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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b66a49ead08b602bc6fb3d6d1697f402c015e91fc9b8233ad445c8ee5726a9e3. 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: 8


Intelligence 8 IOCs YARA 3 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b66a49ead08b602bc6fb3d6d1697f402c015e91fc9b8233ad445c8ee5726a9e3
SHA3-384 hash: 79769c6c4471390c1b2952a59066a3984d8dc524311a60e8b0ef77247513f98d1a62c1fac34925e943df92aa08187724
SHA1 hash: 196ea63d52a412fd38e69488f03ad95220116bf8
MD5 hash: b86fb9e7751f17083eae41d746209d7f
humanhash: kansas-bravo-football-mirror
File name:Request_for_Quotation_MK_FMHS_RFQ250228_Pdf.r00.rar
Download: download sample
Signature GuLoader
Create hunting rule
File size:689'446 bytes
First seen:2026-05-20 18:08:37 UTC
Last seen:Never
File type: rar
MIME type:application/x-rar
ssdeep 12288:G7IuFnUlOw/JIcVvNRd/V8JP//jFUAbKfNoPqyCf:yIuFnUlfyeq//jOKKleqyy
TLSH T101E42322C2790A3BA5D702549943CDAA8F621D0F2028BD6C0962CDF59D7DC79D2CBAC7
TrID 61.5% (.RAR) RAR compressed archive (v5.0) (8000/1)
38.4% (.RAR) RAR compressed archive (gen) (5000/1)
Magika rar
Reporter TomU
Tags:GuLoader rar

Intelligence

File Origin
# of uploads :
1
# of downloads :
24
Origin country :
CH CH
File Archive Information

This file archive contains 1 file(s), sorted by their relevance:

File name:Request for Quotation MK FMHS RFQ250228.exe
File size:736'888 bytes
SHA256 hash: b6baf782b24cfe8e36dd991d971daef66c281d9c427bb99d37ae3a5014df89c4
MD5 hash: f11a33a1a5b0fc1e6214a0986d601e49
MIME type:application/x-dosexec
Signature GuLoader
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/127811a3-59da-4a42-9541-d546f9180887/
Detection(s):
Sanesecurity.Foxhole.Rar_fs1620.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
96.5%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a0e13f44f2b29ce04021ae4
Tags:
injection obfusc virus
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
adaptive-context anti-debug evasive expired-cert installer installer installer-heuristic microsoft_visual_cc nsis reconnaissance signed
Link:
https://www.filescan.io/uploads/6a0dffe8861ee596e641c20f/reports/ad2cd01f-78cb-46b4-ad2d-3cd95903aac8/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/b66a49ead08b602bc6fb3d6d1697f402c015e91fc9b8233ad445c8ee5726a9e3
Verdict:
Malicious
File Type:
rar
First seen:
2025-02-27T22:41:00Z UTC
Last seen:
2026-03-18T01:00:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/b66a49ead08b602bc6fb3d6d1697f402c015e91fc9b8233ad445c8ee5726a9e3/results?tab=lookup
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b66a49ead08b602bc6fb3d6d1697f402c015e91fc9b8233ad445c8ee5726a9e3/
Threat name:
Win32.Trojan.GuLoader
Create hunting rule
Status:
Malicious
First seen:
2025-02-28 00:31:02 UTC
File Type:
Binary (Archive)
Extracted files:
18
AV detection:
21 of 38 (55.26%)
Threat level:
  5/5
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
1.00
Link:
https://yomi.yoroi.company/submissions/b66a49ead08b602bc6fb3d6d1697f402c015e91fc9b8233ad445c8ee5726a9e3

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.

Malspam

GuLoader

rar b66a49ead08b602bc6fb3d6d1697f402c015e91fc9b8233ad445c8ee5726a9e3

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments