MalwareBazaar Database

You are currently viewing the MalwareBazaar entry for SHA256 efc0aee14544530c3d1b1abcd349d5f5d13069c923ea2c45c3f5a002927f41ce. 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


Threat unknown


Vendor detections: 7


Intelligence 7 IOCs YARA 21 File information Comments
Download sample Add tag Delete this sample Report a False Positive

SHA256 hash: efc0aee14544530c3d1b1abcd349d5f5d13069c923ea2c45c3f5a002927f41ce
SHA3-384 hash: a9d18a8ba60b5bcb444928941a88dc1f2ae62412f23642b17e965cfc06bfb4afc8eb09b31a5ddd2cb283d93c3aa2eafc
SHA1 hash: 6db2746cb5303b0fbc240560235e423d45aa4b57
MD5 hash: 17b8aa8e40b438b44cb9818e965583d6
humanhash: emma-edward-triple-winner
File name:kblockd0
Download: download sample
File size:6'160'532 bytes
First seen:2026-06-20 20:17:30 UTC
Last seen:Never
File type: elf
MIME type:application/x-executable
ssdeep 49152:sJdK4CeyQgV9c+JsNb+huYzSRsAhi/TQNCqDlPdSzg5E7w:CdKncGADGulPdJEc
TLSH T178560857B8924943C4E83677B8BE81C432631EBA9B8752566D05FE3C3EBE5D90E38314
telfhash t168e022a2df0c23cc5be00251868912698ee83abc0380bb998e2d268b1aa34ca7046019
gimphash e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
Magika elf
Reporter abuse_ch
Tags:elf upx-dec


Avatar
abuse_ch
UPX decompressed file, sourced from SHA256 ed655d6bbc9315067360982455b4d14d5ef0c5fdf7ead51550bac30e25414afa
File size (compressed) :1'737'652 bytes
File size (de-compressed) :6'160'532 bytes
Format:linux/arm
Packed file: ed655d6bbc9315067360982455b4d14d5ef0c5fdf7ead51550bac30e25414afa

Intelligence

File Origin
# of uploads :
1
# of downloads :
58
Origin country :
NL NL
Vendor Threat Intelligence
No detections
Detection(s):
SecuriteInfo.com.Linux.BackDoor.Vision.3.24532.4600.UNOFFICIAL
Create hunting rule

Result
Verdict:
Malware
Maliciousness:
Verdict:
Unknown
Threat level:
  0/10
Confidence:
100%
Tags:
crypto expand golang lolbin reconnaissance
Link:
https://www.filescan.io/uploads/6a36f59c62d0679105f9e668/reports/35fcb43b-8a38-4562-a523-5ccc01268e39/overview
Verdict:
Malicious
File Type:
elf.32.le
First seen:
2026-06-20T18:34:00Z UTC
Last seen:
2026-06-21T01:58:00Z UTC
Hits:
~10
Link:
https://opentip.kaspersky.com/efc0aee14544530c3d1b1abcd349d5f5d13069c923ea2c45c3f5a002927f41ce/results?tab=lookup
Status:
terminated
Link:
https://sandbox.kunai.rocks/analysis/b7b953b5-e67c-4ff5-979d-7085e44ab376
Behavior Graph:
Download SVG
%3 guuid=d72a06c4-1a00-0000-3a5b-335dff090000 pid=2559 /usr/bin/sudo guuid=d2c3adc6-1a00-0000-3a5b-335d060a0000 pid=2566 /tmp/sample.bin guuid=d72a06c4-1a00-0000-3a5b-335dff090000 pid=2559->guuid=d2c3adc6-1a00-0000-3a5b-335d060a0000 pid=2566 execve
Verdict:
Unknown
Link:
https://analyze.intezer.com/analyses/fec1422b-f61b-4bd1-8d3b-12f1099ff2c9
Result
Threat name:
n/a
Detection:
malicious
Classification:
troj
Score:
56 / 100
Link:
https://www.joesandbox.com/analysis/1931377
Signature
Executes the "crontab" command typically for achieving persistence
Multi AV Scanner detection for submitted file
Sample tries to persist itself using cron
Behaviour
Behavior Graph:
Download SVG
behaviorgraph top1 dnsIp2 2 Behavior Graph ID: 1931377 Sample: kblockd0.elf Startdate: 20/06/2026 Architecture: LINUX Score: 56 30 speed.cloudflare.com 162.159.140.220, 43404, 80 CLOUDFLARENET-CloudflareIncUS Canada 2->30 32 178.236.246.159, 443, 47236, 47238 CHSL-ONEGB Russia 2->32 36 Multi AV Scanner detection for submitted file 2->36 10 kblockd0.elf 2->10         started        signatures3 process4 process5 12 kblockd0.elf kblockd0.elf 10->12         started        process6 14 kblockd0.elf bash 12->14         started        16 kblockd0.elf crontab 12->16         started        signatures7 19 bash crontab 14->19         started        23 bash 14->23         started        34 Executes the "crontab" command typically for achieving persistence 16->34 process8 file9 28 /var/spool/cron/crontabs/tmp.aMHKSK, ASCII 19->28 dropped 38 Sample tries to persist itself using cron 19->38 40 Executes the "crontab" command typically for achieving persistence 19->40 25 bash crontab 23->25         started        signatures10 process11 signatures12 42 Executes the "crontab" command typically for achieving persistence 25->42
Score:
100%
Verdict:
Malware
File Type:
ELF
Link:
https://malprob.io/report/efc0aee14544530c3d1b1abcd349d5f5d13069c923ea2c45c3f5a002927f41ce
Detection:
n/a
Link:
https://mwdb.cert.pl/sample/efc0aee14544530c3d1b1abcd349d5f5d13069c923ea2c45c3f5a002927f41ce/
Threat name:
Linux.Backdoor.DarkDDoSer
Create hunting rule
Status:
Suspicious
First seen:
2026-06-20 20:21:12 UTC
File Type:
ELF32 Little (Exe)
AV detection:
10 of 24 (41.67%)
Threat level:
  5/5
Detection(s):
Suspicious file
Link:
https://check.spamhaus.org/check/?searchterm=57ak5ykfirjqypi3dk6ngsov6xita2ojepvcyrod6wqafet7ihha._file
Result
Malware family:
n/a
Score:
  6/10
Tags:
discovery execution persistence privilege_escalation
Link:
https://tria.ge/reports/260620-y26pkaht7m/
Behaviour
Enumerates kernel/hardware configuration
Reads runtime system information
Writes file to tmp directory
Creates/modifies Cron job
Enumerates running processes
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/efc0aee14544530c3d1b1abcd349d5f5d13069c923ea2c45c3f5a002927f41ce

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: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

elf ed655d6bbc9315067360982455b4d14d5ef0c5fdf7ead51550bac30e25414afa

elf efc0aee14544530c3d1b1abcd349d5f5d13069c923ea2c45c3f5a002927f41ce

(this sample)

  
Dropped by
SHA256 ed655d6bbc9315067360982455b4d14d5ef0c5fdf7ead51550bac30e25414afa
  
Dropped by
MD5 dea7147a32a1c00225289db907a0c3c9
  
URLhaus
https://urlhaus.abuse.ch/url/3868314/
  
Delivery method
Distributed via web download

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