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MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 5aa6cc2b09d7fa0d3c5b6826f872826f5d3afb9af18c001ea3f4f1a1ccb188f7. 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 12 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 5aa6cc2b09d7fa0d3c5b6826f872826f5d3afb9af18c001ea3f4f1a1ccb188f7
SHA3-384 hash: 2069973d297f57cc451d3b48065aa83f9b7df153045d5d5602d7ba2a6379267ae2d034b6eb9f06712557be5af40d5db5
SHA1 hash: 1a13ffb1f327ae411689568840b0e812b7d40a59
MD5 hash: 259800bf6d1eb21a74ff1737f9826a0a
humanhash: delta-foxtrot-ink-angel
File name:linux_386
Download: download sample
Signature Kaiji
Create hunting rule
File size:1'908'736 bytes
First seen:2025-04-16 18:38:05 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 24576:Inoxw1zy7RvFMNRlnmxlJgAaI0ODBBri8wnJPVwchQItBPUgpxv2SzVVOMaWz1v:s/MBFBuEItpRpsSIWz1
TLSH T1CA951851FDCB54F2E4061A3105ABA2AF23319D054F34EBD7EA40BA6AFD777D50832268
telfhash t19752bf732a6d58ec77f048038a5b7120cea6e02b16f0257249f76490fb73d535b7a9b8
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 :
81
Origin country :
DE DE
Vendor Threat Intelligence
Detection(s):
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-10014302-0
Create hunting rule

Unix.Malware.Kaiji-10017581-0
Create hunting rule

Unix.Malware.Kaiji-10028720-0
Create hunting rule

Unix.Malware.Kaiji-9992785-0
Create hunting rule

Unix.Malware.Kaiji-9993888-0
Create hunting rule

Verdict:
Clean
Score:
84.2%
Link:
https://cyber-fortress.com/docs/result/index.php?id=67fff9f7f3fd91e7d60bd81alinux22vpnfull_triage
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:

Behaviour
Creating a process from a recently created file
Launching a process
Connection attempt
Manages services
Creates directories in a system directory
Mounts file systems
Creating a file
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
Replaces system binary files
Creates or modifies files in /cron to set up autorun
Substitutes an application name
Writes files to system subdirectory
Creates or modifies files to set up autorun
Creates or modifies files in /init.d to set up autorun
Verdict:
Unknown
Threat level:
  2.5/10
Confidence:
100%
Tags:
crypto golang
Link:
https://www.filescan.io/uploads/67fff918e9c1e257979b2d27/reports/0b79590a-f83b-4459-97ce-9fd370e582ab/overview
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/adfc626e-6e9b-4fb1-98e7-f9a471f0e5f0
Result
Threat name:
Kaiji
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
72 / 100
Link:
https://www.joesandbox.com/analysis/1666670
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 dnsIp2 2 Behavior Graph ID: 1666670 Sample: linux_386.elf Startdate: 16/04/2025 Architecture: LINUX Score: 72 95 154.40.47.248, 51600, 888 COGENT-174US United States 2->95 97 34.243.160.129, 42468, 443 AMAZON-02US United States 2->97 99 www.google.com 2->99 103 Multi AV Scanner detection for submitted file 2->103 105 Yara detected Kaiji 2->105 11 linux_386.elf 2->11         started        13 systemd cron 2->13         started        15 systemd cron 2->15         started        17 8 other processes 2->17 signatures3 process4 process5 19 linux_386.elf linux_386.elf 11->19         started        23 cron 13->23         started        25 cron 15->25         started        27 System.mod System.mod 17->27         started        29 System.mod System.mod 17->29         started        file6 85 /etc/profile.d/gateway.sh, Bourne-Again 19->85 dropped 87 /etc/profile.d/bash_cfg.sh, Bourne-Again 19->87 dropped 89 /etc/init.d/x11-common, POSIX 19->89 dropped 91 44 other files (43 malicious) 19->91 dropped 107 Sample tries to set files in /etc globally writable 19->107 109 Sample tries to persist itself using /etc/profile 19->109 111 Drops files in suspicious directories 19->111 31 linux_386.elf bash 19->31         started        35 linux_386.elf service systemctl 19->35         started        37 linux_386.elf service systemctl 19->37         started        43 6 other processes 19->43 39 cron sh 23->39         started        41 cron sh 25->41         started        signatures7 process8 file9 93 /etc/crontab, ASCII 31->93 dropped 101 Sample tries to persist itself using cron 31->101 45 service 35->45         started        47 service basename 35->47         started        57 2 other processes 35->57 49 service 37->49         started        59 3 other processes 37->59 51 sh .mod 39->51         started        53 sh .mod 41->53         started        55 bash 32676 43->55         started        61 7 other processes 43->61 signatures10 process11 process12 63 service systemctl 45->63         started        65 service sed 45->65         started        77 2 other processes 49->77 67 .mod libgdi.so.0.8.1 51->67         started        69 .mod libgdi.so.0.8.1 53->69         started        71 32676 sleep 55->71         started        73 32676 sleep 55->73         started        75 32676 sleep 55->75         started        79 2 other processes 55->79 process13 81 libgdi.so.0.8.1 libgdi.so.0.8.1 67->81         started        83 libgdi.so.0.8.1 libgdi.so.0.8.1 69->83         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/5aa6cc2b09d7fa0d3c5b6826f872826f5d3afb9af18c001ea3f4f1a1ccb188f7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/5aa6cc2b09d7fa0d3c5b6826f872826f5d3afb9af18c001ea3f4f1a1ccb188f7/
Threat name:
Linux.Trojan.Kaiji
Create hunting rule
Status:
Malicious
First seen:
2025-04-16 18:39:08 UTC
File Type:
ELF32 Little (Exe)
AV detection:
17 of 24 (70.83%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=lktmykyj275a2pc3natpq4ucn5otv6426ggaahvd6ty2dtfrrd3q._file
Result
Malware family:
kaiji
Create hunting rule
Score:
  10/10
Tags:
family:kaiji defense_evasion discovery execution linux persistence privilege_escalation
Link:
https://tria.ge/reports/250416-w94ttstyht/
Behaviour
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
Kaiji
Kaiji family
Malware Config
C2 Extraction:
154.40.47.248:809
Verdict:
Malicious
Tags:
trojan Unix.Malware.Kaiji-9992785-0
YARA:
Linux_Generic_Threat_fc5b5b86
Link:
https://app.threat.zone/submission/0583e04e-4aca-4dc3-ab2a-d31a69abbf87
Please note that we are no longer able to provide a coverage score for Virus Total.

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: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_fc5b5b86
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: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 5aa6cc2b09d7fa0d3c5b6826f872826f5d3afb9af18c001ea3f4f1a1ccb188f7

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3513592/
  
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