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Analysis

  • max time kernel
    148s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/03/2024, 03:33

General

  • Target

    2024-03-27_317c31ad1532979f648bcf95563f94d9_cryptolocker.exe

  • Size

    35KB

  • MD5

    317c31ad1532979f648bcf95563f94d9

  • SHA1

    601c7ef6193224e255dbba5a22ce5961d764e82a

  • SHA256

    41925d8861b11afa9a145b324da96b1afa779e2f242bfe2fb01cdef598051f63

  • SHA512

    4b244b95453ab9430ddb656617abe0c1edf03de093472cfb7bdf62792d8e99fd31bd4fee97e413114fb6373a6dcd8762810e42e8aadd0619d01214aca1e7518a

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITL:qDdFJy3QMOtEvwDpjjWMl7TL

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\2024-03-27_317c31ad1532979f648bcf95563f94d9_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-27_317c31ad1532979f648bcf95563f94d9_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4344
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4648

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    35KB

    MD5

    523f2aa4638e8b3039c786eecdb48f55

    SHA1

    e7d059d437ba9a0f62e32e4fbb998a73a55eab8c

    SHA256

    3f4e921aa88b9999eb229f7a68ad0077b57aba10dec3e089d22c5b6950e59a5b

    SHA512

    16bff0f12d47ee35b96674ecdae80003c3724fc4060687d3f08e9772ef1ba6059359e18c5ede56741af1a23b234a433818f5388a924dc8439f5bb93cdf6195da

  • memory/4344-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4344-1-0x00000000021C0000-0x00000000021C6000-memory.dmp

    Filesize

    24KB

  • memory/4344-2-0x00000000021C0000-0x00000000021C6000-memory.dmp

    Filesize

    24KB

  • memory/4344-3-0x0000000002050000-0x0000000002056000-memory.dmp

    Filesize

    24KB

  • memory/4344-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4648-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4648-20-0x0000000002000000-0x0000000002006000-memory.dmp

    Filesize

    24KB

  • memory/4648-22-0x0000000001FD0000-0x0000000001FD6000-memory.dmp

    Filesize

    24KB

  • memory/4648-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB