Analysis

  • max time kernel
    88s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/03/2024, 09:06

General

  • Target

    2024-03-28_fa968aa4423c04bc28c26ea8a297b69e_cryptolocker.exe

  • Size

    49KB

  • MD5

    fa968aa4423c04bc28c26ea8a297b69e

  • SHA1

    88ac33343c1f0d9d3fefc2837055a40f89fc7052

  • SHA256

    80f265d8c10a61cc34f6b61082ea73ada868afa319df868f8d2e9ec667111412

  • SHA512

    8f14100fc04e4038286ce1254449df93ff9f0a97202c2927569e6e8a6a8e9dc61890de11fbe5de3b14d1a441f559788a9286e8042031f67449638834c35049cc

  • SSDEEP

    1536:nP+4zs2cPszL3MOtEvwDpj4Hy7B3g9CWuAxWLO:m4Q2ckzIOtEvwDpj4HYe

Score
9/10
upx

Malware Config

Signatures

  • Detection of CryptoLocker Variants 4 IoCs
  • Detection of Cryptolocker Samples 2 IoCs
  • UPX dump on OEP (original entry point) 4 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 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).

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\2024-03-28_fa968aa4423c04bc28c26ea8a297b69e_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-28_fa968aa4423c04bc28c26ea8a297b69e_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2916
    • 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:3296

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    50KB

    MD5

    ca87ab2495068d823f1f7f6966761931

    SHA1

    10acd2585561b253522173381d8e851fa8412aac

    SHA256

    d545dc9ef9f396beab835886d82782f39e5ade8962b59979ffc1ae1b01488e16

    SHA512

    fa58fac4a8a03dd307cfa298c8eb70bf7fd1fe1e07bd5b3da26fb3b2fbe4880e8d5bcd38ee3198714cc376621c0b5ea1a863c169566a8a4092bcdf8c0c62a27d

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

    Filesize

    315B

    MD5

    a34ac19f4afae63adc5d2f7bc970c07f

    SHA1

    a82190fc530c265aa40a045c21770d967f4767b8

    SHA256

    d5a89e26beae0bc03ad18a0b0d1d3d75f87c32047879d25da11970cb5c4662a3

    SHA512

    42e53d96e5961e95b7a984d9c9778a1d3bd8ee0c87b8b3b515fa31f67c2d073c8565afc2f4b962c43668c4efa1e478da9bb0ecffa79479c7e880731bc4c55765

  • memory/2916-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2916-1-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/2916-2-0x0000000000640000-0x0000000000646000-memory.dmp

    Filesize

    24KB

  • memory/2916-3-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/2916-17-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/3296-19-0x0000000000680000-0x0000000000686000-memory.dmp

    Filesize

    24KB

  • memory/3296-21-0x0000000000560000-0x0000000000566000-memory.dmp

    Filesize

    24KB

  • memory/3296-50-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB