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Analysis

  • max time kernel
    148s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20/04/2024, 15:47

General

  • Target

    2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe

  • Size

    59KB

  • MD5

    d78a75df911cedf45c9b11d98bb0308f

  • SHA1

    74f2c8d1e1d23a3534c5a644c0fb0eb2cd20c8ee

  • SHA256

    2880853b3ea42a329d0beda269bfee3b5426d735a1566ad377c5cda5ddf22d3c

  • SHA512

    ce2d47a61a1c85a9844d096473c8adafb4b9f81d6819a330db62515efb4618c2fdcb7864083812ea784621c67e656784f4d522994e1c7334ae4bc5c311be3e95

  • SSDEEP

    768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5app1J7A:z6QFElP6n+gKmddpMOtEvwDpj9aYaz7A

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\2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-04-20_d78a75df911cedf45c9b11d98bb0308f_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:384
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2680

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    59KB

    MD5

    aa05f1d2bc2c874bf5e3f82bf3e43e82

    SHA1

    8ac825bc85a87d6e5ed3643ea840395b54ad08dd

    SHA256

    78201df18644b3d9cdd0cf8cc1321aa409d65d26f16bd79bd98d991552097835

    SHA512

    412242beb64a40c76a1f40cc39061f452457eaab734a9fdc32127642e0ff380007fd4d8b3aab2a0fbe2c91cb7a3d6fa73993e30aa347d439cecd29109884ace0

  • memory/384-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/384-1-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/384-2-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/384-3-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/384-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2680-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2680-20-0x00000000006D0000-0x00000000006D6000-memory.dmp

    Filesize

    24KB

  • memory/2680-26-0x00000000006A0000-0x00000000006A6000-memory.dmp

    Filesize

    24KB

  • memory/2680-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB