Overview

overview

10

Static

static

10

cryptolaemus

windows10-2004-x64

9

cryptolaemus

windows11-21h2-x64

9

Analysis

  • max time kernel
    148s
  • max time network
    155s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240419-en
  • resource tags

    arch:x64arch:x86image:win11-20240419-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29/04/2024, 15:19

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General

  • Target
    a18a6bacc0d8b1dd4544cdf1e178a98a36b575b5be8b307c27c65455b1307616.exe
  • Size 194KB
  • Sample240429-sqcz8aeb4v
  • SHA256 a18a6bacc0d8b1dd4544cdf1e178a98a36b575b5be8b307c27c65455b1307616
  • MD5 SHA1 SHA512 SSDEEP
Score
9/10
ransomwarespywarestealer

Malware Config

Signatures

  • Renames multiple (536) files with added filename extension

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

    ransomware
  • 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\a18a6bacc0d8b1dd4544cdf1e178a98a36b575b5be8b307c27c65455b1307616.exe
    "C:\Users\Admin\AppData\Local\Temp\a18a6bacc0d8b1dd4544cdf1e178a98a36b575b5be8b307c27c65455b1307616.exe"
    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:4368
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
      • Drops file in System32 directory
      PID:2644
    • C:\ProgramData\95B9.tmp
      "C:\ProgramData\95B9.tmp"
      2⤵
      • Deletes itself
      • Executes dropped EXE
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: RenamesItself
      • Suspicious use of WriteProcessMemory
      PID:1672
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C DEL /F /Q C:\PROGRA~3\95B9.tmp >> NUL
        3⤵
          PID:4384
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k PrintWorkflow -s PrintWorkflowUserSvc
      1⤵
        PID:1536
      • C:\Windows\system32\printfilterpipelinesvc.exe
        C:\Windows\system32\printfilterpipelinesvc.exe -Embedding
        1⤵
        • Drops file in System32 directory
        • Suspicious use of WriteProcessMemory
        PID:1608
        • C:\Program Files\Microsoft Office\root\Office16\ONENOTE.EXE
          /insertdoc "C:\Users\Admin\AppData\Local\Microsoft\Windows\INetCache\{759867E6-0530-41F7-8AF5-EB46392AF5EF}.xps" 133588775812420000
          2⤵
          • Checks processor information in registry
          • Enumerates system info in registry
          • Suspicious use of SetWindowsHookEx
          PID:1708

      Network

            MITRE ATT&CK Enterprise v15

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            Downloads

            HHHHHHHHHHH
            • Path C:\$Recycle.Bin\S-1-5-21-293923083-2364846840-4256557006-1000\HHHHHHHHHHH
            • Size 129B
            • SHA256 04eee98c0fb471bd651b72e40f48d9a6a83f7b9b6382f24dd626f355958f5cb8
            • MD5 SHA1 SHA512
            Submit Download

            95B9.tmp
            • Path C:\ProgramData\95B9.tmp
            • Size 14KB
            • SHA256 917e115cc403e29b4388e0d175cbfac3e7e40ca1742299fbdb353847db2de7c2
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
            • Path C:\Users\Admin\AppData\Local\Temp\DDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDDD
            • Size 194KB
            • SHA256 d8cd19e363a3ed371e8e2f3000416ef866e8bcf3041bae6c923bb52db5306282
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            Open Notebook.onetoc2
            • Path C:\Users\Admin\Documents\OneNote Notebooks\My Notebook\Open Notebook.onetoc2
            • Size 4KB
            • SHA256 307e55e0c4cde1980e2d76bd292409a16da4fae7c2b5112a4850f859657bf832
            • MD5 SHA1 SHA512 SSDEEP
            Submit Download

            MIuB4Jpci.README.txt
            • Path C:\Users\MIuB4Jpci.README.txt
            • Size 434B
            • SHA256 192d1e6078570865531e8a4c9840a483c4a2ac35fe468107284991f6da813191
            • MD5 SHA1 SHA512
            Submit Download

            DDDDDDDDDDD
            • Path F:\$RECYCLE.BIN\S-1-5-21-293923083-2364846840-4256557006-1000\DDDDDDDDDDD
            • Size 129B
            • SHA256 caf2651b72b44e0d18b0c848d391b540a250ff09c5066cf347aea764263db41b
            • MD5 SHA1 SHA512
            Submit Download

            memory/1708-2784-0x00007FFF0D390000-0x00007FFF0D3A0000-memory.dmp
            Download

            memory/1708-2783-0x00007FFF0D390000-0x00007FFF0D3A0000-memory.dmp
            Download

            memory/1708-2785-0x00007FFF0D390000-0x00007FFF0D3A0000-memory.dmp
            Download

            memory/1708-2786-0x00007FFF0D390000-0x00007FFF0D3A0000-memory.dmp
            Download

            memory/1708-2782-0x00007FFF0D390000-0x00007FFF0D3A0000-memory.dmp
            Download

            memory/1708-2815-0x00007FFF0B100000-0x00007FFF0B110000-memory.dmp
            Download

            memory/1708-2816-0x00007FFF0B100000-0x00007FFF0B110000-memory.dmp
            Download

            memory/4368-1-0x0000000002CE0000-0x0000000002CF0000-memory.dmp
            Download

            memory/4368-2-0x0000000002CE0000-0x0000000002CF0000-memory.dmp
            Download

            memory/4368-0-0x0000000002CE0000-0x0000000002CF0000-memory.dmp
            Download