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Analysis

  • max time kernel
    148s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24/01/2024, 12:37

General

  • Target

    2024-01-24_e848f7c2406db68d8ed2754e5908a609_cryptolocker.exe

  • Size

    56KB

  • MD5

    e848f7c2406db68d8ed2754e5908a609

  • SHA1

    e46b33bcb2bf1a36f2ca39a041990557d2be5fa7

  • SHA256

    71acdcd765ec5628c86227b01459e508755ee83905f8fe655ed3f604d03b9c91

  • SHA512

    8a74307606d35f7fcbb2d4639e2e679b0e248791891e9c8dfd33b8026075e88cb30e7a0b0986246a0f1cbc3bc8beefbd10ce59dcaed511fcd0f8200f616c58f2

  • SSDEEP

    768:z6LsoEEeegiZPvEhHSG+gzum/kLyMro2GtOOtEvwDpj/YMLam5apr:z6QFElP6n+gKmddpMOtEvwDpj9aYal

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\2024-01-24_e848f7c2406db68d8ed2754e5908a609_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-01-24_e848f7c2406db68d8ed2754e5908a609_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2536
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:2068

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    56KB

    MD5

    a20d68269ff150f242ca16e4ccc39792

    SHA1

    d589cced133e1179089e82a3abe370eda791cce6

    SHA256

    cd5b4542b12eff591c122d0e39f307f2a33bbcda1754858b4fd9992643ea27a4

    SHA512

    af95fb0d83a1159aabc3381074761c8b5164e612b9ca85c28a221edac3e1534c45253b921034b3349986cf0f6f084fc16ae2555015633ec20df0faaa0c094fb8

  • memory/2068-20-0x0000000001F70000-0x0000000001F76000-memory.dmp

    Filesize

    24KB

  • memory/2068-26-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB

  • memory/2068-18-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2068-27-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2536-0-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2536-2-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB

  • memory/2536-3-0x0000000002230000-0x0000000002236000-memory.dmp

    Filesize

    24KB

  • memory/2536-16-0x0000000000500000-0x0000000000510000-memory.dmp

    Filesize

    64KB

  • memory/2536-1-0x0000000002310000-0x0000000002316000-memory.dmp

    Filesize

    24KB