MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 f23d28bda11c6c84a409123cda2dd3753a9912860bcebfc8721cc63e5e2362ed. 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: 9

Intelligence 9 IOCs YARA 21 File information Comments

SHA256 hash:	f23d28bda11c6c84a409123cda2dd3753a9912860bcebfc8721cc63e5e2362ed
SHA3-384 hash:	f6d96f4eaaddcce67d15a5977e8fe5d06b5437a28b3ff2bd7bf50a98c04387ddd39227b4de68e5349bf271c5afec2010
SHA1 hash:	05591ec7f542a8d9c16dab51432cc8cb4300f91a
MD5 hash:	01391b841a546f2282f66e25445cfeca
humanhash:	avocado-spring-maryland-indigo
File name:	linux_386
Download:	download sample
Signature	Kaiji Create hunting rule
File size:	5'251'072 bytes
First seen:	2025-10-14 09:37:51 UTC
Last seen:	2025-10-14 15:16:06 UTC
File type:	elf
MIME type:	application/x-executable
ssdeep	49152:E33d0lGt6UHcFL7Rn2o03wiEhiDmzzd/9sARlBs/00Cpfx9a9uNbp9hW16klbU6V:E33GlbU8FwmzzRDZ9mIqRV
TLSH	T16A364A10FECB54F6D5031D3044ABE2AF67316D064B25EB83EA047F6AF97B6A51D32209
telfhash	t1b9c2ce73199da8fc67f0851387ab7120cfe6e03726d0297159f6b8c0e673d53a626878
gimphash	d32a616709154d99f5f34672a5e693bcff5dc106b2584b8d6f593ff16d689453
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

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

Result

Verdict:

Malware

Maliciousness:

Behaviour

DNS request

Locks files

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

Creating a process from a recently created file

Receives data from a server

Manages services

Creating a file

Sets a written file as executable

Launching a process

Sends data to a server

Connection attempt

Writes files to system subdirectory

Writes files to system directory

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

Verdict:

Suspicious

Threat level:

5/10

Confidence:

100%

Tags:

base64 crypto golang

Link:

https://www.filescan.io/uploads/68ee1a2971883144ef360fb1/reports/06850a9b-de9d-458f-878a-96375ffd6c8d/overview

Verdict:

Malicious

File Type:

elf.32.le

First seen:

2025-10-14T07:12:00Z UTC

Last seen:

2025-10-14T08:15:00Z UTC

Hits:

~10

Link:

https://opentip.kaspersky.com/f23d28bda11c6c84a409123cda2dd3753a9912860bcebfc8721cc63e5e2362ed/results?tab=lookup

Status:

terminated

Link:

https://sandbox.kunai.rocks/analysis/70fe72d1-0985-413b-98b4-fac4b91dd9a4

Behavior Graph:

Download SVG

Verdict:

Suspicious

Link:

https://analyze.intezer.com/analyses/d6c54d72-1c66-483c-906e-b277b2f5a602

Score:

100%

Verdict:

Malware

File Type:

ELF

Link:

https://malprob.io/report/f23d28bda11c6c84a409123cda2dd3753a9912860bcebfc8721cc63e5e2362ed

Detection:

n/a

Link:

https://mwdb.cert.pl/sample/f23d28bda11c6c84a409123cda2dd3753a9912860bcebfc8721cc63e5e2362ed/

Threat name:

Linux.Trojan.Multiverze

Status:

Malicious

First seen:

2025-10-14 09:40:51 UTC

File Type:

ELF32 Little (Exe)

AV detection:

25 of 38 (65.79%)

Threat level:

5/5

Detection(s):

Suspicious file

Link:

https://check.spamhaus.org/check/?searchterm=6i6srpnbdrwijjajci6nulotou5jseugbphl7sdsdtdd4xrdmlwq._file

Result

Malware family:

kaiji

Score:

10/10

Tags:

family:kaiji defense_evasion discovery execution linux persistence privilege_escalation

Link:

https://tria.ge/reports/251014-lmf45sysgt/

Behaviour

Enumerates kernel/hardware configuration

Reads runtime system information

Reads CPU attributes

Changes its process name

Modifies Bash startup script

Creates/modifies Cron job

Creates/modifies environment variables

Enumerates running processes

Modifies init.d

Write file to user bin folder

Executes dropped EXE

Modifies Watchdog functionality

Kaiji

Kaiji family

kaiji_chaosbot

Malware Config

C2 Extraction:

154.201.82.47:809

Verdict:

Unknown

Tags:

trojan chaos kaiji

YARA:

Linux_Trojan_Kaiji_91091be3 ELF_Kaiji_Chaos_April_2024

Link:

https://app.threat.zone/submission/80456507-6c22-4c8b-9802-b82fa851f1e6

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/f23d28bda11c6c84a409123cda2dd3753a9912860bcebfc8721cc63e5e2362ed

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:	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:	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_91091be3 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 f23d28bda11c6c84a409123cda2dd3753a9912860bcebfc8721cc63e5e2362ed

(this sample)

URLhaus

https://urlhaus.abuse.ch/url/3581019/

Delivery method

Distributed via web download

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