Analysis

  • max time kernel
    148s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    21/04/2024, 00:40

General

  • Target

    2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe

  • Size

    72KB

  • MD5

    a187fb61a71435098909aa9a5a4537ca

  • SHA1

    5f07eab42564c13d0b7958489c6dc9c12354951d

  • SHA256

    cd77ea721eda7eebe00bdaeb1ade8241f9b770eab50cb317f22fac3541946164

  • SHA512

    bb3160667b17070de874a507ac61aa92592feb2db88c81b4c51ca8a8c6f64e80aaf0f75cd80ef848e3d0935f1907a18b11f2cb2a0ec3d13a5243a28166de0b2e

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBz:z6a+CdOOtEvwDpjQx

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
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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).

  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-21_a187fb61a71435098909aa9a5a4537ca_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2388
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2560

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          73KB

          MD5

          1726107ef7a58c910747841cb7d7d21e

          SHA1

          4376ccc55ac91dee1d0577a84197b420d562fb8a

          SHA256

          cfbbc6afecd5844c884346ca50bacffdca05122f06cb33106a15b6f7f5969b16

          SHA512

          f87cbcc52e70af9d19972596e96b2569bb93b8bb5c193a514d658e4fd5834a3c1197fc661c57ebfe3146e800d442f258a255eb12b476976ff6c89e2e79c91411

        • memory/2388-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2388-1-0x0000000000310000-0x0000000000316000-memory.dmp

          Filesize

          24KB

        • memory/2388-2-0x00000000004B0000-0x00000000004B6000-memory.dmp

          Filesize

          24KB

        • memory/2388-3-0x0000000000310000-0x0000000000316000-memory.dmp

          Filesize

          24KB

        • memory/2388-14-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2560-16-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2560-19-0x0000000000290000-0x0000000000296000-memory.dmp

          Filesize

          24KB

        • memory/2560-18-0x00000000001D0000-0x00000000001D6000-memory.dmp

          Filesize

          24KB

        • memory/2560-26-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB