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Analysis

  • max time kernel
    127s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    14/05/2024, 23:23

General

  • Target

    Surprise for playful boy.scr

  • Size

    265KB

  • MD5

    0aa972fcaa5db5997da928a83fe621cb

  • SHA1

    b38495c73b8e47248a6178beb46784684c8bd2d0

  • SHA256

    f06884e38a06e26f6371523c1ee7bee5970814832bc6bfcca9a515e644b9fd01

  • SHA512

    3d772922e3db741231614a6ccb298db0082f17ec9607f274bcfe653796efcf813bb0da06f3b329331a672e8cb6e5bf56375052fdf4f9bf83d68f26d7b95aca47

  • SSDEEP

    6144:Ona2zAz+I6KcaPVHAuBWSbemainOQ3iAt1FGdX3/0+u76R4/d/3:ONWz1AUZbht1FGdX3c+X+/R

Malware Config

Signatures

  • Modifies WinLogon for persistence 2 TTPs 2 IoCs
  • Modifies firewall policy service 2 TTPs 3 IoCs
  • Modifies security service 2 TTPs 4 IoCs
  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 6 IoCs
  • Disables Task Manager via registry modification
  • ASPack v2.12-2.42 1 IoCs

    Detects executables packed with ASPack v2.12-2.42

  • Drops startup file 4 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • UPX packed file 9 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Windows security modification 2 TTPs 6 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Drops file in Program Files directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs
  • System policy modification 1 TTPs 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Surprise for playful boy.scr
    "C:\Users\Admin\AppData\Local\Temp\Surprise for playful boy.scr" /S
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:1276
    • C:\Users\Admin\AppData\Local\Temp\Surprise for playful boy.scr
      "C:\Users\Admin\AppData\Local\Temp\Surprise for playful boy.scr"
      2⤵
      • Modifies WinLogon for persistence
      • Drops startup file
      • Loads dropped DLL
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2192
      • C:\Users\Admin\AppData\Local\Temp\KVgqzZFL.exe
        "C:\Users\Admin\AppData\Local\Temp\KVgqzZFL.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2996
        • C:\Users\Admin\AppData\Local\Temp\KVgqzZFL.exe
          "C:\Users\Admin\AppData\Local\Temp\KVgqzZFL.exe"
          4⤵
          • Modifies firewall policy service
          • Modifies security service
          • UAC bypass
          • Windows security bypass
          • Drops startup file
          • Executes dropped EXE
          • Windows security modification
          • Adds Run key to start application
          • Checks whether UAC is enabled
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • System policy modification
          PID:2632

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\KVgqzZFL.exe

    Filesize

    265KB

    MD5

    0aa972fcaa5db5997da928a83fe621cb

    SHA1

    b38495c73b8e47248a6178beb46784684c8bd2d0

    SHA256

    f06884e38a06e26f6371523c1ee7bee5970814832bc6bfcca9a515e644b9fd01

    SHA512

    3d772922e3db741231614a6ccb298db0082f17ec9607f274bcfe653796efcf813bb0da06f3b329331a672e8cb6e5bf56375052fdf4f9bf83d68f26d7b95aca47

  • memory/1276-0-0x0000000000400000-0x0000000000466000-memory.dmp

    Filesize

    408KB

  • memory/1276-1-0x0000000000230000-0x0000000000231000-memory.dmp

    Filesize

    4KB

  • memory/1276-61-0x00000000002E0000-0x0000000000346000-memory.dmp

    Filesize

    408KB

  • memory/1276-9-0x0000000000400000-0x0000000000466000-memory.dmp

    Filesize

    408KB

  • memory/2192-11-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2192-46-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2192-12-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2192-6-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2192-4-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2192-13-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2192-24-0x0000000002070000-0x00000000020D6000-memory.dmp

    Filesize

    408KB

  • memory/2192-2-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2192-10-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2192-45-0x0000000000420000-0x00000000005A1000-memory.dmp

    Filesize

    1.5MB

  • memory/2632-42-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2632-48-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2632-53-0x0000000000400000-0x0000000000416000-memory.dmp

    Filesize

    88KB

  • memory/2996-38-0x0000000000400000-0x0000000000466000-memory.dmp

    Filesize

    408KB

  • memory/2996-29-0x0000000000A70000-0x0000000000AD6000-memory.dmp

    Filesize

    408KB

  • memory/2996-26-0x0000000000400000-0x0000000000466000-memory.dmp

    Filesize

    408KB

  • memory/2996-25-0x0000000000400000-0x0000000000466000-memory.dmp

    Filesize

    408KB