Overview

overview

7

Static

static

5

b3c455c083...in.elf

debian-12-armhf

7

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    debian-12_armhf
  • resource
    debian12-armhf-20260513-en
  • resource tags

    arch:armhfimage:debian12-armhf-20260513-enkernel:6.1.0-17-armmp-lpaelocale:en-usos:debian-12-armhfsystem
  • submitted
    04/10/2026, 04:25

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General

  • Target
    b3c455c0833628ac.bin.elf
  • Size 76KB
  • Sample261004-e16hmavxas
  • SHA256 b3c455c0833628acb088290890eb1e44d154c0be5a69de5d52bb39715d0fcb68
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
7/10
antivmdefense_evasiondiscoveryexecutionpersistenceprivilege_escalationupx

Malware Config

Signatures

  • Deletes itself 1 IoCs
  • Deletes journal logs 1 TTPs 3 IoCs

    Deletes systemd journal logs. Likely to evade detection.

    defense_evasion
  • Modifies the /etc/hosts DNS resolution file 1 TTPs 1 IoCs

    Modifying the /etc/hosts name-resolution file changes IP routing, which can facilitate traffic hijacking or the blocking of (security update) endpoints.

  • Creates/modifies Cron job 1 TTPs 1 IoCs

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

    executionpersistenceprivilege_escalation
  • Deletes log files 1 TTPs 4 IoCs

    Deletes log files on the system.

    defense_evasion
  • Enumerates active TCP sockets 1 TTPs 1 IoCs

    Gets active TCP sockets from /proc virtual filesystem.

    discovery
  • Enumerates running processes

    Discovers information about currently running processes on the system

  • Modifies rc script 2 TTPs 1 IoCs

    Adding/modifying system rc scripts is a common persistence mechanism.

    persistence
  • Modifies systemd 2 TTPs 1 IoCs

    Adds/ modifies systemd service files. Likely to achieve persistence.

    persistenceprivilege_escalation
  • UPX packed file 1 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Changes its process name 10 IoCs
  • Checks CPU configuration 1 TTPs 1 IoCs

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

    antivm
  • Reads system network configuration 1 TTPs 2 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

    discovery
  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

    discovery

Processes

  • /tmp/b3c455c0833628ac.bin.elf
    /tmp/b3c455c0833628ac.bin.elf
    1⤵
    • Deletes itself
    • Modifies the /etc/hosts DNS resolution file
    • Creates/modifies Cron job
    • Deletes log files
    • Enumerates active TCP sockets
    • Modifies rc script
    • Modifies systemd
    • Changes its process name
    • Checks CPU configuration
    • Reads system network configuration
    • Reads runtime system information
    PID:786
    • /bin/sh
      sh -c "systemctl daemon-reload 2>/dev/null; systemctl enable killer-helper.service 2>/dev/null"
      2⤵
        PID:808
        • /usr/bin/systemctl
          systemctl daemon-reload
          3⤵
            PID:810
          • /usr/bin/systemctl
            systemctl enable killer-helper.service
            3⤵
              PID:837
          • /bin/sh
            sh -c "journalctl --rotate --vacuum-time=1s 2>/dev/null"
            2⤵
              PID:831
              • /usr/bin/journalctl
                journalctl --rotate "--vacuum-time=1s"
                3⤵
                • Deletes journal logs
                PID:832

          Network

                MITRE ATT&CK Enterprise v16

                Reconnaissance

                Resource Development

                Initial Access

                Execution

                Scheduled Task/Job

                1
                T1053

                Cron

                1
                T1053.003

                Persistence

                Boot or Logon Autostart Execution

                2
                T1547

                XDG Autostart Entries

                1
                T1547.013

                Boot or Logon Initialization Scripts

                1
                T1037

                RC Scripts

                1
                T1037.004

                Create or Modify System Process

                1
                T1543

                Systemd Service

                1
                T1543.002

                Scheduled Task/Job

                1
                T1053

                Cron

                1
                T1053.003

                Privilege Escalation

                Boot or Logon Autostart Execution

                2
                T1547

                XDG Autostart Entries

                1
                T1547.013

                Boot or Logon Initialization Scripts

                1
                T1037

                RC Scripts

                1
                T1037.004

                Create or Modify System Process

                1
                T1543

                Systemd Service

                1
                T1543.002

                Scheduled Task/Job

                1
                T1053

                Cron

                1
                T1053.003

                Defense Evasion

                Indicator Removal

                2
                T1070

                Clear Linux or Mac System Logs

                2
                T1070.002

                Virtualization/Sandbox Evasion

                1
                T1497

                System Checks

                1
                T1497.001

                Credential Access

                Adversary-in-the-Middle

                1
                T1557

                Discovery

                System Network Configuration Discovery

                1
                T1016

                Internet Connection Discovery

                1
                T1016.001

                System Network Connections Discovery

                1
                T1049

                Virtualization/Sandbox Evasion

                1
                T1497

                System Checks

                1
                T1497.001

                Lateral Movement

                Collection

                Adversary-in-the-Middle

                1
                T1557

                Command and Control

                Exfiltration

                Impact

                Replay Monitor

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                Downloads

                .hosts.tmp.sxChg7
                • Path /etc/.hosts.tmp.sxChg7
                • Size 258B
                • SHA256 b7a359be8b7982d8801d44e41f0d672ecc86cfcb938eee7a5739447b948b6cb8
                • MD5 SHA1 SHA512 TLSH
                Submit Download

                killer-helper
                • Path /etc/cron.d/killer-helper
                • Size 45B
                • SHA256 2401bba8cdbe1b2f259b6bac2acf553ddacea9e3f7e70dbc55a0edbec171794b
                • MD5 SHA1 SHA512
                Submit Download

                hosts
                • Path /etc/hosts
                • Size 788B
                • SHA256 ded00a7a30820919de2350adeaf63ffe17ac3aa38a8b35ba47325796f443e98b
                • MD5 SHA1 SHA512 TLSH
                Submit Download

                rc.local
                • Path /etc/rc.local
                • Size 34B
                • SHA256 39c3adba30914b4b1f783d4a6e064a69532f236ef273c9eb0dfdef32a9a7cefd
                • MD5 SHA1 SHA512
                Submit Download

                killer-helper.service
                • Path /etc/systemd/system/killer-helper.service
                • Size 186B
                • SHA256 84c3b3dd46f76cb9fffee80fda7ebcd57bbe0d5088b3eddff46b1beb3b0cf599
                • MD5 SHA1 SHA512 TLSH
                Submit Download

                .killer-wd.pid.tmp.807
                • Path /run/.killer-wd.pid.tmp.807
                • Size 23B
                • SHA256 722f5e46c375c5df9aab00ba341593fb80b2b7031a00a356df35a7f3f4001842
                • MD5 SHA1 SHA512
                Submit Download

                .killer.pid.tmp.806
                • Path /run/.killer.pid.tmp.806
                • Size 23B
                • SHA256 e9c40c09b97595db2778be1c63c372693c34475815c4d733a906ab903c3ce612
                • MD5 SHA1 SHA512
                Submit Download

                .locker.pid.tmp.809
                • Path /run/.locker.pid.tmp.809
                • Size 23B
                • SHA256 8e6aae342ff92dde8fc49a699c520d898cee7c47fa604f4de89cba14276d0859
                • MD5 SHA1 SHA512
                Submit Download

                .locker.ready
                • Path /run/.locker.ready
                • Size 1B
                • SHA256 6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b
                • MD5 SHA1 SHA512
                Submit Download

                .main.pid.tmp.798
                • Path /run/.main.pid.tmp.798
                • Size 17B
                • SHA256 72bab444c1e0198d9144f174a9c8391218686bdba32f9e5d7523183969ac77ae
                • MD5 SHA1 SHA512
                Submit Download

                .sh7f3a.dis.list
                • Path /run/.sh7f3a.dis.list
                • Size 62B
                • SHA256 5774eed03386d2d304b9c233532de7564030ecb2954556224f1e52ec92956b72
                • MD5 SHA1 SHA512 TLSH
                Submit Download

                .watchdog.pid.tmp.809
                • Path /run/.watchdog.pid.tmp.809
                • Size 23B
                • SHA256 c96f6968553c3976d000dfdfe18ff546df85f6fe0ed63143bbf92c9c4cfe70bd
                • MD5 SHA1 SHA512
                Submit Download

                .watchdog2.pid.tmp.809
                • Path /run/.watchdog2.pid.tmp.809
                • Size 23B
                • SHA256 b249b3c6b073a8f979abde9747e17bc03fe5d8592b2ff748cda3c655bd28a738
                • MD5 SHA1 SHA512
                Submit Download

                .system-helper
                • Path /usr/lib/systemd/.system-helper
                • Size 76KB
                • SHA256 b3c455c0833628acb088290890eb1e44d154c0be5a69de5d52bb39715d0fcb68
                • MD5 SHA1 SHA512 SSDEEP TLSH
                Submit Download