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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 a81b33a91030687c84dbf040e69e3e47a144b2f5b046a37444bbbd4fc0d70877. 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: 10


Intelligence 10 IOCs YARA 2 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: a81b33a91030687c84dbf040e69e3e47a144b2f5b046a37444bbbd4fc0d70877
SHA3-384 hash: 05d2157f3c15e1e14820bfda1ac15e149ac9c920ded710be29581c5aa000e733416a11c0f1b29333d1be9b91185d45e9
SHA1 hash: 1b53fd2a4e9040eddfd026ac42388c0c34a5799e
MD5 hash: e048911b85fe85c4094aca3f245c0e66
humanhash: butter-video-march-ink
File name:2025-09-03-0803.tar
Download: download sample
Signature GuLoader
Create hunting rule
File size:19'481 bytes
First seen:2026-05-20 18:04:17 UTC
Last seen:Never
File type: tar
MIME type:application/x-rar
ssdeep 384:izDXJzbEALn51aiJY0NKluieVVRiylBgIpENhH:izDXNAAb5AiJlUluievosdEfH
TLSH T1D192D0FCC065910A19D8AB1B682A008E6877AD77F34443851369BE81F7EE3C5ABDD0DD
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 tar

Intelligence

File Origin
# of uploads :
1
# of downloads :
19
Origin country :
CH CH
File Archive Information

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

File name:2025-09-03-0803.js
File size:35'306 bytes
SHA256 hash: 18386a8b8abb8bafc43132c737af5d5e7d688aafe72d6cc37c76ce05634ed22c
MD5 hash: ca20e92955c3fe4de3cdd3577768e89f
MIME type:text/plain
Signature GuLoader
Vendor Threat Intelligence
Details
Link:
https://research.acce.ciphertechsolutions.com/results/8fbe14e5-d490-4fbf-8b01-661a688a3784/
Detection(s):
Sanesecurity.Foxhole.JS_Rar_1.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Script.SNH-gen.57596358.UNOFFICIAL
Create hunting rule

Sanesecurity.Malware.26863.JsHeur.UNOFFICIAL
Create hunting rule

SecuriteInfo.com.Suspicious-Rar-JS.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
95.7%
Link:
https://cyber-fortress.com/docs/result/index.php?id=6a0e116c4f2b29ce040216c5
Tags:
agenttesla infosteal
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
repaired
Link:
https://www.filescan.io/uploads/6a0dfea3861ee596e641bfdd/reports/bcb3ff19-44f2-4333-8bf0-ceae3754f357/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/a81b33a91030687c84dbf040e69e3e47a144b2f5b046a37444bbbd4fc0d70877
Verdict:
Malicious
File Type:
rar
First seen:
2025-09-17T18:55:00Z UTC
Last seen:
2026-05-20T20:06:00Z UTC
Hits:
~100
Link:
https://opentip.kaspersky.com/a81b33a91030687c84dbf040e69e3e47a144b2f5b046a37444bbbd4fc0d70877/results?tab=lookup
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/a81b33a91030687c84dbf040e69e3e47a144b2f5b046a37444bbbd4fc0d70877/
Verdict:
Malicious
Threat:
Family.AGENTTESLA
Link:
https://tip.neiki.dev/file/a81b33a91030687c84dbf040e69e3e47a144b2f5b046a37444bbbd4fc0d70877
Threat name:
Win32.Trojan.Acll
Create hunting rule
Status:
Malicious
First seen:
2025-09-03 14:23:32 UTC
File Type:
Binary (Archive)
Extracted files:
1
AV detection:
13 of 24 (54.17%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=vanthkiqgbuhzbg36baonhr6i6qujmxvwbdkg5cexo6u7qgxbb3q._file
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.82
Link:
https://yomi.yoroi.company/submissions/a81b33a91030687c84dbf040e69e3e47a144b2f5b046a37444bbbd4fc0d70877

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:Cerberus
Create hunting rule
Author:Jean-Philippe Teissier / @Jipe_
Description:Cerberus
Rule name:Sus_CMD_Powershell_Usage
Create hunting rule
Author:XiAnzheng
Description:May Contain(Obfuscated or no) Powershell or CMD Command that can be abused by threat actor(can create FP)

File information

The table below shows additional information about this malware sample such as delivery method and external references.

Malspam

GuLoader

tar a81b33a91030687c84dbf040e69e3e47a144b2f5b046a37444bbbd4fc0d70877

(this sample)

  
Delivery method
Distributed via e-mail attachment

Comments