MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 6ba3a37ac78eef40080be3a47e0ebcc30619221480d5bdd60a97fd571bda2ba2. 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: 15
| SHA256 hash: | 6ba3a37ac78eef40080be3a47e0ebcc30619221480d5bdd60a97fd571bda2ba2 |
|---|---|
| SHA3-384 hash: | fb7974eb78c734e6121347de4e9438cdfe7a44c447c9eaf2ee5c23b9a981dcfa8a4a6257b4afc403738f2b8652d089c0 |
| SHA1 hash: | c87881a891fa05cd1c4caa8cc10451359db163f4 |
| MD5 hash: | c176fa88d211acc3d63d6c8d3cf8d5a6 |
| humanhash: | winter-football-blossom-magazine |
| File name: | Bunker_(STS)_Notification..exe |
| Download: | download sample |
| Signature | GuLoader |
| File size: | 634'642 bytes |
| First seen: | 2026-05-20 17:47:30 UTC |
| Last seen: | Never |
| File type: |  exe |
| MIME type: | application/x-dosexec |
| imphash | b78ecf47c0a3e24a6f4af114e2d1f5de (310 x GuLoader, 23 x Formbook, 21 x RemcosRAT) |
| ssdeep | 12288:5UVC9GIaG5ez13NhJN6U+c7DK3YKFQC0ncfFF9AUiDeDx3E:KVzK5ez13N56UP7RKFQC0cdqDeDB |
| Threatray | 2'396 similar samples on MalwareBazaar |
| TLSH | T10FD412912E9CC99AD3B1C135A373CBE48135ED2817F650D3E3B97B7E187E595288B102 |
| 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 | e8ccc894b484f87d (5 x GuLoader) |
| Reporter |  TomU |
| Tags: | exe GuLoader |
Intelligence
File Origin
# of uploads :
1
# of downloads :
82
Origin country :
CHVendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Malware family:
formbook
ID:
1
File name:
ce8a3166-3e79-4d3e-5ffc-08dd51511551.rar
Verdict:
Malicious activity
Analysis date:
2025-02-23 02:18:26 UTC
Tags:
arch-exec stealer formbook xloader
Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
n/a
Verdict:
Malicious
Score:
96.5%
Tags:
injection uloader virus nsis
Result
Verdict:
Malware
Maliciousness:
Behaviour
Creating a window
Creating a file
Creating a file in the %temp% subdirectories
Searching for the window
Delayed reading of the file
Verdict:
Likely Malicious
Threat level:
7.5/10
Confidence:
100%
Tags:
anti-debug installer installer installer-heuristic masquerade microsoft_visual_cc nsis reconnaissance
Verdict:
Malicious
File Type:
exe x32
First seen:
2025-02-19T21:01:00Z UTC
Last seen:
2026-05-19T16:36:00Z UTC
Hits:
~10000
Malware family:
NSIS
Verdict:
Unknown
Score:
83%
Verdict:
Malware
File Type:
PE
Gathering data
Threat name:
Win32.Trojan.GuLoader
Status:
Malicious
First seen:
2025-02-20 00:00:14 UTC
File Type:
PE (Exe)
Extracted files:
11
AV detection:
25 of 38 (65.79%)
Threat level:
5/5
Detection(s):
Suspicious file
Verdict:
malicious
Label(s):
cloudeye
Similar samples:
+ 2'386 additional samples on MalwareBazaar
Result
Malware family:
guloader
Score:
10/10
Tags:
family:guloader discovery downloader installer
Behaviour
Suspicious behavior: MapViewOfSection
Suspicious use of WriteProcessMemory
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Suspicious use of NtSetInformationThreadHideFromDebugger
Contacts third-party web service commonly abused for C2
Loads dropped DLL
Family: Guloader,Cloudeye
Unpacked files
SH256 hash:
6ba3a37ac78eef40080be3a47e0ebcc30619221480d5bdd60a97fd571bda2ba2
MD5 hash:
c176fa88d211acc3d63d6c8d3cf8d5a6
SHA1 hash:
c87881a891fa05cd1c4caa8cc10451359db163f4
SH256 hash:
681382f3134de5c6272a49dd13651c8c201b89c247b471191496e7335702fa59
MD5 hash:
2ae993a2ffec0c137eb51c8832691bcb
SHA1 hash:
98e0b37b7c14890f8a599f35678af5e9435906e1
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.79
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_SliverFox_String |
|---|---|
| Author: | huoji |
| Description: | Detect files is `SliverFox` malware |
| Rule name: | FreddyBearDropper |
|---|---|
| Author: | Dwarozh Hoshiar |
| Description: | Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip. |
| Rule name: | Ins_NSIS_Buer_Nov_2020_1 |
|---|---|
| Author: | Arkbird_SOLG |
| Description: | Detect NSIS installer used for Buer loader |
| 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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