Analysis Overview
SHA256
b0d15ae15ddea91eba49906e03e65787613fcad8b190190dfde9f3cf62ee2be3
Threat Level: Known bad
The file linux_mipsel_softfloat.elf was found to be: Known bad.
Malicious Activity Summary
Kaiji family
Kaiji
kaiji_chaosbot
Modifies Watchdog functionality
Executes dropped EXE
Enumerates running processes
Modifies init.d
Modifies systemd
Reads CPU attributes
Reads runtime system information
Enumerates kernel/hardware configuration
System Network Configuration Discovery
GoLang User-Agent
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-11-04 16:27
Signatures
Kaiji
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Kaiji family
kaiji_chaosbot
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-11-04 16:27
Reported
2024-11-04 16:29
Platform
debian12-mipsel-20240729-en
Max time kernel
153s
Max time network
160s
Command Line
Signatures
Executes dropped EXE
| Description | Indicator | Process | Target |
| N/A | /etc/32678 | /etc/32678 | N/A |
| N/A | /etc/id.services.conf | /etc/id.services.conf | N/A |
| N/A | /etc/id.services.conf | /etc/id.services.conf | N/A |
| N/A | /etc/32678 | /etc/32678 | N/A |
Modifies Watchdog functionality
| Description | Indicator | Process | Target |
| File opened for modification | /dev/watchdog | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for modification | /dev/misc/watchdog | /tmp/linux_mipsel_softfloat.elf | N/A |
Enumerates running processes
Modifies init.d
| Description | Indicator | Process | Target |
| File opened for modification | /etc/init.d/linux_kill | /tmp/linux_mipsel_softfloat.elf | N/A |
Modifies systemd
| Description | Indicator | Process | Target |
| File opened for modification | /usr/lib/systemd/system/linux.service | /tmp/linux_mipsel_softfloat.elf | N/A |
Reads CPU attributes
| Description | Indicator | Process | Target |
| File opened for reading | /sys/devices/system/cpu/possible | /usr/bin/pkill | N/A |
Enumerates kernel/hardware configuration
| Description | Indicator | Process | Target |
| File opened for reading | /sys/kernel/mm/transparent_hugepage/hpage_pmd_size | /etc/id.services.conf | N/A |
| File opened for reading | /sys/kernel/mm/transparent_hugepage/hpage_pmd_size | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /sys/kernel/mm/transparent_hugepage/hpage_pmd_size | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /sys/kernel/mm/transparent_hugepage/hpage_pmd_size | /etc/id.services.conf | N/A |
| File opened for reading | /sys/devices/system/node | /usr/bin/pkill | N/A |
Reads runtime system information
| Description | Indicator | Process | Target |
| File opened for reading | /proc/839/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/5/status | /usr/bin/pkill | N/A |
| File opened for reading | /proc/6/status | /usr/bin/pkill | N/A |
| File opened for reading | /proc/31/stat | /usr/bin/pkill | N/A |
| File opened for reading | /proc/115/stat | /usr/bin/pkill | N/A |
| File opened for reading | /proc/384/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/823/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/830/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/44/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/367/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/872/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/779/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/30/status | /usr/bin/pkill | N/A |
| File opened for reading | /proc/138/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/868/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/803/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/113/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/sys/kernel/cap_last_cap | /usr/sbin/ausearch | N/A |
| File opened for reading | /proc/53/status | /usr/bin/pkill | N/A |
| File opened for reading | /proc/19/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/23/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/119/status | /usr/bin/pkill | N/A |
| File opened for reading | /proc/119/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/sys/kernel/cap_last_cap | /usr/bin/journalctl | N/A |
| File opened for reading | /proc/384/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/10/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/11/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/20/stat | /usr/bin/pkill | N/A |
| File opened for reading | /proc/24/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/59/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/9/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/6/stat | /usr/bin/pkill | N/A |
| File opened for reading | /proc/27/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/677/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/1/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/1/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/23/status | /usr/bin/pkill | N/A |
| File opened for reading | /proc/117/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/391/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/392/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/4/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/14/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/681/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/19/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/30/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/9/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/48/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/58/stat | /usr/bin/pkill | N/A |
| File opened for reading | /proc/10/status | /usr/bin/pkill | N/A |
| File opened for reading | /proc/33/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/682/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/6/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/115/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/204/status | /usr/bin/pkill | N/A |
| File opened for reading | /proc/852/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/9/ctty | /usr/bin/pkill | N/A |
| File opened for reading | /proc/368/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/699/cgroup | /usr/bin/pkill | N/A |
| File opened for reading | /proc/59/cmdline | /usr/bin/pkill | N/A |
| File opened for reading | /proc/48/stat | /usr/bin/pkill | N/A |
| File opened for reading | /proc/412/stat | /usr/bin/pkill | N/A |
| File opened for reading | /proc/884/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/838/stat | /tmp/linux_mipsel_softfloat.elf | N/A |
| File opened for reading | /proc/47/status | /usr/bin/pkill | N/A |
System Network Configuration Discovery
| Description | Indicator | Process | Target |
| N/A | N/A | /tmp/linux_mipsel_softfloat.elf | N/A |
| N/A | N/A | /tmp/linux_mipsel_softfloat.elf | N/A |
GoLang User-Agent
| Description | Indicator | Process | Target |
| HTTP User-Agent header | Go-http-client/1.1 | N/A | N/A |
Processes
/tmp/linux_mipsel_softfloat.elf
[/tmp/linux_mipsel_softfloat.elf]
/usr/bin/sh
[sh -c /etc/32678&]
/usr/sbin/service
[service crond start]
/tmp/linux_mipsel_softfloat.elf
[/tmp/linux_mipsel_softfloat.elf ]
/etc/32678
[/etc/32678]
/usr/bin/basename
[basename /usr/sbin/service]
/usr/bin/basename
[basename /usr/sbin/service]
/usr/bin/sleep
[sleep 60]
/usr/bin/systemctl
[systemctl list-unit-files --full --type=socket]
/usr/bin/sed
[sed -ne s/\.socket\s*[a-z]*\s*$/.socket/p]
/usr/sbin/update-rc.d
[update-rc.d linux_kill defaults]
/usr/local/sbin/systemctl
[systemctl daemon-reload]
/usr/local/bin/systemctl
[systemctl daemon-reload]
/usr/sbin/systemctl
[systemctl daemon-reload]
/usr/bin/systemctl
[systemctl daemon-reload]
/usr/local/sbin/systemctl
[systemctl start crond.service]
/usr/local/bin/systemctl
[systemctl start crond.service]
/usr/sbin/systemctl
[systemctl start crond.service]
/usr/bin/systemctl
[systemctl start crond.service]
/usr/bin/sh
[sh -c cd /boot;systemctl daemon-reload;systemctl enable linux.service;systemctl start linux.service;journalctl -xe --no-pager]
/usr/bin/systemctl
[systemctl daemon-reload]
/usr/bin/systemctl
[systemctl enable linux.service]
/etc/id.services.conf
[/etc/id.services.conf]
/usr/bin/pkill
[pkill -9 32678]
/usr/bin/sh
[sh -c /etc/32678&]
/usr/sbin/service
[service crond start]
/etc/id.services.conf
[/etc/id.services.conf ]
/etc/32678
[/etc/32678]
/usr/bin/basename
[basename /usr/sbin/service]
/usr/bin/sleep
[sleep 60]
/usr/bin/basename
[basename /usr/sbin/service]
/usr/bin/systemctl
[systemctl list-unit-files --full --type=socket]
/usr/bin/sed
[sed -ne s/\.socket\s*[a-z]*\s*$/.socket/p]
/usr/bin/systemctl
[systemctl start linux.service]
/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]
/usr/bin/journalctl
[journalctl -xe --no-pager]
/usr/bin/sh
[sh -c cd /boot;ausearch -c 'System.img.conf' --raw | audit2allow -M my-Systemimgconf;semodule -X 300 -i my-Systemimgconf.pp]
/usr/bin/audit2allow
[audit2allow -M my-Systemimgconf]
/usr/sbin/ausearch
[ausearch -c System.img.conf --raw]
Network
| Country | Destination | Domain | Proto |
| US | 1.1.1.1:53 | www.google.com | udp |
| US | 1.1.1.1:53 | www.google.com | udp |
| US | 1.1.1.1:53 | 78789.dns.army | udp |
| US | 1.1.1.1:53 | 78789.dns.army | udp |
| HK | 154.12.82.11:7850 | 78789.dns.army | tcp |
| US | 1.1.1.1:53 | debian12-mipsel-20240729-en-8 | udp |
| US | 1.1.1.1:53 | debian12-mipsel-20240729-en-8 | udp |
| US | 1.1.1.1:53 | debian12-mipsel-20240729-en-8 | udp |
| US | 1.1.1.1:53 | debian12-mipsel-20240729-en-8 | udp |
| HK | 154.12.82.11:808 | 78789.dns.army | tcp |
| N/A | 10.127.0.1:22 | tcp | |
| N/A | 10.127.0.3:22 | tcp | |
| N/A | 10.127.0.2:22 | tcp | |
| N/A | 10.127.0.5:22 | tcp | |
| N/A | 10.127.0.4:22 | tcp | |
| N/A | 10.127.0.7:22 | tcp | |
| N/A | 10.127.0.10:22 | tcp | |
| N/A | 10.127.0.9:22 | tcp | |
| N/A | 10.127.0.8:22 | tcp | |
| N/A | 10.127.0.6:22 | tcp | |
| N/A | 10.127.0.12:22 | tcp | |
| N/A | 10.127.0.15:22 | tcp | |
| N/A | 10.127.0.14:22 | tcp | |
| N/A | 10.127.0.11:22 | tcp | |
| N/A | 10.127.0.13:22 | tcp | |
| N/A | 10.127.0.18:22 | tcp | |
| N/A | 10.127.0.20:22 | tcp | |
| N/A | 10.127.0.19:22 | tcp | |
| N/A | 10.127.0.17:22 | tcp | |
| N/A | 10.127.0.16:22 | tcp | |
| N/A | 10.127.0.23:22 | tcp | |
| N/A | 10.127.0.21:22 | tcp | |
| N/A | 10.127.0.25:22 | tcp | |
| N/A | 10.127.0.22:22 | tcp | |
| N/A | 10.127.0.24:22 | tcp | |
| N/A | 10.127.0.27:22 | tcp | |
| N/A | 10.127.0.30:22 | tcp | |
| N/A | 10.127.0.28:22 | tcp | |
| N/A | 10.127.0.29:22 | tcp | |
| N/A | 10.127.0.34:22 | tcp | |
| N/A | 10.127.0.33:22 | tcp | |
| N/A | 10.127.0.32:22 | tcp | |
| N/A | 10.127.0.31:22 | tcp | |
| N/A | 10.127.0.36:22 | tcp | |
| N/A | 10.127.0.37:22 | tcp | |
| N/A | 10.127.0.38:22 | tcp | |
| N/A | 10.127.0.35:22 | tcp | |
| N/A | 10.127.0.41:22 | tcp | |
| N/A | 10.127.0.40:22 | tcp | |
| N/A | 10.127.0.42:22 | tcp | |
| N/A | 10.127.0.39:22 | tcp | |
| N/A | 10.127.0.45:22 | tcp | |
| N/A | 10.127.0.46:22 | tcp | |
| N/A | 10.127.0.44:22 | tcp | |
| N/A | 10.127.0.43:22 | tcp | |
| N/A | 10.127.0.50:22 | tcp | |
| N/A | 10.127.0.49:22 | tcp | |
| N/A | 10.127.0.48:22 | tcp | |
| N/A | 10.127.0.47:22 | tcp | |
| N/A | 10.127.0.52:22 | tcp | |
| N/A | 10.127.0.51:22 | tcp | |
| N/A | 10.127.0.53:22 | tcp | |
| N/A | 10.127.0.54:22 | tcp | |
| N/A | 10.127.0.57:22 | tcp | |
| N/A | 10.127.0.58:22 | tcp | |
| N/A | 10.127.0.59:22 | tcp | |
| N/A | 10.127.0.56:22 | tcp | |
| N/A | 10.127.0.55:22 | tcp | |
| N/A | 10.127.0.62:22 | tcp | |
| N/A | 10.127.0.60:22 | tcp | |
| N/A | 10.127.0.63:22 | tcp | |
| N/A | 10.127.0.61:22 | tcp | |
| N/A | 10.127.0.64:22 | tcp | |
| N/A | 10.127.0.65:22 | tcp | |
| N/A | 10.127.0.67:22 | tcp | |
| N/A | 10.127.0.68:22 | tcp | |
| N/A | 10.127.0.66:22 | tcp | |
| N/A | 10.127.0.69:22 | tcp | |
| N/A | 10.127.0.73:22 | tcp | |
| N/A | 10.127.0.71:22 | tcp | |
| N/A | 10.127.0.72:22 | tcp | |
| N/A | 10.127.0.70:22 | tcp | |
| N/A | 10.127.0.74:22 | tcp | |
| N/A | 10.127.0.76:22 | tcp | |
| N/A | 10.127.0.77:22 | tcp | |
| N/A | 10.127.0.78:22 | tcp | |
| N/A | 10.127.0.75:22 | tcp | |
| N/A | 10.127.0.79:22 | tcp | |
| N/A | 10.127.0.80:22 | tcp | |
| N/A | 10.127.0.81:22 | tcp | |
| N/A | 10.127.0.82:22 | tcp | |
| N/A | 10.127.0.83:22 | tcp | |
| N/A | 10.127.0.84:22 | tcp | |
| N/A | 10.127.0.88:22 | tcp | |
| N/A | 10.127.0.89:22 | tcp | |
| N/A | 10.127.0.85:22 | tcp | |
| N/A | 10.127.0.87:22 | tcp | |
| N/A | 10.127.0.86:22 | tcp | |
| N/A | 10.127.0.91:22 | tcp | |
| N/A | 10.127.0.94:22 | tcp | |
| N/A | 10.127.0.90:22 | tcp | |
| N/A | 10.127.0.93:22 | tcp | |
| N/A | 10.127.0.92:22 | tcp | |
| N/A | 10.127.0.95:22 | tcp | |
| N/A | 10.127.0.97:22 | tcp | |
| N/A | 10.127.0.98:22 | tcp | |
| N/A | 10.127.0.99:22 | tcp | |
| N/A | 10.127.0.96:22 | tcp | |
| N/A | 10.127.0.100:22 | tcp | |
| N/A | 10.127.0.102:22 | tcp | |
| N/A | 10.127.0.103:22 | tcp | |
| N/A | 10.127.0.101:22 | tcp | |
| N/A | 10.127.0.104:22 | tcp | |
| N/A | 10.127.0.105:22 | tcp | |
| N/A | 10.127.0.109:22 | tcp | |
| N/A | 10.127.0.106:22 | tcp | |
| N/A | 10.127.0.107:22 | tcp | |
| N/A | 10.127.0.108:22 | tcp | |
| N/A | 10.127.0.110:22 | tcp | |
| N/A | 10.127.0.111:22 | tcp | |
| N/A | 10.127.0.114:22 | tcp | |
| N/A | 10.127.0.113:22 | tcp | |
| N/A | 10.127.0.112:22 | tcp | |
| N/A | 10.127.0.115:22 | tcp | |
| N/A | 10.127.0.116:22 | tcp | |
| N/A | 10.127.0.119:22 | tcp | |
| N/A | 10.127.0.117:22 | tcp | |
| N/A | 10.127.0.118:22 | tcp | |
| N/A | 10.127.0.120:22 | tcp | |
| N/A | 10.127.0.123:22 | tcp | |
| N/A | 10.127.0.121:22 | tcp | |
| N/A | 10.127.0.124:22 | tcp | |
| N/A | 10.127.0.122:22 | tcp | |
| N/A | 10.127.0.125:22 | tcp | |
| N/A | 10.127.0.128:22 | tcp | |
| N/A | 10.127.0.129:22 | tcp | |
| N/A | 10.127.0.126:22 | tcp | |
| N/A | 10.127.0.127:22 | tcp | |
| N/A | 10.127.0.130:22 | tcp | |
| N/A | 10.127.0.133:22 | tcp | |
| N/A | 10.127.0.132:22 | tcp | |
| N/A | 10.127.0.131:22 | tcp | |
| N/A | 10.127.0.134:22 | tcp | |
| N/A | 10.127.0.135:22 | tcp | |
| N/A | 10.127.0.139:22 | tcp | |
| N/A | 10.127.0.137:22 | tcp | |
| N/A | 10.127.0.138:22 | tcp | |
| N/A | 10.127.0.136:22 | tcp | |
| N/A | 10.127.0.140:22 | tcp | |
| N/A | 10.127.0.144:22 | tcp | |
| N/A | 10.127.0.142:22 | tcp | |
| N/A | 10.127.0.143:22 | tcp | |
| N/A | 10.127.0.141:22 | tcp | |
| N/A | 10.127.0.145:22 | tcp | |
| N/A | 10.127.0.146:22 | tcp | |
| N/A | 10.127.0.148:22 | tcp | |
| N/A | 10.127.0.147:22 | tcp | |
| N/A | 10.127.0.149:22 | tcp | |
| N/A | 10.127.0.150:22 | tcp | |
| N/A | 10.127.0.153:22 | tcp | |
| N/A | 10.127.0.151:22 | tcp | |
| N/A | 10.127.0.154:22 | tcp | |
| N/A | 10.127.0.152:22 | tcp | |
| N/A | 10.127.0.155:22 | tcp | |
| N/A | 10.127.0.157:22 | tcp | |
| N/A | 10.127.0.159:22 | tcp | |
| N/A | 10.127.0.156:22 | tcp | |
| N/A | 10.127.0.158:22 | tcp | |
| N/A | 10.127.0.160:22 | tcp | |
| N/A | 10.127.0.162:22 | tcp | |
| N/A | 10.127.0.163:22 | tcp | |
| N/A | 10.127.0.164:22 | tcp | |
| N/A | 10.127.0.161:22 | tcp | |
| N/A | 10.127.0.165:22 | tcp | |
| N/A | 10.127.0.170:22 | tcp | |
| N/A | 10.127.0.167:22 | tcp | |
| N/A | 10.127.0.168:22 | tcp | |
| N/A | 10.127.0.166:22 | tcp | |
| N/A | 10.127.0.169:22 | tcp | |
| N/A | 10.127.0.174:22 | tcp | |
| N/A | 10.127.0.172:22 | tcp | |
| N/A | 10.127.0.173:22 | tcp | |
| N/A | 10.127.0.171:22 | tcp | |
| N/A | 10.127.0.175:22 | tcp | |
| N/A | 10.127.0.176:22 | tcp | |
| N/A | 10.127.0.177:22 | tcp | |
| N/A | 10.127.0.178:22 | tcp | |
| N/A | 10.127.0.179:22 | tcp | |
| N/A | 10.127.0.180:22 | tcp | |
| N/A | 10.127.0.184:22 | tcp | |
| N/A | 10.127.0.181:22 | tcp |
Files
/etc/32678
| MD5 | 768eaf287796da19e1cf5e0b2fb1b161 |
| SHA1 | 6a1ce2ee5ccc86d1f33806feb14547b35290df2a |
| SHA256 | 1d22620dfb2a6715e5d745aed5cf841ede0e75e1747f12b9b925a2d346bc7ecb |
| SHA512 | e6af30c9df4f7f47696069511e64ecbc8e841629d692ee4056503df3533fb7a7a74960698826260355e1dba7b6c562482a27a39bb51a4237473ce4b68472d620 |
/etc/init.d/linux_kill
| MD5 | 3909975f7cc0d1121c1819b800069f31 |
| SHA1 | 3e68de708c2e6c40fab6794afdee3104e5590189 |
| SHA256 | 6876dac71f13a068afb863d257134275f2edba43b2acaf4924fabf97c079070b |
| SHA512 | 50600cceeb03b05f45ae61d890caee9f51ff390b6776930866e527e071d65d08241fc66673fd9b99d62fbc77d3c00fc3de4d7378cbc42f5daba5d83072b0906e |
/usr/lib/systemd/system/linux.service
| MD5 | d80ccc7ced99538f22336f2ec0249087 |
| SHA1 | be4de9f604e065b53076a3d7ba702fe98c6b8746 |
| SHA256 | 0dc3e8552c3e6217e0dc7fd440c7ba4c9cd6e676ce2561e4f71949d2783ae968 |
| SHA512 | d798e6516571fcd03bdffbd5405f320fb23422ceb563901658efa4101b4568eabc27730f40c0bcf6dde5509f01ba6965dd61f64675dad695924f1dea1746e6de |