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Analysis

  • max time kernel
    129s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    21/05/2024, 04:33

General

  • Target

    2024-05-21_22538fcb91c4dc8914300a717054e809_cryptolocker.exe

  • Size

    74KB

  • MD5

    22538fcb91c4dc8914300a717054e809

  • SHA1

    28d2fa3a00e3ae77fd40b75d70aee2112d5e23a7

  • SHA256

    8c7f8922d6ace1b23d9d68b0d6a48e1e720e2d69f963b83f408e02ef7a192bd7

  • SHA512

    e9f3b522c43d6c1d1ab47ed12d79f97a309cd136ecd900278a838345a26e4cb1dd17b4870b2e746582e3ba167dbed0ad5b84465845557df84ff06cd3503ee4fa

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Vu:C4Q2c94OtEvwDpj4H8zR

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • UPX packed file 4 IoCs

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

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies system certificate store 2 TTPs 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-21_22538fcb91c4dc8914300a717054e809_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_22538fcb91c4dc8914300a717054e809_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4472
    • 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:4452

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    74KB

    MD5

    35145cf17ab5f4b73c851aa04c7d0e18

    SHA1

    49c45cc26bd7a1019a505b3d0ac015ae22af3f83

    SHA256

    170a904df3924a1b3bb5822e26ebff19ec1f30ee781c32c82958dc5e61f99532

    SHA512

    b68ab55c4a037850141e5ea94137a4990979ac8358663353736b28fddc1669c5ec94c404711e08c4733484442ea52cdff56e74a0f10724988a9c08d196a731c8

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4452-19-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/4452-25-0x0000000000620000-0x0000000000626000-memory.dmp

    Filesize

    24KB

  • memory/4452-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4472-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4472-1-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/4472-2-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/4472-4-0x0000000000650000-0x0000000000656000-memory.dmp

    Filesize

    24KB

  • memory/4472-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB