Analysis

  • max time kernel
    83s
  • max time network
    84s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-11-2024 01:06

General

  • Target

    nosdf.exe

  • Size

    3.1MB

  • MD5

    7cb529ccbaa809d55990665240746474

  • SHA1

    11e246f11667ea7801be4a89a04564c36a476545

  • SHA256

    c1cf928e92c187547cefa3c10957e959ba188e5dd2309030cda923f9909dc7da

  • SHA512

    275d5f82edb97e0257108c41882222d298a45a9b3e4d211d64f0d311ca7ccced931c7ccf2b863b50fce20ff4ddbb0c8ac91c70680f86c34e62222dae6a6d718c

  • SSDEEP

    49152:rvyI22SsaNYfdPBldt698dBcjHSUSu1J/6oGdrTHHB72eh2NT:rvf22SsaNYfdPBldt6+dBcjHSUS/

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

147.185.221.23:56150

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes
  • encryption_key

    AEA258EF65BF1786F0F767C0BE2497ECC304C46F

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies data under HKEY_USERS 2 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 2 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 24 IoCs
  • Suspicious use of FindShellTrayWindow 26 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\nosdf.exe
    "C:\Users\Admin\AppData\Local\Temp\nosdf.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3036
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4872
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2288
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4044
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.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:4380
    • 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:4 --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=123.0.6312.123 --initial-client-data=0x118,0x11c,0x120,0xf4,0x124,0x7ffff976cc40,0x7ffff976cc4c,0x7ffff976cc58
      2⤵
        PID:4580
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --no-appcompat-clear --gpu-preferences=WAAAAAAAAADgAAAMAAAAAAAAAAAAAAAAAABgAAEAAAA4AAAAAAAAAAAAAAAEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAGAAAAAAAAAAYAAAAAAAAAAgAAAAAAAAACAAAAAAAAAAIAAAAAAAAAA== --field-trial-handle=2080,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=2076 /prefetch:2
        2⤵
          PID:3244
        • 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 --no-appcompat-clear --field-trial-handle=1968,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=2260 /prefetch:3
          2⤵
            PID:3328
          • 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=service --no-appcompat-clear --field-trial-handle=2280,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=2284 /prefetch:8
            2⤵
              PID:4928
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --field-trial-handle=3148,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=3160 /prefetch:1
              2⤵
                PID:212
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --field-trial-handle=3316,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=3336 /prefetch:1
                2⤵
                  PID:4504
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --field-trial-handle=3720,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4568 /prefetch:1
                  2⤵
                    PID:232
                  • 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 --no-appcompat-clear --field-trial-handle=4804,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4812 /prefetch:8
                    2⤵
                      PID:3784
                    • 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 --no-appcompat-clear --field-trial-handle=4764,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4952 /prefetch:8
                      2⤵
                        PID:388
                      • 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 --no-appcompat-clear --field-trial-handle=4760,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4872 /prefetch:8
                        2⤵
                          PID:3324
                        • 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 --no-appcompat-clear --field-trial-handle=4724,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=3712 /prefetch:8
                          2⤵
                            PID:432
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=4556,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=5216 /prefetch:8
                            2⤵
                              PID:3908
                            • 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 --no-appcompat-clear --field-trial-handle=5332,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=5324 /prefetch:8
                              2⤵
                                PID:3520
                              • C:\Program Files\Google\Chrome\Application\chrome.exe
                                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=unzip.mojom.Unzipper --lang=en-US --service-sandbox-type=service --no-appcompat-clear --field-trial-handle=5336,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4548 /prefetch:8
                                2⤵
                                  PID:4108
                                • 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 --no-appcompat-clear --field-trial-handle=4896,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4784 /prefetch:8
                                  2⤵
                                    PID:3972
                                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --extension-process --no-appcompat-clear --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=16 --field-trial-handle=5444,i,4751288369461746009,5554623770488120551,262144 --variations-seed-version=20241006-180150.222000 --mojo-platform-channel-handle=4544 /prefetch:2
                                    2⤵
                                      PID:4140
                                  • C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe
                                    "C:\Program Files\Google\Chrome\Application\123.0.6312.123\elevation_service.exe"
                                    1⤵
                                      PID:1016
                                    • C:\Windows\system32\svchost.exe
                                      C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s NgcSvc
                                      1⤵
                                        PID:3300

                                      Network

                                      MITRE ATT&CK Enterprise v15

                                      Replay Monitor

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                                      Downloads

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

                                        Filesize

                                        649B

                                        MD5

                                        d9b9fd31a395a222c5a5be1eb771239a

                                        SHA1

                                        956aaeaecd87e5a1e28ea996de0771ebd6e50a28

                                        SHA256

                                        c4b642419453ef855f55d7e774dfedda77ab702b14b3bda484f85fd03f628e38

                                        SHA512

                                        491c42ed44785a28185e3704cdc26af719035c3c7966d5d019dea090dd1700324f9c401abebcba0a0e7894120171cf30b226c48b93569cf09532c2cea809f3f4

                                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Extensions\ghbmnnjooekpmoecnnnilnnbdlolhkhi\1.83.1_0\_locales\en_CA\messages.json

                                        Filesize

                                        851B

                                        MD5

                                        07ffbe5f24ca348723ff8c6c488abfb8

                                        SHA1

                                        6dc2851e39b2ee38f88cf5c35a90171dbea5b690

                                        SHA256

                                        6895648577286002f1dc9c3366f558484eb7020d52bbf64a296406e61d09599c

                                        SHA512

                                        7ed2c8db851a84f614d5daf1d5fe633bd70301fd7ff8a6723430f05f642ceb3b1ad0a40de65b224661c782ffcec69d996ebe3e5bb6b2f478181e9a07d8cd41f6

                                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Extensions\ghbmnnjooekpmoecnnnilnnbdlolhkhi\1.83.1_0\dasherSettingSchema.json

                                        Filesize

                                        854B

                                        MD5

                                        4ec1df2da46182103d2ffc3b92d20ca5

                                        SHA1

                                        fb9d1ba3710cf31a87165317c6edc110e98994ce

                                        SHA256

                                        6c69ce0fe6fab14f1990a320d704fee362c175c00eb6c9224aa6f41108918ca6

                                        SHA512

                                        939d81e6a82b10ff73a35c931052d8d53d42d915e526665079eeb4820df4d70f1c6aebab70b59519a0014a48514833fefd687d5a3ed1b06482223a168292105d

                                      • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Network\536e700a-edb0-44f4-8429-9a298dbc9011.tmp

                                        Filesize

                                        2B

                                        MD5

                                        d751713988987e9331980363e24189ce

                                        SHA1

                                        97d170e1550eee4afc0af065b78cda302a97674c

                                        SHA256

                                        4f53cda18c2baa0c0354bb5f9a3ecbe5ed12ab4d8e11ba873c2f11161202b945

                                        SHA512

                                        b25b294cb4deb69ea00a4c3cf3113904801b6015e5956bd019a8570b1fe1d6040e944ef3cdee16d0a46503ca6e659a25f21cf9ceddc13f352a3c98138c15d6af

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

                                        Filesize

                                        9KB

                                        MD5

                                        69aca83a1f77ba59f1896689e08bb16d

                                        SHA1

                                        742cac8c3d3dfcec28338fd2c665a38328d7273e

                                        SHA256

                                        ab3181800be9f8f600ce14c568fbdd191d037be9410ce717d18f1371e113bcd5

                                        SHA512

                                        947b66020b1ece068ab1e9f7682f19e8cce16000feb282148578ad7e9a7c92717b82b3611f45c26f1617970c7b8c1ea10418786f53d2010da09bbdbc7e35c8ae

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

                                        Filesize

                                        232KB

                                        MD5

                                        fa174b7d581f8b5643c9c91adcba1a50

                                        SHA1

                                        55598be54dd8d674f1485c4fb5b47ff0691a2b6b

                                        SHA256

                                        238f99be64bbe9bfde551e3645205946d8db535332877960ed6d5f4616abe9ba

                                        SHA512

                                        f6e6705e11401777152f0bca13997dd6b46dbf22672ae74f164119a62a8ca56b36b7d0344954ec9a3f2459c7536817532e6ad2f2ad6b665b274ba0b0f33fb44f

                                      • C:\Users\Admin\AppData\Local\Temp\scoped_dir4380_1790244516\213a9d85-faf3-448e-8df2-9eaa69c02329.tmp

                                        Filesize

                                        132KB

                                        MD5

                                        da75bb05d10acc967eecaac040d3d733

                                        SHA1

                                        95c08e067df713af8992db113f7e9aec84f17181

                                        SHA256

                                        33ae9b8f06dc777bb1a65a6ba6c3f2a01b25cd1afc291426b46d1df27ea6e7e2

                                        SHA512

                                        56533de53872f023809a20d1ea8532cdc2260d40b05c5a7012c8e61576ff092f006a197f759c92c6b8c429eeec4bb542073b491ddcfd5b22cd4ecbe1a8a7c6ef

                                      • C:\Users\Admin\AppData\Local\Temp\scoped_dir4380_1790244516\CRX_INSTALL\_locales\en_CA\messages.json

                                        Filesize

                                        711B

                                        MD5

                                        558659936250e03cc14b60ebf648aa09

                                        SHA1

                                        32f1ce0361bbfdff11e2ffd53d3ae88a8b81a825

                                        SHA256

                                        2445cad863be47bb1c15b57a4960b7b0d01864e63cdfde6395f3b2689dc1444b

                                        SHA512

                                        1632f5a3cd71887774bf3cb8a4d8b787ea6278271657b0f1d113dbe1a7fd42c4daa717cc449f157ce8972037572b882dc946a7dc2c0e549d71982dcdee89f727

                                      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

                                        Filesize

                                        3.1MB

                                        MD5

                                        7cb529ccbaa809d55990665240746474

                                        SHA1

                                        11e246f11667ea7801be4a89a04564c36a476545

                                        SHA256

                                        c1cf928e92c187547cefa3c10957e959ba188e5dd2309030cda923f9909dc7da

                                        SHA512

                                        275d5f82edb97e0257108c41882222d298a45a9b3e4d211d64f0d311ca7ccced931c7ccf2b863b50fce20ff4ddbb0c8ac91c70680f86c34e62222dae6a6d718c

                                      • memory/2288-10-0x00007FFFFE6F0000-0x00007FFFFF1B1000-memory.dmp

                                        Filesize

                                        10.8MB

                                      • memory/2288-18-0x00007FFFFE6F0000-0x00007FFFFF1B1000-memory.dmp

                                        Filesize

                                        10.8MB

                                      • memory/2288-19-0x00007FFFFE6F0000-0x00007FFFFF1B1000-memory.dmp

                                        Filesize

                                        10.8MB

                                      • memory/2288-17-0x000000001BE50000-0x000000001BE8C000-memory.dmp

                                        Filesize

                                        240KB

                                      • memory/2288-16-0x000000001BDF0000-0x000000001BE02000-memory.dmp

                                        Filesize

                                        72KB

                                      • memory/2288-13-0x000000001BE90000-0x000000001BF42000-memory.dmp

                                        Filesize

                                        712KB

                                      • memory/2288-12-0x000000001BD80000-0x000000001BDD0000-memory.dmp

                                        Filesize

                                        320KB

                                      • memory/2288-11-0x00007FFFFE6F0000-0x00007FFFFF1B1000-memory.dmp

                                        Filesize

                                        10.8MB

                                      • memory/3036-0-0x00007FFFFE6F3000-0x00007FFFFE6F5000-memory.dmp

                                        Filesize

                                        8KB

                                      • memory/3036-9-0x00007FFFFE6F0000-0x00007FFFFF1B1000-memory.dmp

                                        Filesize

                                        10.8MB

                                      • memory/3036-2-0x00007FFFFE6F0000-0x00007FFFFF1B1000-memory.dmp

                                        Filesize

                                        10.8MB

                                      • memory/3036-1-0x0000000000810000-0x0000000000B34000-memory.dmp

                                        Filesize

                                        3.1MB