MalwareBazaar Database
You are currently viewing the MalwareBazaar entry for SHA256 fb58552f2e41f83d38518142997eab68d9f1068b597ad43549ab44f9b2621af5. 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: 11
| SHA256 hash: | fb58552f2e41f83d38518142997eab68d9f1068b597ad43549ab44f9b2621af5 |
|---|---|
| SHA3-384 hash: | 4453999abe05d6fe4560a0b20a842242849ca3bbc3b2a847f071cc068f15e4fdfe78fc8a069a8e7f3072ba0b599a44f1 |
| SHA1 hash: | 6a2dac23924884669dbfff312188509ddbe4e7ee |
| MD5 hash: | 1582d96a93c2000b5d625bac7a963584 |
| humanhash: | kitten-missouri-island-hydrogen |
| File name: | bin.x86 |
| Download: | download sample |
| Signature | Kaiji |
| File size: | 5'545'984 bytes |
| First seen: | 2025-09-27 21:18:27 UTC |
| Last seen: | 2025-09-28 03:44:13 UTC |
| File type: | elf |
| MIME type: | application/x-executable |
| ssdeep | 49152:4W90Ga1nPZbrb/TKvO90dL3BmAFd4A64nsfJUTS/E6NepnIovmixGSqQcSiSZeTq:3OzpUsLaeVPSEDzu |
| TLSH | T11F463B03F89191A4C0EED130C666D2A3BA717C955B3423D32B61FBBA1B36BD46E79314 |
| telfhash | t1f7a22f744abc70b1a666c966f3b370b4e23359b553f474b100277d52efe0e891ca682b |
| gimphash | a8339da982f99d99395c680393c0ca2d196d5312ac4b6b80c1cdcaae4eb15388 |
| 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 :
2
# of downloads :
52
Origin country :
DEVendor Threat Intelligence
Result
Verdict:
Malware
Maliciousness:
Behaviour
Changes the time when the file was created, accessed, or modified
Sends data to a server
Receives data from a server
Connection attempt
Kills processes
DNS request
Creating a file
Sets a written file as executable
Creates directories in a system directory
Launching a process
Locks files
Mounts file systems
Manages services
Creating a process from a recently created file
Substitutes an application name
Replaces system binary files
Writes files to system subdirectory
Writes files to system directory
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
Performs a bruteforce attack in the network
Verdict:
Unknown
Threat level:
2.5/10
Confidence:
100%
Tags:
base64 crypto expand golang lolbin masquerade
Verdict:
Malicious
File Type:
elf.64.le
First seen:
2025-09-27T18:26:00Z UTC
Last seen:
2025-09-27T18:26:00Z UTC
Hits:
~10
Detections:
HEUR:Trojan.Linux.Chaos.mj
Status:
terminated
Behavior Graph:
Malware family:
Kaiji
Verdict:
Malicious
Result
Threat name:
Chaos
Detection:
malicious
Classification:
spre.troj.evad
Score:
76 / 100
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
Uses known network protocols on non-standard ports
Yara detected Chaos
Behaviour
Behavior Graph:
Score:
100%
Verdict:
Malware
File Type:
ELF
Verdict:
Malicious
Threat:
Family.KAIJI
Threat name:
Linux.Trojan.Kaiji
Status:
Malicious
First seen:
2025-09-27 21:19:28 UTC
File Type:
ELF64 Little (Exe)
AV detection:
14 of 24 (58.33%)
Threat level:
5/5
Detection(s):
Suspicious file
Result
Malware family:
kaiji
Score:
10/10
Tags:
family:kaiji defense_evasion discovery execution linux persistence privilege_escalation
Behaviour
GoLang User-Agent
Enumerates kernel/hardware configuration
Reads runtime system information
Changes its process name
Reads CPU attributes
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
kaiji_chaosbot
Malware Config
C2 Extraction:
202.61.139.18:8080
Verdict:
Unknown
Tags:
trojan chaos kaiji
YARA:
Linux_Trojan_Kaiji_dcf6565e ELF_Kaiji_Chaos_April_2024
Malware family:
Kaiji
Verdict:
Malicious
Please note that we are no longer able to provide a coverage score for Virus Total.
Threat name:
Suspicious File
Score:
0.36
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 |
|---|---|
| Author: | cip |
| Description: | Attempts to match at least some of the strings used in some botnet variants which use plaintext communication protocols. |
| Rule name: | CP_AllMal_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | CrossPlatform All Malwares Detector: Detect PE, ELF, Mach-O, scripts, archives; overlay, obfuscation, encryption, spoofing, hiding, high entropy, network communication |
| Rule name: | CP_Script_Inject_Detector |
|---|---|
| Author: | DiegoAnalytics |
| Description: | Detects attempts to inject code into another process across PE, ELF, Mach-O binaries |
| Rule name: | DetectEncryptedVariants |
|---|---|
| Author: | Zinyth |
| Description: | Detects 'encrypted' in ASCII, Unicode, base64, or hex-encoded |
| Rule name: | DetectGoMethodSignatures |
|---|---|
| Author: | Wyatt Tauber |
| Description: | Detects Go method signatures in unpacked Go binaries |
| Rule name: | Detect_Go_GOMAXPROCS |
|---|---|
| Author: | Obscurity Labs LLC |
| Description: | Detects Go binaries by the presence of runtime.GOMAXPROCS in the runtime metadata |
| Rule name: | enterpriseapps2 |
|---|---|
| Author: | Tim Brown @timb_machine |
| Description: | Enterprise apps |
| Rule name: | F01_s1ckrule |
|---|---|
| Author: | s1ckb017 |
| Rule name: | GoBinTest |
|---|
| Rule name: | golang |
|---|
| Rule name: | golang_binary_string |
|---|---|
| Description: | Golang strings present |
| Rule name: | golang_duffcopy_amd64 |
|---|
| Rule name: | identity_golang |
|---|---|
| Author: | Eric Yocam |
| Description: | find Golang malware |
| Rule name: | Linux_Generic_Threat_a40aaa96 |
|---|---|
| Author: | Elastic Security |
| Rule name: | Linux_Trojan_Kaiji_dcf6565e |
|---|---|
| Author: | Elastic Security |
| Rule name: | MD5_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for MD5 constants |
| Rule name: | NET |
|---|---|
| Author: | malware-lu |
| Rule name: | ProgramLanguage_Golang |
|---|---|
| Author: | albertzsigovits |
| Description: | Application written in Golang programming language |
| Rule name: | RANSOMWARE |
|---|---|
| Author: | ToroGuitar |
| Rule name: | RIPEMD160_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for RIPEMD-160 constants |
| Rule name: | setsockopt |
|---|---|
| Author: | Tim Brown @timb_machine |
| Description: | Hunts for setsockopt() red flags |
| Rule name: | SHA1_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for SHA1 constants |
| Rule name: | SHA512_Constants |
|---|---|
| Author: | phoul (@phoul) |
| Description: | Look for SHA384/SHA512 constants |
| Rule name: | unixredflags3 |
|---|---|
| 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
Delivery method
Distributed via web download
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