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Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/03/2024, 06:27

General

  • Target

    2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe

  • Size

    100KB

  • MD5

    101622887efedb5dc0c1f86022ec07a9

  • SHA1

    ade51e796bfb6ab3e70d9a2c3421ac3282b6c975

  • SHA256

    f2b1e047fdb62f148bb72593ce14a003dee33fa6cba04b18f66f0e85ecd6fc86

  • SHA512

    3e27a51192895ff08a29958c8ddc7ff133cd0c874d84802eddc524500c45f0ed301ba8ae660b2d848379c9a808651fc93370fb6a911008c20a0c9f931fc24bd5

  • SSDEEP

    1536:qkmnpomddpMOtEvwDpjJGYQbN/PKwNgpwqWsviPy/:AnBdOOtEvwDpj6zk

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\2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe
    "C:\Users\Admin\AppData\Local\Temp\2024-03-26_101622887efedb5dc0c1f86022ec07a9_cryptolocker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4504
    • C:\Users\Admin\AppData\Local\Temp\asih.exe
      "C:\Users\Admin\AppData\Local\Temp\asih.exe"
      2⤵
      • Executes dropped EXE
      PID:3340

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    100KB

    MD5

    c67d9fe843c5853a598127d76db6fe75

    SHA1

    eb015d0b78146a39a38bbef1009ab3e8b291ac73

    SHA256

    26c2afe2743f464b2d7333047b46a40a5eaf7d219c71fd27a8c3111171c9abd2

    SHA512

    5aaf4f3de07eb0a4b2daa8df00e3a5e553c92e835ab76c8e51546462ed509b9348e79d83cc666fbabd6dc214b8f14792eec3e4af4f7a5dffd25f9cd7e13e4fa9

  • memory/3340-17-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/3340-20-0x00000000004D0000-0x00000000004D6000-memory.dmp

    Filesize

    24KB

  • memory/3340-21-0x00000000004F0000-0x00000000004F6000-memory.dmp

    Filesize

    24KB

  • memory/3340-27-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4504-0-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB

  • memory/4504-1-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4504-2-0x0000000000660000-0x0000000000666000-memory.dmp

    Filesize

    24KB

  • memory/4504-3-0x0000000000710000-0x0000000000716000-memory.dmp

    Filesize

    24KB

  • memory/4504-18-0x0000000000500000-0x000000000050F000-memory.dmp

    Filesize

    60KB