Analysis

  • max time kernel
    42s
  • max time network
    52s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11/01/2025, 20:53

General

  • Target

    https://github.com/quasar/Quasar/releases/download/v1.4.1/Quasar.v1.4.1.zip

Malware Config

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 7 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 60 IoCs
  • Suspicious use of SendNotifyMessage 25 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" --start-maximized --single-argument https://github.com/quasar/Quasar/releases/download/v1.4.1/Quasar.v1.4.1.zip
    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:4928
    • 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,0x100,0x104,0xd8,0x108,0x7ffc1efb46f8,0x7ffc1efb4708,0x7ffc1efb4718
      2⤵
        PID:4416
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2124,2816836827842694311,18382621188379586092,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2172 /prefetch:2
        2⤵
          PID:4756
        • 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=2124,2816836827842694311,18382621188379586092,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2224 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3524
        • 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=2124,2816836827842694311,18382621188379586092,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2844 /prefetch:8
          2⤵
            PID:4524
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2124,2816836827842694311,18382621188379586092,131072 --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=3360 /prefetch:1
            2⤵
              PID:388
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2124,2816836827842694311,18382621188379586092,131072 --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=3380 /prefetch:1
              2⤵
                PID:2676
              • 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=2124,2816836827842694311,18382621188379586092,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5328 /prefetch:8
                2⤵
                  PID:4472
                • 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=2124,2816836827842694311,18382621188379586092,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5328 /prefetch:8
                  2⤵
                  • Suspicious behavior: EnumeratesProcesses
                  PID:4588
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2124,2816836827842694311,18382621188379586092,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5616 /prefetch:1
                  2⤵
                    PID:4356
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2124,2816836827842694311,18382621188379586092,131072 --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=9 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5568 /prefetch:1
                    2⤵
                      PID:1876
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2124,2816836827842694311,18382621188379586092,131072 --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=5652 /prefetch:1
                      2⤵
                        PID:4144
                      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2124,2816836827842694311,18382621188379586092,131072 --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=5264 /prefetch:1
                        2⤵
                          PID:5108
                        • 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=2124,2816836827842694311,18382621188379586092,131072 --lang=en-US --service-sandbox-type=collections --mojo-platform-channel-handle=4752 /prefetch:8
                          2⤵
                            PID:4328
                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2124,2816836827842694311,18382621188379586092,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=14 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5736 /prefetch:1
                            2⤵
                              PID:4420
                            • 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=2124,2816836827842694311,18382621188379586092,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=6120 /prefetch:8
                              2⤵
                              • Suspicious behavior: EnumeratesProcesses
                              PID:4044
                          • C:\Windows\System32\CompPkgSrv.exe
                            C:\Windows\System32\CompPkgSrv.exe -Embedding
                            1⤵
                              PID:4584
                            • C:\Windows\System32\CompPkgSrv.exe
                              C:\Windows\System32\CompPkgSrv.exe -Embedding
                              1⤵
                                PID:432
                              • C:\Windows\System32\rundll32.exe
                                C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
                                1⤵
                                  PID:232
                                • C:\Users\Admin\Downloads\Quasar.v1.4.1\Quasar v1.4.1\Quasar.exe
                                  "C:\Users\Admin\Downloads\Quasar.v1.4.1\Quasar v1.4.1\Quasar.exe"
                                  1⤵
                                  • Suspicious use of AdjustPrivilegeToken
                                  • Suspicious use of FindShellTrayWindow
                                  • Suspicious use of SendNotifyMessage
                                  PID:3800

                                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

                                  d7cb450b1315c63b1d5d89d98ba22da5

                                  SHA1

                                  694005cd9e1a4c54e0b83d0598a8a0c089df1556

                                  SHA256

                                  38355fd694faf1223518e40bac1996bdceaf44191214b0a23c4334d5fb07d031

                                  SHA512

                                  df04d4f4b77bae447a940b28aeac345b21b299d8d26e28ecbb3c1c9e9a0e07c551e412d545c7dbb147a92c12bad7ae49ac35af021c34b88e2c6c5f7a0b65f6a8

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

                                  Filesize

                                  152B

                                  MD5

                                  37f660dd4b6ddf23bc37f5c823d1c33a

                                  SHA1

                                  1c35538aa307a3e09d15519df6ace99674ae428b

                                  SHA256

                                  4e2510a1d5a50a94fe4ce0f74932ab780758a8cbdc6d176a9ce8ab92309f26f8

                                  SHA512

                                  807b8b8dc9109b6f78fc63655450bf12b9a006ff63e8f29ade8899d45fdf4a6c068c5c46a3efbc4232b9e1e35d6494f00ded5cdb3e235c8a25023bfbd823992d

                                • 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

                                  5KB

                                  MD5

                                  f8df6b47093306c146df833734fa3b78

                                  SHA1

                                  240dccdf9b66cf1abe2b57f2c484059db17bf9ec

                                  SHA256

                                  57510ce938fff1fcf1abc14d9ec04a400edcac377c8b873dd14e6668a48b9000

                                  SHA512

                                  53e570fa4ff2f126875f8cc814a74b5472065fb2ae7374032cac086f8f43f66e4d1d07a3f0c6622894825b2066d4db6c06e71b4f03f01e0b7fdf8be6884c93bd

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

                                  Filesize

                                  6KB

                                  MD5

                                  c87e61ac345b54a41d527fd86cdefec4

                                  SHA1

                                  f47fb318df2d288e42d1a4adf531803e5ccd6b29

                                  SHA256

                                  fde458c38290805815bdfab481df0f269dd9b9743b4db1c6fc79046c28966736

                                  SHA512

                                  d0efa0ff58842346261b3a31abf5ae002f3acd32672774f205f53e4b90a020f261c5f3105bd109b981a467b0c47a34802812e60215a9e663c0cfb8d2887e2db4

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

                                  Filesize

                                  6KB

                                  MD5

                                  e97f7eb7af8d07f5ff74ac9534ce9a44

                                  SHA1

                                  3e6dd871ddd0cdcad0dd0167697b8186b8c3ca85

                                  SHA256

                                  5a4e893a4b332cb440640698a51845d0da9aed6aee165f53ecfea3279447d165

                                  SHA512

                                  4082056b2ce98925904bd76d5fff6490c4de695803d6423877c6d535fcc4af147c74a669e66189d3335cb59b095b2712b4fc5401faad4d0d04242f85676e0ac8

                                • 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

                                  10KB

                                  MD5

                                  a158f4502b2e923c8941771df04f8cae

                                  SHA1

                                  a7d5fc26d6ee13a2cccfaa6f3d9ca401e9e9fd97

                                  SHA256

                                  ef72abfa7c76e74dfa302268b3c60921451d50fc5df7fc3fe1443f84fd411bb9

                                  SHA512

                                  7d700f592b56294b1f60e27fba973e33c09406567bec1e159651f9f23cede28ce87ff0615d71af9b0ec9d11502f28f5cd968d0ecb19bafda5b962febdf3bde2b

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

                                  Filesize

                                  10KB

                                  MD5

                                  768aa28681794bcdffb68da7e342fcf1

                                  SHA1

                                  446bb3d7904ecfd5fb331430d288c95c8385df0d

                                  SHA256

                                  21d90f3e7ac07fed51fe9d510aead03a5e1e2a3f2c1f7cd7817b5ad05de947a1

                                  SHA512

                                  4714b339b3d618769f920ddd59c775172fbeb86c82929c50890c4da44f6f9354758237c7070bb6809274fd2bfed62c1a7a442859f40b90ed07ef5cc79cfab24f

                                • C:\Users\Admin\Downloads\Unconfirmed 184245.crdownload

                                  Filesize

                                  3.3MB

                                  MD5

                                  13aa4bf4f5ed1ac503c69470b1ede5c1

                                  SHA1

                                  c0b7dadff8ac37f6d9fd00ae7f375e12812bfc00

                                  SHA256

                                  4cdeb2eae1cec1ab07077142313c524e9cf360cdec63497538c4405c2d8ded62

                                  SHA512

                                  767b03e4e0c2a97cb0282b523bcad734f0c6d226cd1e856f6861e6ae83401d0d30946ad219c8c5de3c90028a0141d3dc0111c85e0a0952156cf09e189709fa7d

                                • memory/3800-101-0x00000274875A0000-0x00000274876D8000-memory.dmp

                                  Filesize

                                  1.2MB

                                • memory/3800-102-0x0000027487AC0000-0x0000027487AD6000-memory.dmp

                                  Filesize

                                  88KB

                                • memory/3800-105-0x00000274A4E40000-0x00000274A516E000-memory.dmp

                                  Filesize

                                  3.2MB