MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b0b5bc89370f00b11f44d9a260bc0d234a94ab8c5c3d65eb3346488afcbeeb27. 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 17 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: b0b5bc89370f00b11f44d9a260bc0d234a94ab8c5c3d65eb3346488afcbeeb27
SHA3-384 hash: 2c318f16d4edb84e211be5463fa0805286ed82c69d45256bdd99c4019231f0275d70348fb78b35ddd534e298aafd13a1
SHA1 hash: 631ba3f4b7505c4752e835c1d9245d6dcbabc58d
MD5 hash: 002ce195e2bcb0028cfd10b0ab3603e0
humanhash: river-spring-black-echo
File name:linux_arm7
Download: download sample
Signature Kaiji
Create hunting rule
File size:2'097'152 bytes
First seen:2026-02-22 11:24:25 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 24576:gNwGGRggwEGpD5IaZIJzIDgliOAMUh1Rskiq1zpQHCaRU7axVL0rK7k3dVh/cviW:VrcNoL03z82T16
TLSH T193A50857B8918582C4E42677ACBE81C833635EB99B8653266D04FE3C3EBF2D90E35354
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 :
44
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:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
base64 crypto golang
Link:
https://www.filescan.io/uploads/699ae7a29eaae846593d9158/reports/6bbd1b84-cd33-42ec-ae9f-702593186ac2/overview
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/b0b5bc89370f00b11f44d9a260bc0d234a94ab8c5c3d65eb3346488afcbeeb27
Behaviour
no suspicious findings
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Result
Gathering data
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-02-03T02:23:00Z UTC
Last seen:
2026-02-03T02:44:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/b0b5bc89370f00b11f44d9a260bc0d234a94ab8c5c3d65eb3346488afcbeeb27/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/ccd356fa-bd89-4483-a005-cdab76423709
Behavior Graph:
Download SVG
%3 guuid=2aa0705d-1900-0000-539a-f5bafb080000 pid=2299 /usr/bin/sudo guuid=3faa0660-1900-0000-539a-f5ba03090000 pid=2307 /tmp/sample.bin guuid=2aa0705d-1900-0000-539a-f5bafb080000 pid=2299->guuid=3faa0660-1900-0000-539a-f5ba03090000 pid=2307 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/9030c021-8394-4294-bcb2-a4e2159b3e6b
Result
Threat name:
Kaiji
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1873007
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 signatures2 2 Behavior Graph ID: 1873007 Sample: linux_arm7.elf Startdate: 22/02/2026 Architecture: LINUX Score: 72 71 Multi AV Scanner detection for submitted file 2->71 73 Yara detected Kaiji 2->73 9 linux_arm7.elf 2->9         started        11 systemd snapd-env-generator 2->11         started        13 systemd snapd-env-generator 2->13         started        15 systemd 2->15         started        process3 process4 17 linux_arm7.elf linux_arm7.elf 9->17         started        file5 61 /etc/profile.d/bash_cfg.sh, Bourne-Again 17->61 dropped 63 /etc/init.d/ssh, POSIX 17->63 dropped 65 /etc/init.d/spice-vdagent, POSIX 17->65 dropped 67 38 other files (37 malicious) 17->67 dropped 75 Sample tries to set files in /etc globally writable 17->75 77 Sample tries to persist itself using /etc/profile 17->77 79 Drops files in suspicious directories 17->79 21 linux_arm7.elf bash 17->21         started        25 linux_arm7.elf service systemctl 17->25         started        27 linux_arm7.elf bash 17->27         started        29 2 other processes 17->29 signatures6 process7 file8 69 /etc/crontab, ASCII 21->69 dropped 81 Sample tries to persist itself using cron 21->81 31 service 25->31         started        33 service basename 25->33         started        35 service basename 25->35         started        37 service systemctl 25->37         started        39 bash 32676 27->39         started        41 bash systemctl 29->41         started        43 bash systemctl 29->43         started        45 bash systemctl 29->45         started        47 4 other processes 29->47 signatures9 process10 process11 49 service systemctl 31->49         started        51 service sed 31->51         started        53 32676 sleep 39->53         started        55 32676 sleep 39->55         started        57 32676 sleep 39->57         started        59 2 other processes 39->59
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b0b5bc89370f00b11f44d9a260bc0d234a94ab8c5c3d65eb3346488afcbeeb27
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b0b5bc89370f00b11f44d9a260bc0d234a94ab8c5c3d65eb3346488afcbeeb27/
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2026-02-04 01:45:15 UTC
File Type:
ELF32 Little (Exe)
AV detection:
22 of 36 (61.11%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=wc23zcjxb4alch2e3grgbpanenfjjk4mlq6wl2ztizeiv7f65mtq._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/260222-njes1shx5h/
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:
air.duffy.baby:888
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.64
Link:
https://yomi.yoroi.company/submissions/b0b5bc89370f00b11f44d9a260bc0d234a94ab8c5c3d65eb3346488afcbeeb27

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 b0b5bc89370f00b11f44d9a260bc0d234a94ab8c5c3d65eb3346488afcbeeb27

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3782901/
  
Delivery method
Distributed via web download

Comments