MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 2f99b81bc710002d56dcd99a8a7be981cfdb0e273fe5a2e77597dc887b22bf52. 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


Mirai


Vendor detections: 8


Intelligence 8 IOCs YARA 22 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: 2f99b81bc710002d56dcd99a8a7be981cfdb0e273fe5a2e77597dc887b22bf52
SHA3-384 hash: d6110149326139f2fbcd7f6e6889ab414bdd057746dd5af93e5c81d49bc049680fa9c0103f0933ef6e74fbeeb4217796
SHA1 hash: 4ff7753142eb6fd361733ea4edec083639118eb2
MD5 hash: fbb3040538e259d51501647cfe2b790a
humanhash: violet-friend-ohio-alanine
File name:arm5
Download: download sample
Signature Mirai
Create hunting rule
File size:4'980'888 bytes
First seen:2026-05-23 16:01:47 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 49152:3ux/+ioBE1Xuz7pEFPHrh91lXKY4Rm/ww6B7VUyizDXenlM1h:+x/+S1X/9HL1laY4RGm5izDXenlM1h
TLSH T120361A87B8D24A43C4E4367AB87D81C872A34EB99B97135A5D04FE3C3BBE1990E35714
telfhash t175e0c2875e6c33ec93c9814416c78a1e9ff13afd026007bc0e8d729b0995c4930da030
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 mirai

Intelligence

File Origin
# of uploads :
1
# of downloads :
50
Origin country :
DE DE
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Linux.Siggen.12337.8867.4571.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:

Behaviour
Sets a written file as executable
Receives data from a server
Collects information on the network activity
Collects information on the RAM
Creating a file
Connection attempt
Sends data to a server
Writes files to system directory
Deletes a system binary file
Creates or modifies files in /init.d to set up autorun
Verdict:
Likely Malicious
Threat level:
  7.5/10
Confidence:
100%
Tags:
base64 crypto expand golang lolbin obfuscated reconnaissance
Link:
https://www.filescan.io/uploads/6a11cf8befbd399b39c927e5/reports/bf770f1b-e279-4f8b-9899-76f67fbe817b/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-05-23T13:09:00Z UTC
Last seen:
2026-05-25T06:57:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/2f99b81bc710002d56dcd99a8a7be981cfdb0e273fe5a2e77597dc887b22bf52/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/bed9d6cf-e919-4248-b0e9-85e4a49d675d
Behavior Graph:
Download SVG
%3 guuid=840d4346-1900-0000-cb90-cdfc470e0000 pid=3655 /usr/bin/sudo guuid=4b1fcb48-1900-0000-cb90-cdfc4e0e0000 pid=3662 /tmp/sample.bin guuid=840d4346-1900-0000-cb90-cdfc470e0000 pid=3655->guuid=4b1fcb48-1900-0000-cb90-cdfc4e0e0000 pid=3662 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/1660e468-5d4c-4b98-ac4e-719436a82e96
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/2f99b81bc710002d56dcd99a8a7be981cfdb0e273fe5a2e77597dc887b22bf52
Detection:
mirai
Create hunting rule
Link:
https://mwdb.cert.pl/sample/2f99b81bc710002d56dcd99a8a7be981cfdb0e273fe5a2e77597dc887b22bf52/
Threat name:
Linux.Hacktool.Flooder
Create hunting rule
Status:
Malicious
First seen:
2026-05-23 16:02:35 UTC
File Type:
ELF32 Little (Exe)
AV detection:
15 of 38 (39.47%)
Threat level:
  1/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=f6m3qg6hcaac2vw43gniu67jqhh5wdrhh7s2fz3vs7oiq6zcx5ja._file
Result
Malware family:
n/a
Score:
  6/10
Tags:
defense_evasion discovery persistence privilege_escalation
Link:
https://tria.ge/reports/260523-tgyq1afv9v/
Behaviour
Enumerates kernel/hardware configuration
Reads runtime system information
Modifies Bash startup script
Creates/modifies environment variables
Write file to user bin folder
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/2f99b81bc710002d56dcd99a8a7be981cfdb0e273fe5a2e77597dc887b22bf52

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: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: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:MD5_Constants
Create hunting rule
Author:phoul (@phoul)
Description:Look for MD5 constants
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: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:TH_Generic_MassHunt_Linux_Malware_2026_CYFARE
Create hunting rule
Author:CYFARE
Description:Generic Linux malware mass-hunt rule - 2026
Reference:https://cyfare.net/
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

Mirai

elf 2f99b81bc710002d56dcd99a8a7be981cfdb0e273fe5a2e77597dc887b22bf52

(this sample)

  
URLhaus
https://urlhaus.abuse.ch/url/3852127/
  
Delivery method
Distributed via web download

Comments