MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 6a5ffad7eaea62eedabaacdc3269a310bf76163af730a4352ab31c7c2bf0a5e1. 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

Kaiji

Vendor detections: 11

Intelligence 11 IOCs YARA 22 File information Comments

SHA256 hash:	6a5ffad7eaea62eedabaacdc3269a310bf76163af730a4352ab31c7c2bf0a5e1
SHA3-384 hash:	cfff9dd204d8d3842223043c31dc1dd4620e0987d312d2cbe346242d6183396dacb8271fbb07cb19d99ed5094c676f5b
SHA1 hash:	ddb699426187ba800e6d4efabd7e1fd052e06867
MD5 hash:	89e5e9057c8d7599b4bcb2ac01a5fec7
humanhash:	mountain-wisconsin-princess-iowa
File name:	linux_amd64
Download:	download sample
Signature	Kaiji Create hunting rule
File size:	5'435'392 bytes
First seen:	2025-07-11 06:40:31 UTC
Last seen:	2025-10-29 15:13:43 UTC
File type:	elf
MIME type:	application/x-executable
ssdeep	49152:7Xa6xzZWhrb/T4vO90dL3BmAFd4A64nsfJPJ6TdXnT9aqeJaz2xNkapDnYRQoj13:b2ONLBzSxtSTLElHz
TLSH	T14C463943F89095A8C1EED13086629293BA717C895F3463D32F50FBB92B76BD46E79310
telfhash	t1cb42aa3549bc74b5a6a6da21f3a3b4b4953359b163f834b05023ad95efc0e805ce683b
gimphash	8489141d42b5763d2533ede66ffeb9a2eae979105cb5dc27154b16bbb78716ff
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 kaiji

UPX unpacked

This file is the unpacked version of a file that has been packed with UPX. Below is furhter information about the parent (compressed) file.

File size (compressed) :	1'770'228 bytes
File size (de-compressed) :	5'435'392 bytes
Format:	linux/amd64
Packed file:	5fe9f096f711fe78bfa1f4a3fcbb41b39a016a8ef47d55e8adba14bb358a0a78

Intelligence

File Origin

# of uploads :

# of downloads :

Origin country :

Vendor Threat Intelligence

Detection(s):

Sanesecurity.Malware.30444.LC.UNOFFICIAL

Unix.Trojan.Kaiji-9975495-0

Unix.Malware.Kaiji-10002376-0

Unix.Malware.Kaiji-10003612-0

Unix.Malware.Kaiji-10003670-0

Unix.Malware.Kaiji-10025522-0

Unix.Malware.Kaiji-10028086-0

Unix.Malware.Kaiji-10028719-0

Verdict:

Malicious

Score:

70%

Link:

https://cyber-fortress.com/docs/result/index.php?id=6870b255c9eb974737684605linux22vpnfull_triage

Tags:

malware

Result

Verdict:

Malware

Maliciousness:

Behaviour

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

Sends data to a server

Receives data from a server

Connection attempt

Kills processes

DNS request

Creating a file

Sets a written file as executable

Creates directories in a system directory

Launching a process

Locks files

Mounts file systems

Manages services

Creating a process from a recently created file

Substitutes an application name

Replaces system binary files

Writes files to system subdirectory

Writes files to system directory

Creates or modifies files in /cron to set up autorun

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

Creates or modifies files to set up autorun

Performs a bruteforce attack in the network

Verdict:

Likely Malicious

Threat level:

7.5/10

Confidence:

100%

Tags:

expand golang lolbin obfuscated

Link:

https://www.filescan.io/uploads/6870b2227df8aa79caef0c6d/reports/cd96ad8b-c1d1-4817-9564-d70dc479e32a/overview

Status:

terminated

Link:

https://sandbox.kunai.rocks/analysis/8f5abccd-4cec-40f7-895a-15f7787fa649

Behavior Graph:

Download SVG

Malware family:

Kaiji

Verdict:

Malicious

Link:

https://analyze.intezer.com/analyses/0325a812-4971-46e9-be32-427d8d2c2548

Score:

100%

Verdict:

Malware

File Type:

ELF

Link:

https://malprob.io/report/6a5ffad7eaea62eedabaacdc3269a310bf76163af730a4352ab31c7c2bf0a5e1

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/6a5ffad7eaea62eedabaacdc3269a310bf76163af730a4352ab31c7c2bf0a5e1/

Threat name:

Linux.Trojan.Multiverze

Status:

Malicious

First seen:

2025-07-11 06:41:37 UTC

File Type:

ELF64 Little (Exe)

AV detection:

24 of 37 (64.86%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=njp7vv7k5jro5wv2vtode2ndcc7xmfr264ykinjkwmohyk7quxqq._file

Result

Malware family:

kaiji

Score:

10/10

Tags:

family:kaiji defense_evasion discovery execution linux persistence privilege_escalation

Link:

https://tria.ge/reports/250711-hf2wgstpw8/

Behaviour

GoLang User-Agent

Enumerates kernel/hardware configuration

Reads runtime system information

Changes its process name

Modifies Bash startup script

Creates/modifies Cron job

Creates/modifies environment variables

Enumerates running processes

Modifies init.d

Modifies systemd

Write file to user bin folder

Executes dropped EXE

Modifies Watchdog functionality

Kaiji

Kaiji family

kaiji_chaosbot

Malware Config

C2 Extraction:

154.201.82.47:808

Verdict:

Malicious

Tags:

trojan kaiji chaos Unix.Trojan.Kaiji-9975495-0

YARA:

Linux_Trojan_Kaiji_dcf6565e ELF_Kaiji_Chaos_April_2024

Link:

https://app.threat.zone/submission/ecb53d8a-cafd-46f3-b1f5-50470e6ee399

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/6a5ffad7eaea62eedabaacdc3269a310bf76163af730a4352ab31c7c2bf0a5e1

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:	botnet_plaintext_c2 Create hunting rule
Author:	cip
Description:	Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.

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_duffcopy_amd64 Create hunting rule

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

Rule name:	Linux_Generic_Threat_a40aaa96 Create hunting rule
Author:	Elastic Security

Rule name:	Linux_Trojan_Kaiji_dcf6565e Create hunting rule
Author:	Elastic Security

Rule name:	MD5_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for MD5 constants

Rule name:	NET Create hunting rule
Author:	malware-lu

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:	RIPEMD160_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for RIPEMD-160 constants

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

Rule name:	SHA1_Constants Create hunting rule
Author:	phoul (@phoul)
Description:	Look for SHA1 constants

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

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

File information

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

Web download

Kaiji

elf 6a5ffad7eaea62eedabaacdc3269a310bf76163af730a4352ab31c7c2bf0a5e1

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3581017/

Delivery method

Distributed via web download

URLhaus

https://urlhaus.abuse.ch/url/3581020/

BLint

The following table provides more information about this file using BLint. BLint is a Binary Linter to check the security properties, and capabilities in executables.

Findings

ID	Title	Severity
CHECK_PIE	Missing Position-Independent Executable (PIE) Protection	high

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