Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-05-2024 03:33

General

  • Target

    2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe

  • Size

    38KB

  • MD5

    759ad7e953c6ee287297b1a1ec0dd9f6

  • SHA1

    1d5cdbe9393d68e1921554a705dce20a0f791b74

  • SHA256

    ba43f06baed4281bb97e7d9bc1a7a0ec8c4efc3e0f189b297fd52d9ada8f3807

  • SHA512

    c4d55e0144f1e62695287bccc75a4576ae068bb4b78b2e737a1ae10ec857063a2f487d16d145a9ac6dfd645ada268ad62d97b2bfa6d61dbe447432f5d89149a9

  • SSDEEP

    768:q7PdFecFS5agQtOOtEvwDpjeMLZdzuqpXsiE8Wq/DpkITYan3:qDdFJy3QMOtEvwDpjjWMl7Tdn3

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 4 IoCs
  • UPX dump on OEP (original entry point) 4 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 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).

  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-05-04_759ad7e953c6ee287297b1a1ec0dd9f6_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:1336
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:4588

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    38KB

    MD5

    1d5acb7031957b805df3020d3c3f2d40

    SHA1

    634384df590329e5c4c28f2cafd38d5a553754e3

    SHA256

    753d45670c78337cb17ea277922ba4864dad29a07ab0fb2c5a8950c03723f049

    SHA512

    29b604753ee2a6aef12dc1ab2711f3a201f73c7bb9c784e259d6a29ae33c0c3c2d0969016c74fe1c85b2418c3282f1f0348ccc622acda9650e8f1cdaaa0dc2a1

  • memory/1336-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1336-1-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1336-2-0x00000000006E0000-0x00000000006E6000-memory.dmp

    Filesize

    24KB

  • memory/1336-9-0x00000000004E0000-0x00000000004E6000-memory.dmp

    Filesize

    24KB

  • memory/1336-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/4588-20-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/4588-26-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/4588-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB