Analysis

  • max time kernel
    143s
  • max time network
    151s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • submitted
    27/05/2021, 18:52

General

  • Target
    6363b3bab3526372ad619ec540fb8588.exe
  • Size 817KB
  • Sample210527-5d2gddp8fe
  • SHA256 f88fe1b342fccf45f31b05388bbb7398da0f175ba15bf6f1d7ae367ef41aa200
  • MD5 SHA1 SHA512

Malware Config

Extracted

Path
  • C:\_readme.txt

Ransom Note
  • ATTENTION! Don't worry, you can return all your files! All your files like pictures, databases, documents and other important are encrypted with strongest encryption and unique key. The only method of recovering files is to purchase decrypt tool and unique key for you. This software will decrypt all your encrypted files. What guarantees you have? You can send one of your encrypted file from your PC and we decrypt it for free. But we can decrypt only 1 file for free. File must not contain valuable information. You can get and look video overview decrypt tool: https://we.tl/t-IMhsjaUZQE Price of private key and decrypt software is $980. Discount 50% available if you contact us first 72 hours, that's price for you is $490. Please note that you'll never restore your data without payment. Check your e-mail "Spam" or "Junk" folder if you don't get answer more than 6 hours. To get this software you need write on our e-mail: [email protected] Reserve e-mail address to contact us: [email protected] Your personal ID: 0299ewgfDdMVRPbSnFtySupDwbPHDki6lHhdaU8yRerXrXB00l
URLs
  • https://we.tl/t-IMhsjaUZQE

Extracted

Family
  • raccoon

Botnet
  • 1d76a465540f6a904ac9f1310fe3a3824b5b4549

Attributes
  • url4cnc

    https://tttttt.me/kokajakprozak

rc4.plain
rc4.plain

Signatures

  • Deletes Windows Defender Definitions 2 TTPs 1 IoCs

    Uses mpcmdrun utility to delete all AV definitions.

  • Raccoon

    Simple but powerful infostealer which was very active in 2019.

  • Disables Task Manager via registry modification
  • Downloads MZ/PE file
  • Drops file in Drivers directory 1 IoCs
  • Executes dropped EXE 7 IoCs
  • Modifies extensions of user files 11 IoCs

    Ransomware generally changes the extension on encrypted files.

  • Loads dropped DLL 6 IoCs
  • Modifies file permissions 1 TTPs 1 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • 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
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Looks up external IP address via web service 5 IoCs

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

  • Suspicious use of SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Delays execution with timeout.exe 1 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 18 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\6363b3bab3526372ad619ec540fb8588.exe
    "C:\Users\Admin\AppData\Local\Temp\6363b3bab3526372ad619ec540fb8588.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3872
    • C:\Users\Admin\AppData\Local\Temp\6363b3bab3526372ad619ec540fb8588.exe
      "C:\Users\Admin\AppData\Local\Temp\6363b3bab3526372ad619ec540fb8588.exe"
      2⤵
      • Adds Run key to start application
      • Modifies system certificate store
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:3156
      • C:\Windows\SysWOW64\icacls.exe
        icacls "C:\Users\Admin\AppData\Local\24a524dd-e253-41f2-b5d1-3cdaa141ffe5" /deny *S-1-1-0:(OI)(CI)(DE,DC)
        3⤵
        • Modifies file permissions
        PID:4024
      • C:\Users\Admin\AppData\Local\Temp\6363b3bab3526372ad619ec540fb8588.exe
        "C:\Users\Admin\AppData\Local\Temp\6363b3bab3526372ad619ec540fb8588.exe" --Admin IsNotAutoStart IsNotTask
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:8
        • C:\Users\Admin\AppData\Local\Temp\6363b3bab3526372ad619ec540fb8588.exe
          "C:\Users\Admin\AppData\Local\Temp\6363b3bab3526372ad619ec540fb8588.exe" --Admin IsNotAutoStart IsNotTask
          4⤵
          • Modifies extensions of user files
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of WriteProcessMemory
          PID:1852
          • C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\updatewin1.exe
            "C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\updatewin1.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of WriteProcessMemory
            PID:1704
            • C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\updatewin1.exe
              "C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\updatewin1.exe" --Admin
              6⤵
              • Executes dropped EXE
              • Suspicious use of WriteProcessMemory
              PID:3496
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                powershell -Command Set-ExecutionPolicy -Scope CurrentUser RemoteSigned
                7⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:3392
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                powershell -NoProfile -ExecutionPolicy Bypass -Command "& {Start-Process PowerShell -ArgumentList '-NoProfile -ExecutionPolicy Bypass -File ""C:\Users\Admin\AppData\Local\script.ps1""' -Verb RunAs}"
                7⤵
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of WriteProcessMemory
                PID:1848
                • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoProfile -ExecutionPolicy Bypass -File "C:\Users\Admin\AppData\Local\script.ps1
                  8⤵
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  PID:2160
              • C:\Program Files\Windows Defender\mpcmdrun.exe
                "C:\Program Files\Windows Defender\mpcmdrun.exe" -removedefinitions -all
                7⤵
                • Deletes Windows Defender Definitions
                PID:740
              • C:\Windows\SysWOW64\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\delself.bat""
                7⤵
                  PID:2700
            • C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\updatewin2.exe
              "C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\updatewin2.exe"
              5⤵
              • Drops file in Drivers directory
              • Executes dropped EXE
              PID:2772
            • C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\5.exe
              "C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\5.exe"
              5⤵
              • Executes dropped EXE
              • Suspicious use of SetThreadContext
              • Suspicious use of WriteProcessMemory
              PID:4024
              • C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\5.exe
                "C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\5.exe"
                6⤵
                • Executes dropped EXE
                • Loads dropped DLL
                • Suspicious use of WriteProcessMemory
                PID:4032
                • C:\Windows\SysWOW64\cmd.exe
                  cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\077472c3-c019-4bce-952f-6b01b51dba81\5.exe"
                  7⤵
                    PID:352
                    • C:\Windows\SysWOW64\timeout.exe
                      timeout /T 10 /NOBREAK
                      8⤵
                      • Delays execution with timeout.exe
                      PID:1796
      • C:\Users\Admin\AppData\Local\24a524dd-e253-41f2-b5d1-3cdaa141ffe5\6363b3bab3526372ad619ec540fb8588.exe
        C:\Users\Admin\AppData\Local\24a524dd-e253-41f2-b5d1-3cdaa141ffe5\6363b3bab3526372ad619ec540fb8588.exe --Task
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        PID:1680
        • C:\Users\Admin\AppData\Local\24a524dd-e253-41f2-b5d1-3cdaa141ffe5\6363b3bab3526372ad619ec540fb8588.exe
          C:\Users\Admin\AppData\Local\24a524dd-e253-41f2-b5d1-3cdaa141ffe5\6363b3bab3526372ad619ec540fb8588.exe --Task
          2⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:2168

      Network

            MITRE ATT&CK Enterprise v6

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            Downloads

            memory/1704-135-0x0000000000400000-0x000000000044D000-memory.dmp

            memory/1848-219-0x0000000004FD2000-0x0000000004FD3000-memory.dmp

            memory/1848-218-0x0000000004FD0000-0x0000000004FD1000-memory.dmp

            memory/1848-222-0x0000000004FD3000-0x0000000004FD4000-memory.dmp

            memory/1852-124-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/2160-229-0x000000007F210000-0x000000007F211000-memory.dmp

            memory/2160-230-0x0000000006993000-0x0000000006994000-memory.dmp

            memory/2160-228-0x0000000006992000-0x0000000006993000-memory.dmp

            memory/2160-227-0x0000000006990000-0x0000000006991000-memory.dmp

            memory/2168-243-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/2772-141-0x0000000000400000-0x000000000044D000-memory.dmp

            memory/3156-114-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3156-117-0x0000000000400000-0x0000000000537000-memory.dmp

            memory/3392-169-0x0000000009520000-0x0000000009553000-memory.dmp

            memory/3392-182-0x0000000009830000-0x0000000009831000-memory.dmp

            memory/3392-148-0x0000000007410000-0x0000000007411000-memory.dmp

            memory/3392-214-0x00000000070A6000-0x00000000070A8000-memory.dmp

            memory/3392-146-0x0000000004E10000-0x0000000004E11000-memory.dmp

            memory/3392-212-0x000000007E6D0000-0x000000007E6D1000-memory.dmp

            memory/3392-213-0x00000000070A3000-0x00000000070A4000-memory.dmp

            memory/3392-147-0x00000000076E0000-0x00000000076E1000-memory.dmp

            memory/3392-157-0x00000000070A2000-0x00000000070A3000-memory.dmp

            memory/3392-181-0x0000000009670000-0x0000000009671000-memory.dmp

            memory/3392-176-0x0000000009500000-0x0000000009501000-memory.dmp

            memory/3392-150-0x00000000075B0000-0x00000000075B1000-memory.dmp

            memory/3392-161-0x0000000008590000-0x0000000008591000-memory.dmp

            memory/3392-151-0x0000000007E80000-0x0000000007E81000-memory.dmp

            memory/3392-149-0x0000000007E10000-0x0000000007E11000-memory.dmp

            memory/3392-160-0x00000000082C0000-0x00000000082C1000-memory.dmp

            memory/3392-155-0x00000000070A0000-0x00000000070A1000-memory.dmp

            memory/3392-156-0x0000000008270000-0x0000000008271000-memory.dmp

            memory/3496-145-0x0000000000400000-0x000000000044D000-memory.dmp

            memory/3872-116-0x0000000002250000-0x000000000236B000-memory.dmp

            memory/4024-158-0x0000000002160000-0x00000000021F1000-memory.dmp

            memory/4032-159-0x0000000000400000-0x0000000000492000-memory.dmp

            memory/4032-152-0x0000000000400000-0x0000000000492000-memory.dmp