Analysis

  • max time kernel
    148s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    25/01/2024, 10:28

General

  • Target

    2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe

  • Size

    94KB

  • MD5

    b77b86f42ded510b3bb1d6d366408e33

  • SHA1

    1f5ab3788fee763b216a5ec70df96d139992011a

  • SHA256

    dd00866608d3473ef19cb3ca94908773cfced474ca7c4016e4ed688653ca845d

  • SHA512

    46547bd6e3461cdc0ba8b364d6dcc4cf067b70b0d0e01198110884f5e8051c5981008da0b9473f16a72dde9cfc276dc541a93e0376f3981e12c93715d91461b3

  • SSDEEP

    1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgp01hT:AnBdOOtEvwDpj6z3

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\2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-25_b77b86f42ded510b3bb1d6d366408e33_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2484
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2752

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    95KB

    MD5

    8f078c484cb52f485be68d8f4a6a7933

    SHA1

    8775b1aef6e0cfda5f1eb3173347ce73c3a27826

    SHA256

    6e46dd835f9ba3d9ac97a59534d124443c77ffcc499d2c6f39c373af02d5a095

    SHA512

    3954809303ddefed7d334f1fc517b65b883be3643bf39301d858bab51af2efc3364d9dc35eb35a9ed4599b03677133c6a4fd7eb60c94b56ef68641d94c1cd23e

  • memory/2484-1-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2484-0-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/2484-2-0x00000000002B0000-0x00000000002B6000-memory.dmp

    Filesize

    24KB

  • memory/2484-4-0x0000000000240000-0x0000000000246000-memory.dmp

    Filesize

    24KB

  • memory/2484-14-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2484-16-0x0000000002470000-0x000000000247F000-memory.dmp

    Filesize

    60KB

  • memory/2484-29-0x0000000002470000-0x000000000247F000-memory.dmp

    Filesize

    60KB

  • memory/2752-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/2752-19-0x0000000000470000-0x0000000000476000-memory.dmp

    Filesize

    24KB

  • memory/2752-21-0x0000000000440000-0x0000000000446000-memory.dmp

    Filesize

    24KB

  • memory/2752-27-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB