MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 030591b467593a55e2215a181225db2c11156b2bb1d6f75dfb6239992aaba5fe. 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 19 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 030591b467593a55e2215a181225db2c11156b2bb1d6f75dfb6239992aaba5fe
SHA3-384 hash: 26cd65a30ee5bf45358fcb877f8561d4b6e9e94d2793af0b2fe4ae0b32af4d36d4e1d2b53f1397a4cee73086c3b68576
SHA1 hash: 612ea9e968bab314e27ee733c83158a3594c3f65
MD5 hash: 29c6d4b73cff818e527fa6f4ce8dddf2
humanhash: king-failed-michigan-twenty
File name:linux_arm5
Download: download sample
Signature Kaiji
Create hunting rule
File size:5'308'416 bytes
First seen:2025-02-22 17:51:21 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 24576:NBevLbv7wrmhhgVyOPL7K7iUWeVdSAavqEGlFurQDmXdHnnm2bcyY7YBKVKVmo9s:HrrlTmA7koH9CiKey6ahGWInkTAsVI1
TLSH T134362B87B8924682C0E4367ABDBD81D533731EB9AB9B12676D04FE3C3ABE1950D35314
telfhash t1e6d0125bae8e17ac7ba1c54c1148428c44d938e0149102ec9f59671bee03e30b1de43a
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 :
1
# of downloads :
20
Origin country :
US US
Vendor Threat Intelligence
Detection(s):
Unix.Malware.Kaiji-10003730-0
Create hunting rule

Unix.Malware.Kaiji-10003917-0
Create hunting rule

Unix.Malware.Kaiji-10014826-0
Create hunting rule

Unix.Malware.Kaiji-10028246-0
Create hunting rule

Verdict:
Clean
Score:
84.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67ba0ed0a0fd713c335c596elinux22vpnfull_triage
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Deleting a recently created file
Manages services
Connection attempt
Creating a file
Mounts file systems
Sets a file as executable
Creates directories in a system directory
Collects information on the RAM
Sets a written file as executable
Locks files
Launching a process
Runs as daemon
Creating a process from a recently created file
Receives data from a server
Sends data to a server
Changes the time when the file was created, accessed, or modified
Writes files to system directory
Writes files to system subdirectory
Replaces system binary files
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
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/2e6b3ff1-da56-497f-b6ad-512d268254f3
Result
Threat name:
Kaiji
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1621890
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
Writes identical ELF files to multiple locations
Yara detected Kaiji
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1621890 Sample: linux_arm5.elf Startdate: 22/02/2025 Architecture: LINUX Score: 76 89 196.251.85.22, 40122, 50000 SONIC-WirelessZA Seychelles 2->89 91 109.202.202.202, 80 INIT7CH Switzerland 2->91 93 2 other IPs or domains 2->93 95 Multi AV Scanner detection for submitted file 2->95 97 Yara detected Kaiji 2->97 11 linux_arm5.elf 2->11         started        13 systemd cron 2->13         started        15 systemd System.mod 2->15         started        17 5 other processes 2->17 signatures3 process4 process5 19 linux_arm5.elf linux_arm5.elf 11->19         started        23 cron 13->23         started        25 System.mod System.mod 15->25         started        27 System.mod System.mod 17->27         started        file6 79 /usr/lib/system-mark, ELF 19->79 dropped 81 /usr/lib/libgdi.so.0.8.1, ELF 19->81 dropped 83 /usr/bin/ss, ELF 19->83 dropped 85 63 other files (62 malicious) 19->85 dropped 99 Sample tries to set files in /etc globally writable 19->99 101 Writes identical ELF files to multiple locations 19->101 103 Sample tries to persist itself using /etc/profile 19->103 105 Drops files in suspicious directories 19->105 29 linux_arm5.elf bash 19->29         started        33 linux_arm5.elf service systemctl 19->33         started        35 linux_arm5.elf service systemctl 19->35         started        39 6 other processes 19->39 37 cron sh 23->37         started        signatures7 process8 file9 87 /etc/crontab, ASCII 29->87 dropped 107 Sample tries to persist itself using cron 29->107 41 service 33->41         started        43 service basename 33->43         started        45 service basename 33->45         started        47 service systemctl 33->47         started        49 service 35->49         started        55 3 other processes 35->55 51 sh .mod 37->51         started        53 bash 32675 39->53         started        57 7 other processes 39->57 signatures10 process11 process12 59 service systemctl 41->59         started        61 service sed 41->61         started        63 service systemctl 49->63         started        65 service sed 49->65         started        67 .mod libgdi.so.0.8.1 51->67         started        69 32675 opt.services.cfg 53->69         started        71 32675 sleep 53->71         started        73 32675 sleep 53->73         started        process13 75 libgdi.so.0.8.1 libgdi.so.0.8.1 67->75         started        77 opt.services.cfg opt.services.cfg 69->77         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/030591b467593a55e2215a181225db2c11156b2bb1d6f75dfb6239992aaba5fe
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/030591b467593a55e2215a181225db2c11156b2bb1d6f75dfb6239992aaba5fe/
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2025-02-22 17:52:33 UTC
File Type:
ELF32 Little (Exe)
AV detection:
15 of 24 (62.50%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=amczdndhle5flyrblimbejo3fqirk2zlwhlpoxp3mi4zskvlux7a._file
Result
Malware family:
kaiji
Create hunting rule
Score:
  10/10
Tags:
family:kaiji defense_evasion discovery execution persistence privilege_escalation
Link:
https://tria.ge/reports/250222-wfs58svjbs/
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
Enumerates running processes
Modifies init.d
Write file to user bin folder
Executes dropped EXE
Modifies Watchdog functionality
Kaiji
Kaiji family
Malware Config
C2 Extraction:
196.251.85.22:50000
Verdict:
Malicious
Tags:
Unix.Malware.Kaiji-10003730-0
YARA:
n/a
Link:
https://app.threat.zone/submission/e9721319-4f61-4c21-b3f0-666b363e3ec9
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/030591b467593a55e2215a181225db2c11156b2bb1d6f75dfb6239992aaba5fe

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: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: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_Generic_Threat_cd9ce063
Create hunting rule
Author:Elastic Security
Rule name:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
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:test_Malaysia
Create hunting rule
Author:rectifyq
Description:Detects file containing malaysia string
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 030591b467593a55e2215a181225db2c11156b2bb1d6f75dfb6239992aaba5fe

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3448831/
  
Delivery method
Distributed via web download

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