Analysis

  • max time kernel
    88s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231222-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/01/2024, 04:36

General

  • Target

    2024-01-25_6cdd8d099f3059625422e15524f4e949_cryptolocker.exe

  • Size

    50KB

  • MD5

    6cdd8d099f3059625422e15524f4e949

  • SHA1

    5f4c1fffacb52b95ac2cf2628b31bcd23ccc1521

  • SHA256

    aef493dffccea0a991e2addff27d30079574965ceee199c7576738237ac8d6a1

  • SHA512

    b8cdfb7753d53059f1c5dda2ae7538c612c30d292e9bff176b33475fd14521d0884ec3dc2e818e63c534579a6c648c21501a834d55b41cf6df372e5e4bc3e595

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4/Uth8igNrr42A7n0Fmy7dR:vj+jsMQMOtEvwDpj5HczerLO04y7dR

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\2024-01-25_6cdd8d099f3059625422e15524f4e949_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_6cdd8d099f3059625422e15524f4e949_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2400
    • 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:4760

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    50KB

    MD5

    b46e2207269b0f97060977e597560cc4

    SHA1

    94dce20e27ba76a546938cb4fa90c797296ebdfa

    SHA256

    591be089e36f0db43773ee962fc01536e0d5cf4d627ea7e11e4457507b63c746

    SHA512

    a8c5ba51f8d2d5910648e6fea5cf6b2787936e5f6c97b694bb2a5b040be126847b85b10c195a3f31e29d978c1df8475cc0a2a601f2ab78ae12800b22cc5ca299

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2400-1-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2400-0-0x00000000005B0000-0x00000000005B6000-memory.dmp

    Filesize

    24KB

  • memory/2400-2-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/4760-17-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4760-23-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB