MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2ba5cf1410f497ebffb859c704fe5c2850728c0b20ef7f69eecec860d1c989e7. 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 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2ba5cf1410f497ebffb859c704fe5c2850728c0b20ef7f69eecec860d1c989e7
SHA3-384 hash: d6f53a94eb6437662451deeca02be7f0efdbd4423acc14192e6ab0dca5a2bfdc04a9583e13b84ddd192726323068a22c
SHA1 hash: 9b9f9edc40bd7fab26eddf93861501b4a6589368
MD5 hash: eb31d09613bd35cb3d9ead276f7b793b
humanhash: sodium-grey-london-zebra
File name:linux_arm7
Download: download sample
Signature Kaiji
Create hunting rule
File size:5'308'416 bytes
First seen:2025-07-11 06:40:27 UTC
Last seen:2025-10-29 15:13:58 UTC
File type: elf
MIME type:application/x-executable
ssdeep 49152:PJzG9XxZPF773LVPN9GnMbaVZGNJru8cYWPAXq7nLYvV2rzmpxUIU1F1:hzG9Xn53LtN9pbu0Jru8cYWPAXqs
TLSH T142361A57B8D28A42C0E4367AACBDC1C433671EB99B9B12675D04FE3D3ABE1990E35314
telfhash t133c08c068c0c0cac339f83240084220853fb3da4001142690f08a1230c41835b08e07b
gimphash d32a616709154d99f5f34672a5e693bcff5dc106b2584b8d6f593ff16d689453
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
File size (compressed) :1'480'712 bytes
File size (de-compressed) :5'308'416 bytes
Format:linux/arm
Packed file: c2f59629d987fea9b54e20e6d1c10141477735ce042e6a30138aea966cb6188d

Intelligence

File Origin
# of uploads :
2
# of downloads :
15
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=6870b24d900df8e7f869b868linux22vpnfull_triage
Tags:
n/a
Result
Verdict:
Malware
Maliciousness:
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
expand golang lolbin obfuscated
Link:
https://www.filescan.io/uploads/6870b2200abaf8edd6ee9a4d/reports/9db8cb41-5ea8-4e2e-8924-f10f5e4acaf3/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/2ba5cf1410f497ebffb859c704fe5c2850728c0b20ef7f69eecec860d1c989e7
Behaviour
no suspicious findings
Botnet C2s
TCP botnet C2(s):
not identified
UDP botnet C2(s):
not identified
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/282f024f-e041-4ce1-947d-cf306aa88ee9
Behavior Graph:
Download SVG
%3 guuid=2ec3b501-1a00-0000-ccb0-6428f10a0000 pid=2801 /usr/bin/sudo guuid=56fada03-1a00-0000-ccb0-6428f30a0000 pid=2803 /tmp/sample.bin guuid=2ec3b501-1a00-0000-ccb0-6428f10a0000 pid=2801->guuid=56fada03-1a00-0000-ccb0-6428f30a0000 pid=2803 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/8aa4639b-5fad-4ad9-9127-c2b0d3dce085
Result
Threat name:
Chaos
Create hunting rule
Detection:
malicious
Classification:
spre.troj.evad
Score:
76 / 100
Link:
https://www.joesandbox.com/analysis/1733420
Signature
Drops files in suspicious directories
Multi AV Scanner detection for submitted file
Sample tries to persist itself using /etc/profile
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: 1733420 Sample: linux_arm7.elf Startdate: 11/07/2025 Architecture: LINUX Score: 76 114 154.201.82.47, 34680, 34684, 54340 PEGTECHINCUS Seychelles 2->114 116 34.243.160.129, 42468, 443 AMAZON-02US United States 2->116 118 www.google.com 2->118 120 Multi AV Scanner detection for submitted file 2->120 122 Yara detected Chaos 2->122 124 Uses known network protocols on non-standard ports 2->124 12 sshd sshd linux_arm7.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 110 /etc/id.services.conf, ELF 12->110 dropped 112 /etc/32678, POSIX 12->112 dropped 134 Sample tries to set files in /etc globally writable 12->134 136 Writes identical ELF files to multiple locations 12->136 22 linux_arm7.elf linux_arm7.elf 12->22         started        26 linux_arm7.elf bash 12->26         started        28 linux_arm7.elf service systemctl 12->28         started        30 sshd 12->30         started        32 System.img.config service systemctl 16->32         started        34 System.img.config sh 16->34         started        36 System.img.config pkill 16->36         started        38 System.img.config System.img.config 16->38         started        40 sshd 18->40         started        signatures6 process7 file8 102 /etc/profile.d/bash_config.sh, a 22->102 dropped 104 /etc/profile.d/bash_config, ELF 22->104 dropped 106 /etc/init.d/linux_kill, POSIX 22->106 dropped 108 /boot/System.img.config, ELF 22->108 dropped 126 Sample tries to set files in /etc globally writable 22->126 128 Writes identical ELF files to multiple locations 22->128 130 Sample tries to persist itself using /etc/profile 22->130 132 Drops files in suspicious directories 22->132 42 linux_arm7.elf bash 22->42         started        44 linux_arm7.elf update-rc.d 22->44         started        46 linux_arm7.elf bash 22->46         started        48 bash 32678 26->48         started        50 service 28->50         started        56 3 other processes 28->56 52 service 32->52         started        58 3 other processes 32->58 54 sh 32678 34->54         started        signatures9 process10 process11 72 4 other processes 42->72 60 update-rc.d systemctl 44->60         started        74 3 other processes 46->74 62 32678 id.services.conf 48->62         started        64 32678 sleep 48->64         started        66 service systemctl 50->66         started        68 service sed 50->68         started        76 2 other processes 52->76 70 32678 sleep 54->70         started        process12 78 id.services.conf service 62->78         started        80 id.services.conf bash 62->80         started        82 id.services.conf pkill 62->82         started        84 id.services.conf id.services.conf 62->84         started        process13 86 service 78->86         started        88 service basename 78->88         started        90 service basename 78->90         started        92 service systemctl 78->92         started        94 bash 32678 80->94         started        process14 96 service systemctl 86->96         started        98 service sed 86->98         started        100 32678 sleep 94->100         started       
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/2ba5cf1410f497ebffb859c704fe5c2850728c0b20ef7f69eecec860d1c989e7
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/2ba5cf1410f497ebffb859c704fe5c2850728c0b20ef7f69eecec860d1c989e7/
Threat name:
Linux.Trojan.Multiverze
Create hunting rule
Status:
Malicious
First seen:
2025-07-11 06:41:34 UTC
File Type:
ELF32 Little (Exe)
AV detection:
22 of 38 (57.89%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=fos46faq6sl6x75ylhdqj7s4fbihfdaledxx62poz3egbuojrhtq._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/250711-hfxxjatpw4/
Behaviour
GoLang User-Agent
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
Renames multiple (1004) files with added filename extension
Malware Config
C2 Extraction:
154.201.82.47:808
Verdict:
Malicious
Tags:
trojan chaos kaiji Unix.Trojan.Kaiji-9975495-0
YARA:
ELF_Kaiji_Chaos_April_2024
Link:
https://app.threat.zone/submission/17bc07a4-e3d6-473a-a1c6-b950884e6c59
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.30
Link:
https://yomi.yoroi.company/submissions/2ba5cf1410f497ebffb859c704fe5c2850728c0b20ef7f69eecec860d1c989e7

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:botnet_plaintext_c2
Create hunting rule
Author:cip
Description:Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols.
Rule name:DetectEncryptedVariants
Create hunting rule
Author:Zinyth
Description:Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded
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: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:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
Rule name:NET
Create hunting rule
Author:malware-lu
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: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 2ba5cf1410f497ebffb859c704fe5c2850728c0b20ef7f69eecec860d1c989e7

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3581015/
  
Delivery method
Distributed via web download
  
URLhaus
https://urlhaus.abuse.ch/url/3581018/

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