Analysis

  • max time kernel
    92s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-05-2024 22:56

General

  • Target

    2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe

  • Size

    74KB

  • MD5

    d32debcb7f540a35f7953fca91b3cb04

  • SHA1

    5340b9a88f65db92e51d2556c647f6d0e82f4442

  • SHA256

    077b1756a81caaa3956d2d89fb712ea71310af5ac32490aaba1e72f09819e028

  • SHA512

    354337905fed340eac9a3afda9a7af66843d4e49e49c9844f2a6dcc324d1c7cc1402f0dc1806192e451633933121c9a02fc570580f75ed4bb4315f7912c04031

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs9Vu:C4Q2c94OtEvwDpj4H8zx

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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-31_d32debcb7f540a35f7953fca91b3cb04_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:396
    • 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:1360

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    74KB

    MD5

    37886bf3e765809ad115a21a97991a2f

    SHA1

    3358f902ea128dc8a53d0c8a44136dadcd3fa119

    SHA256

    bc64567ff0a051edf6f921ebe7ef7e1145c9e9a97b799652b2d7702feb34ad80

    SHA512

    74076a169eb929ee58108e147832355d2fb5d5ea60720770cbe49189b6da3b74bae4ccaa6d516bae5df0325ca63a54b7549e1ae93854c826fc6485c12b4e5c11

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/396-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/396-1-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/396-9-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/396-2-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/396-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1360-19-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1360-21-0x00000000007E0000-0x00000000007E6000-memory.dmp

    Filesize

    24KB

  • memory/1360-50-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB