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Analysis

  • max time kernel
    149s
  • 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
    25/05/2024, 22:52

General

  • Target

    2024-05-25_33d65d21a01a6f3261c2e5ea1bcfc4f8_cryptolocker.exe

  • Size

    62KB

  • MD5

    33d65d21a01a6f3261c2e5ea1bcfc4f8

  • SHA1

    73aae12177aed6ddeace0e8524c1895879d492a6

  • SHA256

    27ce3426a3f0af9df8a3c1689f609e114ca66ecd2d3b34eb74f71a1e9fdfc46a

  • SHA512

    f35676e23672e4da32b419f1bf29dc999ae1eaff84e8184b5d792bc216c5f29833752255f00f9241d2dd5b0ca2b0409cc42e714f4c9c504f3d7c9ff641117117

  • SSDEEP

    768:xQz7yVEhs9+4uR1bytOOtEvwDpjWfbZgBh8i6g7GoFwD4:xj+VGMOtEvwDpjubEgywk

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 IoCs
  • Detects executables built or packed with MPress PE compressor 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 10 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-25_33d65d21a01a6f3261c2e5ea1bcfc4f8_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-25_33d65d21a01a6f3261c2e5ea1bcfc4f8_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4516
    • 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:4576

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    ffe672783b2787d552183ce351f16a7b

    SHA1

    0c53dd0ffa2bf652eb1cda21d678ff03d35314b0

    SHA256

    ebf066371291a1849bbf485822b0e6526c875be46dea55e63bb846b6367fa5d1

    SHA512

    8c0c4dfbee991f95975b65e48740d1810903d824b5ceb52d4b95175f747e7721db73c74d1f46c0866d2392564b22c6b1fc897ed14c1f8024acfa21c8e8accae7

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/4516-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4516-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4516-2-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/4516-3-0x00000000005E0000-0x00000000005E6000-memory.dmp

    Filesize

    24KB

  • memory/4516-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4576-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4576-21-0x00000000006C0000-0x00000000006C6000-memory.dmp

    Filesize

    24KB

  • memory/4576-26-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/4576-49-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB