Analysis

  • max time kernel
    148s
  • max time network
    161s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-01-2024 10:16

General

  • Target

    2024-01-19_b67428da551747120d516a9012207d21_cryptolocker.exe

  • Size

    61KB

  • MD5

    b67428da551747120d516a9012207d21

  • SHA1

    0877cbbb8f7d9897bab2c7d9803f310b46fc96e6

  • SHA256

    415f537c0ecffd367be35ac1f42ee2e450b36bea3babf38dd9a0505f7aedc062

  • SHA512

    98754753adcbb2a5d44b0502f452cb1af8cea3133d96afb98fa093917529d67bf98ed97985637e8fd46e36b80e466b405a76a0e5bf89cc767171bca104b5baa3

  • SSDEEP

    768:zQz7yVEhs9+syJP6ntOOtEvwDpjFelaB7yBEY9Su8F5mLZ5aV:zj+soPSMOtEvwDpj4kpmeLmo

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 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
  • UPX packed file 4 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 6 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-01-19_b67428da551747120d516a9012207d21_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-19_b67428da551747120d516a9012207d21_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1688
    • 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:4872

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    62KB

    MD5

    f4999662234aaa6ed9103d3352f6b6e9

    SHA1

    303bb140e10eb7aa601954f413612d41e7b55c4d

    SHA256

    ee57b6f529e731e2d84f419e526a330216503d44e6ea4a4f7ea1c71753ead2c3

    SHA512

    591003f2a45ec9b1a62e1245f5ec75e93102556ae50a340cdf7b9b1a612c5e6ce07dc6c0ba17ae4070570e783051a1ced4e5083dde042ff8c0764e237169a11d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1688-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1688-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1688-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/1688-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/1688-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4872-19-0x0000000002100000-0x0000000002106000-memory.dmp

    Filesize

    24KB

  • memory/4872-20-0x0000000001F10000-0x0000000001F16000-memory.dmp

    Filesize

    24KB

  • memory/4872-39-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB