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Analysis

  • max time kernel
    89s
  • max time network
    124s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 03:25

General

  • Target

    2024-03-29_01bb0e22ada23acd462ad3393ebbabdf_cryptolocker.exe

  • Size

    50KB

  • MD5

    01bb0e22ada23acd462ad3393ebbabdf

  • SHA1

    6248749a570ad3865627d49e4a8bae9de109547e

  • SHA256

    a262fa7137f55829bb65057fdfa0bcbd91e5f3c40ea136b4432d2541d97ef6f2

  • SHA512

    1784c486f08e67a15b2aad4c57055927acbef5354d1d11848212ecc8a83499afeee87579c49070ca60b62ccd0c74914cf23aa41220eb87127986e50c928df224

  • SSDEEP

    1536:nP+4zs2cPszL3MOtEvwDpj4Hy7B3g9CWuAxWLQI:m4Q2ckzIOtEvwDpj4HYv

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 5 IoCs
  • Detection of Cryptolocker Samples 3 IoCs
  • UPX dump on OEP (original entry point) 5 IoCs
  • Checks computer location settings 2 TTPs 2 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).

  • Modifies system certificate store 2 TTPs 8 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-29_01bb0e22ada23acd462ad3393ebbabdf_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-29_01bb0e22ada23acd462ad3393ebbabdf_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:3420
    • C:\Users\Admin\AppData\Local\Temp\misid.exe
      "C:\Users\Admin\AppData\Local\Temp\misid.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system certificate store
      PID:1856

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    50KB

    MD5

    a0e26306def5b29efa5f3611dd7eef6c

    SHA1

    c60222f0ffcf735fb4bcfc7bfa2c162caee56d74

    SHA256

    b07fd707fd34dc00eb30367677f3900ee0a0ac35993858761a7ae9fbdb8172ce

    SHA512

    982f886dd69d1b76328699015c41be72e4fb251eddf5529325e644c673a7af7ad9570f799f018c50c8de447f8e42c0aa96b75f8377f8e937a37f75b43a1ac155

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/1856-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/1856-20-0x0000000000850000-0x0000000000856000-memory.dmp

    Filesize

    24KB

  • memory/1856-26-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/1856-51-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3420-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3420-1-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/3420-2-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/3420-3-0x0000000000610000-0x0000000000616000-memory.dmp

    Filesize

    24KB

  • memory/3420-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB