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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032. 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: 12


Intelligence 12 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032
SHA3-384 hash: 9284502c41fc7996e9bf1809097b425cc1054b75d11f25dd6d9b282dae0adfced1e1ede1d630e1a054dc6db0b40b520f
SHA1 hash: cd787161b0537aa2b010c5daee2b7951b52d8a3e
MD5 hash: 857200529728d0e5612ca8c60e0b8b09
humanhash: seven-shade-oranges-virginia
File name:8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032
Download: download sample
Signature GuLoader
Create hunting rule
File size:273'400 bytes
First seen:2026-05-08 12:26:07 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash 7eae418c7423834ffc3d79b4300bd6fb (66 x GuLoader, 23 x RemcosRAT, 21 x AgentTesla)
ssdeep 6144:JlHXelTPyoK48h+29eMuSB5aj1EUd3xBBcv7ncdqz1:mlTihvHfij1EUd3xBBcLTp
Threatray 2'386 similar samples on MalwareBazaar
TLSH T144441211A340E487DBB55730983AD7B71FEAED204159BF4713E27F2E3C612E0A82E55A
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:Overling
Issuer:Overling
Algorithm:sha256WithRSAEncryption
Valid from:2026-02-28T05:21:37Z
Valid to:2027-02-28T05:21:37Z
Serial number: 3deceacfca05864b63616b5ccaaaa1067e9d37d9
Thumbprint Algorithm:SHA256
Thumbprint: 4799de0b3b02e376d3f7720d026f4d5ba76f54062a3d0aefd04ec7593e8397ee
Source:This information was brought to you by ReversingLabs A1000 Malware Analysis Platform

Intelligence

File Origin
# of uploads :
1
# of downloads :
101
Origin country :
HU HU
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/61ccffac-abbb-46f9-9436-2ad285209b82/
Malware family:
n/a
ID:
1
File name:
exe
Verdict:
Malicious activity
Analysis date:
2026-05-08 13:47:56 UTC
Tags:
n/a
Link:
https://app.any.run/tasks/4673b6a8-cbf1-4240-9429-63ca3a892b21

Note:
ANY.RUN is an interactive sandbox that analyzes all user actions rather than an uploaded sample
Detection:
Guloader
Create hunting rule
Link:
https://www.capesandbox.com/analysis/64978/
Gathering data
Result
Verdict:
Clean
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
Unauthorized injection to a recently created process
Restart of the analyzed sample
Sending a custom TCP request
DNS request
Connection attempt
Sending an HTTP GET request
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug base64 installer installer installer-heuristic microsoft_visual_cc nsis signed soft-404
Link:
https://www.filescan.io/uploads/69fdd6d92fcb905ec288632e/reports/a665bacd-4fd0-4981-81f9-f37c4edacd33/overview
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032
Verdict:
Malicious
File Type:
exe x32
First seen:
2026-03-31T02:04:00Z UTC
Last seen:
2026-05-05T02:43:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032/results?tab=lookup
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/a3530376-e6a9-4bd9-9458-6e28f8531e21
Score:
93%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032/
Threat name:
Win32.Trojan.Ravartar
Create hunting rule
Status:
Malicious
First seen:
2026-03-31 08:12:46 UTC
File Type:
PE (Exe)
Extracted files:
10
AV detection:
21 of 36 (58.33%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=r6rxa5ngp7zmaskf7o2ounops77thp7wqzsujbavij2qry3lmaza._file
Verdict:
malicious
Label(s):
cloudeye
Create hunting rule
Similar samples:
30829f3086c52d01a07501ea2ef51c0c94ae8045777e117feb7b41cb0743c421
GuLoader
48caa1c5b9a6b41f64e6f01f74a6ed1623459c064235f772d832153274944fe2
GuLoader
551863be2e92aa2d319a92cda72bc2123233ee3a7e965ee691fd70d88c21d772
GuLoader
60d7ecfa5459d57946bad25c71577ddff454bde012fd802d340830a6a6a4d94f
GuLoader
67fd31f9b85ca5e31e0851c8a5f8f2f36343d884aa3dd7f26d4aa6c5d02b28fe
GuLoader
803d4ec06466ca32c6f4e2dd79d42d8b6b33b858d393f59f3cce2794981d41f8
GuLoader
841bd3307cb1a34c5f6a907217bd09c5e4d9e7500e2863a8cd956793014d5f2e
GuLoader
dd6d8363c2761f77948a54be192dbbe563d2da9dd8f922102547631ccbd05ebb
GuLoader
eadedc1029829676460e4a64eabd39a11f3753767c000d48cc55a584a5e5a143
GuLoader
error
GuLoader
+ 2'376 additional samples on MalwareBazaar
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader
Link:
https://tria.ge/reports/260508-pndbescw6p/
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:
8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032
MD5 hash:
857200529728d0e5612ca8c60e0b8b09
SHA1 hash:
cd787161b0537aa2b010c5daee2b7951b52d8a3e
Link:
https://www.unpac.me/results/7e09173c-7335-407d-9247-4c6ed9e53490/
SH256 hash:
6950991102462d84fdc0e3b0ae30c95af8c192f77ce3d78e8d54e6b22f7c09ba
MD5 hash:
8cf2ac271d7679b1d68eefc1ae0c5618
SHA1 hash:
7cc1caaa747ee16dc894a600a4256f64fa65a9b8
Link:
https://www.unpac.me/results/7e09173c-7335-407d-9247-4c6ed9e53490/
SH256 hash:
c5ba017732597a82f695b084d1aa7fe3b356168cc66105b9392a9c5b06be5188
MD5 hash:
ec9640b70e07141febbe2cd4cc42510f
SHA1 hash:
64a5e4b90e5fe62aa40e7ac9e16342ed066f0306
Link:
https://www.unpac.me/results/7e09173c-7335-407d-9247-4c6ed9e53490/
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.52
Link:
https://yomi.yoroi.company/submissions/8fa37075a67ff2c04945fbb4ea35cf97ff33bff68665448415427508e36b6032

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:PE_Digital_Certificate
Create hunting rule
Author:albertzsigovits
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/64978/

Comments