Resubmissions

19-02-2024 21:33

240219-1d7caseb85 10

Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231129-en
  • resource tags

    arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
  • submitted
    19-02-2024 21:33

General

  • Target

    NitroRansomware.exe

  • Size

    61KB

  • MD5

    f1c0ee2aa52d41fcd36be766ae6e4f36

  • SHA1

    654786fbdf440f1270453265a77d9000ec4516b7

  • SHA256

    be19e89787043f5f1801c993ecd99515a4e3bd0cdae098b64d90c2ce7dd47598

  • SHA512

    86c768588cc1f4fac53b35dafd08f21726773e1f730c931c42d3b38cb66c3f88c40413374f4a1b489555d067cbebb75e4112a3bf9465b50815aea9c77b2ea1d8

  • SSDEEP

    768:7FCY5Jrg9Jl7M9ZkiANIZaZ6YLDwUzc80gmq3oP/oDU:7FqNM9ZkiAaWr/0O8/ow

Malware Config

Signatures

  • Nitro

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

  • Renames multiple (96) files with added filename extension

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

  • 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) 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 6 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
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 41 IoCs
  • Suspicious use of WriteProcessMemory 8 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\NitroRansomware.exe
    "C:\Users\Admin\AppData\Local\Temp\NitroRansomware.exe"
    1⤵
    • Adds Run key to start application
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2724
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2172
      • C:\Windows\SysWOW64\Wbem\WMIC.exe
        wmic csproduct get uuid
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2352

Network

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

2
T1112

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Impact

Defacement

1
T1491

Replay Monitor

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Downloads

  • memory/2724-0-0x0000000000DD0000-0x0000000000DE6000-memory.dmp
    Filesize

    88KB

  • memory/2724-1-0x0000000074120000-0x000000007480E000-memory.dmp
    Filesize

    6.9MB

  • memory/2724-2-0x0000000000B30000-0x0000000000B70000-memory.dmp
    Filesize

    256KB

  • memory/2724-55-0x0000000074120000-0x000000007480E000-memory.dmp
    Filesize

    6.9MB

  • memory/2724-61-0x0000000000B30000-0x0000000000B70000-memory.dmp
    Filesize

    256KB

  • memory/2724-104-0x0000000000B30000-0x0000000000B70000-memory.dmp
    Filesize

    256KB

  • memory/2724-105-0x0000000000B30000-0x0000000000B70000-memory.dmp
    Filesize

    256KB

  • memory/2724-106-0x0000000074120000-0x000000007480E000-memory.dmp
    Filesize

    6.9MB