Resubmissions

19-06-2024 09:06

240619-k2rczssbpk 3

19-06-2024 09:04

240619-k1q1tsxfke 3

Analysis

  • max time kernel
    59s
  • max time network
    52s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19-06-2024 09:04

General

  • Target

    cch_blum_re.pyc

  • Size

    7KB

  • MD5

    b3b9b54ddc84df18135852ee3ede2383

  • SHA1

    6841a45353951cbbb8a9bb7a8489a1ab43ce4669

  • SHA256

    b8e5ae90d66993923b851d0aeb26c0031b56f46a7151d71a0fee2b77bd9bf691

  • SHA512

    86db3c0eba1533bbe3ca62c324106e199756c09aa5477ab90c0711c28cc01fade9f87f89ebba78117102775194b0a197f95f93c95a8e5ec7c3a0295d494dee68

  • SSDEEP

    192:8w5Cpjqg1Bo123UpK/PIFwH7GSPFy0xg60GeA:sWmK23UpK/P/bG8aA

Score
3/10

Malware Config

Signatures

  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 64 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 6 IoCs
  • Suspicious use of FindShellTrayWindow 25 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 27 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\cmd.exe
    cmd /c C:\Users\Admin\AppData\Local\Temp\cch_blum_re.pyc
    1⤵
    • Modifies registry class
    PID:2928
  • C:\Windows\system32\OpenWith.exe
    C:\Windows\system32\OpenWith.exe -Embedding
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:1852
    • C:\Windows\system32\NOTEPAD.EXE
      "C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\AppData\Local\Temp\cch_blum_re.pyc
      2⤵
      • Modifies registry class
      • Opens file in notepad (likely ransom note)
      • Suspicious use of SetWindowsHookEx
      PID:3292
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --profile-directory=Default
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4568
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0x11c,0x120,0x124,0xf8,0x128,0x7ff9bbe846f8,0x7ff9bbe84708,0x7ff9bbe84718
      2⤵
        PID:2608
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2088 /prefetch:2
        2⤵
          PID:4956
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2220 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:2220
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2716 /prefetch:8
          2⤵
            PID:4288
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3516 /prefetch:1
            2⤵
              PID:2928
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3324 /prefetch:1
              2⤵
                PID:4756
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5060 /prefetch:1
                2⤵
                  PID:4376
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4776 /prefetch:1
                  2⤵
                    PID:4872
                  • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5616 /prefetch:8
                    2⤵
                      PID:4760
                    • C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\92.0.902.67\identity_helper.exe" --type=utility --utility-sub-type=winrt_app_id.mojom.WinrtAppIdService --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5616 /prefetch:8
                      2⤵
                      • Suspicious behavior: EnumeratesProcesses
                      PID:4396
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5404 /prefetch:1
                      2⤵
                        PID:4128
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5768 /prefetch:1
                        2⤵
                          PID:1048
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --field-trial-handle=2108,4125822711329735225,10002601600192489685,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3680 /prefetch:8
                          2⤵
                          • Modifies registry class
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious behavior: GetForegroundWindowSpam
                          • Suspicious use of SetWindowsHookEx
                          PID:3896
                      • C:\Windows\System32\CompPkgSrv.exe
                        C:\Windows\System32\CompPkgSrv.exe -Embedding
                        1⤵
                          PID:4128
                        • C:\Windows\System32\CompPkgSrv.exe
                          C:\Windows\System32\CompPkgSrv.exe -Embedding
                          1⤵
                            PID:4024

                          Network

                          MITRE ATT&CK Enterprise v15

                          Replay Monitor

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                          Downloads

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                            Filesize

                            152B

                            MD5

                            4b4f91fa1b362ba5341ecb2836438dea

                            SHA1

                            9561f5aabed742404d455da735259a2c6781fa07

                            SHA256

                            d824b742eace197ddc8b6ed5d918f390fde4b0fbf0e371b8e1f2ed40a3b6455c

                            SHA512

                            fef22217dcdd8000bc193e25129699d4b8f7a103ca4fe1613baf73ccf67090d9fbae27eb93e4bb8747455853a0a4326f2d0c38df41c8d42351cdcd4132418dac

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat

                            Filesize

                            152B

                            MD5

                            eaa3db555ab5bc0cb364826204aad3f0

                            SHA1

                            a4cdfaac8de49e6e6e88b335cfeaa7c9e3c563ca

                            SHA256

                            ef7baeb1b2ab05ff3c5fbb76c2759db49294654548706c7c8e87f0cde855b86b

                            SHA512

                            e13981da51b52c15261ecabb98af32f9b920651b46b10ce0cc823c5878b22eb1420258c80deef204070d1e0bdd3a64d875ac2522e3713a3cf11657aa55aeccd4

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                            Filesize

                            5KB

                            MD5

                            d5950defb467d6a4cbfb9870d6b2188e

                            SHA1

                            a2d13594a1de6c497368889abf0a78b6b7ba5065

                            SHA256

                            a4ebef0194fe0e1f572b70586d71006f84522906edeeac1896f84764e2759575

                            SHA512

                            8b8802de50e0d9ad274afe63c5ac8b531fa512466f7f321ca8a1f5c09a89a8e856a8fd4e343c5595a9b5002babe472737ce62b3b842fee0f0c3a15cd0c5015cc

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                            Filesize

                            6KB

                            MD5

                            33c1750abd15c38a0b675565186165c1

                            SHA1

                            798e3055bcc7ca5ef436773b07493451d2b8fbac

                            SHA256

                            6ddf9ea9e936ad00b4662f819d00e38f8fec3bf996d40c5e33246082e6131e2d

                            SHA512

                            6af61dd9e3ce934f677950fa3ae759e1af383c4110bbcd492fd47e6403c616c6965743c3b3ad648d0eb2f9d78c0b11675aefe6fb0340ad955526b2291924cbfb

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences

                            Filesize

                            6KB

                            MD5

                            43216286c0e4ec02c644dfaf1f12e58f

                            SHA1

                            508add40995c43aaee552de1d609edd6c7425a2a

                            SHA256

                            c5b4f9ef129ea740459f6d855321d5d579b4da0a3ea2dec47fca371e8c080804

                            SHA512

                            3b2917f0ec2b4683265a3e825aca20cf9d394ef0b0b1aa86b0cde69b07c07609b0945ced7a528827055739b8339a7ad6b8ba29dfc8fc74aeb5d58799fb5ce2fe

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT

                            Filesize

                            16B

                            MD5

                            6752a1d65b201c13b62ea44016eb221f

                            SHA1

                            58ecf154d01a62233ed7fb494ace3c3d4ffce08b

                            SHA256

                            0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd

                            SHA512

                            9cfd838d3fb570b44fc3461623ab2296123404c6c8f576b0de0aabd9a6020840d4c9125eb679ed384170dbcaac2fa30dc7fa9ee5b77d6df7c344a0aa030e0389

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

                            Filesize

                            10KB

                            MD5

                            fc409bfde5a7ff85171298605c8521f9

                            SHA1

                            087a84233a65ac3ae9b6bbc8f660318f0dcc375b

                            SHA256

                            ed79a33e9e8ddc7fe7a05ccbb2e9d3a9b1e7352426ad35790ea6d5150d6e5f28

                            SHA512

                            ea78f6bc918ac7929e355eb65a5a78faac49ed7ee0eb4d6b83e9a5ff57cab7a9d8cc87e7ad4003f726bf93bcac2629df8921dbfefcf38904868ec92d238a2546

                          • C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State

                            Filesize

                            10KB

                            MD5

                            f2b5c50ed08a7a659f1078ccbaabab1e

                            SHA1

                            c9ed7d31623cb77397f7895868cdef39a74c3202

                            SHA256

                            91ee235d7b6cff1798f33ec5d9a8a698ddfaf7e5aace9339711596f03e14da68

                            SHA512

                            9f418eebbcd1cbfd469e87ead380b0f0033aa60e0d265da4456296d5459ace732ab149cc1052fa478b94e103c8fc9df226dc1e9d46f626c2e8b8c8aa6e3dfbbc

                          • \??\pipe\LOCAL\crashpad_4568_KOBZIWQLHHMIGXVU

                            MD5

                            d41d8cd98f00b204e9800998ecf8427e

                            SHA1

                            da39a3ee5e6b4b0d3255bfef95601890afd80709

                            SHA256

                            e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                            SHA512

                            cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e