MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b956bbefa82f464cea53ebaa9ee303813de81319f222b31b4613139258d3c0db. 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: 8


Intelligence 8 IOCs YARA 24 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b956bbefa82f464cea53ebaa9ee303813de81319f222b31b4613139258d3c0db
SHA3-384 hash: b4db1c747cd262a42c346408cafa48be87b61bc78c6e37aa8d609df627c655e6d612126880aea0bb4c11cf4fc33823fe
SHA1 hash: 64a9dbfccf9ec65d15d3af46ed9b91657e7c34b9
MD5 hash: f4bccc5b19ca78daa54daa7024ac94d9
humanhash: early-april-oregon-fillet
File name:linux_arm6
Download: download sample
Signature Kaiji
Create hunting rule
File size:5'308'416 bytes
First seen:2026-02-25 20:32:50 UTC
Last seen:2026-02-26 05:02:31 UTC
File type: elf
MIME type:application/x-executable
ssdeep 98304:8cSBHdgN2a7JP97kJru8cYWPAXqcu+60:8cS03Eu+6
TLSH T1EA362A57B8D28A42C0E4367ABCBDC1C432675EB99B9B12675D04FE3D3ABE1990E35304
telfhash t10dc02bc21f0c079cff1be0080801a70927d621310011013d8f52f0831c20cb2334c02a
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 :
2
# of downloads :
64
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
Sanesecurity.Malware.30444.LC.UNOFFICIAL
Create hunting rule

Unix.Trojan.Kaiji-9975495-0
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Unix.Malware.Kaiji-10002376-0
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Unix.Malware.Kaiji-10003612-0
Create hunting rule

Unix.Malware.Kaiji-10003670-0
Create hunting rule

Unix.Malware.Kaiji-10025522-0
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Unix.Malware.Kaiji-10028086-0
Create hunting rule

Unix.Malware.Kaiji-10028719-0
Create hunting rule

Result
Verdict:
Malware
Maliciousness:
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
arm
Packer:
not packed
Botnet:
unknown
Number of open files:
0
Number of processes launched:
0
Processes remaning?
false
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/b956bbefa82f464cea53ebaa9ee303813de81319f222b31b4613139258d3c0db
Behaviour
no suspicious findings
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Result
Gathering data
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/6aa84284-0775-4139-a1f9-fd322b995415
Result
Threat name:
Chaos
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1874993
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
Uses known network protocols on non-standard ports
Writes identical ELF files to multiple locations
Yara detected Chaos
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1874993 Sample: linux_arm6.elf Startdate: 25/02/2026 Architecture: LINUX Score: 80 122 118.107.41.238, 40920, 40924, 57914 BCPL-SGBGPNETGlobalASNSG Singapore 2->122 124 www.google.com 2->124 126 Multi AV Scanner detection for submitted file 2->126 128 Yara detected Chaos 2->128 130 Uses known network protocols on non-standard ports 2->130 12 linux_arm6.elf 2->12         started        16 systemd System.img.config 2->16         started        18 systemd cron 2->18         started        20 8 other processes 2->20 signatures3 process4 file5 118 /etc/id.services.conf, ELF 12->118 dropped 120 /etc/32678, POSIX 12->120 dropped 142 Sample tries to set files in /etc globally writable 12->142 144 Writes identical ELF files to multiple locations 12->144 22 linux_arm6.elf linux_arm6.elf 12->22         started        26 linux_arm6.elf service systemctl 12->26         started        28 linux_arm6.elf bash 12->28         started        30 System.img.config sh 16->30         started        32 System.img.config service systemctl 16->32         started        38 2 other processes 16->38 34 cron 18->34         started        36 cron 18->36         started        40 2 other processes 20->40 signatures6 process7 file8 108 /usr/lib/system-monitor, ELF 22->108 dropped 110 /usr/lib/libdlrpcld.so, ELF 22->110 dropped 112 /usr/bin/ss, ELF 22->112 dropped 114 12 other files (11 malicious) 22->114 dropped 132 Sample tries to set files in /etc globally writable 22->132 134 Writes identical ELF files to multiple locations 22->134 136 Sample tries to persist itself using /etc/profile 22->136 138 Drops files in suspicious directories 22->138 42 linux_arm6.elf bash 22->42         started        46 linux_arm6.elf service systemctl 22->46         started        56 6 other processes 22->56 58 4 other processes 26->58 48 bash 32678 28->48         started        50 sh 32678 30->50         started        60 4 other processes 32->60 52 cron sh 34->52         started        54 cron sh 36->54         started        signatures9 process10 file11 116 /etc/crontab, ASCII 42->116 dropped 140 Sample tries to persist itself using cron 42->140 62 service 46->62         started        72 3 other processes 46->72 64 32678 sleep 48->64         started        66 32678 id.services.conf 50->66         started        68 32678 sleep 50->68         started        70 sh 52->70         started        74 8 other processes 56->74 76 2 other processes 58->76 78 2 other processes 60->78 signatures12 process13 process14 80 service systemctl 62->80         started        82 service sed 62->82         started        84 id.services.conf service systemctl 66->84         started        86 id.services.conf sh 66->86         started        88 id.services.conf pkill 66->88         started        90 id.services.conf id.services.conf 66->90         started        process15 92 service 84->92         started        94 service basename 84->94         started        96 service basename 84->96         started        98 service systemctl 84->98         started        100 sh 32678 86->100         started        process16 102 service systemctl 92->102         started        104 service sed 92->104         started        106 32678 sleep 100->106         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b956bbefa82f464cea53ebaa9ee303813de81319f222b31b4613139258d3c0db
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b956bbefa82f464cea53ebaa9ee303813de81319f222b31b4613139258d3c0db/
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2026-02-25 20:34:28 UTC
File Type:
ELF32 Little (Exe)
AV detection:
20 of 36 (55.56%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xfllx35if5dez2st5ovj5yydqe66qeyz6irlgg2gcmjzewgtydnq._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/260225-zb8xnsex7a/
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
Renames multiple (1004) files with added filename extension
Malware Config
C2 Extraction:
118.107.41.238:808
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/b956bbefa82f464cea53ebaa9ee303813de81319f222b31b4613139258d3c0db

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
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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: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: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
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Author:ToroGuitar
Rule name:RIPEMD160_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for RIPEMD-160 constants
Rule name:setsockopt
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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: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 b956bbefa82f464cea53ebaa9ee303813de81319f222b31b4613139258d3c0db

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3785697/
  
Delivery method
Distributed via web download

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