Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16/03/2024, 04:44

General

  • Target

    2024-03-16_cd385c7bda8c1b1efb09ef65c8330b01_cryptolocker.exe

  • Size

    81KB

  • MD5

    cd385c7bda8c1b1efb09ef65c8330b01

  • SHA1

    7cb7a5951290eac558a3844fabdafeb8415c7843

  • SHA256

    76e63c7718db41abb67ff4487c1bca954408bfb8af360aeb615c87ebd914116a

  • SHA512

    949a4f4924bc91c08634dd019ca5dac2bbb56643a2a69a480b0e3667db3bd10b0a4c0517e18eba6f98f4b71edf1d37a055906ae70abea62bfdb8e060e8c22c72

  • SSDEEP

    1536:Tj+jsMQMOtEvwDpj5HmpJpOUHECgNMo0vp2EMMrF:TCjsIOtEvwDpj5HE/OUHnSMv

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 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 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-16_cd385c7bda8c1b1efb09ef65c8330b01_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-16_cd385c7bda8c1b1efb09ef65c8330b01_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:692
    • 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:1984

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    81KB

    MD5

    0eb0f2e7e35efd382b3b882ac40ec56b

    SHA1

    0e8186538b647256cc26e58cce6587b8b34b5931

    SHA256

    d2748c5942612b17016f890f82835a7d97acf6f055ebfcf0ee80a4b1e262f762

    SHA512

    9f830b4610029b4f0805bf9f298f6d407a36876c16585b391678b211972065911228cd6dbfb9c04169a2d4e25e4b419d498737c96a3a5c1bc50babf4c8ef446d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/692-0-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/692-1-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/692-2-0x0000000000510000-0x0000000000516000-memory.dmp

    Filesize

    24KB

  • memory/692-3-0x0000000000630000-0x0000000000636000-memory.dmp

    Filesize

    24KB

  • memory/692-18-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/1984-17-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB

  • memory/1984-20-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

    Filesize

    24KB

  • memory/1984-24-0x0000000001FC0000-0x0000000001FC6000-memory.dmp

    Filesize

    24KB

  • memory/1984-49-0x0000000000500000-0x000000000050E000-memory.dmp

    Filesize

    56KB