Analysis

  • max time kernel
    119s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240508-en
  • resource tags

    arch:x64arch:x86image:win7-20240508-enlocale:en-usos:windows7-x64system
  • submitted
    21/05/2024, 15:22

General

  • Target
    Cryp_RAT.rtf
  • Size 662KB
  • Sample240521-sr92caad4w
  • SHA256 44b87df9f68f5a3084c7d80c1c7492ca5209e816a4e83fdbd6e2fcb6f1ff936f
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Path
  • C:\TdGeIqAUn.README.txt

  • lockbit

Ransom Note
  • ~~~ LockBit 3.0 the world's fastest ransomware since 2019~~~ >>>> Your data are stolen and encrypted The data will be published on TOR website if you do not pay the ransom If you not pay Payment:BITCOIN AFTER SEND BITCOIN Contact [email protected]

Signatures

  • Detect Neshta payload 7 IoCs
  • Lockbit

    Ransomware family with multiple variants released since late 2019.

  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • Renames multiple (365) files with added filename extension

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

  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 32 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 2 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 2 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Control Panel 2 IoCs
  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: RenamesItself 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 37 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\Cryp_RAT.rtf"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:1964
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Launches Equation Editor
    PID:3028
  • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
    "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
    1⤵
    • Launches Equation Editor
    • Suspicious use of WriteProcessMemory
    PID:2672
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /c%tmp%\Client.exe A C
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2664
      • C:\Users\Admin\AppData\Local\Temp\Client.exe
        C:\Users\Admin\AppData\Local\Temp\Client.exe A C
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Modifies system executable filetype association
        • Drops file in Program Files directory
        • Drops file in Windows directory
        • Suspicious use of WriteProcessMemory
        PID:2704
        • C:\Users\Admin\AppData\Local\Temp\3582-490\Client.exe
          "C:\Users\Admin\AppData\Local\Temp\3582-490\Client.exe" A C
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          • Suspicious use of SetThreadContext
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2568
          • C:\Users\Admin\AppData\Local\Temp\3582-490\Client.exe
            "C:\Users\Admin\AppData\Local\Temp\3582-490\Client.exe"
            5⤵
            • Executes dropped EXE
            • Loads dropped DLL
            • Drops desktop.ini file(s)
            • Sets desktop wallpaper using registry
            • Modifies Control Panel
            • Modifies registry class
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: RenamesItself
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1732
            • C:\ProgramData\496F.tmp
              "C:\ProgramData\496F.tmp"
              6⤵
              • Executes dropped EXE
              • Suspicious use of NtSetInformationThreadHideFromDebugger
              • Suspicious use of WriteProcessMemory
              PID:1536
              • C:\Windows\svchost.com
                "C:\Windows\svchost.com" "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\496F.tmp >> NUL
                7⤵
                • Executes dropped EXE
                • Loads dropped DLL
                • Drops file in Program Files directory
                • Drops file in Windows directory
                • Suspicious use of WriteProcessMemory
                PID:840
                • C:\Windows\SysWOW64\cmd.exe
                  C:\Windows\System32\cmd.exe /C DEL /F /Q C:\PROGRA~3\496F.tmp >> NUL
                  8⤵
                    PID:2940
    • C:\Windows\system32\AUDIODG.EXE
      C:\Windows\system32\AUDIODG.EXE 0x148
      1⤵
        PID:264

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            desktop.ini

            • Path C:\$Recycle.Bin\S-1-5-21-2737914667-933161113-3798636211-1000\desktop.ini
            • Size 129B
            • SHA256 17eae72a7e16b9a5bb9eba572457853e86d6f13b64a71041f74031385a7a949c
            • MD5 SHA1 SHA512

            DW20.EXE

            • Path C:\MSOCache\ALLUSE~1\{90140~1\DW20.EXE
            • Size 859KB
            • SHA256 ead58c483cb20bcd57464f8a4929079539d634f469b213054bf737d227c026dc
            • MD5 SHA1 SHA512 SSDEEP

            TdGeIqAUn.README.txt

            • Path C:\TdGeIqAUn.README.txt
            • Size 289B
            • SHA256 a0c4eeae47956b19b2667ae5c94a154fc5002a78dea22e028049ece1d7a0c920
            • MD5 SHA1 SHA512

            FC0511BC.wmf

            • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\Temporary Internet Files\Content.MSO\FC0511BC.wmf
            • Size 316B
            • SHA256 9639441a9d36e7e4fda980961b75eeb334540b8cfbcee71eb3cd857e0a838e0c
            • MD5 SHA1 SHA512

            EEEEEEEEEE

            • Path C:\Users\Admin\AppData\Local\Temp\3582-490\EEEEEEEEEE
            • Size 282KB
            • SHA256 374c837398a9f6948d10ada457996c52baaa269442c9f0d29e206f0663a34d87
            • MD5 SHA1 SHA512 SSDEEP

            Client.exe

            • Path C:\Users\Admin\AppData\Local\Temp\Client.exe
            • Size 323KB
            • SHA256 f6c559c031b7b16b1edf34b38e74b6bf3a7106ca34881d7f5c63b8e0d7ac3694
            • MD5 SHA1 SHA512 SSDEEP

            ~$yp_RAT.rtf

            • Path C:\Users\Admin\AppData\Local\Temp\~$yp_RAT.rtf
            • Size 162B
            • SHA256 5539dec4d5053baed5c2c2f331ae97ecc7972cc801df6145f020648c25cbe01b
            • MD5 SHA1 SHA512

            svchost.com

            • Path C:\Windows\svchost.com
            • Size 40KB
            • SHA256 91a8a010b76f69ec29934c4d0fa207c54850daa5941aeccea941d46e0525fc27
            • MD5 SHA1 SHA512 SSDEEP

            DDDDDDDDDDD

            • Path F:\$RECYCLE.BIN\S-1-5-21-2737914667-933161113-3798636211-1000\DDDDDDDDDDD
            • Size 129B
            • SHA256 b71be3ead5e9c46d88ef0d9140600ffaf7413312a537aecc15ca824f0d39e9a2
            • MD5 SHA1 SHA512

            LOGTRA~1.EXE

            • Path \PROGRA~2\Adobe\READER~1.0\Reader\LOGTRA~1.EXE
            • Size 252KB
            • SHA256 8899b4ed3446b7d55b54defbc1acb7c5392a4b3bc8ec2cdc7c31171708965043
            • MD5 SHA1 SHA512 SSDEEP

            496F.tmp

            • Path \ProgramData\496F.tmp
            • Size 14KB
            • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
            • MD5 SHA1 SHA512 SSDEEP

            Client.exe

            • Path \Users\Admin\AppData\Local\Temp\3582-490\Client.exe
            • Size 282KB
            • SHA256 f00b211b5f93e23409e9383930c79990949b3671b1c1e0dc00208bb1c8f1e10d
            • MD5 SHA1 SHA512 SSDEEP

            ose00000.exe

            • Path \Users\Admin\AppData\Local\Temp\ose00000.exe
            • Size 145KB
            • SHA256 70964a0ed9011ea94044e15fa77edd9cf535cc79ed8e03a3721ff007e69595cc
            • MD5 SHA1 SHA512 SSDEEP

            memory/840-1144-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/840-1146-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/1732-48-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-1044-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-44-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-53-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-55-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-40-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-42-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-36-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-63-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-60-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-205-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-46-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-268-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-50-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            memory/1732-51-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-1023-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-1022-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-1047-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-1046-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1732-38-0x0000000000400000-0x0000000000428000-memory.dmp

            memory/1964-0-0x000000002F9F1000-0x000000002F9F2000-memory.dmp

            memory/1964-71-0x000000007183D000-0x0000000071848000-memory.dmp

            memory/1964-2-0x000000007183D000-0x0000000071848000-memory.dmp

            memory/1964-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

            memory/2568-34-0x00000000008C0000-0x00000000008D2000-memory.dmp

            memory/2568-25-0x0000000000E90000-0x0000000000EDC000-memory.dmp

            memory/2704-1143-0x0000000000400000-0x000000000041B000-memory.dmp

            memory/2704-1148-0x0000000000400000-0x000000000041B000-memory.dmp