Analysis

  • max time kernel
    152s
  • max time network
    157s
  • platform
    debian-12_mipsel
  • resource
    debian12-mipsel-20260513-en
  • resource tags

    arch:mipselimage:debian12-mipsel-20260513-enkernel:6.1.0-17-4kc-maltalocale:en-usos:debian-12-mipselsystem
  • submitted
    17/10/2026, 12:54

General

  • Target
    mipsel.elf
  • Size 86KB
  • Sample261017-p5a8dsfz6w
  • SHA256 085536903727f568126ea37e509f0972f91bb7e7187a2f4b75a6fdfb34fa278b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Deletes itself 1 IoCs
  • Deletes journal logs 1 TTPs 2 IoCs

    Deletes systemd journal logs. Likely to evade detection.

  • 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 2 IoCs

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

  • Deletes log files 1 TTPs 4 IoCs

    Deletes log files on the 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

  • Modifies rc script 2 TTPs 1 IoCs

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

  • Modifies systemd 2 TTPs 2 IoCs

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

  • UPX packed file 1 IoCs

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

  • 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.

  • Reads system network configuration 1 TTPs 2 IoCs

    Uses contents of /proc filesystem to enumerate network settings.

  • Command and Scripting Interpreter: Unix Shell 1 TTPs 3 IoCs

    Execute scripts via Unix Shell.

  • Reads runtime system information 64 IoCs

    Reads data from /proc virtual filesystem.

  • System Network Configuration Discovery 1 TTPs 5 IoCs

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

  • Writes file to shm directory 1 IoCs

    Malware can drop malicious files in the shm directory which will run directly from RAM.

  • Writes file to tmp directory 8 IoCs

    Malware often drops required files in the /tmp directory.

Processes

  • /tmp/mipsel.elf
    /tmp/mipsel.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
    • System Network Configuration Discovery
    • Writes file to shm directory
    • Writes file to tmp directory
    PID:799
    • /bin/sh
      sh -c "systemctl daemon-reload 2>/dev/null; systemctl enable killer-helper.service 2>/dev/null"
      2⤵
        PID:818
        • /usr/bin/systemctl
          systemctl daemon-reload
          3⤵
            PID:822
          • /usr/bin/systemctl
            systemctl enable killer-helper.service
            3⤵
              PID:865
          • /bin/sh
            /bin/sh -c "systemctl daemon-reload 2>/dev/null;systemctl enable sys-network-helper 2>/dev/null"
            2⤵
            • Command and Scripting Interpreter: Unix Shell
            PID:857
            • /usr/bin/systemctl
              systemctl daemon-reload
              3⤵
                PID:858
            • /bin/sh
              /bin/sh -c "gcc -shared -fPIC -nostartfiles -o /usr/lib/.sh7f3a.so /tmp/.sh7f3a_ps.c 2>/dev/null"
              2⤵
              • Command and Scripting Interpreter: Unix Shell
              PID:884
              • /usr/bin/gcc
                gcc -shared -fPIC -nostartfiles -o /usr/lib/.sh7f3a.so /tmp/.sh7f3a_ps.c
                3⤵
                • Writes file to tmp directory
                PID:887
                • /usr/lib/gcc/mipsel-linux-gnu/12/cc1
                  /usr/lib/gcc/mipsel-linux-gnu/12/cc1 -quiet -imultiarch mipsel-linux-gnu /tmp/.sh7f3a_ps.c -mel -quiet -dumpdir /usr/lib/.sh7f3a.so- -dumpbase .sh7f3a_ps.c -dumpbase-ext .c "-march=mips32r2" -mfpxx -mllsc -mno-lxc1-sxc1 -mno-madd4 -mips32r2 "-mabi=32" -fPIC -o /tmp/ccJtyMgW.s
                  4⤵
                  • Writes file to tmp directory
                  PID:890
                • /usr/local/sbin/as
                  as -EL -mips32r2 -O1 "-mabi=32" "-march=mips32r2" -mfpxx -KPIC -o /tmp/ccsq0m8u.o /tmp/ccJtyMgW.s
                  4⤵
                  • System Network Configuration Discovery
                  PID:920
                • /usr/local/bin/as
                  as -EL -mips32r2 -O1 "-mabi=32" "-march=mips32r2" -mfpxx -KPIC -o /tmp/ccsq0m8u.o /tmp/ccJtyMgW.s
                  4⤵
                  • System Network Configuration Discovery
                  PID:920
                • /usr/sbin/as
                  as -EL -mips32r2 -O1 "-mabi=32" "-march=mips32r2" -mfpxx -KPIC -o /tmp/ccsq0m8u.o /tmp/ccJtyMgW.s
                  4⤵
                  • System Network Configuration Discovery
                  PID:920
                • /usr/bin/as
                  as -EL -mips32r2 -O1 "-mabi=32" "-march=mips32r2" -mfpxx -KPIC -o /tmp/ccsq0m8u.o /tmp/ccJtyMgW.s
                  4⤵
                  • System Network Configuration Discovery
                  • Writes file to tmp directory
                  PID:920
                • /usr/lib/gcc/mipsel-linux-gnu/12/collect2
                  /usr/lib/gcc/mipsel-linux-gnu/12/collect2 -plugin /usr/lib/gcc/mipsel-linux-gnu/12/liblto_plugin.so "-plugin-opt=/usr/lib/gcc/mipsel-linux-gnu/12/lto-wrapper" "-plugin-opt=-fresolution=/tmp/cch8eFVq.res" "-plugin-opt=-pass-through=-lgcc" "-plugin-opt=-pass-through=-lgcc_s" "-plugin-opt=-pass-through=-lc" "-plugin-opt=-pass-through=-lgcc" "-plugin-opt=-pass-through=-lgcc_s" --build-id --eh-frame-hdr -EL -mips32r2 -shared --as-needed -melf32ltsmip -o /usr/lib/.sh7f3a.so -L/usr/lib/gcc/mipsel-linux-gnu/12 -L/usr/lib/gcc/mipsel-linux-gnu/12/../../../mipsel-linux-gnu -L/usr/lib/gcc/mipsel-linux-gnu/12/../../../../lib -L/lib/mipsel-linux-gnu -L/lib/../lib -L/usr/lib/mipsel-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/mipsel-linux-gnu/12/../../.. /tmp/ccsq0m8u.o -lgcc --push-state --as-needed -lgcc_s --pop-state -lc -lgcc --push-state --as-needed -lgcc_s --pop-state
                  4⤵
                  • Writes file to tmp directory
                  PID:931
                  • /usr/bin/ld
                    /usr/bin/ld -plugin /usr/lib/gcc/mipsel-linux-gnu/12/liblto_plugin.so "-plugin-opt=/usr/lib/gcc/mipsel-linux-gnu/12/lto-wrapper" "-plugin-opt=-fresolution=/tmp/cch8eFVq.res" "-plugin-opt=-pass-through=-lgcc" "-plugin-opt=-pass-through=-lgcc_s" "-plugin-opt=-pass-through=-lc" "-plugin-opt=-pass-through=-lgcc" "-plugin-opt=-pass-through=-lgcc_s" --build-id --eh-frame-hdr -EL -mips32r2 -shared --as-needed -melf32ltsmip -o /usr/lib/.sh7f3a.so -L/usr/lib/gcc/mipsel-linux-gnu/12 -L/usr/lib/gcc/mipsel-linux-gnu/12/../../../mipsel-linux-gnu -L/usr/lib/gcc/mipsel-linux-gnu/12/../../../../lib -L/lib/mipsel-linux-gnu -L/lib/../lib -L/usr/lib/mipsel-linux-gnu -L/usr/lib/../lib -L/usr/lib/gcc/mipsel-linux-gnu/12/../../.. /tmp/ccsq0m8u.o -lgcc --push-state --as-needed -lgcc_s --pop-state -lc -lgcc --push-state --as-needed -lgcc_s --pop-state
                    5⤵
                      PID:932
              • /bin/sh
                /bin/sh -c "journalctl --rotate --vacuum-time=1s 2>/dev/null"
                2⤵
                • Command and Scripting Interpreter: Unix Shell
                PID:939
                • /usr/bin/journalctl
                  journalctl --rotate "--vacuum-time=1s"
                  3⤵
                  • Deletes journal logs
                  PID:940

            Network

                  MITRE ATT&CK Enterprise v16

                  Replay Monitor

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                  Downloads

                  .hosts.tmp.ezb2Lm

                  • Path /etc/.hosts.tmp.ezb2Lm
                  • Size 260B
                  • SHA256 2d451db42819e20705cd5e37451e0295cb803e7f8f387245d991e34268ebcff7
                  • MD5 SHA1 SHA512 TLSH

                  killer-helper

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

                  sys-network-helper

                  • Path /etc/cron.d/sys-network-helper
                  • Size 150B
                  • SHA256 e7bb309ff17d69ef561d96ecc0ad135f9bab5469ba8191f7af6dccc2e6c37195
                  • MD5 SHA1 SHA512 TLSH

                  hosts

                  • Path /etc/hosts
                  • Size 790B
                  • SHA256 a64e60adb38020455d9eaf9edb069e1de5ce854de2f2c4f9d17959d981fb2b16
                  • MD5 SHA1 SHA512 TLSH

                  rc.local

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

                  rc.local

                  • Path /etc/rc.local
                  • Size 82B
                  • SHA256 97d017afb74ffd6d4eed7a79ae899a03c546e5d99c85d0ed79fcdce7aebbd7e1
                  • MD5 SHA1 SHA512 TLSH

                  killer-helper.service

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

                  sys-network-helper.service

                  • Path /etc/systemd/system/sys-network-helper.service
                  • Size 210B
                  • SHA256 518382f73b30f63e61911f79eb230ed7e3f3f4b2d78c4ab6a872315bac869bec
                  • MD5 SHA1 SHA512 TLSH

                  .killer-wd.pid.tmp.813

                  • Path /run/.killer-wd.pid.tmp.813
                  • Size 23B
                  • SHA256 3a0f1691c3c810402d8a820b66b3f8d53ced64b9c41e62869589198feb30da53
                  • MD5 SHA1 SHA512

                  .killer.pid.tmp.812

                  • Path /run/.killer.pid.tmp.812
                  • Size 23B
                  • SHA256 d393a61906c691977d6460bed45c8d14618fc8e957ff94b5599e456f0d3f3805
                  • MD5 SHA1 SHA512

                  .locker.pid.tmp.814

                  • Path /run/.locker.pid.tmp.814
                  • Size 23B
                  • SHA256 fc2b1652b889988f73934356f63fa9d7aef41ca45c54156e95e68d559a6f8597
                  • MD5 SHA1 SHA512

                  .locker.ready

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

                  .main.pid.tmp.806

                  • Path /run/.main.pid.tmp.806
                  • Size 17B
                  • SHA256 e9fef8d56a24102420d0b79b5624745dd23af0f044a49e85ab12b32afa28ad70
                  • MD5 SHA1 SHA512

                  .sh7f3a.dis.list

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

                  .watchdog.pid.tmp.814

                  • Path /run/.watchdog.pid.tmp.814
                  • Size 23B
                  • SHA256 1c8cfe14ff8c45832a6f7d01a1c40b0717af2551036569cd70c4f885cec51cd8
                  • MD5 SHA1 SHA512

                  .watchdog2.pid.tmp.934

                  • Path /run/.watchdog2.pid.tmp.934
                  • Size 23B
                  • SHA256 62ec11d12af4ee104478c0d31d0a3d17f7f0ee5ad07b949d7a6b654ee9017b1a
                  • MD5 SHA1 SHA512

                  .sh7f3a_ps.c

                  • Path /tmp/.sh7f3a_ps.c
                  • Size 666B
                  • SHA256 c758ddb7e83c86b8a02edcaf11c4b96e1876699775e486301d3061393fc14b6e
                  • MD5 SHA1 SHA512 TLSH

                  ccJtyMgW.s

                  • Path /tmp/ccJtyMgW.s
                  • Size 2KB
                  • SHA256 d5125aec15cc33c73ba80918e309403e49710d60e3da05353e4b2a516e0d3a63
                  • MD5 SHA1 SHA512 TLSH

                  ccsq0m8u.o

                  • Path /tmp/ccsq0m8u.o
                  • Size 2KB
                  • SHA256 bfc01c5c2c585d5c81649f6875df4044b0cb2ae24ce2fd62dc1c1051b126f859
                  • MD5 SHA1 SHA512 TLSH

                  .sh7f3a.so

                  • Path /usr/lib/.sh7f3a.so
                  • Size 3KB
                  • SHA256 2e198ad529ecbb016e96b30a0d29b3990f128a29344845cff848cea366d35c0a
                  • MD5 SHA1 SHA512 TLSH

                  .system-helper

                  • Path /usr/lib/systemd/.system-helper
                  • Size 86KB
                  • SHA256 085536903727f568126ea37e509f0972f91bb7e7187a2f4b75a6fdfb34fa278b
                  • MD5 SHA1 SHA512 SSDEEP TLSH