MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc. 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: b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc
SHA3-384 hash: 1fc49ec052e7205a5d66d7548d5240ab9d721c8196232474b90ae7841f36423ab7d1b9f38ed9328beced594dcebddfb1
SHA1 hash: 85f9cfc24aa3fc33b290598f1138c187c87c9e9c
MD5 hash: f917e4b714be613d75531efd532df4f3
humanhash: purple-low-aspen-white
File name:linux_mips64
Download: download sample
Signature Kaiji
Create hunting rule
File size:2'359'296 bytes
First seen:2026-02-22 11:24:26 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 12288:WY8Zinp3M6B0XBgI19CUdMp3LAQh1CapAaxVX4ltPuMFLgbM8yn+kvgftZAMcq+:bm6WBk7XVX4lRuMFL4o+k4fcR
TLSH T1D0B5F8117F49EE5FD69422354EA6C33833967C14C2A03133AB51F7292FBA2B88D5ADD4
gimphash e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Magika elf
Reporter abuse_ch
Tags:elf kaiji

Intelligence

File Origin
# of uploads :
1
# of downloads :
62
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-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/699ae7a397feb4afd651c061/reports/79e22446-ccd6-4ce5-8db9-c3b89b1d1c7d/overview
Verdict:
Malicious
Uses P2P?:
false
Uses anti-vm?:
false
Architecture:
mips
Packer:
not packed
Botnet:
unknown
Number of open files:
7
Number of processes launched:
1
Processes remaning?
false
Remote TCP ports scanned:
not identified
Full report:
https://elfdigest.com/brief/b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc
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.64.be
Detections:
HEUR:Trojan.Linux.Agent.ne
Link:
https://opentip.kaspersky.com/b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/0b199b6c-174d-43a6-baf1-2c157cd1a8f0
Behavior Graph:
Download SVG
%3 guuid=b170aedd-1900-0000-d9c5-e89dce0a0000 pid=2766 /usr/bin/sudo guuid=f1b04edf-1900-0000-d9c5-e89dd30a0000 pid=2771 /tmp/sample.bin guuid=b170aedd-1900-0000-d9c5-e89dce0a0000 pid=2766->guuid=f1b04edf-1900-0000-d9c5-e89dd30a0000 pid=2771 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/488bd6fb-957e-49ee-9269-15fa2d1d2f61
Result
Threat name:
Kaiji
Create hunting rule
Detection:
malicious
Classification:
troj
Score:
56 / 100
Link:
https://www.joesandbox.com/analysis/1873006
Signature
Multi AV Scanner detection for submitted file
Yara detected Kaiji
Behaviour
Behavior Graph:
Download SVG
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc/
Verdict:
Malicious
Threat:
Family.KAIJI
Link:
https://tip.neiki.dev/file/b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2026-02-20 12:31:48 UTC
File Type:
ELF64 Big (Exe)
AV detection:
17 of 36 (47.22%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=xankwtw5zntih6kenlwng5vqkdx3fy32fdlbulbutvvfxobafdoa._file
Result
Malware family:
kaiji
Create hunting rule
Score:
  10/10
Tags:
family:kaiji discovery
Link:
https://tria.ge/reports/260222-njes1shx6b/
Behaviour
System Network Configuration Discovery
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/b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc

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 b81aab4eddcb6683f9446aecd376b050efb2e37a28d61a2c349d6a5bb82028dc

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3782900/
  
Delivery method
Distributed via web download

Comments