Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/05/2024, 12:35

General

  • Target

    2024-05-01_7d58c8fe2a93d5744e306a3b2285a82d_cryptolocker.exe

  • Size

    68KB

  • MD5

    7d58c8fe2a93d5744e306a3b2285a82d

  • SHA1

    7d3c1584f176e6e06a460237b26526eead734d2e

  • SHA256

    9b28bee49b5a004902959c29f81726aa22c925eb66c8fd9c123959bae08c6006

  • SHA512

    29d2e66f34fbb488f64b8dcc598dfa50ddf67e6920a7541dfb475c6f388807e1bbe8e044c40d12b07cf0d1230b600d79f499eb863af3e7cc300d239c50d6d37c

  • SSDEEP

    768:quVbxjgQNQXtckstOOtEvwDpjAaDOK6PsED3VK2+ZtyOjgO4r9vFAg2rq6W1A1PF:quJu9cvMOtEvwDpjWYTjipvF2bx1PQAF

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 1 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-01_7d58c8fe2a93d5744e306a3b2285a82d_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-01_7d58c8fe2a93d5744e306a3b2285a82d_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3900
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:816

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          69KB

          MD5

          92c6917fa8adede4d41313c1596d745e

          SHA1

          6e65fd83a99ff68c1dcbc9ba2b72a4dab094bc7d

          SHA256

          28ae2ec220c3dc0f71d8ea78e77997b80168c28b8150b6c6dc5c4d28d4836415

          SHA512

          b769cc0344bd0b5af8c35e9653d2293d1c25259791dc6bd21e07ef108fdb02b916f792a22963d8521385dee0702fa9ec35fef3cb4719d0e79ad8483db835c0b3

        • memory/816-18-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB

        • memory/816-20-0x00000000020F0000-0x00000000020F6000-memory.dmp

          Filesize

          24KB

        • memory/816-26-0x0000000000730000-0x0000000000736000-memory.dmp

          Filesize

          24KB

        • memory/816-27-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB

        • memory/3900-0-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB

        • memory/3900-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/3900-2-0x00000000004F0000-0x00000000004F6000-memory.dmp

          Filesize

          24KB

        • memory/3900-9-0x00000000004D0000-0x00000000004D6000-memory.dmp

          Filesize

          24KB

        • memory/3900-17-0x0000000000500000-0x000000000050F000-memory.dmp

          Filesize

          60KB