MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 12f65318aa3316ad18c0a9e879f1171fbcfee23d4717e5925a12867e42b9f589. 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: 10


Intelligence 10 IOCs YARA 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 12f65318aa3316ad18c0a9e879f1171fbcfee23d4717e5925a12867e42b9f589
SHA3-384 hash: b8d2c3cee1b511825eff0d5f68e772bbe19d5e6cc7aba2b44699a324b2dd647c4a4e92f322665860e341dee12ba0d34b
SHA1 hash: 68b46315cf1575f191d4eda495af71e87ad7b94d
MD5 hash: 527db97913b8800370566ca8b874f070
humanhash: mississippi-bluebird-robert-earth
File name:linux_arm5
Download: download sample
Signature Kaiji
Create hunting rule
File size:2'097'152 bytes
First seen:2026-01-15 18:07:44 UTC
Last seen:2026-01-16 02:26:43 UTC
File type: elf
MIME type:application/x-executable
ssdeep 24576:J1rMILphWsdRm6vM7lUVJtq8wfe9OqbVgYQ3k48jtIMoG34WJnWVh1BPnjKqZdtX:JVfjmAMo2T1
TLSH T1CFA5F857B8918552C4E42637BCBE81C833635EB99B8663666D04FE3C3ABF2D90E35314
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:elf kaiji

Intelligence

File Origin
# of uploads :
4
# of downloads :
52
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Unix.Malware.Kaiji-9992785-0
Create hunting rule

Unix.Malware.Kaiji-9993888-0
Create hunting rule

Unix.Malware.Kaiji-10000905-0
Create hunting rule

Unix.Malware.Kaiji-10002375-0
Create hunting rule

Unix.Malware.Kaiji-10003730-0
Create hunting rule

Unix.Malware.Kaiji-10003738-0
Create hunting rule

Unix.Malware.Kaiji-10003978-0
Create hunting rule

Unix.Malware.Kaiji-10014302-0
Create hunting rule

Unix.Malware.Kaiji-10017581-0
Create hunting rule

Unix.Malware.Kaiji-10028720-0
Create hunting rule

Verdict:
Malicious
Threat level:
  10/10
Confidence:
100%
Tags:
base64 crypto golang
Link:
https://www.filescan.io/uploads/69692d1c584f1963ad552911/reports/79fa59c9-62a5-4eba-9a9a-941b15e40c1c/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-01-15T15:18:00Z UTC
Last seen:
2026-01-15T18:39:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.Linux.Agent.ne
Link:
https://opentip.kaspersky.com/12f65318aa3316ad18c0a9e879f1171fbcfee23d4717e5925a12867e42b9f589/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/ea59dce8-88ef-433d-be18-f95e6d7a8326
Behavior Graph:
Download SVG
%3 guuid=7dd836eb-1900-0000-2d66-8c2c670a0000 pid=2663 /usr/bin/sudo guuid=806551ee-1900-0000-2d66-8c2c700a0000 pid=2672 /tmp/sample.bin guuid=7dd836eb-1900-0000-2d66-8c2c670a0000 pid=2663->guuid=806551ee-1900-0000-2d66-8c2c700a0000 pid=2672 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/d3263f2f-8b74-434d-b979-f69d072f0028
Result
Threat name:
Kaiji
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1851568
Signature
Drops files in suspicious directories
Multi AV Scanner detection for submitted file
Sample tries to persist itself using /etc/profile
Sample tries to persist itself using cron
Sample tries to set files in /etc globally writable
Yara detected Kaiji
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1851568 Sample: linux_arm5.elf Startdate: 15/01/2026 Architecture: LINUX Score: 72 82 202.61.139.18, 8080 TH-AS-APTianhaiInfoTechCN Australia 2->82 84 www.google.com 2->84 86 Multi AV Scanner detection for submitted file 2->86 88 Yara detected Kaiji 2->88 10 linux_arm5.elf 2->10         started        12 systemd cron 2->12         started        14 udisksd dumpe2fs 2->14         started        16 4 other processes 2->16 signatures3 process4 process5 18 linux_arm5.elf linux_arm5.elf 10->18         started        22 cron 12->22         started        file6 72 /etc/profile.d/gateway.sh, Bourne-Again 18->72 dropped 74 /etc/profile.d/bash_cfg.sh, Bourne-Again 18->74 dropped 76 /etc/init.d/x11-common, POSIX 18->76 dropped 78 44 other files (43 malicious) 18->78 dropped 90 Sample tries to set files in /etc globally writable 18->90 92 Sample tries to persist itself using /etc/profile 18->92 94 Drops files in suspicious directories 18->94 24 linux_arm5.elf bash 18->24         started        28 linux_arm5.elf service systemctl 18->28         started        30 linux_arm5.elf service systemctl 18->30         started        34 6 other processes 18->34 32 cron sh 22->32         started        signatures7 process8 file9 80 /etc/crontab, ASCII 24->80 dropped 96 Sample tries to persist itself using cron 24->96 36 service 28->36         started        38 service basename 28->38         started        40 service basename 28->40         started        42 service systemctl 28->42         started        44 service 30->44         started        50 3 other processes 30->50 46 sh .mod 32->46         started        48 bash 32676 34->48         started        52 7 other processes 34->52 signatures10 process11 process12 54 service systemctl 36->54         started        56 service sed 36->56         started        58 service systemctl 44->58         started        60 service sed 44->60         started        62 .mod 46->62         started        64 32676 sleep 48->64         started        66 32676 sleep 48->66         started        68 32676 sleep 48->68         started        70 2 other processes 48->70
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/12f65318aa3316ad18c0a9e879f1171fbcfee23d4717e5925a12867e42b9f589
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/12f65318aa3316ad18c0a9e879f1171fbcfee23d4717e5925a12867e42b9f589/
Verdict:
Malicious
Threat:
Family.KAIJI
Link:
https://tip.neiki.dev/file/12f65318aa3316ad18c0a9e879f1171fbcfee23d4717e5925a12867e42b9f589
Threat name:
Linux.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2026-01-15 18:01:45 UTC
File Type:
ELF32 Little (Exe)
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=cl3fggfkgmlk2ggavhuht4ixd66p5yr5i4l6les2ckdh4qvz6weq._file
Result
Malware family:
kaiji
Create hunting rule
Score:
  10/10
Tags:
family:kaiji defense_evasion discovery execution persistence privilege_escalation ransomware
Link:
https://tria.ge/reports/260115-wq7flshx3c/
Behaviour
Command and Scripting Interpreter: Unix Shell
Enumerates kernel/hardware configuration
Reads runtime system information
Modifies Bash startup script
Creates/modifies Cron job
Creates/modifies environment variables
Disables SELinux
Enumerates running processes
Modifies init.d
Modifies systemd
Write file to user bin folder
Executes dropped EXE
Modifies Watchdog functionality
Renames multiple (1004) files with added filename extension
Malware Config
C2 Extraction:
202.61.139.18:8080
Verdict:
Malicious
Tags:
Unix.Malware.Kaiji-9992785-0
YARA:
n/a
Link:
https://app.threat.zone/submission/e312d045-530f-4ef5-918c-04d9c030290c
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Legit
Score:
0.00
Link:
https://yomi.yoroi.company/submissions/12f65318aa3316ad18c0a9e879f1171fbcfee23d4717e5925a12867e42b9f589

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: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:enterpriseunix2
Create hunting rule
Author:Tim Brown @timb_machine
Description:Enterprise UNIX
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:Linux_Generic_Threat_a40aaa96
Create hunting rule
Author:Elastic Security
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: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: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 12f65318aa3316ad18c0a9e879f1171fbcfee23d4717e5925a12867e42b9f589

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3758684/
  
Delivery method
Distributed via web download

Comments