Overview

overview

10

Static

static

10

BlackSkull.exe

windows10-1703-x64

10

Analysis

  • max time kernel
    116s
  • max time network
    118s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    30/09/2024, 09:01

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General

  • Target

    BlackSkull.exe

  • Size

    51KB

  • MD5

    4a5798cceb99cd4835aed8314d93244d

  • SHA1

    b6d4d542d091c21484e98f6d6d797b425d072a22

  • SHA256

    5b02c7552b9e97f907dd312a7ce5ddb0e811a9c5c15cf4d6d8a2368a36758465

  • SHA512

    f392ee5e736ae785a7baf67e005d685cb9e587ef4d8eed75af901e06ca4394e3a7d4adc6f6510392f2964fe75daf30b7f2ba44a272554b8e72a70983dd5e9e4a

  • SSDEEP

    768:fpmN6RpwdiEeE0ivOj45N077Mcejchhs1SDdxYu+h7yokbz:fpFpwdcVivOM07MVIhm1SDdxYEokbz

Score
10/10
limeratdiscoveryrat

Malware Config

Extracted

Family

limerat

Attributes
  • aes_key

    123499

  • antivm

    false

  • c2_url

    https://pastebin.com/raw/ZJ0Dhft2

  • delay

    3

  • download_payload

    false

  • install

    true

  • install_name

    WindowsServices.exe

  • main_folder

    Temp

  • pin_spread

    false

  • sub_folder

    \

  • usb_spread

    false

Extracted

Family

limerat

Attributes
  • antivm

    false

  • c2_url

    https://pastebin.com/raw/ZJ0Dhft2

  • download_payload

    false

  • install

    false

  • pin_spread

    false

  • usb_spread

    false

Signatures

  • LimeRAT

    Simple yet powerful RAT for Windows machines written in .NET.

    ratlimerat
  • Executes dropped EXE 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of FindShellTrayWindow 37 IoCs
  • Suspicious use of SendNotifyMessage 37 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BlackSkull.exe
    "C:\Users\Admin\AppData\Local\Temp\BlackSkull.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4444
    • C:\Windows\SysWOW64\schtasks.exe
      schtasks /create /f /sc ONLOGON /RL HIGHEST /tn LimeRAT-Admin /tr "'C:\Users\Admin\AppData\Local\Temp\WindowsServices.exe'"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3588
    • C:\Users\Admin\AppData\Local\Temp\WindowsServices.exe
      "C:\Users\Admin\AppData\Local\Temp\WindowsServices.exe"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2544
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Drops file in Windows directory
    • Checks SCSI registry key(s)
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1712

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\WindowsServices.exe
          Filesize

          51KB

          MD5

          4a5798cceb99cd4835aed8314d93244d

          SHA1

          b6d4d542d091c21484e98f6d6d797b425d072a22

          SHA256

          5b02c7552b9e97f907dd312a7ce5ddb0e811a9c5c15cf4d6d8a2368a36758465

          SHA512

          f392ee5e736ae785a7baf67e005d685cb9e587ef4d8eed75af901e06ca4394e3a7d4adc6f6510392f2964fe75daf30b7f2ba44a272554b8e72a70983dd5e9e4a

          Download Submit

        • memory/2544-13-0x0000000073390000-0x0000000073A7E000-memory.dmp

          Filesize

          6.9MB

          Download

        • memory/2544-14-0x0000000073390000-0x0000000073A7E000-memory.dmp

          Filesize

          6.9MB

          Download

        • memory/2544-15-0x0000000073390000-0x0000000073A7E000-memory.dmp

          Filesize

          6.9MB

          Download

        • memory/2544-16-0x0000000073390000-0x0000000073A7E000-memory.dmp

          Filesize

          6.9MB

          Download

        • memory/4444-0-0x000000007339E000-0x000000007339F000-memory.dmp

          Filesize

          4KB

          Download

        • memory/4444-1-0x0000000000060000-0x0000000000072000-memory.dmp

          Filesize

          72KB

          Download

        • memory/4444-2-0x00000000048C0000-0x000000000495C000-memory.dmp

          Filesize

          624KB

          Download

        • memory/4444-3-0x0000000004960000-0x00000000049C6000-memory.dmp

          Filesize

          408KB

          Download

        • memory/4444-4-0x0000000073390000-0x0000000073A7E000-memory.dmp

          Filesize

          6.9MB

          Download

        • memory/4444-5-0x00000000054B0000-0x00000000059AE000-memory.dmp

          Filesize

          5.0MB

          Download

        • memory/4444-12-0x0000000073390000-0x0000000073A7E000-memory.dmp

          Filesize

          6.9MB

          Download