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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 4081ef22d739bb9238171ab6d1b48a6bb18f44f964ebc7cb5e9cdea49d1f00c6. 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


Intelligence 13 IOCs YARA 5 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 4081ef22d739bb9238171ab6d1b48a6bb18f44f964ebc7cb5e9cdea49d1f00c6
SHA3-384 hash: 14f918712cbe16ab3034e8707d504594c7b349d86f23a5c581c4eea02a47e80d6be6a31f017515cdd78220f8756039c9
SHA1 hash: 95d39197ba983397117d432040587c87e7dc54b8
MD5 hash: 338b1bfd653efebcfd9728072adb9e80
humanhash: snake-april-ack-yankee
File name:4081ef22d739bb9238171ab6d1b48a6bb18f44f964ebc7cb5e9cdea49d1f00c6
Download: download sample
Signature GuLoader
Create hunting rule
File size:969'001 bytes
First seen:2026-07-07 14:58:31 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 46ce5c12b293febbeb513b196aa7f843 (48 x GuLoader, 21 x RemcosRAT, 15 x AgentTesla)
ssdeep 24576:tn3Cl2Aa4VuDXzI4uo5X5EQaZjM+KGp7vNNEM7s+d4s0:t3CcAaDff7jXGp7VH4s0
TLSH T1A02512916350C1B6C6A203B0EBEBF9F511837C2FFAA1094736A8FED93D31951451B29E
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 3178ccccccccccd4 (4 x GuLoader)
Reporter adrian__luca
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
101
Origin country :
HU HU
Vendor Threat Intelligence
Malware configuration found for:
GuLoader NSIS
Details
Link:
https://research.acce.ciphertechsolutions.com/results/e00dc282-b838-4c64-bb51-a49638c27c7e/
Malware family:
formbook
Create hunting rule
ID:
1
File name:
22062026_1232_17062026_Doc3008389937882.rar
Verdict:
Malicious activity
Analysis date:
2026-07-07 15:02:05 UTC
Tags:
arch-exec formbook xloader stealer
Link:
https://app.any.run/tasks/30f63f2d-2d6e-4e87-a461-1fbb67632982

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Link:
https://www.capesandbox.com/analysis/73635/
Verdict:
Malicious
Score:
92.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a4d25ccdf078fe3c153f3cd
Tags:
injection virus blic
Result
Verdict:
Suspicious
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
Unauthorized injection to a recently created process
Restart of the analyzed sample
DNS request
Connection attempt
Sending a custom TCP request
Sending an HTTP GET request
Searching for synchronization primitives
Launching the default Windows debugger (dwwin.exe)
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug installer installer installer-heuristic microsoft_visual_cc nsis reconnaissance
Link:
https://www.filescan.io/uploads/6a4d1f6dc04cb370831350cd/reports/037e5eb7-54a9-4f33-8a1b-cadd769768a4/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/4081ef22d739bb9238171ab6d1b48a6bb18f44f964ebc7cb5e9cdea49d1f00c6
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-06-17T06:55:00Z UTC
Last seen:
2026-07-09T06:51:00Z UTC
Hits:
~1000
Detections:
VHO:Trojan-Downloader.Win32.Minix.gen Trojan.Win32.Guloader.sb Trojan.NSIS.Makoob.sba Trojan-Downloader.Win32.Minix.sb Trojan-Downloader.Win32.Minix.cwd HEUR:Trojan.NSIS.Agent.gen
Link:
https://opentip.kaspersky.com/4081ef22d739bb9238171ab6d1b48a6bb18f44f964ebc7cb5e9cdea49d1f00c6/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/3ef0a5c0-716b-4ba6-ae83-e207952d1642
Score:
95%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/4081ef22d739bb9238171ab6d1b48a6bb18f44f964ebc7cb5e9cdea49d1f00c6
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/4081ef22d739bb9238171ab6d1b48a6bb18f44f964ebc7cb5e9cdea49d1f00c6/
Threat name:
Win32.Malware.Heuristic
Create hunting rule
Status:
Malicious
First seen:
2026-06-17 12:57:34 UTC
File Type:
PE (Exe)
Extracted files:
16
AV detection:
17 of 24 (70.83%)
Threat level:
  2/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=ica66iwxhg5zeoaxdk3ndneknoyy6rhzmtv4ps26ttpkjhi7adda._file
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader adware discovery downloader persistence spyware
Link:
https://tria.ge/reports/260707-tc2xvsgz6z/
Behaviour
Checks SCSI registry key(s)
Modifies Internet Explorer settings
Modifies registry class
Suspicious behavior: EnumeratesProcesses
Suspicious behavior: MapViewOfSection
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
Program crash
System Location Discovery: System Language Discovery
Drops file in Program Files directory
Drops file in Windows directory
Suspicious use of NtCreateThreadExHideFromDebugger
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Enumerates connected drives
Loads dropped DLL
Boot or Logon Autostart Execution: Active Setup
Family: Guloader,Cloudeye
Unpacked files
SH256 hash:
4081ef22d739bb9238171ab6d1b48a6bb18f44f964ebc7cb5e9cdea49d1f00c6
MD5 hash:
338b1bfd653efebcfd9728072adb9e80
SHA1 hash:
95d39197ba983397117d432040587c87e7dc54b8
Link:
https://www.unpac.me/results/5dccab2d-c75e-43f5-8f30-2f9d71328ae7/
SH256 hash:
996645d7f16a6294babb6da83478062aed7b72318d7a51b66e90ab5d3edc51a5
MD5 hash:
6d08f0d5503bb100b8429fefaad163a6
SHA1 hash:
2a79aac2d3b715326c3dcd3c5cf2e33de3632a0a
Link:
https://www.unpac.me/results/5dccab2d-c75e-43f5-8f30-2f9d71328ae7/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/4081ef22d739/report/overview.html
Please note that we are no longer able to provide a coverage score for Virus Total.

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
Create hunting rule
Author:Obscurity Labs LLC
Description:Detects NSIS installers by .ndata section + NSIS header string
Rule name:NSIS
Create hunting rule
Author:kevoreilly
Description:NSIS Integrity Check function
Rule name:pe_detect_tls_callbacks
Create hunting rule
Rule name:pe_no_import_table
Create hunting rule
Description:Detect pe file that no import table
Rule name:VECT_Ransomware
Create hunting rule
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.

Cape
Cape
https://www.capesandbox.com/analysis/73635/

Comments