Analysis

  • max time kernel
    90s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/06/2024, 05:22

General

  • Target

    2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe

  • Size

    57KB

  • MD5

    3d024fb7baaa334c2960f3fbeedd05fb

  • SHA1

    2bd256a8081615f46de79e90a1f31cf5518bd19d

  • SHA256

    5ec61f5a1d05c4c65b3416e73daa69b8453d62140cdadf5f3b967fd66cdb6ceb

  • SHA512

    200322915004cd627c2e5264fd8e6eebfa3cc83a70fa86c6baf92077ea1c072770d202ad7e5b383b9d6cf75a97d52be9c4ba79c35293660b3374f4f09c57d90a

  • SSDEEP

    768:bP9g/WItCSsAfFaeOcfXVr3BPOz5CFBmNuFgUjlgzl:bP9g/xtCS3Dxx0nl

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 3 IoCs
  • UPX dump on OEP (original entry point) 3 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 3 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\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-06-02_3d024fb7baaa334c2960f3fbeedd05fb_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1140
    • C:\Users\Admin\AppData\Local\Temp\gewos.exe
      "C:\Users\Admin\AppData\Local\Temp\gewos.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      PID:2584

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

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

          Filesize

          57KB

          MD5

          c2f7c450456777d0bbd7c871567731db

          SHA1

          7e003d132fdacd1cbe4cc4daa0eb534f78523a45

          SHA256

          5c10a9ac7d93af10f0979da619232bb83d4f0f01eb059fbcdd8f6bff8bcc86ee

          SHA512

          33e9f599be7a6743265995c2d0ace6223ae0a508037d1181a8394506292275aa38b9cced192e67dfa795cbc1aea1908a4af04ed4db669a577a24bc354b6126ec

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

          Filesize

          185B

          MD5

          4f0ca1b622d722145d4362acd91c5ce5

          SHA1

          ddab15c0781a9c08bae9e6366d47f1be91708851

          SHA256

          2bd91df1429af0bf0a2a68156d3be3379a20313d8537b7ba495c1c2812e34a5d

          SHA512

          77915e078ddf6caadd2b367fdccbbe0cc5435b106636f49bca58ab2e8514350ef21b4c8741da520d4b41e1233ee0cec3b96c025a588201cba622831a7387021c

        • memory/1140-0-0x0000000000400000-0x000000000040E000-memory.dmp

          Filesize

          56KB

        • memory/1140-1-0x0000000000500000-0x0000000000506000-memory.dmp

          Filesize

          24KB

        • memory/1140-2-0x0000000000400000-0x0000000000406000-memory.dmp

          Filesize

          24KB

        • memory/1140-9-0x0000000000500000-0x0000000000506000-memory.dmp

          Filesize

          24KB

        • memory/2584-19-0x0000000000400000-0x000000000040E000-memory.dmp

          Filesize

          56KB

        • memory/2584-21-0x0000000002190000-0x0000000002196000-memory.dmp

          Filesize

          24KB