MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 81606738d41bc5e1f14da69c7e1b631b003717caaf7f9632d51f3ad2f5e2a285. 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

CatStorm

Vendor detections: 7

Intelligence 7 IOCs YARA 26 File information Comments

SHA256 hash:	81606738d41bc5e1f14da69c7e1b631b003717caaf7f9632d51f3ad2f5e2a285
SHA3-384 hash:	e7366aba8df2b2b208b7013c6dd307dc346b5400795229ab1e269dfb4c2024b18f0dd4e57b32160a6f740362277dabd3
SHA1 hash:	89864b889b7276c68bb7c499100c5156d7715ab6
MD5 hash:	dc33e76712e4c823d25bfdd8aa3e96c4
humanhash:	golf-nine-north-batman
File name:	mipsel
Download:	download sample
Signature	CatStorm Create hunting rule
File size:	6'619'351 bytes
First seen:	2026-10-22 21:55:04 UTC
Last seen:	Never
File type:	elf
MIME type:	application/x-executable
ssdeep	49152:MLYuISU82uY9FR4iPQdiGRAPjBU3IuWt9dxaU+5Es:zfPQhfWjFUEs
TLSH	T18466F815AD842BEAC46C4F7544FAC95A23B05D140AF14A7A66A4FFEDBC722347F0788C
gimphash	e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
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:	CatStorm elf

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

No detections

Detection(s):

SecuriteInfo.com.Linux.Flooder-5.UNOFFICIAL

Result

Verdict:

Malware

Maliciousness:

Behaviour

Creating a file in the %temp% directory

Connection attempt

Creating a process from a recently created file

Creating a file

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

Manages services

Changes access rights for a written file

Launching a process

Deleting a recently created file

Creates or modifies files in /cron to set up autorun

Writes files to system subdirectory

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

Verdict:

Unknown

Threat level:

0/10

Confidence:

100%

Tags:

crypto golang reconnaissance

Link:

https://www.filescan.io/uploads/6ada864bee3479f50b2209bf/reports/b0878b60-98f5-43df-9d33-111f3faebfea/overview

Verdict:

Malicious

File Type:

elf.32.le

First seen:

2026-10-22T20:18:00Z UTC

Last seen:

2026-10-23T09:50:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/81606738d41bc5e1f14da69c7e1b631b003717caaf7f9632d51f3ad2f5e2a285/results?tab=lookup

Status:

terminated

Link:

https://sandbox.kunai.rocks/analysis/8d4d3788-f3c4-47b4-8f8e-1c982ff3243d

Behavior Graph:

Download SVG

Verdict:

Unknown

Link:

https://analyze.intezer.com/analyses/9675ca2d-7c50-4bd6-a47b-247bccd6a871

Result

Threat name:

CatStorm

Detection:

malicious

Classification:

troj.mine

Score:

60 / 100

Link:

https://www.joesandbox.com/analysis/1990783

Signature

Found strings related to Crypto-Mining

Multi AV Scanner detection for submitted file

Yara detected CatStorm

Behaviour

Behavior Graph:

Download SVG

Score:

100%

Verdict:

Malware

File Type:

ELF

Link:

https://malprob.io/report/81606738d41bc5e1f14da69c7e1b631b003717caaf7f9632d51f3ad2f5e2a285

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/81606738d41bc5e1f14da69c7e1b631b003717caaf7f9632d51f3ad2f5e2a285/

Threat name:

Linux.Coinminer.XMRig

Status:

Malicious

First seen:

2026-10-22 21:55:32 UTC

File Type:

ELF32 Little (Exe)

AV detection:

15 of 38 (39.47%)

Threat level:

4/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=qfqgoogudpc6d4knu2oh4g3ddmadof6kv57zmmwvd45nf5pcukcq._file

Result

Malware family:

n/a

Score:

6/10

Tags:

discovery execution persistence privilege_escalation

Link:

https://tria.ge/reports/261022-1syzgaas8n/

Behaviour

Enumerates kernel/hardware configuration

Reads runtime system information

System Network Configuration Discovery

Writes file to tmp directory

Creates/modifies Cron job

Modifies init.d

Modifies systemd

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

Threat name:

Suspicious File

Score:

0.30

Link:

https://yomi.yoroi.company/submissions/81606738d41bc5e1f14da69c7e1b631b003717caaf7f9632d51f3ad2f5e2a285

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:	APT_Bitter_ZxxZ_Downloader Create hunting rule
Author:	SECUINFRA Falcon Team (@SI_FalconTeam)
Description:	Detects Bitter (T-APT-17) ZxxZ Downloader
Reference:	https://www.secuinfra.com/en/techtalk/whatever-floats-your-boat-bitter-apt-continues-to-target-bangladesh

Rule name:	CP_Script_Inject_Detector Create hunting rule
Author:	DiegoAnalytics
Description:	Detects attempts to inject code into another process across PE, ELF, Mach-O binaries

Rule name:	DetectEncryptedVariants Create hunting rule
Author:	Zinyth
Description:	Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded

Rule name:	DetectGoMethodSignatures Create hunting rule
Author:	Wyatt Tauber
Description:	Detects Go method signatures in unpacked Go binaries

Rule name:	Detect_Go_GOMAXPROCS Create hunting rule
Author:	Obscurity Labs LLC
Description:	Detects Go binaries by the presence of runtime.GOMAXPROCS in the runtime metadata

Rule name:	enterpriseapps2 Create hunting rule
Author:	Tim Brown @timb_machine
Description:	Enterprise apps

Rule name:	F01_s1ckrule Create hunting rule
Author:	s1ckb017

Rule name:	GoBinTest Create hunting rule

Rule name:	golang Create hunting rule

Rule name:	golang_binary_string Create hunting rule
Description:	Golang strings present

Rule name:	Golang_Find_CSC846 Create hunting rule
Author:	Ashar Siddiqui
Description:	Find Go Signatuers

Rule name:	Golang_Find_CSC846_Simple Create hunting rule
Author:	Ashar Siddiqui
Description:	Find Go Signatuers

Rule name:	identity_golang Create hunting rule
Author:	Eric Yocam
Description:	find Golang malware

Rule name:	JP_Lure_Content_Hunt Create hunting rule
Author:	sumeshi
Description:	Hunts for files containing Japanese kana text or common Japanese lure terminology

Rule name:	MIRAI_TELNETCURL_payload Create hunting rule
Author:	AfterPacket
Description:	Mirai-lineage ELF payload carrying the leaked-source decoy domain
Reference:	https://github.com/Afterpacket/drosera-threat-intel

Rule name:	NSVPS_Hydra_SSH_Bruteforce Create hunting rule
Author:	sanad (NSVPS-SOC)
Description:	Hydra SSH brute-force campaign credentials pattern from NSVPS honeypot

Rule name:	ProgramLanguage_Golang Create hunting rule
Author:	albertzsigovits
Description:	Application written in Golang programming language

Rule name:	RANSOMWARE Create hunting rule
Author:	ToroGuitar

Rule name:	setsockopt Create hunting rule
Author:	Tim Brown @timb_machine
Description:	Hunts for setsockopt() red flags

Rule name:	SHA512_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA384/SHA512 constants

Rule name:	Suspicious_Golang_Binary Create hunting rule
Author:	Tim Machac
Description:	Triage: Golang-compiled binary with suspicious OS/persistence/network strings (not family-specific)

Rule name:	telebot_framework Create hunting rule
Author:	vietdx.mb

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/

Rule name:	unixredflags3 Create hunting rule
Author:	Tim Brown @timb_machine
Description:	Hunts for UNIX red flags

Rule name:	vmdetect Create hunting rule
Author:	nex
Description:	Possibly employs anti-virtualization techniques

Rule name:	Web_Generic_Binary_URL_Download Create hunting rule
Author:	Serhii Kocherhan
Description:	Detects files containing HTTP or HTTPS links pointing directly to .bin payload extensions.

File information

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

Web download

CatStorm

elf 81606738d41bc5e1f14da69c7e1b631b003717caaf7f9632d51f3ad2f5e2a285

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3950788/

Delivery method

Distributed via web download

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