Analysis

  • max time kernel
    91s
  • max time network
    100s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/03/2024, 13:53

General

  • Target

    https://samples.vx-underground.org/Samples/Families/SysJoker/Samples/Win/1ffd6559d21470c40dcf9236da51e5823d7ad58c93502279871c3fe7718c901c.7z

Malware Config

Signatures

  • Detection for the Linux version of Sysjoker cross-platform backdoor 1 IoCs
  • Detection for the macOS version of Sysjoker cross-platform backdoor 1 IoCs
  • Detection for the windows version of Sysjoker cross-platform backdoor 1 IoCs
  • SysJoker

    SysJoker is a cross-platform backdoor first seen in late 2021.

  • Executes dropped EXE 1 IoCs
  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 36 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://samples.vx-underground.org/Samples/Families/SysJoker/Samples/Win/1ffd6559d21470c40dcf9236da51e5823d7ad58c93502279871c3fe7718c901c.7z
    1⤵
    • Enumerates system info in registry
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:2056
    • 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=0xfc,0x100,0x104,0xd8,0x108,0x7fff172046f8,0x7fff17204708,0x7fff17204718
      2⤵
        PID:3280
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2152 /prefetch:2
        2⤵
          PID:4416
        • 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=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2204 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3504
        • 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=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2880 /prefetch:8
          2⤵
            PID:4852
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --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:2808
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3544 /prefetch:1
              2⤵
                PID:2336
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --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=5196 /prefetch:1
                2⤵
                  PID:4132
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --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=5244 /prefetch:1
                  2⤵
                    PID:3800
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4988 /prefetch:1
                    2⤵
                      PID:4432
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --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=10 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4312 /prefetch:1
                      2⤵
                        PID:2672
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=edge_collections.mojom.CollectionsDataManager --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --service-sandbox-type=collections --mojo-platform-channel-handle=5952 /prefetch:8
                        2⤵
                          PID:3692
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=13 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3552 /prefetch:1
                          2⤵
                            PID:2860
                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=quarantine.mojom.Quarantine --field-trial-handle=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5228 /prefetch:8
                            2⤵
                            • Suspicious behavior: EnumeratesProcesses
                            PID:3520
                          • 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=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=6260 /prefetch:8
                            2⤵
                              PID:4544
                            • 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=2132,2380492018411359819,4865462867463152891,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=6260 /prefetch:8
                              2⤵
                              • Suspicious behavior: EnumeratesProcesses
                              PID:3484
                            • C:\Program Files\7-Zip\7zFM.exe
                              "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\Downloads\1ffd6559d21470c40dcf9236da51e5823d7ad58c93502279871c3fe7718c901c.7z"
                              2⤵
                              • Suspicious behavior: GetForegroundWindowSpam
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of FindShellTrayWindow
                              PID:2532
                          • C:\Windows\System32\CompPkgSrv.exe
                            C:\Windows\System32\CompPkgSrv.exe -Embedding
                            1⤵
                              PID:2428
                            • C:\Windows\System32\CompPkgSrv.exe
                              C:\Windows\System32\CompPkgSrv.exe -Embedding
                              1⤵
                                PID:1964
                              • C:\Users\Admin\Desktop\1ffd6559d21470c40dcf9236da51e5823d7ad58c93502279871c3fe7718c901c.exe
                                "C:\Users\Admin\Desktop\1ffd6559d21470c40dcf9236da51e5823d7ad58c93502279871c3fe7718c901c.exe"
                                1⤵
                                • Executes dropped EXE
                                PID:2864

                              Network

                              MITRE ATT&CK Enterprise v15

                              Replay Monitor

                              Loading Replay Monitor...

                              Downloads

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

                                Filesize

                                152B

                                MD5

                                e494d16e4b331d7fc483b3ae3b2e0973

                                SHA1

                                d13ca61b6404902b716f7b02f0070dec7f36edbf

                                SHA256

                                a43f82254638f7e05d1fea29e83545642f163a7a852f567fb2e94f0634347165

                                SHA512

                                016b0ed886b33d010c84ca080d74fa343da110db696655c94b71a4cb8eb8284748dd83e06d0891a6e1e859832b0f1d07748b11d4d1a4576bbe1bee359e218737

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

                                Filesize

                                152B

                                MD5

                                0764f5481d3c05f5d391a36463484b49

                                SHA1

                                2c96194f04e768ac9d7134bc242808e4d8aeb149

                                SHA256

                                cc773d1928f4a87e10944d153c23a7b20222b6795c9a0a09b81a94c1bd026ac3

                                SHA512

                                a39e4cb7064fdd7393ffe7bb3a5e672b1bdc14d878cac1c5c9ceb97787454c5a4e7f9ae0020c6d524920caf7eadc9d49e10bee8799d73ee4e8febe7e51e22224

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

                                Filesize

                                194B

                                MD5

                                04e88baca4bf411fcc225566723bb596

                                SHA1

                                f802b21848cfd3dcff9f06eec06f0da327cbf3a2

                                SHA256

                                b1e3b713a80e1b6fdc450c64819d1f17098a954fe6e3bf5c36200663bc847262

                                SHA512

                                03618b2b51a4855a7838370b9f5cf3bfd065697a8dbb259603b315c4cb8e13ba65c7bf6d6348e23db758516109f0e942cb6b3d534960ab7372ee881d86d7ae47

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

                                Filesize

                                111B

                                MD5

                                807419ca9a4734feaf8d8563a003b048

                                SHA1

                                a723c7d60a65886ffa068711f1e900ccc85922a6

                                SHA256

                                aa10bf07b0d265bed28f2a475f3564d8ddb5e4d4ffee0ab6f3a0cc564907b631

                                SHA512

                                f10d496ae75db5ba412bd9f17bf0c7da7632db92a3fabf7f24071e40f5759c6a875ad8f3a72bad149da58b3da3b816077df125d0d9f3544adba68c66353d206c

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

                                Filesize

                                6KB

                                MD5

                                daaafda2a90ecd7cba0d37a4eae17028

                                SHA1

                                584c4fd466de1fd8e77478f716bd17f9685907b6

                                SHA256

                                203f96ed24fe05a6281843dcfd3440b94e5c48ed6b4d9d9193a807a9ea152235

                                SHA512

                                e694c93927dfbe8627e4d59c12e8f2a5ea3a997deecb6d11c85ca7dda37e45edbc30e24d899e675f7ae1d9f96e03b20c76ce9c02f0026597397f2bdb00b03889

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

                                Filesize

                                6KB

                                MD5

                                8321c4b19de02ed4763399156a48ff10

                                SHA1

                                14f6b3b1816ac8d429f79a1e377f7b63f53fe7d8

                                SHA256

                                4f0519897be32e0b0bb4132748eb5e182c265adea5b5693f607cedadf2b0bc8b

                                SHA512

                                3c6ee33cb34803089d1ce8f9fe6e7961f9b0c8750c66d782bc57bea950d9597f1cea21392859299ff7150b286c41df10c6106e10795e1740e173a5d781eabed8

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

                                Filesize

                                6KB

                                MD5

                                c351c6d31a403fe1ff4b4d8e54f6553d

                                SHA1

                                d06e64381b12ced966922fa29154c8c856e85dd0

                                SHA256

                                0ec259590d7d0c21b6e482753d71bcac87ee61793c2c2a964ec2011cb66a6ffd

                                SHA512

                                e5351a5e36053e213edcabc6af12131c4e9838b636306f2eff0662ced8f2033470f8fadad6d6f70b806176724173f00c44c8bae907bc414e6360388d7c32ae8e

                              • 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

                                12KB

                                MD5

                                b353869d5f31294256511e40528c7d19

                                SHA1

                                c5a6ace370d998e0f0059ce398437d49915f20d7

                                SHA256

                                48c27e54b77a1890ce176fd33d95aa003983324b74962dffa7a18302e9cc64a9

                                SHA512

                                4cda5d46c214e22f7ea98b1acd14d87cb446e0eceb761415d1787f6485e1f8b70c06e0c518d40b3f38ce3711d2552f5c7bd7dea84086d104f82bd27a82af5535

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

                                Filesize

                                9KB

                                MD5

                                650a36493219fb5b9976b4532eff02ac

                                SHA1

                                2908490df704ee6930ee39150f185cce48860642

                                SHA256

                                e4d5c50a356484b90d527487eb99e912b6e6e5dfe029983f861d87521e4d1fc2

                                SHA512

                                3eaa92efae7f68ea5b2e2ad9a0766497ed85fbbfeab91d509964018a05c42e46db830f8f7fce9bba422c2dbc21c392c48a5475c7aa52dae5086c21b6eaab713d

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

                                Filesize

                                12KB

                                MD5

                                9f47189ae8da6185d53561958f11e39c

                                SHA1

                                50f51ea69f0702dda68a1df97f6f10da643c264b

                                SHA256

                                f21ae95b89b5e990767e7109b82b47ce0cdf56b8f1b97f8ed799cc50d0fb5be0

                                SHA512

                                9d99ccd619463bbbbdec589bbbf36b91eb1ec9d1f1c9047a614e03dfabb979fd718eb825d488ddcab0ed6ad8b5cb0aa43512268e0b49f1877602bc789bc03654

                              • C:\Users\Admin\Desktop\1ffd6559d21470c40dcf9236da51e5823d7ad58c93502279871c3fe7718c901c.exe

                                Filesize

                                392KB

                                MD5

                                d90d0f4d6dad402b5d025987030cc87c

                                SHA1

                                fad66bdf5c5dc2c050cbc574832c6995dba086a0

                                SHA256

                                1ffd6559d21470c40dcf9236da51e5823d7ad58c93502279871c3fe7718c901c

                                SHA512

                                c2faeacfd588585633630ad710f443a72c7617c2d5e37dbfe43570e6ac5904e4b81eb682356a48a93bb794ef5e9d8ad0d673966d57798079b4de62ea61241024

                              • C:\Users\Admin\Downloads\1ffd6559d21470c40dcf9236da51e5823d7ad58c93502279871c3fe7718c901c.7z

                                Filesize

                                166KB

                                MD5

                                27c2698c61b3c616cc36e463278a265f

                                SHA1

                                6d812e6f020e2273c95497614736745784de21fb

                                SHA256

                                57509f01fab5e03193d94a61f8c2523409dd261ab21d2d769839fd375d21c92b

                                SHA512

                                844d8da5ee729fb54ac5ba7541c238f040b651b4686299c6d7df4cfaf4c371e1101fd62290b10f3a74a9e491bb6b952ce3b31ae1329a9d3de6aceb9874647a80