Analysis

  • max time kernel
    131s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/05/2024, 15:13

General

  • Target

    2024-05-20_bb4749894794cfd0480a9fb04a932f67_cryptolocker.exe

  • Size

    80KB

  • MD5

    bb4749894794cfd0480a9fb04a932f67

  • SHA1

    50d56f96299d4ce9f52b27e981827a35abbd9475

  • SHA256

    5d502b25dd47571236d61011ed9d5f6c575962c77f3c23225cd4f00b6ead3885

  • SHA512

    efec9b1c87893e29c0f61d9bde61010aa9d8bd46b4f353e674ae6b223cae9562bbd89c0176130310bb1e2933e226cfd05370621653df07a5f196fba202e9ac63

  • SSDEEP

    1536:zj+soPSMOtEvwDpj4ktBl01hJ0tq1ky7Q5:zCsanOtEvwDpjt

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 5 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\2024-05-20_bb4749894794cfd0480a9fb04a932f67_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-20_bb4749894794cfd0480a9fb04a932f67_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3472
    • 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:2104

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          81KB

          MD5

          3e7b3ef5622243d8237e71b052e9de29

          SHA1

          00c5fd311a8e97cb1aa6216507006ccbe76e7b16

          SHA256

          71c21b0a960a8d94bf3aeb0f515c7bc61ab1a072a7de60c09b54233b5ad0e04b

          SHA512

          a8880a75cb1aac5b576e2de4acf5298d2cec279d0fb2ceede73c88b382f56918ab2526ea1448ca09e6ecec1a7d8a9f584d89a9dc809a485842e6ff12d8ecb771

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/2104-18-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2104-20-0x0000000000660000-0x0000000000666000-memory.dmp

          Filesize

          24KB

        • memory/2104-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/2104-51-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3472-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/3472-1-0x00000000021E0000-0x00000000021E6000-memory.dmp

          Filesize

          24KB

        • memory/3472-2-0x00000000021E0000-0x00000000021E6000-memory.dmp

          Filesize

          24KB

        • memory/3472-4-0x0000000002100000-0x0000000002106000-memory.dmp

          Filesize

          24KB

        • memory/3472-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB