Overview

overview

6

Static

static

1

WINBLOCK.txt

windows7-x64

6

Analysis

  • max time kernel
    118s
  • max time network
    125s
  • platform
    windows7_x64
  • resource
    win7-20231215-en
  • resource tags

    arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
  • submitted
    03-02-2024 14:21

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General

  • Target

    WINBLOCK.txt

  • Size

    237B

  • MD5

    47eb57f351b25eae19fd32210cfa9221

  • SHA1

    ab6f95b8f61f1c605fa6b6f9b140a4ac42fadf67

  • SHA256

    44f795e15d82ecbabfb75b46b637ec0cb043ed52e70c3374fd7491d9f4aec7d1

  • SHA512

    b46f21f68757b2e92ccb8b825f01e680900ad7939df4c43b892c29bb946c5763c47fb78af19bbd0b6fe8a7fb7d839a0efb341a6d87fa52350d7be84c24b6f63a

Score
6/10
persistence

Malware Config

Signatures

  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Drops file in Windows directory 3 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Kills process with taskkill 1 IoCs
    evasion
  • Modifies registry class 64 IoCs
  • Opens file in notepad (likely ransom note) 1 IoCs
    ransomware
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 21 IoCs
  • Suspicious use of FindShellTrayWindow 51 IoCs
  • Suspicious use of SendNotifyMessage 48 IoCs
  • Suspicious use of SetWindowsHookEx 3 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Windows\system32\NOTEPAD.EXE
    C:\Windows\system32\NOTEPAD.EXE C:\Users\Admin\AppData\Local\Temp\WINBLOCK.txt
    1⤵
    • Drops file in Windows directory
    • Modifies registry class
    • Opens file in notepad (likely ransom note)
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of SetWindowsHookEx
    PID:2900
  • C:\Windows\SysWOW64\DllHost.exe
    C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
    1⤵
      PID:2628
    • 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 AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:268
      • 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=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef68b9758,0x7fef68b9768,0x7fef68b9778
        2⤵
          PID:696
        • C:\Program Files\Google\Chrome\Application\chrome.exe
          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1120 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:2
          2⤵
            PID:1952
          • C:\Program Files\Google\Chrome\Application\chrome.exe
            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=1508 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:8
            2⤵
              PID:460
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=1604 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:8
              2⤵
                PID:1520
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2228 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:1
                2⤵
                  PID:2172
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2304 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:1
                  2⤵
                    PID:2912
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1244 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:2
                    2⤵
                      PID:1500
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=3224 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:1
                      2⤵
                        PID:1112
                      • 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 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3440 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:8
                        2⤵
                          PID:2896
                        • 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 --lang=en-US --service-sandbox-type=service --mojo-platform-channel-handle=3424 --field-trial-handle=1216,i,11356471579096202293,7976774910755557872,131072 /prefetch:8
                          2⤵
                            PID:2344
                        • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                          "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                          1⤵
                            PID:1656
                          • C:\Windows\explorer.exe
                            "C:\Windows\explorer.exe"
                            1⤵
                              PID:1600
                            • C:\Windows\System32\control.exe
                              "C:\Windows\System32\control.exe" SYSTEM
                              1⤵
                                PID:2896
                              • C:\Windows\SysWOW64\DllHost.exe
                                C:\Windows\SysWOW64\DllHost.exe /Processid:{06622D85-6856-4460-8DE1-A81921B41C4B}
                                1⤵
                                  PID:1728
                                • C:\Windows\system32\cmd.exe
                                  cmd /c ""C:\Users\Admin\Desktop\WINBLOCK.bat" "
                                  1⤵
                                    PID:1628
                                    • C:\Windows\system32\taskkill.exe
                                      taskkill /im explorer.exe /f
                                      2⤵
                                      • Kills process with taskkill
                                      • Suspicious use of AdjustPrivilegeToken
                                      PID:1920
                                    • C:\Windows\system32\reg.exe
                                      reg add "HKCU\Software\Microsoft\Windows\CurrentVersion\Run" /v "DEexplorer.exe" /d "C:\Users\Admin\Desktop\WINBLOCK.bat" /f
                                      2⤵
                                      • Adds Run key to start application
                                      PID:2892

                                  Network

                                  MITRE ATT&CK Enterprise v15

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                                  Downloads

                                  • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\3a38a7e7-924d-44f0-b9f4-34ff921c9392.tmp
                                    Filesize

                                    233KB

                                    MD5

                                    e45a564d0363e34e1addd19bcae5ce14

                                    SHA1

                                    78677a10fe9612762b8cee3f6161604c6847e3bb

                                    SHA256

                                    d9c84fd73ec1b5af697bf16bf184047ae55137e54340db2405395e716a64c35d

                                    SHA512

                                    5411840cef618223050b1095ae5b1cb3bba4fd85ea5448d3296ad98932446ec923dca8ff8cf59779f03ba4fa36f3f658d82bbb693ef4d0afd633cc0f3863535f

                                    Download Submit

                                  • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1
                                    Filesize

                                    264KB

                                    MD5

                                    f50f89a0a91564d0b8a211f8921aa7de

                                    SHA1

                                    112403a17dd69d5b9018b8cede023cb3b54eab7d

                                    SHA256

                                    b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                                    SHA512

                                    bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

                                    Download Submit

                                  • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp
                                    Filesize

                                    16B

                                    MD5

                                    18e723571b00fb1694a3bad6c78e4054

                                    SHA1

                                    afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                                    SHA256

                                    8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                                    SHA512

                                    43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                                    Download Submit

                                  • C:\Users\Admin\Desktop\WINBLOCK.bat
                                    Filesize

                                    237B

                                    MD5

                                    47eb57f351b25eae19fd32210cfa9221

                                    SHA1

                                    ab6f95b8f61f1c605fa6b6f9b140a4ac42fadf67

                                    SHA256

                                    44f795e15d82ecbabfb75b46b637ec0cb043ed52e70c3374fd7491d9f4aec7d1

                                    SHA512

                                    b46f21f68757b2e92ccb8b825f01e680900ad7939df4c43b892c29bb946c5763c47fb78af19bbd0b6fe8a7fb7d839a0efb341a6d87fa52350d7be84c24b6f63a

                                    Download Submit

                                  • memory/2900-0-0x0000000003690000-0x0000000003691000-memory.dmp

                                    Filesize

                                    4KB

                                    Download

                                  • memory/2900-1-0x0000000003960000-0x0000000003970000-memory.dmp

                                    Filesize

                                    64KB

                                    Download

                                  • memory/2900-2-0x0000000003690000-0x0000000003691000-memory.dmp

                                    Filesize

                                    4KB

                                    Download