2025-11-01T05:28:34Z |
| Valid to: | 2026-11-01T05:28:34Z |
| Serial number: | 405f5daa5f6cf1e45b6ea1ea0681d9fb756c7668 |
| Thumbprint Algorithm: | SHA256 |
| Thumbprint: | 2640d316a259387bab497ad4d5717c8ea192b5b09ee783489acd1a792e77fa53 |
| Source: | This information was brought to you by ReversingLabs A1000 Malware Analysis Platform |
Intelligence
File Origin
# of uploads :
1
# of downloads :
122
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:
Factura - FV_2025_11_07_000272.rar
Verdict:
No threats detected
Analysis date:
2025-12-11 14:45:19 UTC
Tags:
arch-exec
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 injector virus nsis
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Creating a file in the %temp% subdirectories
Searching for the window
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug blackhole guloader installer installer installer-heuristic microsoft_visual_cc nsis overlay signed
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-12-07T23:09:00Z UTC
Last seen:
2026-01-10T20:51:00Z UTC
Hits:
~10000
Detections:
Trojan-PSW.SnakeLogger.HTTP.C&C HEUR:Trojan-Dropper.NSIS.Agent.gen HEUR:Trojan.Win32.Kryptik.gen
Verdict:
Unknown
Score:
99%
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
Verdict:
Malicious
Threat:
Family.GULOADER
Threat name:
Win32.Trojan.Generic
Status:
Suspicious
First seen:
2025-12-08 02:09:55 UTC
File Type:
PE (Exe)
Extracted files:
20
AV detection:
22 of 36 (61.11%)
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 Windows directory
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Guloader family
Guloader,Cloudeye
Verdict:
Suspicious
Tags:
n/a
YARA:
n/a
Unpacked files
SH256 hash:
44a663bc646f29f072aacac558c728638406e0c6220f4d6e5fec71a39bde899a
MD5 hash:
1179aae55da946ea6330046da383068c
SHA1 hash:
1e11981f9c74460bbd221e6ee4d35670eb2c5357
SH256 hash:
23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
MD5 hash:
192639861e3dc2dc5c08bb8f8c7260d5
SHA1 hash:
58d30e460609e22fa0098bc27d928b689ef9af78
SH256 hash:
89a82c4849c21dfe765052681e1fad02d2d7b13c8b5075880c52423dca72a912
MD5 hash:
b7d61f3f56abf7b7ff0d4e7da3ad783d
SHA1 hash:
15ab5219c0e77fd9652bc62ff390b8e6846c8e3e
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 |
File information
The table below shows additional information about this malware sample such as delivery method and external references.
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