Analysis

  • max time kernel
    45s
  • max time network
    45s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    27/04/2024, 20:44

General

  • Target

    Server.exe

  • Size

    37KB

  • MD5

    897835e99a4f3b044a3a788b65e20994

  • SHA1

    7bf5f2cbb3ac82f0af042d09f61ca02acaf29389

  • SHA256

    d12b9712632f295c168fc1ec4dd0748b8e885844ef7d806240d6cdb49170ada2

  • SHA512

    6190a1ed2843419cd44b42ead10c74e6c434156dd1decccf71d34fd1a4be7c7b15ac4099283a089b94b9640cad97720a3833efbff7977fbfdeca6afc7e208432

  • SSDEEP

    768:/jyDSmUbCv/cPCikrE8sIErM+rMRa8NuYOt:/uDObW03wEwn+gRJNX

Score
8/10

Malware Config

Signatures

  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Drops autorun.inf file 1 TTPs 5 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Enumerates physical storage devices 1 TTPs

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

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Server.exe
    "C:\Users\Admin\AppData\Local\Temp\Server.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:3932
    • C:\Users\Admin\AppData\Roaming\svchost.exe
      "C:\Users\Admin\AppData\Roaming\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops autorun.inf file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4276
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Roaming\svchost.exe" "svchost.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:580
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /F /IM Taskmgr.exe
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:1056

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\svchost.exe

    Filesize

    37KB

    MD5

    897835e99a4f3b044a3a788b65e20994

    SHA1

    7bf5f2cbb3ac82f0af042d09f61ca02acaf29389

    SHA256

    d12b9712632f295c168fc1ec4dd0748b8e885844ef7d806240d6cdb49170ada2

    SHA512

    6190a1ed2843419cd44b42ead10c74e6c434156dd1decccf71d34fd1a4be7c7b15ac4099283a089b94b9640cad97720a3833efbff7977fbfdeca6afc7e208432

  • memory/3932-0-0x00000000750D0000-0x0000000075681000-memory.dmp

    Filesize

    5.7MB

  • memory/3932-1-0x0000000001620000-0x0000000001630000-memory.dmp

    Filesize

    64KB

  • memory/3932-2-0x00000000750D0000-0x0000000075681000-memory.dmp

    Filesize

    5.7MB

  • memory/3932-12-0x00000000750D0000-0x0000000075681000-memory.dmp

    Filesize

    5.7MB

  • memory/4276-13-0x00000000750D0000-0x0000000075681000-memory.dmp

    Filesize

    5.7MB

  • memory/4276-23-0x00000000750D0000-0x0000000075681000-memory.dmp

    Filesize

    5.7MB