Overview

overview

10

Static

static

3

CryptoLocker.exe

windows10-ltsc_2021-x64

10

Analysis

  • max time kernel
    151s
  • max time network
    152s
  • platform
    windows10-ltsc_2021_x64
  • resource
    win10ltsc2021-20250314-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20250314-enlocale:en-usos:windows10-ltsc_2021-x64system
  • submitted
    04/04/2025, 10:24

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General

  • Target

    CryptoLocker.exe

  • Size

    338KB

  • MD5

    04fb36199787f2e3e2135611a38321eb

  • SHA1

    65559245709fe98052eb284577f1fd61c01ad20d

  • SHA256

    d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

  • SHA512

    533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444

  • SSDEEP

    6144:sWmw0EuCN0pLWgTO3x5N22vWvLRKKAX5l++SybIvC:sWkEuCaNT85I2vCMX5l+ZRv

Score
10/10
cryptolockerdiscoverypersistenceransomware

Malware Config

Signatures

  • CryptoLocker

    Ransomware family with multiple variants.

    ransomwarecryptolocker
  • Cryptolocker family
    cryptolocker
  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops file in Windows directory 4 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CryptoLocker.exe
    "C:\Users\Admin\AppData\Local\Temp\CryptoLocker.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:980
    • C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
      "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" "/rC:\Users\Admin\AppData\Local\Temp\CryptoLocker.exe"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5696
      • C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
        "C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe" /w00000240
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1692
  • C:\Windows\system32\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:232
    • C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
      C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:64
  • C:\Program Files\7-Zip\7zFM.exe
    "C:\Program Files\7-Zip\7zFM.exe"
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    PID:2464
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s DisplayEnhancementService
    1⤵
      PID:1996
    • C:\Windows\System32\oobe\UserOOBEBroker.exe
      C:\Windows\System32\oobe\UserOOBEBroker.exe -Embedding
      1⤵
      • Drops file in Windows directory
      PID:5524
    • C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe
      C:\Users\Admin\AppData\Local\Microsoft\OneDrive\18.151.0729.0013\FileCoAuth.exe -Embedding
      1⤵
      • System Location Discovery: System Language Discovery
      PID:3632
    • C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\SecHealthUI.exe
      "C:\Windows\SystemApps\Microsoft.Windows.SecHealthUI_cw5n1h2txyewy\SecHealthUI.exe" -ServerName:SecHealthUI.AppXep4x2tbtjws1v9qqs0rmb3hxykvkpqtn.mca
      1⤵
      • Suspicious use of SetWindowsHookEx
      PID:912
    • C:\Windows\System32\SecurityHealthHost.exe
      C:\Windows\System32\SecurityHealthHost.exe {E041C90B-68BA-42C9-991E-477B73A75C90} -Embedding
      1⤵
        PID:2660
      • C:\Windows\System32\SecurityHealthHost.exe
        C:\Windows\System32\SecurityHealthHost.exe {E041C90B-68BA-42C9-991E-477B73A75C90} -Embedding
        1⤵
          PID:2696

        Network

        MITRE ATT&CK Enterprise v15

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        Downloads

        • C:\Users\Admin\AppData\Roaming\{34184A33-0407-212E-3320-09040709E2C2}.exe
          Filesize

          338KB

          MD5

          04fb36199787f2e3e2135611a38321eb

          SHA1

          65559245709fe98052eb284577f1fd61c01ad20d

          SHA256

          d765e722e295969c0a5c2d90f549db8b89ab617900bf4698db41c7cdad993bb9

          SHA512

          533d6603f6e2a77bd1b2c6591a135c4717753d53317c1be06e43774e896d9543bcd0ea6904a0688aa84b2d8424641d68994b1e7dc4aa46d66c36feecb6145444

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