Analysis

  • max time kernel
    93s
  • max time network
    127s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-03-2024 11:43

General

  • Target

    2024-03-28_8ca4adf9ed68e48a35c6fdb65609bdd1_cryptolocker.exe

  • Size

    127KB

  • MD5

    8ca4adf9ed68e48a35c6fdb65609bdd1

  • SHA1

    46c8ccd096da25bd81ac3c9134bb7f6e4895cd39

  • SHA256

    34fcadf9eb0fecfc9abd808e2ecc68ccb50e45fa354e885f56f16a49c8795cb8

  • SHA512

    0a84c8d0a90a51378483813886e7eb4998fb619da5745c62360fa17d433122b908c5bc8b92c3e28b63d9fd55f26d3b6b066e66541ecc171afabb3795c6865de0

  • SSDEEP

    1536:gUj+AIMOtEvwDpjNbwQEIPlemUhYwkkxGBp2:vCA9OtEvwDpjS

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-03-28_8ca4adf9ed68e48a35c6fdb65609bdd1_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_8ca4adf9ed68e48a35c6fdb65609bdd1_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5072
    • 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:4144

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    127KB

    MD5

    1de9bc1df048dd868b88e3a115613aae

    SHA1

    cf0ee3f18b990285fd6d652d331281209efc72c0

    SHA256

    313ea6a248e81a9da5adfe274f9dbf9bb7032fa4f84324135cc6aba7520bd66e

    SHA512

    ae375e630fe644f0aeead9dd16b0a7c86b62f57c9151ce85909d30802f1a76296ae6f5f6ecbfca4c44db277c556494d242cadc118578f3ca820d97a7282a2818

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4144-17-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/5072-0-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/5072-2-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/5072-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB