Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    10/04/2024, 12:20

General

  • Target
    https://www.mediafire.com/file/5ah20c6gpr8zpt5/Granny.rar/file
  • Sample240410-ph8kdaae81

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • 192.168.0.115:4782

Mutex
  • d4f1b642-ba7a-40a5-869d-d572284e9b2b

Attributes
  • encryption_key

    8B6B5DF09D5D290A4A395D941B0F5CEA30B93E88

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    SteamSettings

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 14 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 40 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:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --single-argument https://www.mediafire.com/file/5ah20c6gpr8zpt5/Granny.rar/file
    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:3284
    • 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,0x100,0x104,0xd8,0x108,0x7ff8831b46f8,0x7ff8831b4708,0x7ff8831b4718
      2⤵
        PID:4888
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2020 /prefetch:2
        2⤵
          PID:1780
        • 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=1992,408478948384970639,10982854029772384035,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2432 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:1340
        • 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=1992,408478948384970639,10982854029772384035,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2796 /prefetch:8
          2⤵
            PID:3592
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=3256 /prefetch:1
            2⤵
              PID:1656
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=3344 /prefetch:1
              2⤵
                PID:4592
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=5244 /prefetch:1
                2⤵
                  PID:624
                • 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=1992,408478948384970639,10982854029772384035,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5480 /prefetch:8
                  2⤵
                    PID:2968
                  • 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=1992,408478948384970639,10982854029772384035,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=5480 /prefetch:8
                    2⤵
                    • Suspicious behavior: EnumeratesProcesses
                    PID:5016
                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=5532 /prefetch:1
                    2⤵
                      PID:5028
                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=6004 /prefetch:1
                      2⤵
                        PID:1320
                      • 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=1992,408478948384970639,10982854029772384035,131072 --lang=en-US --service-sandbox-type=collections --mojo-platform-channel-handle=5276 /prefetch:8
                        2⤵
                          PID:4608
                        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=6020 /prefetch:1
                          2⤵
                            PID:3428
                          • 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=1992,408478948384970639,10982854029772384035,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=6568 /prefetch:8
                            2⤵
                            • Suspicious behavior: EnumeratesProcesses
                            PID:3180
                          • C:\Program Files\7-Zip\7zFM.exe
                            "C:\Program Files\7-Zip\7zFM.exe" "C:\Users\Admin\Downloads\Granny.rar"
                            2⤵
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of FindShellTrayWindow
                            PID:884
                            • C:\Users\Admin\AppData\Local\Temp\7zO4734B537\Granny.exe
                              "C:\Users\Admin\AppData\Local\Temp\7zO4734B537\Granny.exe"
                              3⤵
                              • Executes dropped EXE
                              • Suspicious use of AdjustPrivilegeToken
                              PID:760
                              • C:\Windows\SYSTEM32\schtasks.exe
                                "schtasks" /create /tn "SteamSettings" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                4⤵
                                • Creates scheduled task(s)
                                PID:4384
                              • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                4⤵
                                • Executes dropped EXE
                                • Suspicious use of AdjustPrivilegeToken
                                • Suspicious use of SetWindowsHookEx
                                PID:5168
                                • C:\Windows\SYSTEM32\schtasks.exe
                                  "schtasks" /create /tn "SteamSettings" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                  5⤵
                                  • Creates scheduled task(s)
                                  PID:5384
                          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=15 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5736 /prefetch:1
                            2⤵
                              PID:5220
                            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=16 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6620 /prefetch:1
                              2⤵
                                PID:5228
                              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=17 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5048 /prefetch:1
                                2⤵
                                  PID:5476
                                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=18 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=6720 /prefetch:1
                                  2⤵
                                    PID:5484
                                  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=1992,408478948384970639,10982854029772384035,131072 --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=5156 /prefetch:2
                                    2⤵
                                    • Suspicious behavior: EnumeratesProcesses
                                    PID:5184
                                • C:\Windows\System32\CompPkgSrv.exe
                                  C:\Windows\System32\CompPkgSrv.exe -Embedding
                                  1⤵
                                    PID:5108
                                  • C:\Windows\System32\CompPkgSrv.exe
                                    C:\Windows\System32\CompPkgSrv.exe -Embedding
                                    1⤵
                                      PID:4776

                                    Network

                                          MITRE ATT&CK Enterprise v15

                                          Replay Monitor

                                          Loading Replay Monitor...

                                          Downloads

                                          settings.dat

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat
                                          • Size 152B
                                          • SHA256 05e80abd624454e5b860a08f40ddf33d672c3fed319aac180b7de5754bc07b71
                                          • MD5 SHA1 SHA512

                                          settings.dat

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat
                                          • Size 152B
                                          • SHA256 1b53367e0041d54af89e7dd59733231f5da1393c551ed2b943c89166c0baca40
                                          • MD5 SHA1 SHA512

                                          the-real-index

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Code Cache\js\index-dir\the-real-index
                                          • Size 360B
                                          • SHA256 ee457a06fa7597e47d954fd68bd085d370e8e92741af22beb61ab531766956ff
                                          • MD5 SHA1 SHA512

                                          Network Persistent State

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Network Persistent State
                                          • Size 2KB
                                          • SHA256 394d3807212040a31b9d35f965fd4597692c616cb2b20d8917d3e65814cd66d4
                                          • MD5 SHA1 SHA512

                                          Preferences

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                                          • Size 6KB
                                          • SHA256 efa51d53d7b6b7f7fc1ea70030ebf4ce3be56eecdfdc3fa3ec7cb13b6df8b0b7
                                          • MD5 SHA1 SHA512 SSDEEP

                                          Preferences

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                                          • Size 8KB
                                          • SHA256 395afa52f6b7c8fe1fae47d611ab2b9ed5de5e8ac6e89e9e18fcae4213593544
                                          • MD5 SHA1 SHA512 SSDEEP

                                          CURRENT

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\data_reduction_proxy_leveldb\CURRENT
                                          • Size 16B
                                          • SHA256 0861415cada612ea5834d56e2cf1055d3e63979b69eb71d32ae9ae394d8306cd
                                          • MD5 SHA1 SHA512

                                          Local State

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State
                                          • Size 11KB
                                          • SHA256 53f97bcd3377e46fc4377987233ff973628c58473ff06b6971ed8450a33ea3df
                                          • MD5 SHA1 SHA512 SSDEEP

                                          Local State

                                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State
                                          • Size 11KB
                                          • SHA256 4801a14be6f8943bb8c08576eab4a99aebe6f25a19e4b9fdcb6361633984262a
                                          • MD5 SHA1 SHA512 SSDEEP

                                          Granny.exe

                                          • Path C:\Users\Admin\AppData\Local\Temp\7zO4734B537\Granny.exe
                                          • Size 3.2MB
                                          • SHA256 8c894d73c750dc2a43d427a060c327a2b31174ebd33bc4e8884bbd097fa0a0d6
                                          • MD5 SHA1 SHA512 SSDEEP

                                          Granny.rar

                                          • Path C:\Users\Admin\Downloads\Granny.rar
                                          • Size 1.1MB
                                          • SHA256 91d84bce4cd4bbf71eb473b028ff72c9f279008f4af5133919f15e1758cb5fa6
                                          • MD5 SHA1 SHA512 SSDEEP

                                          memory/760-117-0x00007FF870AF0000-0x00007FF8715B1000-memory.dmp

                                          memory/760-126-0x00007FF870AF0000-0x00007FF8715B1000-memory.dmp

                                          memory/760-119-0x000000001BF30000-0x000000001BF40000-memory.dmp

                                          memory/760-118-0x0000000000F10000-0x000000000124E000-memory.dmp

                                          memory/5168-127-0x00007FF870AF0000-0x00007FF8715B1000-memory.dmp

                                          memory/5168-128-0x000000001B270000-0x000000001B280000-memory.dmp

                                          memory/5168-131-0x000000001B9C0000-0x000000001BA10000-memory.dmp

                                          memory/5168-132-0x000000001BAD0000-0x000000001BB82000-memory.dmp

                                          memory/5168-137-0x000000001C1C0000-0x000000001C6E8000-memory.dmp

                                          memory/5168-162-0x00007FF870AF0000-0x00007FF8715B1000-memory.dmp