MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8. 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: 966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8
SHA3-384 hash: f832d51436aa8fcf9373d5acec4462119c12ea87d7d5aaaa6c7c63c2a06ccdef5b009821d929e63eaa974d3a2e1cc3d6
SHA1 hash: cbb6d10da7a3472e95ea8854f09d5fe832840dc5
MD5 hash: 426fb6580906af3870fe263a41c8d217
humanhash: cola-idaho-purple-robin
File name:Purchase_Order_Sheet_Confirmation_Required_Quotation_Request_TradeKey_pdf.exe
Download: download sample
Signature GuLoader
Create hunting rule
File size:974'424 bytes
First seen:2026-03-17 11:59:27 UTC
Last seen:Never
File type:Executable exe
MIME type:application/x-dosexec
imphash b78ecf47c0a3e24a6f4af114e2d1f5de (304 x GuLoader, 23 x Formbook, 21 x RemcosRAT)
ssdeep 24576:sGlINfUAk94qpeqHkZ7Oi1d5Hfno+Sa7NirYyu:CNfUASNpLHkZSiVo9mNb
TLSH T1CC25231253E0C54EFAA0A33A50FA6BBD2973CF146222B32323547E5BEA71713931D795
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
Reporter lowmal3
Tags:exe GuLoader

Intelligence

File Origin
# of uploads :
1
# of downloads :
162
Origin country :
DE DE
Vendor Threat Intelligence
Malware configuration found for:
NSIS
Details
Link:
https://research.acce.ciphertechsolutions.com/results/8f219897-7641-41ae-b346-423f57813a12/
Malware family:
guloader
Create hunting rule
ID:
1
File name:
Purchase_Order_Sheet_Confirmation_Required_Quotation_Request_TradeKey_pdf.exe
Verdict:
Malicious activity
Analysis date:
2026-03-17 12:00:43 UTC
Tags:
guloader
Link:
https://app.any.run/tasks/c989d7f7-c8cd-4631-ae36-d0b22b8d6d88

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/57719/
Verdict:
Malicious
Score:
70%
Link:
https://cyber-fortress.com/docs/result/index.php?id=69b9426188c80c01586b1ba6
Tags:
underscore injection obfusc crypt
Result
Verdict:
Clean
Maliciousness:

Behaviour
Creating a file in the %temp% subdirectories
Creating a file
Delayed reading of the file
Gathering data
Verdict:
Unknown
Link:
https://www.hybrid-analysis.com/sample/966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8
Verdict:
Malicious
File Type:
exe x32
Detections:
Trojan.NSIS.Makoob.sbc Trojan.NSIS.Makoob.sba HEUR:Trojan-Downloader.Win32.Minix.gen Trojan-Downloader.Win32.Minix.sb Trojan.Win32.Guloader.sb
Link:
https://opentip.kaspersky.com/966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8/results?tab=lookup
Verdict:
Suspicious
Link:
https://analyze.intezer.com/analyses/e5c521c3-c0f1-4bd0-9779-e5c9eb491b93
Result
Threat name:
GuLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
68 / 100
Link:
https://www.joesandbox.com/analysis/1884832
Signature
AI detected suspicious PE digital signature
Initial sample is a PE file and has a suspicious name
Multi AV Scanner detection for submitted file
Tries to detect virtualization through RDTSC time measurements
Yara detected GuLoader
Behaviour
Behavior Graph:
Download SVG
Score:
96%
Verdict:
Malware
File Type:
PE
Link:
https://malprob.io/report/966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8
Verdict:
inconclusive
YARA:
5 match(es)
Tags:
Executable NSIS Installer PE (Portable Executable) PE File Layout Win 32 Exe x86
Link:
https://app.malva.re/file/426fb6580906af3870fe263a41c8d217
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8/
Verdict:
Malicious
Threat:
Family.GULOADER
Link:
https://tip.neiki.dev/file/966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=szvihoj23pv6jlyir4jzlizbjureecrma7t2jntfo3n2hxcgqlea._file
Result
Malware family:
guloader
Create hunting rule
Score:
  10/10
Tags:
family:guloader discovery downloader installer
Link:
https://tria.ge/reports/260317-n6h4ysas7r/
Behaviour
Enumerates physical storage devices
System Location Discovery: System Language Discovery
Drops file in Windows directory
Loads dropped DLL
Guloader family
Guloader,Cloudeye
Unpacked files
SH256 hash:
966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8
MD5 hash:
426fb6580906af3870fe263a41c8d217
SHA1 hash:
cbb6d10da7a3472e95ea8854f09d5fe832840dc5
Link:
https://www.unpac.me/results/818eb460-746a-45d9-9a85-58abe771192d/
SH256 hash:
681382f3134de5c6272a49dd13651c8c201b89c247b471191496e7335702fa59
MD5 hash:
2ae993a2ffec0c137eb51c8832691bcb
SHA1 hash:
98e0b37b7c14890f8a599f35678af5e9435906e1
Link:
https://www.unpac.me/results/818eb460-746a-45d9-9a85-58abe771192d/
SH256 hash:
cb958e21c3935ef7697a2f14d64cae0f9264c91a92d2deeb821ba58852dac911
MD5 hash:
13b6a88cf284d0f45619e76191e2b995
SHA1 hash:
09ebb0eb4b1dca73d354368414906fc5ad667e06
Link:
https://www.unpac.me/results/818eb460-746a-45d9-9a85-58abe771192d/
Malware family:
GuLoader
Create hunting rule
Verdict:
Malicious
Link:
https://www.vmray.com/analyses/_mb/966a83b93adb/report/overview.html
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/966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8

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
Create hunting rule
Author:huoji
Description:Detect files is `SliverFox` malware
Rule name:FreddyBearDropper
Create hunting rule
Author:Dwarozh Hoshiar
Description:Freddy Bear Dropper is dropping a malware through base63 encoded powershell scrip.
Rule name:Ins_NSIS_Buer_Nov_2020_1
Create hunting rule
Author:Arkbird_SOLG
Description:Detect NSIS installer used for Buer loader
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.

Malspam

GuLoader

Executable exe 966a83b93adbebe4af088f1395a3214d22420a2c07e7a4b66576dba3dc4682c8

(this sample)

  
Delivery method
Distributed via e-mail attachment
Cape
Cape
https://www.capesandbox.com/analysis/57719/

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