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Analysis

  • max time kernel
    151s
  • max time network
    69s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    26/11/2022, 11:26

General

  • Target

    100.exe

  • Size

    75KB

  • MD5

    6fe5189a35abb1d99830e92de024bd2d

  • SHA1

    add93a5ad62ff4d923f68661727ea0c37d2053fd

  • SHA256

    9e3ad5186e3784d866a3ed9a41e61a1ff2fbb983ce8edb330a3b069f452b636d

  • SHA512

    7f28b95a47947f75c10763dec5a22fc77b9d249144e24c8de8824dba0dc375729f1b8a4e4aa9faeb3031ee11d1e38afbc167904f5a5061390d896673b414950c

  • SSDEEP

    768:tbyvTDdVf5ozWBYP5SywTwiN9dguJcF4Qhc4VjsS8jAnKNu6LUEscg6U2:tbyvtVRsWyP55wTwiT2hBjsV61nV2

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Modifies Windows Firewall 1 TTPs 1 IoCs
  • Drops startup file 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 13 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\100.exe
    "C:\Users\Admin\AppData\Local\Temp\100.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1960
    • C:\Users\Admin\AppData\Local\Temp\AvastUpdate.exe
      "C:\Users\Admin\AppData\Local\Temp\AvastUpdate.exe"
      2⤵
      • Executes dropped EXE
      • Drops startup file
      • Adds Run key to start application
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1388
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\AppData\Local\Temp\AvastUpdate.exe" "AvastUpdate.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        PID:1468

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

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

    Filesize

    75KB

    MD5

    6fe5189a35abb1d99830e92de024bd2d

    SHA1

    add93a5ad62ff4d923f68661727ea0c37d2053fd

    SHA256

    9e3ad5186e3784d866a3ed9a41e61a1ff2fbb983ce8edb330a3b069f452b636d

    SHA512

    7f28b95a47947f75c10763dec5a22fc77b9d249144e24c8de8824dba0dc375729f1b8a4e4aa9faeb3031ee11d1e38afbc167904f5a5061390d896673b414950c

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

    Filesize

    75KB

    MD5

    6fe5189a35abb1d99830e92de024bd2d

    SHA1

    add93a5ad62ff4d923f68661727ea0c37d2053fd

    SHA256

    9e3ad5186e3784d866a3ed9a41e61a1ff2fbb983ce8edb330a3b069f452b636d

    SHA512

    7f28b95a47947f75c10763dec5a22fc77b9d249144e24c8de8824dba0dc375729f1b8a4e4aa9faeb3031ee11d1e38afbc167904f5a5061390d896673b414950c

  • \Users\Admin\AppData\Local\Temp\AvastUpdate.exe

    Filesize

    75KB

    MD5

    6fe5189a35abb1d99830e92de024bd2d

    SHA1

    add93a5ad62ff4d923f68661727ea0c37d2053fd

    SHA256

    9e3ad5186e3784d866a3ed9a41e61a1ff2fbb983ce8edb330a3b069f452b636d

    SHA512

    7f28b95a47947f75c10763dec5a22fc77b9d249144e24c8de8824dba0dc375729f1b8a4e4aa9faeb3031ee11d1e38afbc167904f5a5061390d896673b414950c

  • memory/1388-63-0x0000000074690000-0x0000000074C3B000-memory.dmp

    Filesize

    5.7MB

  • memory/1388-64-0x0000000074690000-0x0000000074C3B000-memory.dmp

    Filesize

    5.7MB

  • memory/1960-54-0x00000000751A1000-0x00000000751A3000-memory.dmp

    Filesize

    8KB

  • memory/1960-55-0x0000000074690000-0x0000000074C3B000-memory.dmp

    Filesize

    5.7MB

  • memory/1960-56-0x0000000074690000-0x0000000074C3B000-memory.dmp

    Filesize

    5.7MB

  • memory/1960-62-0x0000000074690000-0x0000000074C3B000-memory.dmp

    Filesize

    5.7MB