MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b16fd31d9411c06a1761ce65ffaad4e11187af7034edccdfd127878c76e830e8. 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 13 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b16fd31d9411c06a1761ce65ffaad4e11187af7034edccdfd127878c76e830e8
SHA3-384 hash: 4a4b83bbbfe61fa5fd16b582d78028533d360dc7ab492db645b6faa4bc76aa3165c6f2dbd3cbe3f43352a08f13158ba8
SHA1 hash: d55efc711e7b3c21a545fc31f565299c8740e2a0
MD5 hash: 94fc17943369ac9ad8a615732fe3ab0d
humanhash: enemy-rugby-march-robin
File name:linux_arm64
Download: download sample
Signature Kaiji
Create hunting rule
File size:5'177'344 bytes
First seen:2025-02-16 16:07:10 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 49152:7H+5dH9Zq/34LCFNoUAFKVCsh5EN2q3OY2NXxB1:r+5dH+/34LCFNoUTVCsXEN
TLSH T1C0365B65BD5EE462E6C833783B7193D4323EBC489F4192235610FFAE99F67688F12112
gimphash 3d5dfacace350f9742b321796ec1fa27e7bde5b2e04ad23d7c3d5592bdec5ebe
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 :
1
# of downloads :
104
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
Sanesecurity.Malware.30444.LC.UNOFFICIAL
Create hunting rule

Unix.Trojan.Kaiji-9975495-0
Create hunting rule

Unix.Malware.Kaiji-10002376-0
Create hunting rule

Unix.Malware.Kaiji-10003612-0
Create hunting rule

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

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

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

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

Verdict:
Clean
Score:
82.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67b20e9e28ab76d43a5b4562linux22vpnfull_triage
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a process from a recently created file
Connection attempt
Launching a process
Manages services
Locks files
Creating a file
DNS request
Receives data from a server
Sets a written file as executable
Changes the time when the file was created, accessed, or modified
Sends data to a server
Writes files to system directory
Writes files to system subdirectory
Creates or modifies files in /init.d to set up autorun
Performs a bruteforce attack in the network
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
crypto expand golang lolbin obfuscated
Link:
https://www.filescan.io/uploads/67b20d66991985e0a959e319/reports/be1846a8-689d-473a-b2ec-a63bce2a0c00/overview
Result
Verdict:
UNKNOWN
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/9595721a-acad-4cdc-b137-d9fa68b14f92
Result
Threat name:
Chaos
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
80 / 100
Link:
https://www.joesandbox.com/analysis/1616389
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: 1616389 Sample: linux_arm64.elf Startdate: 16/02/2025 Architecture: LINUX Score: 80 122 199.195.252.200, 45138, 58482, 58486 PONYNETUS United States 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 dash rm linux_arm64.elf 2->12         started        16 systemd System.img.config 2->16         started        18 sshd sshd 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_arm64.elf linux_arm64.elf 12->22         started        26 linux_arm64.elf service systemctl 12->26         started        28 linux_arm64.elf bash 12->28         started        30 System.img.config sh 16->30         started        32 System.img.config service systemctl 16->32         started        34 System.img.config pkill 16->34         started        36 System.img.config System.img.config 16->36         started        38 sshd 18->38         started        40 sshd 20->40         started        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_arm64.elf bash 22->42         started        46 linux_arm64.elf service systemctl 22->46         started        48 linux_arm64.elf bash 22->48         started        56 5 other processes 22->56 50 service 26->50         started        58 3 other processes 26->58 52 bash 32678 28->52         started        54 sh 32678 30->54         started        60 4 other processes 32->60 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        70 3 other processes 46->70 72 4 other processes 48->72 74 2 other processes 50->74 64 32678 sleep 52->64         started        66 32678 id.services.conf 54->66         started        68 32678 sleep 54->68         started        76 4 other processes 56->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 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/b16fd31d9411c06a1761ce65ffaad4e11187af7034edccdfd127878c76e830e8
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b16fd31d9411c06a1761ce65ffaad4e11187af7034edccdfd127878c76e830e8/
Threat name:
Linux.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2025-02-16 16:01:28 UTC
File Type:
ELF64 Little (Exe)
AV detection:
16 of 37 (43.24%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wfx5ghmuchaguf3bzzs77kwu4eiypl3qgtw4zx6re6dyy5xigdua._file
Result
Malware family:
kaiji
Create hunting rule
Score:
  10/10
Tags:
family:kaiji linux
Link:
https://tria.ge/reports/250216-tk7s3sskcl/
Verdict:
Malicious
Tags:
trojan chaos kaiji Unix.Trojan.Kaiji-9975495-0
YARA:
ELF_Kaiji_Chaos_April_2024
Link:
https://app.threat.zone/submission/80eb8fed-5137-424c-97f4-6664cb6c2b9d
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Kaiji
Score:
0.90
Link:
https://yomi.yoroi.company/submissions/b16fd31d9411c06a1761ce65ffaad4e11187af7034edccdfd127878c76e830e8

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:DetectGoMethodSignatures
Create hunting rule
Author:Wyatt Tauber
Description:Detects Go method signatures in unpacked Go binaries
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:NET
Create hunting rule
Author:malware-lu
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: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 b16fd31d9411c06a1761ce65ffaad4e11187af7034edccdfd127878c76e830e8

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3441981/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3441961/

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
IDTitleSeverity
CHECK_PIEMissing Position-Independent Executable (PIE) Protectionhigh

Comments