MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 346ffb8757558acb94bcdf09ae4f3b10f8397d165fcac4076cd41ff59c5a586d. 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


KoiLoader


Vendor detections: 10


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

SHA256 hash: 346ffb8757558acb94bcdf09ae4f3b10f8397d165fcac4076cd41ff59c5a586d
SHA3-384 hash: 41d0cec4ea019e911b1e2761e8a55ea223720b7470f599ed6714adf851ebca816bb3ec831cc2ff053319108d3ea49050
SHA1 hash: 8c2fafd26c3efa056f597bbdacedf6aa061bc2ab
MD5 hash: 289d57cff1a52477b6e2289f0615a348
humanhash: indigo-don-yankee-october
File name:debug2.ps1
Download: download sample
Signature KoiLoader
Create hunting rule
File size:327'162 bytes
First seen:2025-08-15 15:32:55 UTC
Last seen:Never
File type:PowerShell (PS) ps1
MIME type:text/plain
ssdeep 6144:pI7DiFdy/3oO5aSONsgmLxrTxW0kM4Nm19vgBi1AaFn9k7wt8dNVE3EJUucd3b8I:pmO6achTxKBy/U2kQzYwubW
TLSH T1EA6497DB636A3CAA4D47377CD7926A83AF8A14B0017250DFFDED5929F0DB13980B0529
Magika powershell
Reporter abuse_ch
Tags:KoiLoader ps1

Intelligence

File Origin
# of uploads :
1
# of downloads :
39
Origin country :
SE SE
Vendor Threat Intelligence
Detection(s):
SecuriteInfo.com.PUA.Powershell.Downloader-5.UNOFFICIAL
Create hunting rule

Verdict:
Malicious
Score:
81.4%
Link:
https://cyber-fortress.com/docs/result/index.php?id=689f5360c2f5296a1a273768
Tags:
virus spawn hype
Verdict:
Suspicious
Threat level:
  5/10
Confidence:
100%
Link:
https://www.filescan.io/uploads/689f5354a4bdac9f5b98a7ce/reports/afed0242-8b9c-4449-9ed2-fc8d9d721849/overview
Verdict:
Malicious
Labled as:
Trojan.Generic
Link:
https://www.hybrid-analysis.com/sample/346ffb8757558acb94bcdf09ae4f3b10f8397d165fcac4076cd41ff59c5a586d
Result
Threat name:
KoiLoader
Create hunting rule
Detection:
malicious
Classification:
troj.evad
Score:
84 / 100
Link:
https://www.joesandbox.com/analysis/1758019
Signature
AI detected malicious Powershell script
Found suspicious powershell code related to unpacking or dynamic code loading
Joe Sandbox ML detected suspicious sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected KoiLoader
Behaviour
Behavior Graph:
Download SVG
Score:
97%
Verdict:
Malware
File Type:
SCRIPT
Link:
https://malprob.io/report/346ffb8757558acb94bcdf09ae4f3b10f8397d165fcac4076cd41ff59c5a586d
Gathering data
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/346ffb8757558acb94bcdf09ae4f3b10f8397d165fcac4076cd41ff59c5a586d/
Verdict:
Malicious
Threat:
HEUR:Trojan.PowerShell
Link:
https://tip.neiki.dev/file/346ffb8757558acb94bcdf09ae4f3b10f8397d165fcac4076cd41ff59c5a586d
Threat name:
Script-PowerShell.Trojan.KoiLoader
Create hunting rule
Status:
Malicious
First seen:
2023-07-03 17:14:00 UTC
File Type:
Text (PowerShell)
AV detection:
11 of 38 (28.95%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=grx7xb2xkwfmxff434e24tz3cd4ds7iwl7fmib3m2qp7lhc2lbwq._file
Result
Malware family:
n/a
Score:
  8/10
Tags:
defense_evasion execution
Link:
https://tria.ge/reports/250815-szg1jaylt2/
Behaviour
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Command and Scripting Interpreter: PowerShell
Blocklisted process makes network request
Modifies trusted root certificate store through registry
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Malicious File
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/346ffb8757558acb94bcdf09ae4f3b10f8397d165fcac4076cd41ff59c5a586d

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_PowerShell_Obfuscation
Create hunting rule
Author:daniyyell
Description:Detects obfuscated PowerShell commands commonly used in malicious scripts.
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.

Web download

KoiLoader

PowerShell (PS) ps1 346ffb8757558acb94bcdf09ae4f3b10f8397d165fcac4076cd41ff59c5a586d

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3331649/
  
Delivery method
Distributed via web download

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