Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-05-2024 00:38

General

  • Target

    2024-05-02_40235881e44ee15700f6f5ca129e95ff_cryptolocker.exe

  • Size

    71KB

  • MD5

    40235881e44ee15700f6f5ca129e95ff

  • SHA1

    42a3b5130f5ef7f20514efd4075ca78e72c30d41

  • SHA256

    e72214ad43d569868245c1c199e75610f1ec6b558f83812aa8419439ab8f1e79

  • SHA512

    c5c75a81f87d7883cb4230528f5d651040a544e0c535ec346aed0635b6edc7a4adebd8d275dbb35a9aff73639d366bcd664837ec41b2f6103fd0e2aba6ad1aa9

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs94:C4Q2c94OtEvwDpj4H8zh

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 5 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\2024-05-02_40235881e44ee15700f6f5ca129e95ff_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-02_40235881e44ee15700f6f5ca129e95ff_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2368
    • 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:4296

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    71KB

    MD5

    1c5b208cc63dd510f87858c4410d6369

    SHA1

    bc6f80a7d74bce85fc21fd9781425113c741a916

    SHA256

    87a43d38685d84f0c122432a3b397327ad42830da48da6d824c327d8e4e860f9

    SHA512

    86a63308e33f40ccc3c5c27e4bea363423fd590e8a7b326af2c3bfe4b10ed8ae0ffe95b26c49725289fe31f74bb334390dc6c74dc2d41a09a90b5cda57007faf

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2368-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2368-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2368-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/2368-3-0x0000000000590000-0x0000000000596000-memory.dmp

    Filesize

    24KB

  • memory/2368-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4296-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4296-20-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/4296-26-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/4296-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB