Analysis

  • max time kernel
    145s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-07-2024 16:58

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    9a4f3b0223e0bcb90d5a08afdae6a169

  • SHA1

    b8ea3a64121a47f7a7abc73fc9a39d912b31a724

  • SHA256

    031b3b1935b0eac9273bafb8b20484be97a1c3f9ea1bb611315042b32168f104

  • SHA512

    38ab6b70078807bc8c56f5c004ae4ef4a40690ec26bc896213a158765530caec5812b556a5555037ac986175fb1d4d588f1a982dd5e383a8c5734783507f6601

  • SSDEEP

    49152:SvHI22SsaNYfdPBldt698dBcjHJwRJ6cbR3LoGdFgTHHB72eh2NT:Svo22SsaNYfdPBldt6+dBcjHJwRJ6m

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.70:4782

Mutex

34828de8-c350-4dd4-85c9-16051c0443f7

Attributes
  • encryption_key

    2F1B645695C7578786A6BD1B6CD3966DFF24BC11

  • install_name

    sigmaexecutor.exe.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WIndows Updater

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 10 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 25 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4880
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "WIndows Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\sigmaexecutor.exe.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:744
    • C:\Windows\system32\SubDir\sigmaexecutor.exe.exe
      "C:\Windows\system32\SubDir\sigmaexecutor.exe.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2040
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "WIndows Updater" /sc ONLOGON /tr "C:\Windows\system32\SubDir\sigmaexecutor.exe.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3084
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:3568
    • 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:4124
      • 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,0x120,0x124,0xf8,0x128,0x7ffd59f246f8,0x7ffd59f24708,0x7ffd59f24718
        2⤵
          PID:3548
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2136 /prefetch:2
          2⤵
            PID:2744
          • 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=2112,9545281544529963273,8875472531800667375,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2352 /prefetch:3
            2⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:5052
          • 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=2112,9545281544529963273,8875472531800667375,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2684 /prefetch:8
            2⤵
              PID:1204
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --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=3356 /prefetch:1
              2⤵
                PID:3628
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --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=3368 /prefetch:1
                2⤵
                  PID:2864
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --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=5112 /prefetch:1
                  2⤵
                    PID:896
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --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=5016 /prefetch:1
                    2⤵
                      PID:2784
                    • 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=2112,9545281544529963273,8875472531800667375,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3472 /prefetch:8
                      2⤵
                        PID:2736
                      • 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=2112,9545281544529963273,8875472531800667375,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3472 /prefetch:8
                        2⤵
                        • Suspicious behavior: EnumeratesProcesses
                        PID:984
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --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=3468 /prefetch:1
                        2⤵
                          PID:1980
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --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=11 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3968 /prefetch:1
                          2⤵
                            PID:3872
                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=12 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5560 /prefetch:1
                            2⤵
                              PID:5300
                            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2112,9545281544529963273,8875472531800667375,131072 --disable-gpu-sandbox --use-gl=disabled --gpu-vendor-id=4318 --gpu-device-id=140 --gpu-sub-system-id=0 --gpu-revision=0 --gpu-driver-version=10.0.19041.546 --gpu-preferences=UAAAAAAAAADoAAAQAAAAAAAAAAAAAAAAAABgAAAEAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=3052 /prefetch:2
                              2⤵
                              • Suspicious behavior: EnumeratesProcesses
                              PID:5276
                          • C:\Windows\System32\CompPkgSrv.exe
                            C:\Windows\System32\CompPkgSrv.exe -Embedding
                            1⤵
                              PID:4344
                            • C:\Windows\System32\CompPkgSrv.exe
                              C:\Windows\System32\CompPkgSrv.exe -Embedding
                              1⤵
                                PID:856

                              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

                                60ead4145eb78b972baf6c6270ae6d72

                                SHA1

                                e71f4507bea5b518d9ee9fb2d523c5a11adea842

                                SHA256

                                b9e99e7387a915275e8fe4ac0b0c0cd330b4632814d5c9c446beb2755f1309a7

                                SHA512

                                8cdbafd2783048f5f54f22e13f6ef890936d5b986b0bb3fa86d2420a5bfecf7bedc56f46e6d5f126eae79f492315843c134c441084b912296e269f384a73ccde

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

                                Filesize

                                152B

                                MD5

                                1f9d180c0bcf71b48e7bc8302f85c28f

                                SHA1

                                ade94a8e51c446383dc0a45edf5aad5fa20edf3c

                                SHA256

                                a17d56c41d524453a78e3f06e0d0b0081e79d090a4b75d0b693ddbc39f6f7fdc

                                SHA512

                                282863df0e51288049587886ed37ad1cf5b6bfeed86454ea3b9f2bb7f0a1c591f3540c62712ebfcd6f1095e1977446dd5b13b904bb52b6d5c910a1efc208c785

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

                                Filesize

                                5KB

                                MD5

                                cbb9bc596d24301e75d303fa52a6f79f

                                SHA1

                                0e54cbe67755cd835f417824fc7eb6808fd8d623

                                SHA256

                                d1b7de4a4f55330f4f5e37b97e33252af98aedead03e1a724f5a2ffd7c999006

                                SHA512

                                13a78903fe09522c7faf8f36ef76540ef7f484f462de23ea46bbee5e29440eab60d6986b95232fe7a2b1a11a373b1f3c66056a437f616760631ad9430c103cc5

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

                                Filesize

                                6KB

                                MD5

                                fe230f868ace7d0ebd87f3b2bc6aca38

                                SHA1

                                ec45136ede51924415ec3a95d20b6debcebc3005

                                SHA256

                                87aa45cbb7203b6060b86b85f2d5f5765e65e8c8a479416453d9a37a06d4e6d3

                                SHA512

                                a965e82c931ae5be33d6a9a1ba348e53c6de60e44af542cf0accee0d79c42290b9636236f71ffedff6931c2203153b14325c9f5ae67d0a6d9f7054d576278d6c

                              • 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

                                11KB

                                MD5

                                dde9872d5b10478a48d557daeb30295a

                                SHA1

                                4ec096909738342c1279a7be9ab0ad029f454e0b

                                SHA256

                                d28a2a67355cead306d2595b6074a449d2a36b990caee6c1537bed4c539b1df3

                                SHA512

                                0471472e3e167bcbe50ad0d4445c721ec16b930d4840bf0a654e020fa7b6fb4a54a566f2ec5247763134580556fddc1ff443960648ea0e814c333a14e842b3b9

                              • C:\Windows\System32\SubDir\sigmaexecutor.exe.exe

                                Filesize

                                3.1MB

                                MD5

                                9a4f3b0223e0bcb90d5a08afdae6a169

                                SHA1

                                b8ea3a64121a47f7a7abc73fc9a39d912b31a724

                                SHA256

                                031b3b1935b0eac9273bafb8b20484be97a1c3f9ea1bb611315042b32168f104

                                SHA512

                                38ab6b70078807bc8c56f5c004ae4ef4a40690ec26bc896213a158765530caec5812b556a5555037ac986175fb1d4d588f1a982dd5e383a8c5734783507f6601

                              • \??\pipe\LOCAL\crashpad_4124_UVPJIFOTEELSZPVI

                                MD5

                                d41d8cd98f00b204e9800998ecf8427e

                                SHA1

                                da39a3ee5e6b4b0d3255bfef95601890afd80709

                                SHA256

                                e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                                SHA512

                                cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                              • memory/2040-9-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/2040-14-0x000000001C090000-0x000000001C5B8000-memory.dmp

                                Filesize

                                5.2MB

                              • memory/2040-13-0x000000001B9A0000-0x000000001BA52000-memory.dmp

                                Filesize

                                712KB

                              • memory/2040-12-0x000000001B170000-0x000000001B1C0000-memory.dmp

                                Filesize

                                320KB

                              • memory/2040-11-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/2040-38-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/2040-47-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/4880-10-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/4880-0-0x00007FFD60A43000-0x00007FFD60A45000-memory.dmp

                                Filesize

                                8KB

                              • memory/4880-2-0x00007FFD60A40000-0x00007FFD61501000-memory.dmp

                                Filesize

                                10.8MB

                              • memory/4880-1-0x00000000009B0000-0x0000000000CD4000-memory.dmp

                                Filesize

                                3.1MB