Analysis

  • max time kernel
    135s
  • max time network
    146s
  • 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 19:43

General

  • Target

    2024-05-21_ef42efc4045359c45c393a769236d11f_cryptolocker.exe

  • Size

    83KB

  • MD5

    ef42efc4045359c45c393a769236d11f

  • SHA1

    e8097f25d9489c23b7537a0ed48702a95fecf402

  • SHA256

    ef3b58f7ea061404844b45b1a69e9f8355f7335f5c8292848a5103705718e071

  • SHA512

    1f9db301ff15b8543f4e50c033e97b387de20591278c2a05e730639276b0e67ac753dcc5fe7c477c6d767459ba999e365cf8d887d316cfce894b74933ee7afcd

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMrpZ:TCjsIOtEvwDpj5HE/OUHnSM9

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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\2024-05-21_ef42efc4045359c45c393a769236d11f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-21_ef42efc4045359c45c393a769236d11f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5008
    • 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:2936

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    84KB

    MD5

    aebcd67490da3fc9cc8ef63a32d456a0

    SHA1

    5c42e8db75fd6b877c1910937c15083fca37696e

    SHA256

    ede3d32b1a67db7706133599e1713a93888574f5c8a05629839e060a45eac7f5

    SHA512

    d38789da212c85558e3950ab20a4713a8d9c739104062df64b8aeabe2ff7735ddc12a448f9358a0bf002c89d8a385fe975f49b42ead21b4b732539acbac8f014

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2936-16-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/2936-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/2936-21-0x0000000000520000-0x0000000000526000-memory.dmp

    Filesize

    24KB

  • memory/2936-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/5008-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/5008-1-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/5008-3-0x0000000000750000-0x0000000000756000-memory.dmp

    Filesize

    24KB

  • memory/5008-9-0x0000000000730000-0x0000000000736000-memory.dmp

    Filesize

    24KB

  • memory/5008-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB