Overview

overview

10

Static

static

1

k.elf

ubuntu-18.04-amd64

10

k.elf

ubuntu-20.04-amd64

10

Resubmissions

28-04-2024 19:36

240428-ybn2tsff8v 10

28-04-2024 19:22

240428-x3cbnsfd2t 10

28-04-2024 19:18

240428-xz2gdseh66 10

28-04-2024 19:07

240428-xsyrxsfa5x 1

Analysis

  • max time kernel
    19s
  • max time network
    26s
  • platform
    ubuntu-20.04_amd64
  • resource
    ubuntu2004-amd64-20240418-en
  • resource tags

    arch:amd64arch:i386image:ubuntu2004-amd64-20240418-enkernel:5.4.0-169-genericlocale:en-usos:ubuntu-20.04-amd64system
  • submitted
    28-04-2024 19:36

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General

  • Target

    k.elf

  • Size

    1.5MB

  • MD5

    cfb6d21ffe7c4279f761f2351c0810ee

  • SHA1

    ee827023780964574f28c6ba333d800b73eae5c4

  • SHA256

    95776f31cbcac08eb3f3e9235d07513a6d7a6bf9f1b7f3d400b2cf0afdb088a7

  • SHA512

    c24342fe718d9cd8be98741cb7962b39cdf887b855ac0d7d6c0bbdd346fffd3f1dd1bdb91728bd16efe61456792fcc70b17e6f98cc052e229d186f1d7a28a9b8

  • SSDEEP

    24576:t4mEitdoHarsfZqy5hEiefNvF6pVuQYGM:tdE2dxrUqy5ep5F6mQlM

Score
10/10
contievasionpersistenceransomware

Malware Config

Extracted

Path

/readme.txt

Family

conti

Ransom Note
All of your files are currently encrypted by CONTI strain. If you don't know who we are - just "Google it." As you already know, all of your data has been encrypted by our software. It cannot be recovered by any means without contacting our team directly. DON'T TRY TO RECOVER your data by yourselves. Any attempt to recover your data (including the usage of the additional recovery software) can damage your files. However, if you want to try - we recommend choosing the data of the lowest value. DON'T TRY TO IGNORE us. We've downloaded a pack of your internal data and are ready to publish it on our news website if you do not respond. So it will be better for both sides if you contact us as soon as possible. DON'T TRY TO CONTACT feds or any recovery companies. We have our informants in these structures, so any of your complaints will be immediately directed to us. So if you will hire any recovery company for negotiations or send requests to the police/FBI/investigators, we will consider this as a hostile intent and initiate the publication of whole compromised data immediately. To prove that we REALLY CAN get your data back - we offer you to decrypt two random files completely free of charge. You can contact our team directly for further instructions through our website : TOR VERSION : (you should download and install TOR browser first https://torproject.org) http://contirec7nchr45rx6ympez5rjldibnqzh7lsa56lvjvaeywhvoj3wad.onion/ykCDUCsFcCYo8BNSsvH2TZTvCnEUM30XKoeCZiXUQEjPnzp1nee2ivFY0hAf7frb YOU SHOULD BE AWARE! We will speak only with an authorized person. It can be the CEO, top management, etc. In case you are not such a person - DON'T CONTACT US! Your decisions and action can result in serious harm to your company! Inform your supervisors and stay calm!
URLs

http://contirec7nchr45rx6ympez5rjldibnqzh7lsa56lvjvaeywhvoj3wad.onion/ykCDUCsFcCYo8BNSsvH2TZTvCnEUM30XKoeCZiXUQEjPnzp1nee2ivFY0hAf7frb

Signatures

  • Conti Ransomware

    Ransomware generally thought to be a successor to Ryuk.

    ransomwareconti
  • Renames multiple (20848) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Deletes journal logs 1 TTPs 2 IoCs

    Deletes systemd journal logs. Likely to evade detection.

    evasion
  • Creates/modifies Cron job 1 TTPs 5 IoCs

    Cron allows running tasks on a schedule, and is commonly used for malware persistence.

    persistence
  • Deletes log files 1 TTPs 14 IoCs

    Deletes log files on the system.

  • Reads MAC address of network interface 2 TTPs 1 IoCs

    Fetches the MAC address of active network interfaces. May be used to detect known values for hypervisors.

    evasion
  • Reads network interface configuration 2 TTPs 64 IoCs

    Fetches information about one or more active network interfaces.

  • Reads network transmission queue length 2 TTPs 1 IoCs

    Fetches the value of the tranmission queue length of the network interface (relevant for DDoS attacks).

  • Reads CPU attributes 1 TTPs 64 IoCs
  • Enumerates kernel/hardware configuration 1 TTPs 64 IoCs

    Reads contents of /sys virtual filesystem to enumerate system information.

Processes

  • /tmp/k.elf
    /tmp/k.elf sh ./k.elf --path /
    1⤵
    • Deletes journal logs
    • Creates/modifies Cron job
    • Deletes log files
    • Reads MAC address of network interface
    • Reads network interface configuration
    • Reads network transmission queue length
    • Reads CPU attributes
    • Enumerates kernel/hardware configuration
    PID:1483

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • /readme.txt
    Filesize

    1KB

    MD5

    f2ec65b6ccc5e28343ce62a48279027f

    SHA1

    7ef88d7845747810a522b73b48f85774cc3d5d0e

    SHA256

    a01e047b193671716125c6cf06171b0b0cac332631065ea5320fff4be0971582

    SHA512

    b48e8c82812e03afbc39f55f59e5110d181b107000c87491eb6adfebe19b7a3679dac6debb5fd0319afb53a12ed476dd4d5212aa5470e8b015ff1abdb3ce1b38

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