Analysis

  • max time kernel
    83s
  • max time network
    166s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    12-08-2021 11:18

General

  • Target

    23cb7de182b1553bbdd9c4066c7d1f3f.exe

  • Size

    42KB

  • MD5

    23cb7de182b1553bbdd9c4066c7d1f3f

  • SHA1

    64fbafd3b5f5bba8ac5a664ae5534bf19edf1ed5

  • SHA256

    7cca9ea23ca57d8ed6ac3f9a13b193703c04475c274920861edbfea78b4e44aa

  • SHA512

    913b2cac23a69f9f2b0bff39b445acfdd38fdeecd29e9838783c1563e23674a515c48da954648f8f89414da8e2734b80397eeb168594295f79b513110955ac67

Malware Config

Signatures

  • Nitro

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

  • Modifies extensions of user files 12 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\23cb7de182b1553bbdd9c4066c7d1f3f.exe
    "C:\Users\Admin\AppData\Local\Temp\23cb7de182b1553bbdd9c4066c7d1f3f.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:1824
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1980
      • C:\Windows\SysWOW64\Wbem\WMIC.exe
        wmic csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:992

Network

MITRE ATT&CK Matrix ATT&CK v6

Persistence

Registry Run Keys / Startup Folder

1
T1060

Defense Evasion

Modify Registry

3
T1112

Install Root Certificate

1
T1130

Impact

Defacement

1
T1491

Replay Monitor

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Downloads

  • memory/992-64-0x0000000000000000-mapping.dmp
  • memory/1824-60-0x00000000003C0000-0x00000000003C1000-memory.dmp
    Filesize

    4KB

  • memory/1824-62-0x00000000003D0000-0x00000000003E0000-memory.dmp
    Filesize

    64KB

  • memory/1824-65-0x0000000004C50000-0x0000000004C51000-memory.dmp
    Filesize

    4KB

  • memory/1824-66-0x0000000004C55000-0x0000000004C66000-memory.dmp
    Filesize

    68KB

  • memory/1980-63-0x0000000000000000-mapping.dmp