Analysis

  • max time kernel
    149s
  • max time network
    153s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    28-01-2024 19:33

General

  • Target

    2024-01-28_ac7f4ac4641d2ea6014f5d7f9b96a8d6_cryptolocker.exe

  • Size

    67KB

  • MD5

    ac7f4ac4641d2ea6014f5d7f9b96a8d6

  • SHA1

    59ae37e807cecb8306eb209ea20e6c1b63d80dd0

  • SHA256

    048089a226b95fce2aa0f3da9b6bdf87a8ff0435259cae48c9ec4dd7e4d24649

  • SHA512

    e20d4aa5c680c3dbaf1bdd5e4efa7c2261438f60967605516041265c842ad41d68f2900c1593002b54d1ff7d601b6160173a64e07e93c7e7adf8ec87ff96ec1e

  • SSDEEP

    1536:z6QFElP6n+gKmddpMOtEvwDpj9aYaFAeBW:z6a+CdOOtEvwDpjQo

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\2024-01-28_ac7f4ac4641d2ea6014f5d7f9b96a8d6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-28_ac7f4ac4641d2ea6014f5d7f9b96a8d6_cryptolocker.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:2028
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2528

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    67KB

    MD5

    b616aee1fc958389bd452d667c8ff6e6

    SHA1

    aa7b1225069f35bb5abd0743c96796426b1a9bfa

    SHA256

    75ee91969541dbca2269bab78bfa2dddf44883367039286f21d5e86803a8cecd

    SHA512

    724c6913a8212a4ecf49b7948825ca3ac9c90b769c4ccf6a62a93f259009003951c18af5e35f1f4a47204541d7757d8d92525239bab8c6e974bf1ae586243ccb

  • memory/2028-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2028-1-0x00000000001D0000-0x00000000001D6000-memory.dmp

    Filesize

    24KB

  • memory/2028-3-0x0000000000280000-0x0000000000286000-memory.dmp

    Filesize

    24KB

  • memory/2028-2-0x00000000001D0000-0x00000000001D6000-memory.dmp

    Filesize

    24KB

  • memory/2028-15-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2528-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2528-19-0x0000000000360000-0x0000000000366000-memory.dmp

    Filesize

    24KB

  • memory/2528-18-0x00000000002B0000-0x00000000002B6000-memory.dmp

    Filesize

    24KB

  • memory/2528-26-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB