Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/04/2024, 23:33

General

  • Target

    2024-04-08_a9a8394cfe211574b0af8269c5050af7_cryptolocker.exe

  • Size

    56KB

  • MD5

    a9a8394cfe211574b0af8269c5050af7

  • SHA1

    611aef75edbd4d67f19e9ddd8ac294cff56bdc5d

  • SHA256

    0927916128a9e2ee3b3b46dd38a8d34756c15fc0be6efaba1026500375e125db

  • SHA512

    6c9ede9c09f296333544134a4e5601b568d92e172f977c8ac0e1b6a49ddcff11a08620542c169226a1c82e835f724ce64e09fdae89aebf838e91bf3bd8613ef9

  • SSDEEP

    768:vQz7yVEhs9+js1SQtOOtEvwDpjz9+4hdCW1nw71TkhsiPn1YFv6dl4G91:vj+jsMQMOtEvwDpj5HH1nw73KOFiT1

Score
9/10

Malware Config

Signatures

  • Detection of CryptoLocker Variants 1 IoCs
  • Detection of Cryptolocker Samples 1 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\2024-04-08_a9a8394cfe211574b0af8269c5050af7_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-08_a9a8394cfe211574b0af8269c5050af7_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4824
    • 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:3472

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          56KB

          MD5

          248a1fc55fe5fefe63e41ef8a87b5bd0

          SHA1

          3e87c9c8a0d12d3b1e31044aa6abec713595e117

          SHA256

          b14840298dd3a60ef6e07e1f4cd26c73fc24c05351cc1a44690164557668af37

          SHA512

          85780626316e1f8b476f66e6b1754f394bf4cfba481d2475a090a43b95061544e316886d62620978208c40694677711e4c6423082c96ce2c66434f50284119b8

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/3472-18-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/3472-17-0x0000000000640000-0x0000000000646000-memory.dmp

          Filesize

          24KB

        • memory/4824-0-0x00000000021C0000-0x00000000021C6000-memory.dmp

          Filesize

          24KB

        • memory/4824-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

          Filesize

          24KB

        • memory/4824-2-0x0000000002040000-0x0000000002046000-memory.dmp

          Filesize

          24KB