Analysis

  • max time kernel
    88s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    29-08-2024 10:24

General

  • Target

    WinRAR.exe

  • Size

    270KB

  • MD5

    14ea366be5cb691078be2c302590f435

  • SHA1

    84e562bb99249a58849f6f82b29a7746dd144900

  • SHA256

    82e6b71b99a6ec602cfbdc00e0bbaf34c719d7b6879b6e384004886d491ad45a

  • SHA512

    9be5097295010fa04e04fcae578b19ab43935b09a70d8b31a038fd1ef7ed89dcd9143b82400e8d31913bf32a7a18628557dfaa1f4d37c1e7c8062d7a7368afb9

  • SSDEEP

    6144:r02q9t3hysg2+00aHYHjdCoD5oa+S/dIm:Aj3hBg/00aHYDd3DCO/dI

Malware Config

Extracted

Path

C:\Users\Admin\AppData\Local\Google\Chrome\User Data\NOTE!.txt

Ransom Note
Don't worry, you can return all your files! All your files like documents, photos, databases and other important are encrypted What guarantees do we give to you? You can send 3 of your encrypted files and we decrypt it for free. You must follow these steps To decrypt your files : 1) Write on our e-mail :[email protected] ( In case of no answer in 24 hours check your spam folder or write us to this e-mail: [email protected]) 2) Obtain Bitcoin (You have to pay for decryption in Bitcoins. After payment we will send you the tool that will decrypt all your files.)

Signatures

  • Chaos

    Ransomware family first seen in June 2021.

  • Chaos Ransomware 3 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Deletes backup catalog 3 TTPs 1 IoCs

    Uses wbadmin.exe to inhibit system recovery.

  • Disables Task Manager via registry modification
  • Drops startup file 2 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops desktop.ini file(s) 64 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Suspicious behavior: AddClipboardFormatListener 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 52 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\WinRAR.exe
    "C:\Users\Admin\AppData\Local\Temp\WinRAR.exe"
    1⤵
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2036
    • C:\Users\Admin\AppData\Roaming\WinRAR.exe
      "C:\Users\Admin\AppData\Roaming\WinRAR.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops desktop.ini file(s)
      • Sets desktop wallpaper using registry
      • Suspicious behavior: AddClipboardFormatListener
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2316
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /all /quiet & wmic shadowcopy delete
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2144
        • C:\Windows\system32\vssadmin.exe
          vssadmin delete shadows /all /quiet
          4⤵
          • Interacts with shadow copies
          PID:2740
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2776
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C wbadmin delete catalog -quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2732
        • C:\Windows\system32\wbadmin.exe
          wbadmin delete catalog -quiet
          4⤵
          • Deletes backup catalog
          PID:1960
      • C:\Windows\system32\NOTEPAD.EXE
        "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Roaming\NOTE!.txt
        3⤵
          PID:2804
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2860
    • C:\Windows\system32\wbengine.exe
      "C:\Windows\system32\wbengine.exe"
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:2032
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:2680
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
          PID:1748
        • C:\Windows\system32\taskmgr.exe
          "C:\Windows\system32\taskmgr.exe" /4
          1⤵
            PID:1212
          • C:\Windows\system32\taskmgr.exe
            "C:\Windows\system32\taskmgr.exe" /4
            1⤵
              PID:1788
            • C:\Windows\SysWOW64\DllHost.exe
              C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
              1⤵
              • System Location Discovery: System Language Discovery
              PID:2860
            • C:\Windows\system32\AUDIODG.EXE
              C:\Windows\system32\AUDIODG.EXE 0x500
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:1276
            • C:\Windows\system32\OptionalFeatures.exe
              "C:\Windows\system32\OptionalFeatures.exe"
              1⤵
                PID:3016

              Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

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              Downloads

              • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\NOTE!.txt

                Filesize

                595B

                MD5

                7cff3b94ef1413349cdf9d4742f9cd77

                SHA1

                0569d834acc4a41e0b47bc1d03dcf27430106096

                SHA256

                bb6cdcdbb8d8b17243cce8bc7c9d7eee1872b63313640e5d63c63619712ddd8d

                SHA512

                1425864a3944742df1f4f849455c3224e2ee281b4c19dbc46af180efaaa1fb35dc14ef047faa02ba92e3d8b5a33ad60cc65c7b4ea9e1182a5b91d01e9edd2873

              • C:\Users\Admin\AppData\Roaming\WinRAR.exe

                Filesize

                270KB

                MD5

                14ea366be5cb691078be2c302590f435

                SHA1

                84e562bb99249a58849f6f82b29a7746dd144900

                SHA256

                82e6b71b99a6ec602cfbdc00e0bbaf34c719d7b6879b6e384004886d491ad45a

                SHA512

                9be5097295010fa04e04fcae578b19ab43935b09a70d8b31a038fd1ef7ed89dcd9143b82400e8d31913bf32a7a18628557dfaa1f4d37c1e7c8062d7a7368afb9

              • C:\Users\Admin\Desktop\ConnectCompare.wav.h40j

                Filesize

                1.3MB

                MD5

                e23be7906863b50f424e0f38577fda17

                SHA1

                0a5e39433be3c2fc1da939cd2537209f181d31cf

                SHA256

                5acb728ee3b8e24595c14c01b73b50f7b541da03003fc17e2305d6c74dadf490

                SHA512

                8cbbf0d2120d4262c91b576398e500fa9db8ea654c4cd6c07ed92b91072033cde7fe2e392a1ae9f758a9713650be0cd9570c89f770410b0a395e4a0ea205cd98

              • C:\Users\Admin\Desktop\DenySuspend.gif

                Filesize

                1B

                MD5

                d1457b72c3fb323a2671125aef3eab5d

                SHA1

                5bab61eb53176449e25c2c82f172b82cb13ffb9d

                SHA256

                8a8de823d5ed3e12746a62ef169bcf372be0ca44f0a1236abc35df05d96928e1

                SHA512

                ca63c07ad35d8c9fb0c92d6146759b122d4ec5d3f67ebe2f30ddb69f9e6c9fd3bf31a5e408b08f1d4d9cd68120cced9e57f010bef3cde97653fed5470da7d1a0

              • C:\Users\Admin\Desktop\EnableRename.emf

                Filesize

                924KB

                MD5

                2744ef46e99ba36796ca60bbbe078c1e

                SHA1

                a6ba0d9bbf4c677fe104da12c21ab7ffbf7a1b29

                SHA256

                8e1fb12a10c3ba443e04d8689c2b53541ae55c2d9cbfcd02baeb356e275fc17d

                SHA512

                4b60640b1c7c4054ff6eb8e7ae1cab7bda06c3a695266c14e3bca12696b61de3766e583ffb898b39e2da6fe8466e1a6d6ae47f421b9ca833205d1bf6b97cc5c9

              • C:\Users\Admin\Desktop\SetPush.vdw

                Filesize

                1.3MB

                MD5

                ec2303274c779a17a381d607429b36f2

                SHA1

                635468c031d21bc0262c0bfb1f18373392914b6a

                SHA256

                827d39ec76441790ff3789defa536d4b83741201053146f206a34d4d6a123e11

                SHA512

                ee90584a34b5ef48589bbcd44c7e4dd33eadb338f1835f703d870ba34031b69ba97827dab7bbf6454ead5398aa854a451b0db5cfb28af33ff10da0da5c9e4875

              • C:\Users\Admin\Desktop\UnregisterWrite.m1v.s0f8

                Filesize

                681KB

                MD5

                ea91e2330ded94178fcd90a539ee1361

                SHA1

                c59d359103cab54db666665295f5958c9a45a27a

                SHA256

                68f31361e798b12121d4222597eca47cfc2bb1da0f5d685a9922e3400f37d717

                SHA512

                e2dc7279f89ce124dfccc51650f66c8d29923c324ec94d086b5aaaf2f58f23f8550c638257f1a6561fd3c4982ac7c1ce47511290e7d4cbb5121d64db82dbc685

              • memory/2036-9-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

                Filesize

                9.9MB

              • memory/2036-2-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

                Filesize

                9.9MB

              • memory/2036-0-0x000007FEF5D13000-0x000007FEF5D14000-memory.dmp

                Filesize

                4KB

              • memory/2036-1-0x0000000001240000-0x0000000001288000-memory.dmp

                Filesize

                288KB

              • memory/2316-8-0x0000000000D10000-0x0000000000D58000-memory.dmp

                Filesize

                288KB

              • memory/2316-10-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

                Filesize

                9.9MB

              • memory/2316-11-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

                Filesize

                9.9MB

              • memory/2316-862-0x000007FEF5D10000-0x000007FEF66FC000-memory.dmp

                Filesize

                9.9MB