Analysis Overview
SHA256
e58dffab271cd20cb6089017017d8e6c5f68c56c2b1877e8a94bbcdadcd4ef4c
Threat Level: Known bad
The file linux_mips.elf was found to be: Known bad.
Malicious Activity Summary
Kaiji
Kaiji family
Executes dropped EXE
Creates/modifies Cron job
Changes its process name
Enumerates kernel/hardware configuration
Reads runtime system information
System Network Configuration Discovery
Command and Scripting Interpreter: Unix Shell
MITRE ATT&CK
Enterprise Matrix V16
Analysis: static1
Detonation Overview
Reported
2025-04-16 18:39
Signatures
Kaiji
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kaiji family
Analysis: behavioral1
Detonation Overview
Submitted
2025-04-16 18:39
Reported
2025-04-16 18:41
Platform
debian9-mipsbe-20240418-en
Max time kernel
149s
Max time network
146s
Command Line
Signatures
Kaiji
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kaiji family
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | /etc/32676 | /bin/sh | N/A |
Creates/modifies Cron job
| Description | Indicator | Process | Target |
| File opened for modification | /etc/crontab | /bin/sh | N/A |
Changes its process name
| Description | Indicator | Process | Target |
| Changes the process name, possibly in an attempt to hide itself | ksoftirqd/0 | /tmp/linux_mips.elf | N/A |
Command and Scripting Interpreter: Unix Shell
| Description | Indicator | Process | Target |
| N/A | N/A | /bin/sh | N/A |
| N/A | N/A | /bin/sh | N/A |
Enumerates kernel/hardware configuration
| Description | Indicator | Process | Target |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/kernel/mm/transparent_hugepage/hpage_pmd_size | /tmp/linux_mips.elf | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/kernel/mm/transparent_hugepage/hpage_pmd_size | /tmp/linux_mips.elf | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
| File opened for reading | /sys/fs/kdbus/0-system/bus | /bin/systemctl | N/A |
Reads runtime system information
| Description | Indicator | Process | Target |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/1/environ | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/systemctl | N/A |
| File opened for reading | /proc/cmdline | /bin/systemctl | N/A |
| File opened for reading | /proc/filesystems | /bin/sed | N/A |
| File opened for reading | /proc/self/stat | /bin/systemctl | N/A |
System Network Configuration Discovery
| Description | Indicator | Process | Target |
| N/A | N/A | /tmp/linux_mips.elf | N/A |
| N/A | N/A | /tmp/linux_mips.elf | N/A |
Processes
/tmp/linux_mips.elf
[/tmp/linux_mips.elf]
/tmp/linux_mips.elf
[/tmp/linux_mips.elf ]
/bin/sh
[/bin/sh -c /etc/32676&]
/usr/sbin/service
[service crond start]
/etc/32676
[/etc/32676]
/usr/bin/basename
[basename /usr/sbin/service]
/bin/sleep
[sleep 60]
/usr/bin/basename
[basename /usr/sbin/service]
/bin/systemctl
[systemctl --quiet is-active multi-user.target]
/bin/systemctl
[systemctl list-unit-files --full --type=socket]
/bin/sed
[sed -ne s/\.socket\s*[a-z]*\s*$/.socket/p]
/bin/systemctl
[systemctl -p Triggers show dbus.socket]
/bin/systemctl
[systemctl -p Triggers show ssh.socket]
/bin/systemctl
[systemctl -p Triggers show syslog.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-fsckd.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-initctl.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-journald-audit.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-journald-dev-log.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-journald.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-networkd.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-rfkill.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-udevd-control.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-udevd-kernel.socket]
/usr/local/sbin/systemctl
[systemctl start crond.service]
/usr/local/bin/systemctl
[systemctl start crond.service]
/usr/sbin/systemctl
[systemctl start crond.service]
/usr/bin/systemctl
[systemctl start crond.service]
/sbin/systemctl
[systemctl start crond.service]
/bin/systemctl
[systemctl start crond.service]
/bin/sh
[/bin/sh -c echo "*/1 * * * * root /.mod " >> /etc/crontab]
/usr/bin/renice
[renice -20 737]
/bin/mount
[mount -o bind /tmp/ /proc/737]
/usr/sbin/service
[service cron start]
/usr/bin/basename
[basename /usr/sbin/service]
/usr/bin/basename
[basename /usr/sbin/service]
/bin/systemctl
[systemctl --quiet is-active multi-user.target]
/bin/systemctl
[systemctl list-unit-files --full --type=socket]
/bin/sed
[sed -ne s/\.socket\s*[a-z]*\s*$/.socket/p]
/bin/systemctl
[systemctl -p Triggers show dbus.socket]
/bin/systemctl
[systemctl -p Triggers show ssh.socket]
/bin/systemctl
[systemctl -p Triggers show syslog.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-fsckd.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-initctl.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-journald-audit.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-journald-dev-log.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-journald.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-networkd.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-rfkill.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-udevd-control.socket]
/bin/systemctl
[systemctl -p Triggers show systemd-udevd-kernel.socket]
/usr/local/sbin/systemctl
[systemctl start cron.service]
/usr/local/bin/systemctl
[systemctl start cron.service]
/usr/sbin/systemctl
[systemctl start cron.service]
/usr/bin/systemctl
[systemctl start cron.service]
/sbin/systemctl
[systemctl start cron.service]
/bin/systemctl
[systemctl start cron.service]
/bin/systemctl
[systemctl start crond.service]
/bin/sleep
[sleep 60]
/bin/sleep
[sleep 60]
Network
| Country | Destination | Domain | Proto |
| AU | 1.1.1.1:53 | www.google.com | udp |
| AU | 1.1.1.1:53 | www.google.com | udp |
| US | 154.40.47.248:888 | tcp |
Files
/etc/.walk
| MD5 | 2eed6ffd6b20736c6771b584cd90c947 |
| SHA1 | aa4770157d68a10c43f185f1292935accef7504a |
| SHA256 | db831bacf5e5f82cbca4da483f12b4c8cef6b47b19ac4b4ca1061d95a3c53e7c |
| SHA512 | 4514199e5fc684f4cbd04facb3f1838928c1726ad4084a8a0cfc373fda0633237b22ee36ed2c2f03ca1aa6fb6fd71194b301eeffb4bd7f5c73d0624a443371f5 |
/etc/.walk
| MD5 | 54cdd87a2c34172249b99a4f1aae4c60 |
| SHA1 | f66841716ec38e63bc6ce04302cd82d5d942f5b5 |
| SHA256 | 181fe8e7f0b277e45eddb6d277bb204ffd93d539a02222f34a1595f02aad94f1 |
| SHA512 | b5f877dae34167191ae4945e0d1db94be9705ecccaed806f5adcc14928dc6be3fceaa0cc04edcbb8127ba8b1a3470c7187a805410dc29e9fddfc5c1cc4a95c13 |
/etc/opt.services.cfg
| MD5 | 5ec2f6c412ccfcc16781a7f3f37fb474 |
| SHA1 | 912cb18493577a0b5c64d994f4b6bc05990ae390 |
| SHA256 | e58dffab271cd20cb6089017017d8e6c5f68c56c2b1877e8a94bbcdadcd4ef4c |
| SHA512 | ce37675e1ccfd0e7fdf2fe155473d94222ceb28cf8a3c797033617a07e7ce632240bdbb338d7c3aec5131a343d172a4d58a05e2558408e42b3eb80cf1767857f |
/etc/32676
| MD5 | 585f408444cbca746945f0cb63f2c3f0 |
| SHA1 | 0e44bae17174f04514e770ca7fc4bec1007e39cd |
| SHA256 | ebb961c647363dfa90f302de378e0e61807b9b792fc86616635a713cca8f4299 |
| SHA512 | 022241dbafad55164701f67ef5b84154e3af97c5dfe77dee7bf8406f2befbd2962bbf4f243432b2f41d6c2376b87fcf551fd6945e03ddb02a5619c2f0f69c596 |
/.mod
| MD5 | f5a3713282e43c200f30342f5ff5e2ea |
| SHA1 | 2b2ce1a207e2b691a074c6f78f71c4785aae426a |
| SHA256 | 6ab64e727571458d4884fb2fe82c27c467db0699cb8f648b3f0217c35d2b7511 |
| SHA512 | 5bcb8cd360409147a486755f90e0cdd97183af02ce8de5135b7c6a8a010deb9ef12dcd5ee9a2a8fd2e159347f68e72d6b7fd75e943b4fcd928d7a74b97476013 |
/usr/bin/include/find
| MD5 | 97b5c6c1b307114efc38193175a343c3 |
| SHA1 | 24015d4f95c6878ea5027c134eddebb7126b610f |
| SHA256 | b1a89f313023b476fc826d8fac689679504e61ae8e650681fb966e810ed34970 |
| SHA512 | e5359f3e082f54f5cfd7afa7771d8724d161d48d09372f203bdca222a47a63919fdfb76b6db7fb8ff61e92f8fd04fdec962e94331ff12705cf53ce5e23d33180 |
/etc/profile.d/gateway.sh
| MD5 | 217d1865cb2770d7650ead8960539181 |
| SHA1 | 5f0f39bd441fa71c36306386d8a81f59480d4e53 |
| SHA256 | fff6d267ac34e86916b0f08ff177c854a20f9353ecd1c3d0250c18fd0b375fa3 |
| SHA512 | f3442829f25e60dc17504619798da502922ea3ab2d92355316e67bd236423e28ed0af8f3d2270b52fe3e7108f5280ea113ec9a03cc1abdc8d6360ecece455d31 |