Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/01/2024, 15:12

General

  • Target
    1945c44901e7aa9dd5b6e7e6e07a777d57f7e76120a3ca5a46a0f983d30ce37e.exe
  • Size 640KB
  • Sample240101-sladjafeg6
  • SHA256 1945c44901e7aa9dd5b6e7e6e07a777d57f7e76120a3ca5a46a0f983d30ce37e
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Signatures

  • Dharma

    Dharma is a ransomware that uses security software installation to hide malicious activities.

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Renames multiple (495) files with added filename extension

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

  • Drops startup file 4 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Drops file in System32 directory 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\1945c44901e7aa9dd5b6e7e6e07a777d57f7e76120a3ca5a46a0f983d30ce37e.exe
    "C:\Users\Admin\AppData\Local\Temp\1945c44901e7aa9dd5b6e7e6e07a777d57f7e76120a3ca5a46a0f983d30ce37e.exe"
    1⤵
    • Drops startup file
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Drops file in System32 directory
    • Drops file in Program Files directory
    • NTFS ADS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:756
    • C:\Windows\system32\cmd.exe
      "C:\Windows\system32\cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2732
      • C:\Windows\system32\mode.com
        mode con cp select=1251
        3⤵
          PID:1784
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          3⤵
          • Interacts with shadow copies
          PID:5900
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2544

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

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          Downloads

          appvcleaner.exe.id-833605E4.[[email protected]].AUDIT

          • Path C:\Program Files\Common Files\microsoft shared\ClickToRun\appvcleaner.exe.id-833605E4.[[email protected]].AUDIT
          • Size 1.3MB
          • SHA256 722b881f088b5eb2fa68ca7befde2c991702d30f916c5597f7b1df96e09b6404
          • MD5 SHA1 SHA512 SSDEEP

          memory/756-0-0x0000000002270000-0x00000000022AA000-memory.dmp

          memory/756-1-0x0000000002570000-0x0000000002571000-memory.dmp

          memory/756-2-0x0000000002570000-0x0000000002571000-memory.dmp

          memory/756-3-0x0000000002570000-0x0000000002571000-memory.dmp

          memory/756-4-0x0000000002570000-0x0000000002571000-memory.dmp

          memory/756-5-0x0000000002570000-0x0000000002571000-memory.dmp

          memory/756-6-0x0000000000400000-0x00000000004A2000-memory.dmp

          memory/756-2340-0x0000000002570000-0x0000000002571000-memory.dmp

          memory/756-3067-0x0000000000400000-0x00000000004A2000-memory.dmp