Analysis

  • max time kernel
    149s
  • max time network
    152s
  • 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
    27/10/2026, 18:38

General

  • Target
    9267cc672d8758396927724b627ef59d9d37584cb0a318f6d9f91e41e2ca0297
  • Size 78KB
  • Sample261027-w91r6sf14p
  • SHA256 9267cc672d8758396927724b627ef59d9d37584cb0a318f6d9f91e41e2ca0297
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Modifies the dynamic linker configuration file 2 TTPs 1 IoCs

    Malware can modify the configuration file of the dynamic linker to preload malicous libraries with every executed process.

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

  • 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/9267cc672d8758396927724b627ef59d9d37584cb0a318f6d9f91e41e2ca0297
    /tmp/9267cc672d8758396927724b627ef59d9d37584cb0a318f6d9f91e41e2ca0297
    1⤵
    • Modifies the dynamic linker configuration file
    • 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
    • Writes file to shm directory
    • Writes file to tmp directory
    PID:787
    • /bin/sh
      sh -c "systemctl daemon-reload 2>/dev/null; systemctl enable killer-helper.service 2>/dev/null"
      2⤵
        PID:809
        • /usr/bin/systemctl
          systemctl daemon-reload
          3⤵
            PID:810
          • /usr/bin/systemctl
            systemctl enable killer-helper.service
            3⤵
              PID:833
          • /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:827
            • /usr/bin/systemctl
              systemctl daemon-reload
              3⤵
                PID:828
              • /usr/bin/systemctl
                systemctl enable sys-network-helper
                3⤵
                  PID:849
              • /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:907
                • /usr/bin/gcc
                  gcc -shared -fPIC -nostartfiles -o /usr/lib/.sh7f3a.so /tmp/.sh7f3a_ps.c
                  3⤵
                  • Writes file to tmp directory
                  PID:908
                  • /usr/lib/gcc/arm-linux-gnueabihf/12/cc1
                    /usr/lib/gcc/arm-linux-gnueabihf/12/cc1 -quiet -imultilib . -imultiarch arm-linux-gnueabihf /tmp/.sh7f3a_ps.c -quiet -dumpdir /usr/lib/.sh7f3a.so- -dumpbase .sh7f3a_ps.c -dumpbase-ext .c "-mfloat-abi=hard" "-mtls-dialect=gnu" -mthumb "-mlibarch=armv7-a+fp" "-march=armv7-a+fp" -fPIC -o /tmp/cc17pNC2.s
                    4⤵
                    • Writes file to tmp directory
                    PID:909
                  • /usr/local/sbin/as
                    as "-march=armv7-a+fp" "-mfloat-abi=hard" "-meabi=5" -o /tmp/ccY0Xfic.o /tmp/cc17pNC2.s
                    4⤵
                      PID:910
                    • /usr/local/bin/as
                      as "-march=armv7-a+fp" "-mfloat-abi=hard" "-meabi=5" -o /tmp/ccY0Xfic.o /tmp/cc17pNC2.s
                      4⤵
                        PID:910
                      • /usr/sbin/as
                        as "-march=armv7-a+fp" "-mfloat-abi=hard" "-meabi=5" -o /tmp/ccY0Xfic.o /tmp/cc17pNC2.s
                        4⤵
                          PID:910
                        • /usr/bin/as
                          as "-march=armv7-a+fp" "-mfloat-abi=hard" "-meabi=5" -o /tmp/ccY0Xfic.o /tmp/cc17pNC2.s
                          4⤵
                          • Writes file to tmp directory
                          PID:910
                        • /usr/lib/gcc/arm-linux-gnueabihf/12/collect2
                          /usr/lib/gcc/arm-linux-gnueabihf/12/collect2 -plugin /usr/lib/gcc/arm-linux-gnueabihf/12/liblto_plugin.so "-plugin-opt=/usr/lib/gcc/arm-linux-gnueabihf/12/lto-wrapper" "-plugin-opt=-fresolution=/tmp/cchcFqU0.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 -shared -X "--hash-style=gnu" --as-needed -m armelf_linux_eabi -o /usr/lib/.sh7f3a.so -L/usr/lib/gcc/arm-linux-gnueabihf/12 -L/usr/lib/gcc/arm-linux-gnueabihf/12/../../../arm-linux-gnueabihf -L/usr/lib/gcc/arm-linux-gnueabihf/12/../../.. -L/lib/arm-linux-gnueabihf -L/usr/lib/arm-linux-gnueabihf /tmp/ccY0Xfic.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:911
                          • /usr/bin/ld
                            /usr/bin/ld -plugin /usr/lib/gcc/arm-linux-gnueabihf/12/liblto_plugin.so "-plugin-opt=/usr/lib/gcc/arm-linux-gnueabihf/12/lto-wrapper" "-plugin-opt=-fresolution=/tmp/cchcFqU0.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 -shared -X "--hash-style=gnu" --as-needed -m armelf_linux_eabi -o /usr/lib/.sh7f3a.so -L/usr/lib/gcc/arm-linux-gnueabihf/12 -L/usr/lib/gcc/arm-linux-gnueabihf/12/../../../arm-linux-gnueabihf -L/usr/lib/gcc/arm-linux-gnueabihf/12/../../.. -L/lib/arm-linux-gnueabihf -L/usr/lib/arm-linux-gnueabihf /tmp/ccY0Xfic.o -lgcc --push-state --as-needed -lgcc_s --pop-state -lc -lgcc --push-state --as-needed -lgcc_s --pop-state
                            5⤵
                              PID:912
                      • /bin/sh
                        /bin/sh -c "journalctl --rotate --vacuum-time=1s 2>/dev/null"
                        2⤵
                        • Command and Scripting Interpreter: Unix Shell
                        PID:916
                        • /usr/bin/journalctl
                          journalctl --rotate "--vacuum-time=1s"
                          3⤵
                          • Deletes journal logs
                          PID:917

                    Network

                          MITRE ATT&CK Enterprise v16

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                          Downloads

                          .hosts.tmp.RrajwF

                          • Path /etc/.hosts.tmp.RrajwF
                          • Size 259B
                          • SHA256 ba047d3f7cb6d3c74e016282ef9f3440b7c8d13d46d91ef65ba4fd4a6256280d
                          • 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 789B
                          • SHA256 c41661170949c85624995c68d22c1b1b052d52bb8d93be9020b703dce668bd80
                          • 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.807

                          • Path /run/.killer-wd.pid.tmp.807
                          • Size 23B
                          • SHA256 2dc9127e1899c90d1980336a9174a27c594cf4caeb0f428fb46a4f1715f3b7a2
                          • MD5 SHA1 SHA512

                          .killer.pid.tmp.806

                          • Path /run/.killer.pid.tmp.806
                          • Size 23B
                          • SHA256 db41b9fb7db6a36b86ddbd247307ea7c04dfe7251cb12e8d7d841531d9cbf7d2
                          • MD5 SHA1 SHA512

                          .locker.pid.tmp.808

                          • Path /run/.locker.pid.tmp.808
                          • Size 23B
                          • SHA256 07bd38dc8ddabc1ab21f0459f473f3204c0ede10ed7bf40e1100e287539de3f5
                          • MD5 SHA1 SHA512

                          .locker.ready

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

                          .main.pid.tmp.798

                          • Path /run/.main.pid.tmp.798
                          • Size 17B
                          • SHA256 052cb27e28af13aed7a512c12b6467004b7289d7dafd4cca6239ec23cef796cc
                          • MD5 SHA1 SHA512

                          .sh7f3a.dis.list

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

                          .watchdog.pid.tmp.808

                          • Path /run/.watchdog.pid.tmp.808
                          • Size 23B
                          • SHA256 5d6250a986fc573b8b8eae1b9895547aafcce557b3d8883d700ae595aa2b8276
                          • MD5 SHA1 SHA512

                          .watchdog.pid.tmp.913

                          • Path /run/.watchdog.pid.tmp.913
                          • Size 23B
                          • SHA256 dadebdba62188565348ebcb73f5906a3d42b0e197ac67c66c59c1b8838a1007a
                          • MD5 SHA1 SHA512

                          .watchdog2.pid.tmp.808

                          • Path /run/.watchdog2.pid.tmp.808
                          • Size 23B
                          • SHA256 71a4eef5da54abc979ba3acce5e0579d6efb97bae0d8497897b7433a1290a666
                          • MD5 SHA1 SHA512

                          .sh7f3a_ps.c

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

                          cc17pNC2.s

                          • Path /tmp/cc17pNC2.s
                          • Size 1KB
                          • SHA256 b3e4762bb587540640fc88d8dfe5e7cc528d4ac6a3d004d541af871cfd792782
                          • MD5 SHA1 SHA512 TLSH

                          ccY0Xfic.o

                          • Path /tmp/ccY0Xfic.o
                          • Size 1KB
                          • SHA256 71f6d743d582451562dc00e8ebcc2340a82d3311756b4d677978e423f8d8bac7
                          • MD5 SHA1 SHA512 TLSH

                          .sh7f3a.so

                          • Path /usr/lib/.sh7f3a.so
                          • Size 5KB
                          • SHA256 08e9567dedbc0690ac111c237c2725e1159ee0c54d2c1d01606572136b803b1a
                          • MD5 SHA1 SHA512 SSDEEP TLSH

                          .system-helper

                          • Path /usr/lib/systemd/.system-helper
                          • Size 78KB
                          • SHA256 9267cc672d8758396927724b627ef59d9d37584cb0a318f6d9f91e41e2ca0297
                          • MD5 SHA1 SHA512 SSDEEP TLSH