Analysis

  • max time kernel
    35s
  • max time network
    13s
  • platform
    windows11-21h2_x64
  • resource
    win11-20231128-en
  • resource tags

    arch:x64arch:x86image:win11-20231128-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    08/12/2023, 14:33

General

  • Target

    https://raw.githubusercontent.com/SplashGG/dl/main/strless.exe

Score
9/10

Malware Config

Signatures

  • Deletes shadow copies 2 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • VMProtect packed file 4 IoCs

    Detects executables packed with VMProtect commercial packer.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Gathers network information 2 TTPs 1 IoCs

    Uses commandline utility to view network configuration.

  • Interacts with shadow copies 2 TTPs 1 IoCs

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

  • Modifies data under HKEY_USERS 2 IoCs
  • Modifies registry class 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 12 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Volume Shadow Copy service COM API

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

Processes

  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe" --disable-background-networking --disable-component-update --simulate-outdated-no-au='Tue, 31 Dec 2099 23:59:59 GMT' --single-argument https://raw.githubusercontent.com/SplashGG/dl/main/strless.exe
    1⤵
    • Enumerates system info in registry
    • Modifies data under HKEY_USERS
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:4548
    • 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=0x100,0x104,0x108,0xdc,0x10c,0x7ffcc87d9758,0x7ffcc87d9768,0x7ffcc87d9778
      2⤵
        PID:1060
      • 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=1704 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:2
        2⤵
          PID:3524
        • 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=2072 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
          2⤵
            PID:712
          • 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=2124 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
            2⤵
              PID:1504
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2964 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:1
              2⤵
                PID:1528
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --enable-chrome-cart --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=2956 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:1
                2⤵
                  PID:1752
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.ProcessorMetrics --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=4744 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
                  2⤵
                    PID:3132
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilReadIcon --lang=en-US --service-sandbox-type=icon_reader --mojo-platform-channel-handle=5156 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
                    2⤵
                      PID:4584
                    • C:\Program Files\Google\Chrome\Application\chrome.exe
                      "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilReadIcon --lang=en-US --service-sandbox-type=icon_reader --mojo-platform-channel-handle=5308 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
                      2⤵
                        PID:6140
                      • C:\Program Files\Google\Chrome\Application\chrome.exe
                        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5112 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
                        2⤵
                          PID:2732
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5332 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
                          2⤵
                            PID:1396
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilReadIcon --lang=en-US --service-sandbox-type=icon_reader --mojo-platform-channel-handle=5316 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
                            2⤵
                              PID:4920
                            • C:\Program Files\Google\Chrome\Application\chrome.exe
                              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilReadIcon --lang=en-US --service-sandbox-type=icon_reader --mojo-platform-channel-handle=4956 --field-trial-handle=1808,i,15093434241284001485,14123266761129064371,131072 /prefetch:8
                              2⤵
                                PID:3260
                              • C:\Users\Admin\Downloads\strless.exe
                                "C:\Users\Admin\Downloads\strless.exe"
                                2⤵
                                • Executes dropped EXE
                                • Modifies registry class
                                • Suspicious use of AdjustPrivilegeToken
                                PID:5340
                                • C:\Windows\System32\cmd.exe
                                  "C:\Windows\System32\cmd.exe" /C vssadmin delete shadows /for=C: /quiet & exit
                                  3⤵
                                    PID:5644
                                    • C:\Windows\system32\vssadmin.exe
                                      vssadmin delete shadows /for=C: /quiet
                                      4⤵
                                      • Interacts with shadow copies
                                      PID:4368
                                  • C:\Windows\System32\cmd.exe
                                    "C:\Windows\System32\cmd.exe" /C ipconfig /flushdns & exit
                                    3⤵
                                      PID:3960
                                      • C:\Windows\system32\ipconfig.exe
                                        ipconfig /flushdns
                                        4⤵
                                        • Gathers network information
                                        PID:5560
                                    • C:\Windows\System32\cmd.exe
                                      "C:\Windows\System32\cmd.exe" /C FSUTIL USN DELETEJOURNAL /D C: & exit
                                      3⤵
                                        PID:872
                                        • C:\Windows\system32\fsutil.exe
                                          FSUTIL USN DELETEJOURNAL /D C:
                                          4⤵
                                            PID:5916
                                    • 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:1376
                                      • C:\Windows\system32\vssvc.exe
                                        C:\Windows\system32\vssvc.exe
                                        1⤵
                                        • Suspicious use of AdjustPrivilegeToken
                                        PID:2168

                                      Network

                                            MITRE ATT&CK Enterprise v15

                                            Replay Monitor

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                                            Downloads

                                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\TransportSecurity

                                              Filesize

                                              539B

                                              MD5

                                              165cd881ff8843d0e0d4c1e1c63f5d04

                                              SHA1

                                              ce3b7bda11a327ec62a631c9b06bbe2a13e43c8c

                                              SHA256

                                              b6322383607d66c043f875688580f88c65cb955d6af516a635eae589435d0f73

                                              SHA512

                                              1a339e99de79d795db9ac6b0ae1f1aa397016a6d3b61dd55e924f13690def1c2e69a3417d31accca6027e9761de9fb701565237369a35cc62e663cf8af2ce558

                                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Preferences

                                              Filesize

                                              6KB

                                              MD5

                                              8ee7c575ae20d83c4214f1563a140f16

                                              SHA1

                                              cf77d99acccba0eacd7fdcba36684cb179d69303

                                              SHA256

                                              6c45422858470fd5ac5b7cee1155aab93f29dd206473634fbc12bb5b459ad09b

                                              SHA512

                                              3e92e130733981e4f5fefce8a750fb2c5e06d501c297c49278995909cff0b15b78d3c0d7c8d40986ce3a9321cf09880a9cac69001bcf8b172175af1dcec3b51a

                                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Local State

                                              Filesize

                                              115KB

                                              MD5

                                              45f497f027d4f066ea3a924648ff637a

                                              SHA1

                                              221bc91117694e484620a2fbcdaaaee6ca99d241

                                              SHA256

                                              790536a0cd61027af69ca7cb9c1c9e2e60df53c42192ce4e844cc6db1d92e170

                                              SHA512

                                              2fffb1899d6a3f71bb1a4cff98532b937fcba8dcc80881c12d1a1e7d51399423bc07b3fbbde76555c2c4847487e48784a4537ceb9a99d0e5b723a66fca4b26d9

                                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\persisted_first_party_sets.json

                                              Filesize

                                              2B

                                              MD5

                                              99914b932bd37a50b983c5e7c90ae93b

                                              SHA1

                                              bf21a9e8fbc5a3846fb05b4fa0859e0917b2202f

                                              SHA256

                                              44136fa355b3678a1146ad16f7e8649e94fb4fc21fe77e8310c060f61caaff8a

                                              SHA512

                                              27c74670adb75075fad058d5ceaf7b20c4e7786c83bae8a32f626f9782af34c9a33c2046ef60fd2a7878d378e29fec851806bbd9a67878f3a9f1cda4830763fd

                                            • C:\Users\Admin\Downloads\strless.exe

                                              Filesize

                                              2.6MB

                                              MD5

                                              7fb60ff8c9849f18a1cec88180389ef4

                                              SHA1

                                              4e7633c8e3b9b23a63e89b41f47918dbc7f78059

                                              SHA256

                                              d3f0b6a5e1797be376a82e6887f414cfb448e4fcc87d9d42c2672b387f0e1f3c

                                              SHA512

                                              12237d943a687ff3af4064d2870eebe13d1cfbf70147270b39f7d400ec5a1ad069754236759273045be7f0e41e73e539076a7202605f45b45aef979af90178d1

                                            • C:\Users\Admin\Downloads\strless.exe

                                              Filesize

                                              2.6MB

                                              MD5

                                              7fb60ff8c9849f18a1cec88180389ef4

                                              SHA1

                                              4e7633c8e3b9b23a63e89b41f47918dbc7f78059

                                              SHA256

                                              d3f0b6a5e1797be376a82e6887f414cfb448e4fcc87d9d42c2672b387f0e1f3c

                                              SHA512

                                              12237d943a687ff3af4064d2870eebe13d1cfbf70147270b39f7d400ec5a1ad069754236759273045be7f0e41e73e539076a7202605f45b45aef979af90178d1

                                            • C:\Users\Admin\Downloads\strless.exe

                                              Filesize

                                              2.6MB

                                              MD5

                                              7fb60ff8c9849f18a1cec88180389ef4

                                              SHA1

                                              4e7633c8e3b9b23a63e89b41f47918dbc7f78059

                                              SHA256

                                              d3f0b6a5e1797be376a82e6887f414cfb448e4fcc87d9d42c2672b387f0e1f3c

                                              SHA512

                                              12237d943a687ff3af4064d2870eebe13d1cfbf70147270b39f7d400ec5a1ad069754236759273045be7f0e41e73e539076a7202605f45b45aef979af90178d1

                                            • memory/5340-45-0x000001B2EF9B0000-0x000001B2EFF6E000-memory.dmp

                                              Filesize

                                              5.7MB

                                            • memory/5340-46-0x00007FFCB45B0000-0x00007FFCB5072000-memory.dmp

                                              Filesize

                                              10.8MB

                                            • memory/5340-50-0x000001B2F24C0000-0x000001B2F263C000-memory.dmp

                                              Filesize

                                              1.5MB

                                            • memory/5340-51-0x000001B2F03B0000-0x000001B2F03C0000-memory.dmp

                                              Filesize

                                              64KB

                                            • memory/5340-52-0x000001B2F26B0000-0x000001B2F26C0000-memory.dmp

                                              Filesize

                                              64KB

                                            • memory/5340-48-0x000001B2F0380000-0x000001B2F0381000-memory.dmp

                                              Filesize

                                              4KB

                                            • memory/5340-47-0x00007FFCB45B0000-0x00007FFCB5072000-memory.dmp

                                              Filesize

                                              10.8MB

                                            • memory/5340-49-0x000001B2F26B0000-0x000001B2F26C0000-memory.dmp

                                              Filesize

                                              64KB

                                            • memory/5340-68-0x000001B2F26B0000-0x000001B2F26C0000-memory.dmp

                                              Filesize

                                              64KB

                                            • memory/5340-69-0x000001B2F2690000-0x000001B2F269C000-memory.dmp

                                              Filesize

                                              48KB

                                            • memory/5340-70-0x000001B2F4FA0000-0x000001B2F4FBA000-memory.dmp

                                              Filesize

                                              104KB

                                            • memory/5340-71-0x000001B2F4F80000-0x000001B2F4F88000-memory.dmp

                                              Filesize

                                              32KB

                                            • memory/5340-78-0x00007FFCB45B0000-0x00007FFCB5072000-memory.dmp

                                              Filesize

                                              10.8MB

                                            • memory/5340-80-0x00007FFCB45B0000-0x00007FFCB5072000-memory.dmp

                                              Filesize

                                              10.8MB