General
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Target
linux_arm5.elf
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Size
2.0MB
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Sample
250420-prt4caymt6
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MD5
1d97cd7f9c94a0e92606e8f5bf922bbf
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SHA1
5f2c274b638f3fde2c9959190565a2193076626d
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SHA256
def144637e9c3a244a8274f683700b8b4784dc490b6b2bb645d6c3937fccc173
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SHA512
2618d70d92e21c30f010611cf33ecf8040659601c6b6436d00146749493263bfb5a9dc6e54338b7bcf05a31da45c5b3f090e5b6d9ece34a2a9adf0b83c94e636
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SSDEEP
24576:NmGM05U6zdl5megDmMTwJCmxjZthdwpVQsl6nBVSDr21p27DCcStHXHVhSBPnjKm:N/bNmer12T1
Behavioral task
behavioral1
Sample
linux_arm5.elf
Resource
debian12-armhf-20240418-en
Malware Config
Extracted
kaiji
154.201.91.52:888
Targets
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Target
linux_arm5.elf
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Size
2.0MB
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MD5
1d97cd7f9c94a0e92606e8f5bf922bbf
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SHA1
5f2c274b638f3fde2c9959190565a2193076626d
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SHA256
def144637e9c3a244a8274f683700b8b4784dc490b6b2bb645d6c3937fccc173
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SHA512
2618d70d92e21c30f010611cf33ecf8040659601c6b6436d00146749493263bfb5a9dc6e54338b7bcf05a31da45c5b3f090e5b6d9ece34a2a9adf0b83c94e636
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SSDEEP
24576:NmGM05U6zdl5megDmMTwJCmxjZthdwpVQsl6nBVSDr21p27DCcStHXHVhSBPnjKm:N/bNmer12T1
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Renames multiple (1004) files with added filename extension
This suggests ransomware activity of encrypting all the files on the system.
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Executes dropped EXE
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Modifies Watchdog functionality
Malware like Mirai modifies the Watchdog to prevent it restarting an infected system.
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Creates/modifies Cron job
Cron allows running tasks on a schedule, and is commonly used for malware persistence.
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Creates/modifies environment variables
Creating/modifying environment variables is a common persistence mechanism.
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Modifies systemd
Adds/ modifies systemd service files. Likely to achieve persistence.
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Write file to user bin folder
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Modifies Bash startup script
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MITRE ATT&CK Enterprise v16
Execution
Command and Scripting Interpreter
1Unix Shell
1Scheduled Task/Job
1Cron
1Persistence
Boot or Logon Autostart Execution
3XDG Autostart Entries
1Boot or Logon Initialization Scripts
1RC Scripts
1Create or Modify System Process
1Systemd Service
1Event Triggered Execution
1Unix Shell Configuration Modification
1Hijack Execution Flow
1Path Interception by PATH Environment Variable
1Scheduled Task/Job
1Cron
1Privilege Escalation
Boot or Logon Autostart Execution
3XDG Autostart Entries
1Boot or Logon Initialization Scripts
1RC Scripts
1Create or Modify System Process
1Systemd Service
1Event Triggered Execution
1Unix Shell Configuration Modification
1Hijack Execution Flow
1Path Interception by PATH Environment Variable
1Scheduled Task/Job
1Cron
1