Analysis

  • max time kernel
    93s
  • max time network
    167s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    12-08-2021 11:18

General

  • Target

    21b111a98beb3fade37bdff4abd0e8ce.exe

  • Size

    61KB

  • MD5

    21b111a98beb3fade37bdff4abd0e8ce

  • SHA1

    b74d2e4477efc84bf239a1a780fb59f10ac7f371

  • SHA256

    5728cda6365347f792106d8826d9ebdfaf9d8cc40cec5cf0ef21e6584e81d5af

  • SHA512

    9933ad28242e7712df2fd667153d32b3576d25ed3d7460c329aa56662e0749d0313e83bcdbb4d9c0e8923edd1d95aac188afbc84c3a6f3b1f552726b4761aea5

Malware Config

Signatures

  • Nitro

    A ransomware that demands Discord nitro gift codes to decrypt files.

  • Modifies extensions of user files 10 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 3 IoCs
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Modifies system certificate store 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 41 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\21b111a98beb3fade37bdff4abd0e8ce.exe
    "C:\Users\Admin\AppData\Local\Temp\21b111a98beb3fade37bdff4abd0e8ce.exe"
    1⤵
    • Modifies extensions of user files
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Modifies system certificate store
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1644
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1936
      • C:\Windows\SysWOW64\Wbem\WMIC.exe
        wmic csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:680

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/680-64-0x0000000000000000-mapping.dmp

  • memory/1644-60-0x0000000000050000-0x0000000000051000-memory.dmp

    Filesize

    4KB

  • memory/1644-62-0x0000000075041000-0x0000000075043000-memory.dmp

    Filesize

    8KB

  • memory/1644-65-0x0000000003FF0000-0x0000000003FF1000-memory.dmp

    Filesize

    4KB

  • memory/1644-66-0x0000000003FF5000-0x0000000004006000-memory.dmp

    Filesize

    68KB

  • memory/1936-63-0x0000000000000000-mapping.dmp