Overview

overview

10

Static

static

10

Document.doc.scr

windows7-x64

9

Document.doc.scr

windows10-2004-x64

9

Analysis

  • max time kernel
    148s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240419-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/04/2024, 01:37

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General

  • Target
    Document.doc.scr
  • Size 194KB
  • Sample240427-b19cqsgd27
  • SHA256 41e187191625d749b89a11bc04fc0b2a3b9bd638035d05b39365c47ab36d1898
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10
ransomwarespywarestealer

Malware Config

Signatures

  • Renames multiple (629) files with added filename extension

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

    ransomware
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spywarestealer
  • Drops desktop.ini file(s) 2 IoCs
  • Drops file in System32 directory 4 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 2 IoCs
    ransomware
  • Suspicious use of NtSetInformationThreadHideFromDebugger 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Checks processor information in registry 2 TTPs 3 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies Control Panel 2 IoCs
    evasion
  • Modifies registry class 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: RenamesItself 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 13 IoCs
  • Suspicious use of WriteProcessMemory 11 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Document.doc.scr
    "C:\Users\Admin\AppData\Local\Temp\Document.doc.scr" /S
    1⤵
    • Drops desktop.ini file(s)
    • Sets desktop wallpaper using registry
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:8
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:2360
    • C:\ProgramData\6B3E.tmp
      "C:\ProgramData\6B3E.tmp"
      2⤵
      • Checks computer location settings
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:4356
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\6B3E.tmp >> NUL
        3⤵
          PID:4568
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
      1⤵
        PID:4780
      • C:\Windows\system32\printfilterpipelinesvc.exe
        C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
        1⤵
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:1912
        • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
          /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{29AB9483-7A9C-4752-A8EF-278DCFF1D6C6}.xps" 133586554795610000
          2⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of SetWindowsHookEx
          PID:3808

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            desktop.ini
            • Path C:\$Recycle.Bin\S-1-5-21-17203666-93769886-2545153620-1000\desktop.ini
            • Size 129B
            • SHA256 037ad44ba34330fdb56f726c029d3915dcd30ac5c17dc041c9b4f32631d33879
            • MD5 SHA1 SHA512
            Submit Download

            AAtvmKv4L.README.txt
            • Path C:\AAtvmKv4L.README.txt
            • Size 434B
            • SHA256 192d1e6078570865531e8a4c9840a483c4a2ac35fe468107284991f6da813191
            • MD5 SHA1 SHA512
            Submit Download

            6B3E.tmp
            • Path C:\ProgramData\6B3E.tmp
            • Size 14KB
            • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            DDDDDDDDDDDDDDDD
            • Path C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDD
            • Size 194KB
            • SHA256 d3bc801e2096010e40fa4b813876a0a7179fa1a33b612405fbd75eeb2d9ed509
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            {DC5672CD-AD56-4FDA-84EE-2003E696AEEF}
            • Path C:\Users\Admin\AppData\Local\Temp\{DC5672CD-AD56-4FDA-84EE-2003E696AEEF}
            • Size 4KB
            • SHA256 cbb9fc7dce153e152f9a8e772c35e8fbaae39af6afad4cd8589bed35121fc073
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            Open Notebook.onetoc2
            • Path C:\Users\Admin\Documents\OneNote Notebooks\My Notebook\Open Notebook.onetoc2
            • Size 4KB
            • SHA256 42a4c306fbbb60facd9735091b54ae784fc5f5449fbf134273e845c40d0f52b9
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            DDDDDDDDDDD
            • Path F:\$RECYCLE.BIN\S-1-5-21-17203666-93769886-2545153620-1000\DDDDDDDDDDD
            • Size 129B
            • SHA256 802960b9499e1f227dd99d9ee453c20efe34cb8dd4d2837572ceb3d1060348e5
            • MD5 SHA1 SHA512
            Submit Download

            memory/8-0-0x0000000000530000-0x0000000000540000-memory.dmp
            Download

            memory/8-2-0x0000000000530000-0x0000000000540000-memory.dmp
            Download

            memory/8-1-0x0000000000530000-0x0000000000540000-memory.dmp
            Download

            memory/3808-2828-0x00007FFB91470000-0x00007FFB91480000-memory.dmp
            Download

            memory/3808-2829-0x00007FFB91470000-0x00007FFB91480000-memory.dmp
            Download

            memory/3808-2830-0x00007FFB91470000-0x00007FFB91480000-memory.dmp
            Download

            memory/3808-2827-0x00007FFB91470000-0x00007FFB91480000-memory.dmp
            Download

            memory/3808-2826-0x00007FFB91470000-0x00007FFB91480000-memory.dmp
            Download

            memory/3808-2859-0x00007FFB8EC20000-0x00007FFB8EC30000-memory.dmp
            Download

            memory/3808-2860-0x00007FFB8EC20000-0x00007FFB8EC30000-memory.dmp
            Download