Analysis

  • max time kernel
    139s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-05-2024 01:03

General

  • Target

    2024-05-02_ab67ab8ba639c0d186bc25172b658fcd_cryptolocker.exe

  • Size

    49KB

  • MD5

    ab67ab8ba639c0d186bc25172b658fcd

  • SHA1

    b7ac26f5be0043a80b2207e51695073bceff699d

  • SHA256

    bbd809dfbbaf98c1cd059ae5f9c0994aaebc8c5fdd9107e3582827bf3ab8ae7b

  • SHA512

    486554fb04693ceb1c9879033a56cf710a605524643e3a66595985e8ddb8f4db04aca1b4a8d2e94082a948c9ca2ec3c8b3ea880b87e8c89b60b3a3ca991cb6cc

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWE6BLbjG9RzhwaN4NO9:xj+VGMOtEvwDpjy+TN4O

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 5 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-02_ab67ab8ba639c0d186bc25172b658fcd_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-02_ab67ab8ba639c0d186bc25172b658fcd_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4396
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:4880

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    49KB

    MD5

    c94cfd1c7b021a184e92ee5fe0417424

    SHA1

    585861c126417c4cdd37391cd5ab7b5b5fdbd572

    SHA256

    1b43778c4624b27e69ee8851dd275f7334ac02d97bbebc1c1bf726a4a497c501

    SHA512

    f26021f43df409ae6307b7e6cdc4147b6d113e5cc7960a0e3d384c9845119c25d7436f9e3769d0a7b7e6c8c901227738a17b9a5c8f40816cf40000f99b63ebd5

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4396-1-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4396-0-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/4396-4-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/4396-9-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/4396-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4880-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4880-20-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4880-26-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4880-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB