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Analysis

  • max time kernel
    77s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03/06/2024, 04:34

General

  • Target

    2024-06-03_9d4548d999409ef407db7914acd5e75d_cryptolocker.exe

  • Size

    66KB

  • MD5

    9d4548d999409ef407db7914acd5e75d

  • SHA1

    837ae957e89770392bad0262b605c480f8d589cd

  • SHA256

    6ee6a14d1cabb4b02c90d7bdbe4a92ee90be55882ade675fb9c4be4e5664455b

  • SHA512

    db174c1fad11e6d321380f9e419ed8bb8b60ff550859393f49e352c0b9658effd20134d37060f802668b076a7affed942bde670ec209f2e9bc71ab4e6cce45f3

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2l9tMPvdfGyR5:TCjsIOtEvwDpj5HE/OUHnSMYs

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 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
  • 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\2024-06-03_9d4548d999409ef407db7914acd5e75d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-03_9d4548d999409ef407db7914acd5e75d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3528
    • 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:2216

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    66KB

    MD5

    fcc4c983ad2f22ffeb0c90cb5f09a598

    SHA1

    4129830353663e53b146ac5d59f2088db65126c6

    SHA256

    9622dfad1d0334be4673edf98859f05a336cf7323ca4110e7da297c00afa53bc

    SHA512

    4b8aae409dd72944ae1cb0fc5f35734a2013e1e1afb0d92b533714d8015374dccd152871c5c08ddccc052efa50a4a0641a9ad259ad05b62b3a5ecf6048b39e6c

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2216-19-0x00000000021E0000-0x00000000021E6000-memory.dmp

    Filesize

    24KB

  • memory/2216-20-0x0000000002080000-0x0000000002086000-memory.dmp

    Filesize

    24KB

  • memory/2216-48-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3528-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/3528-1-0x0000000000830000-0x0000000000836000-memory.dmp

    Filesize

    24KB

  • memory/3528-2-0x00000000020F0000-0x00000000020F6000-memory.dmp

    Filesize

    24KB

  • memory/3528-9-0x0000000000830000-0x0000000000836000-memory.dmp

    Filesize

    24KB

  • memory/3528-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB