MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f28609e7a34618adf7487d8b257637faa648982774fbc81f31bdc71efaa608c3. 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

Gafgyt

Vendor detections: 9

Intelligence 9 IOCs YARA 5 File information Comments

SHA256 hash:	f28609e7a34618adf7487d8b257637faa648982774fbc81f31bdc71efaa608c3
SHA3-384 hash:	d128db90fcaeff9e8a42240d938319f8dfa9f9e05f3687132dd7639dd53c36af57e5e77c67d039bff93cf239ec686e2c
SHA1 hash:	f2036a00a0a1daf96273b414ba774e7df5f333f1
MD5 hash:	ca9a5c1c8c5f4154a63760053e481703
humanhash:	skylark-sweet-arkansas-seven
File name:	x86_64
Download:	download sample
Signature	Gafgyt Create hunting rule
File size:	54'928 bytes
First seen:	2026-09-22 04:55:19 UTC
Last seen:	2026-09-22 10:35:48 UTC
File type:	elf
MIME type:	application/x-executable
ssdeep	768:AM8n/JyhSkyVI8YgUhQpqPd0MiZY1ywtX5kr2DSjigHRbkNesokvfcnTapc4n:Ajn/JaSfTmQk6MitwterbikoNekuS9
TLSH	T1FA33F1BF156FE634D2A24EBDF9A14BDCB635F32184264B37454C68FABD094122B35E20
TrID	50.1% (.) ELF Executable and Linkable format (Linux) (4022/12) 49.8% (.O) ELF Executable and Linkable format (generic) (4000/1)
Magika	elf
Reporter	abuse_ch
Tags:	elf gafgyt UPX

UPX packed

This file is packed with UPX. We have therefore unpacked the file. Below is furhter information about the unpacked (de-compressed) file.

File size (compressed) :	54'928 bytes
File size (de-compressed) :	116'728 bytes
Format:	linux/amd64
Unpacked file:	a1baca3a9b387aa478edeed198bd6263fdc60c6850281c4da8836915cc4fc404

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Details

Link:

https://research.acce.ciphertechsolutions.com/results/8e837e70-3b0e-487b-a6dd-36cd00d7bb6c/

Detection(s):

SecuriteInfo.com.Linux.Mirai.10757.28568.8600.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file

Creates or modifies symbolic links

Opens a port

Launching a process

Sets a written file as executable

Sends data to a server

Runs as daemon

Kills processes

Changes access rights for a written file

Connection attempt

Receives data from a server

Changes the time when the file was created, accessed, or modified

Creates or modifies files in /cron to set up autorun

Writes files to system subdirectory

Writes files to system directory

Performs a bruteforce attack in the network

Creates or modifies files to set up autorun

Deleting of the original file

Creates or modifies files in /init.d to set up autorun

Creates or modifies symbolic links in /init.d to set up autorun

Verdict:

Unknown

Threat level:

2.5/10

Confidence:

100%

Tags:

packed upx

Link:

https://www.filescan.io/uploads/6ab20a6eac7d3eacb2fb2aab/reports/67032db9-7ce7-4635-a294-e50b85f4d04d/overview

Verdict:

Malicious

Uses P2P?:

false

Uses anti-vm?:

false

Architecture:

x86

Packer:

UPX

Botnet:

unknown

Number of open files:

Number of processes launched:

Processes remaning?

false

Remote TCP ports scanned:

Full report:

https://elfdigest.com/brief/f28609e7a34618adf7487d8b257637faa648982774fbc81f31bdc71efaa608c3

Behaviour

Persistence

Botnet C2s

TCP botnet C2(s):

not identified

UDP botnet C2(s):

not identified

Verdict:

Malicious

File Type:

elf.64.le

First seen:

2026-09-22T02:32:00Z UTC

Last seen:

2026-09-22T03:03:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/f28609e7a34618adf7487d8b257637faa648982774fbc81f31bdc71efaa608c3/results?tab=lookup

Status:

terminated

Link:

https://sandbox.kunai.rocks/analysis/ac9a7faf-ff74-424d-b383-7e948cafae03

Behavior Graph:

Download SVG

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/5c924ce3-87df-4608-ac40-6456928e2506

Result

Threat name:

Gafgyt, Mirai

Detection:

malicious

Classification:

spre.troj.evad

Score:

100 / 100

Link:

https://www.joesandbox.com/analysis/1975949

Signature

Drops files in suspicious directories

Executes the "crontab" command typically for achieving persistence

Found malware configuration

Malicious sample detected (through community Yara rule)

Modifies the '.bashrc' or '.bash_profile' file typically for persisting actions

Multi AV Scanner detection for submitted file

Protects files from modification

Sample deletes itself

Sample is packed with UPX

Sample reads /proc/mounts (often used for finding a writable filesystem)

Sample tries to persist itself using .desktop files

Sample tries to persist itself using /etc/profile

Sample tries to persist itself using cron

Sample tries to persist itself using System V runlevels

Sample tries to set files in /etc globally writable

Writes identical ELF files to multiple locations

Yara detected Gafgyt

Yara detected Mirai

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

ELF

Link:

https://malprob.io/report/f28609e7a34618adf7487d8b257637faa648982774fbc81f31bdc71efaa608c3

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/f28609e7a34618adf7487d8b257637faa648982774fbc81f31bdc71efaa608c3/

Threat name:

Linux.Backdoor.Gafgyt

Status:

Malicious

First seen:

2026-09-22 04:56:27 UTC

File Type:

ELF64 Little (Exe)

AV detection:

16 of 38 (42.11%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=6kdatz5diymk352ipwfsk5rx7ktergbhot54qhzrxxdr56vgbdbq._file

Result

Malware family:

n/a

Score:

9/10

Tags:

defense_evasion discovery execution linux persistence privilege_escalation upx

Link:

https://tria.ge/reports/260922-fksr9sgb58/

Behaviour

Reads runtime system information

System Network Configuration Discovery

Creates a desktop entry file

Modifies Bash startup script

UPX packed file

Creates/modifies Cron job

Creates/modifies environment variables

Modifies init.d

Modifies rc script

Modifies systemd

Deletes itself

Modifies Watchdog functionality

Modifies the /etc/hosts DNS resolution file

Contacts a large (13438) amount of remote hosts

Creates a large amount of network flows

Please note that we are no longer able to provide a coverage score for Virus Total.

Threat name:

Legit

Score:

0.20

Link:

https://yomi.yoroi.company/submissions/f28609e7a34618adf7487d8b257637faa648982774fbc81f31bdc71efaa608c3

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:	ELF_IoT_DVR_Botnet_Hama_UPX Create hunting rule
Author:	Serhii Kocherhan
Description:	Detects packed and unpacked ELF IoT/DVR botnet variants targeting UPX compression structures and uncompressed code

Rule name:	linux_generic_ipv6_catcher Create hunting rule
Author:	@_lubiedo
Description:	ELF samples using IPv6 addresses

Rule name:	SUSP_ELF_LNX_UPX_Compressed_File Create hunting rule
Author:	Florian Roth (Nextron Systems)
Description:	Detects a suspicious ELF binary with UPX compression
Reference:	Internal Research

Rule name:	TH_Generic_MassHunt_Linux_Malware_2026_CYFARE Create hunting rule
Author:	CYFARE
Description:	Generic Linux malware mass-hunt rule - 2026
Reference:	https://cyfare.net/