Overview

overview

7

Static

static

1

.i

debian-9-armhf

7

Analysis

  • max time kernel
    151s
  • max time network
    161s
  • platform
    debian-9_armhf
  • resource
    debian9-armhf-20221111-en
  • resource tags

    arch:armhfimage:debian9-armhf-20221111-enkernel:4.9.0-13-armmp-lpaelocale:en-usos:debian-9-armhfsystem
  • submitted
    30/06/2023, 12:09

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General

  • Target
    .i
  • Size 78KB
  • Sample230630-pbf7jsbb71
  • SHA256 a04ac6d98ad989312783d4fe3456c53730b212c79a426fb215708b6c6daa3de3
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10

Malware Config

Signatures

  • Changes its process name 1 IoCs
  • Deletes itself 1 IoCs
  • Modifies Watchdog functionality 1 TTPs 2 IoCs

    Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.

  • Enumerates active TCP sockets 1 TTPs 1 IoCs

    Gets active TCP sockets from /proc virtual filesystem.

  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Reads system routing table 1 TTPs 1 IoCs

    Gets active network interfaces from /proc virtual filesystem.

  • Reads system network configuration 1 TTPs 3 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

  • Writes file to tmp directory 1 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/.i
    /tmp/.i
    1⤵
    • Modifies Watchdog functionality
    • Reads system routing table
    • Reads system network configuration
    PID:359
  • /bin/sh
    /bin/sh -c "iptables -A INPUT -p tcp --destination-port 23 -j DROP"
    1⤵
    • Changes its process name
    • Deletes itself
    PID:366
    • /sbin/iptables
      iptables -A INPUT -p tcp --destination-port 23 -j DROP
      2⤵
        PID:367
    • /bin/sh
      /bin/sh -c "iptables -A INPUT -p tcp --destination-port 7547 -j DROP"
      1⤵
        PID:372
        • /sbin/iptables
          iptables -A INPUT -p tcp --destination-port 7547 -j DROP
          2⤵
            PID:373
        • /bin/sh
          /bin/sh -c "iptables -A INPUT -p tcp --destination-port 5555 -j DROP"
          1⤵
            PID:374
            • /sbin/iptables
              iptables -A INPUT -p tcp --destination-port 5555 -j DROP
              2⤵
                PID:375
            • /bin/sh
              /bin/sh -c "iptables -A INPUT -p tcp --destination-port 5358 -j DROP"
              1⤵
                PID:376
                • /sbin/iptables
                  iptables -A INPUT -p tcp --destination-port 5358 -j DROP
                  2⤵
                    PID:377
                • /bin/sh
                  /bin/sh -c "iptables -D INPUT -j CWMP_CR"
                  1⤵
                    PID:378
                    • /sbin/iptables
                      iptables -D INPUT -j CWMP_CR
                      2⤵
                        PID:379
                    • /bin/sh
                      /bin/sh -c "iptables -X CWMP_CR"
                      1⤵
                        PID:380
                        • /sbin/iptables
                          iptables -X CWMP_CR
                          2⤵
                            PID:381
                        • /bin/sh
                          /bin/sh -c "iptables -I INPUT -p udp --dport 58014 -j ACCEPT"
                          1⤵
                            PID:382
                            • /sbin/iptables
                              iptables -I INPUT -p udp --dport 58014 -j ACCEPT
                              2⤵
                                PID:383

                            Network

                                  MITRE ATT&CK Enterprise v6

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