Overview

overview

9

Static

static

3

c638ac1eee...20.exe

windows7-x64

9

c638ac1eee...20.exe

windows10-2004-x64

9

Analysis

  • max time kernel
    426s
  • max time network
    429s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230831-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230831-enlocale:en-usos:windows10-2004-x64system
  • submitted
    05/09/2023, 00:10

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General

  • Target
    c638ac1eeef2c97901d6a67e8669a265fecb16eeccda7c49b47e78667cc1fe20.exe
  • Size 138KB
  • Sample230905-af2aysce99
  • SHA256 c638ac1eeef2c97901d6a67e8669a265fecb16eeccda7c49b47e78667cc1fe20
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10
ransomwarespywarestealer

Malware Config

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Renames multiple (11342) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Interacts with shadow copies 2 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\c638ac1eeef2c97901d6a67e8669a265fecb16eeccda7c49b47e78667cc1fe20.exe
    "C:\Users\Admin\AppData\Local\Temp\c638ac1eeef2c97901d6a67e8669a265fecb16eeccda7c49b47e78667cc1fe20.exe"
    1⤵
    • Checks computer location settings
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:348
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2060
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:2492
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:7780
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:1472
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:4692
  • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
    "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
    1⤵
      PID:648
    • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
      "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
      1⤵
      • Modifies registry class
      • Suspicious use of SetWindowsHookEx
      PID:7156

    Network

          MITRE ATT&CK Enterprise v15

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          Downloads

          FILE ENCRYPTED.txt
          • Path C:\Program Files (x86)\FILE ENCRYPTED.txt
          • Size 330B
          • SHA256 be13ce3677357d50cd909b8acb34721a3a683539f40e05d978ee44ced8e1fdbe
          • MD5 SHA1 SHA512
          Submit Download

          msedge.dll.EMAIL=[[email protected]]ID=[A7BF40638C0B7184].rival
          • Path C:\Program Files (x86)\Microsoft\EdgeCore\116.0.1938.62\msedge.dll.EMAIL=[[email protected]]ID=[A7BF40638C0B7184].rival
          • Size 243.4MB
          • SHA256 398e274f6d51e82618cef1b74cff12a509ccae533a594503f1da44d60ae6cb84
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          MicrosoftEdge_X64_116.0.1938.62.exe.EMAIL=[[email protected]]ID=[A7BF40638C0B7184].rival
          • Path C:\Program Files (x86)\Microsoft\EdgeUpdate\Install\{C3334BD0-12B8-4B45-9E44-89AF8D41F229}\MicrosoftEdge_X64_116.0.1938.62.exe.EMAIL=[[email protected]]ID=[A7BF40638C0B7184].rival
          • Size 145.6MB
          • SHA256 a8fd9c2fdc40cb45970b4ed5305e4e8d35137d4dddaa5b5b9913b27ec18f1bdf
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          EdgeWebView.dat.DATA
          • Path C:\Program Files (x86)\Microsoft\EdgeWebView\Application\116.0.1938.62\ResiliencyLinks\EdgeWebView.dat.DATA
          • Size 8KB
          • SHA256 287a351282b09470576c7d5c22dadd1a0377c76246dee2f89c969a51b97ca79f
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          StartUnifiedTileModelCache.dat
          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
          • Size 14KB
          • SHA256 b467849d6c685359359d542f6a565dba1ea20847ac97a79b4689fd61ee1702e1
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download

          StartUnifiedTileModelCache.dat
          • Path C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
          • Size 14KB
          • SHA256 4dee12edb94732465db579c7525e200fd54b367c076a24cf5f20ca14f21f00cd
          • MD5 SHA1 SHA512 SSDEEP
          Submit Download