Overview

overview

9

Static

static

1

Crypter.exe

windows7-x64

9

Crypter.exe

windows10-2004-x64

9

Resubmissions

28-03-2023 07:33

230328-jdsqgabd7x 9

28-03-2023 06:55

230328-hpt71ahe24 9

Analysis

  • max time kernel
    137s
  • max time network
    131s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-03-2023 07:33

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General

  • Target

    Crypter.exe

  • Size

    129KB

  • MD5

    9c62af504ce79cc4c0bbcc2612f3c4db

  • SHA1

    37c01dc0342c161569e9d434246dc42962c00860

  • SHA256

    43c9c228baf00bc4614fdeb578eb84ad2232cef6c2820046b0b9fec502be573f

  • SHA512

    3572b9dde32844ba873de6c994dcf42e71bc217806390d6cf9d767d4c837266592087837aa70991604e3bd283a27a6e11d1d48177996213e8575326f86f839f3

  • SSDEEP

    3072:qLbLpVIYbQf91G3im/2Ef07JysgNv8Ofr4pt6Y46ab6koEMQBfjS3f2vYeBgrOi4:qTpVXvxyq6ko0BSveYprzOu3ScuT06

Score
9/10
ransomwarespywarestealer

Malware Config

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomware
  • Modifies extensions of user files 1 IoCs

    Ransomware generally changes the extension on encrypted files.

    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 1 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). Likely ransomware behaviour.

  • 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\Crypter.exe
    "C:\Users\Admin\AppData\Local\Temp\Crypter.exe"
    1⤵
    • Modifies extensions of user files
    • Checks computer location settings
    • Enumerates connected drives
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:444
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:852
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:540
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4200
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:396
  • C:\Windows\system32\vssvc.exe
    C:\Windows\system32\vssvc.exe
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:2816
  • C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe
    "C:\Program Files\Common Files\Microsoft Shared\ClickToRun\OfficeClickToRun.exe" /service
    1⤵
      PID:4684
    • 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:1740

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Initial Access

    Execution

    Persistence

    Privilege Escalation

    Defense Evasion

    File Deletion

    2
    T1107

    Credential Access

    Credentials in Files

    1
    T1081

    Discovery

    Query Registry

    2
    T1012

    System Information Discovery

    3
    T1082

    Peripheral Device Discovery

    1
    T1120

    Lateral Movement

    Collection

    Data from Local System

    1
    T1005

    Exfiltration

    Command and Control

    Impact

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

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    Downloads

    • C:\ProgramData\#FILE ENCRYPTED.txt
      Filesize

      332B

      MD5

      94250996214fbc1194e5d00ca0472059

      SHA1

      4aa601fd325613df0d1e070cd9b97aaeba31033e

      SHA256

      9dbda2ff049da53281eb3336461d309b8da1de14c11169187dcfc08dcbfe4b7d

      SHA512

      8ff4dfbe8cfd6c7ab86d045827a3fa79303f77e6fa4c9ef1d5000cbf36e9a8b8c397ec2fc98de341305151872e7a50e9184a385fc703907384cb5fdaba57938f

      Download Submit
    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
      Filesize

      14KB

      MD5

      d1526c611fbfa91ce5d14239ae65da65

      SHA1

      9a0e562796985467c8e64545427f13506a4e7487

      SHA256

      167aa904fbe7aab5885a364596c3f01efca69badbb90ca8c2660ea3e46ec4ae2

      SHA512

      94e5601e35a84ac3d8838ff2ee45c60a2072a5e030fdfbb6e518f731b88b56e0da4b002d34129598d64e8025274aef8a0e44ca82ddb32c8214073def3740105d

      Download Submit
    • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\TempState\StartUnifiedTileModelCache.dat
      Filesize

      14KB

      MD5

      9f7439c824d13a43f930d7fdf40bde27

      SHA1

      95e5ca4dbf7c36109888b05451b5ce64da27d7be

      SHA256

      e9e13408f69c5925074457ed8cdcf2074e5af57aaf0a065db2f65197631635bb

      SHA512

      d3d3fb1fb588143a7f6ab497beda5e939b689c88aae7e245388be4b4bbacaa0b84e856cd03f0040b4479b027cc57905cd8cf7f5a3623925de471b3560549a457

      Download Submit