Analysis

  • max time kernel
    92s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/04/2024, 09:49

General

  • Target

    2024-04-06_aab7618a10e512d224036d533ed79a39_cryptolocker.exe

  • Size

    69KB

  • MD5

    aab7618a10e512d224036d533ed79a39

  • SHA1

    36a480b7c35964b72803bb9546efbc5fb663fc3f

  • SHA256

    4e6362e6feded696daa7ef36c2ab2d2b2f48a6f92cfa55195ae7bf269860c134

  • SHA512

    2b64b28415fec16197c594d7826e2eba31673b3c37ad7dc0d0f1626e9eb03f5a99e64b2d82650bd6560d8990d366ff863556db4adc3f74f75ec73bfcad1cf913

  • SSDEEP

    1536:nj+4zs2cPVhlMOtEvwDpj4H8u8rZVTs92:C4Q2c94OtEvwDpj4H8zT

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 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 4 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\2024-04-06_aab7618a10e512d224036d533ed79a39_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-06_aab7618a10e512d224036d533ed79a39_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2876
    • 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:548

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          69KB

          MD5

          8b814fcdad6a0aa087667d86571fd0f1

          SHA1

          037553fba07ac1a81cf2f4e789d3dd852256f6f9

          SHA256

          e5412b3f5ee770dcdf51aa97f63b6d19d07bc89b40f9f88a42505993e8706ba9

          SHA512

          516a6af656e7575c0692dc4d606ec15f724b2727c2b4e31967e2a3786796656d7f48b722600436ec70789211189205af8f40087a13a63b3cd8201c51880e6349

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

          Filesize

          315B

          MD5

          a34ac19f4afae63adc5d2f7bc970c07f

          SHA1

          a82190fc530c265aa40a045c21770d967f4767b8

          SHA256

          d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

          SHA512

          42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

        • memory/548-19-0x0000000000730000-0x0000000000736000-memory.dmp

          Filesize

          24KB

        • memory/548-20-0x0000000001FF0000-0x0000000001FF6000-memory.dmp

          Filesize

          24KB

        • memory/548-48-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2876-0-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB

        • memory/2876-1-0x00000000021D0000-0x00000000021D6000-memory.dmp

          Filesize

          24KB

        • memory/2876-2-0x00000000021D0000-0x00000000021D6000-memory.dmp

          Filesize

          24KB

        • memory/2876-3-0x00000000020F0000-0x00000000020F6000-memory.dmp

          Filesize

          24KB

        • memory/2876-17-0x0000000000500000-0x0000000000510000-memory.dmp

          Filesize

          64KB