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Analysis

  • max time kernel
    24s
  • max time network
    35s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    16-01-2025 09:47

General

  • Target

    4363463463464363463463463.exe

  • Size

    10KB

  • MD5

    2a94f3960c58c6e70826495f76d00b85

  • SHA1

    e2a1a5641295f5ebf01a37ac1c170ac0814bb71a

  • SHA256

    2fcad226b17131da4274e1b9f8f31359bdd325c9568665f08fd1f6c5d06a23ce

  • SHA512

    fbf55b55fcfb12eb8c029562956229208b9e8e2591859d6336c28a590c92a4d0f7033a77c46ef6ebe07ddfca353aba1e84b51907cd774beab148ee901c92d62f

  • SSDEEP

    192:xlwayyHOXGc20L7BIW12n/ePSjiTlzkGu8stYcFwVc03KY:xlwwHe/20PKn/cLTlHuptYcFwVc03K

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.43.241:4782

Mutex

0517af80-95f0-4a6d-a904-5b7ee8faa157

Attributes
  • encryption_key

    6095BF6D5D58D02597F98370DFD1CCEB782F1EDD

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svhost

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 2 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Enumerates system info in registry 2 TTPs 4 IoCs
  • Modifies system certificate store 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: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of SetWindowsHookEx 4 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\4363463463464363463463463.exe
    "C:\Users\Admin\AppData\Local\Temp\4363463463464363463463463.exe"
    1⤵
    • Loads dropped DLL
    • System Location Discovery: System Language Discovery
    • Modifies system certificate store
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1980
    • C:\Users\Admin\AppData\Local\Temp\Files\discord.exe
      "C:\Users\Admin\AppData\Local\Temp\Files\discord.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2748
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1088
      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1308
        • C:\Windows\system32\schtasks.exe
          "schtasks" /create /tn "svhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
          4⤵
          • Scheduled Task/Job: Scheduled Task
          PID:2516
  • C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\EXCEL.EXE" /dde
    1⤵
    • System Location Discovery: System Language Discovery
    • Enumerates system info in registry
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    PID:2812
  • C:\Program Files\Google\Chrome\Application\chrome.exe
    "C:\Program Files\Google\Chrome\Application\chrome.exe"
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1588
    • 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:7 --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=106.0.5249.119 --initial-client-data=0xc0,0xc4,0xc8,0x94,0xcc,0x7fef29f9758,0x7fef29f9768,0x7fef29f9778
      2⤵
        PID:824
      • C:\Program Files\Google\Chrome\Application\chrome.exe
        "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=1164 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:2
        2⤵
          PID:596
        • 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 --mojo-platform-channel-handle=1504 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:8
          2⤵
            PID:3052
          • 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=utility --mojo-platform-channel-handle=1580 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:8
            2⤵
              PID:1596
            • C:\Program Files\Google\Chrome\Application\chrome.exe
              "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --first-renderer-process --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --mojo-platform-channel-handle=2228 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:1
              2⤵
                PID:1548
              • C:\Program Files\Google\Chrome\Application\chrome.exe
                "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --mojo-platform-channel-handle=2240 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:1
                2⤵
                  PID:2976
                • C:\Program Files\Google\Chrome\Application\chrome.exe
                  "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=gpu-process --gpu-preferences=UAAAAAAAAADgAAAYAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAEgAAAAAAAAASAAAAAAAAAAYAAAAAgAAABAAAAAAAAAAGAAAAAAAAAAQAAAAAAAAAAAAAAAOAAAAEAAAAAAAAAABAAAADgAAAAgAAAAAAAAACAAAAAAAAAA= --use-gl=angle --use-angle=swiftshader-webgl --mojo-platform-channel-handle=1160 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:2
                  2⤵
                    PID:2060
                  • C:\Program Files\Google\Chrome\Application\chrome.exe
                    "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --mojo-platform-channel-handle=1328 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:1
                    2⤵
                      PID:2508
                    • C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe
                      "C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe" --reenable-autoupdates --system-level
                      2⤵
                        PID:1516
                        • C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe
                          "C:\Program Files\Google\Chrome\Application\106.0.5249.119\Installer\setup.exe" --type=crashpad-handler /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler --database=C:\Windows\TEMP\Crashpad --url=https://clients2.google.com/cr/report --annotation=channel= --annotation=plat=Win64 --annotation=prod=Chrome --annotation=ver=106.0.5249.119 --initial-client-data=0x154,0x158,0x15c,0x128,0x160,0x13f817688,0x13f817698,0x13f8176a8
                          3⤵
                            PID:2024
                        • C:\Program Files\Google\Chrome\Application\chrome.exe
                          "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=utility --utility-sub-type=chrome.mojom.UtilWin --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=3668 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:8
                          2⤵
                            PID:1908
                          • C:\Program Files\Google\Chrome\Application\chrome.exe
                            "C:\Program Files\Google\Chrome\Application\chrome.exe" --type=renderer --display-capture-permissions-policy-allowed --disable-gpu-compositing --lang=en-US --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=10 --mojo-platform-channel-handle=3732 --field-trial-handle=1208,i,13520147157409893570,13840299112950662462,131072 /prefetch:1
                            2⤵
                              PID:992
                          • C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe
                            "C:\Program Files\Google\Chrome\Application\106.0.5249.119\elevation_service.exe"
                            1⤵
                              PID:2672

                            Network

                            MITRE ATT&CK Enterprise v15

                            Replay Monitor

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                            Downloads

                            • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

                              Filesize

                              342B

                              MD5

                              03da5ad8731fd0228cfb60684a9bc5f3

                              SHA1

                              41df0e8420dfbb2b89ea8acd07bd246402641a88

                              SHA256

                              c2587158e90498117a7a7378f7eab38b2aadf915b16ea36dc409eb2695241500

                              SHA512

                              071b86fb7be83c7baa368a89f3b5fbe2196b6c81533eb0ecde0451c7dd832c46a434e8983ce10744d5f57fe1e4721a5907deaa18b58cb365f9e7a269c9d575a1

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Cache\Cache_Data\f_000001

                              Filesize

                              215KB

                              MD5

                              d474ec7f8d58a66420b6daa0893a4874

                              SHA1

                              4314642571493ba983748556d0e76ec6704da211

                              SHA256

                              553a19b6f44f125d9594c02231e4217e9d74d92b7065dc996d92f1e53f6bcb69

                              SHA512

                              344062d1be40db095abb7392b047b16f33ea3043158690cf66a2fa554aa2db79c4aa68de1308f1eddf6b9140b9ac5de70aad960b4e8e8b91f105213c4aace348

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GCM Store\Encryption\000006.dbtmp

                              Filesize

                              16B

                              MD5

                              aefd77f47fb84fae5ea194496b44c67a

                              SHA1

                              dcfbb6a5b8d05662c4858664f81693bb7f803b82

                              SHA256

                              4166bf17b2da789b0d0cc5c74203041d98005f5d4ef88c27e8281e00148cd611

                              SHA512

                              b733d502138821948267a8b27401d7c0751e590e1298fda1428e663ccd02f55d0d2446ff4bc265bdcdc61f952d13c01524a5341bc86afc3c2cde1d8589b2e1c3

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1

                              Filesize

                              264KB

                              MD5

                              f50f89a0a91564d0b8a211f8921aa7de

                              SHA1

                              112403a17dd69d5b9018b8cede023cb3b54eab7d

                              SHA256

                              b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec

                              SHA512

                              bf8cda48cf1ec4e73f0dd1d4fa5562af1836120214edb74957430cd3e4a2783e801fa3f4ed2afb375257caeed4abe958265237d6e0aacf35a9ede7a2e8898d58

                            • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp

                              Filesize

                              16B

                              MD5

                              18e723571b00fb1694a3bad6c78e4054

                              SHA1

                              afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                              SHA256

                              8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                              SHA512

                              43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                            • C:\Users\Admin\AppData\Local\Temp\CabED3E.tmp

                              Filesize

                              70KB

                              MD5

                              49aebf8cbd62d92ac215b2923fb1b9f5

                              SHA1

                              1723be06719828dda65ad804298d0431f6aff976

                              SHA256

                              b33efcb95235b98b48508e019afa4b7655e80cf071defabd8b2123fc8b29307f

                              SHA512

                              bf86116b015fb56709516d686e168e7c9c68365136231cc51d0b6542ae95323a71d2c7acec84aad7dcecc2e410843f6d82a0a6d51b9acfc721a9c84fdd877b5b

                            • C:\Users\Admin\AppData\Local\Temp\TarED60.tmp

                              Filesize

                              181KB

                              MD5

                              4ea6026cf93ec6338144661bf1202cd1

                              SHA1

                              a1dec9044f750ad887935a01430bf49322fbdcb7

                              SHA256

                              8efbc21559ef8b1bcf526800d8070baad42474ce7198e26fa771dbb41a76b1d8

                              SHA512

                              6c7e0980e39aacf4c3689802353f464a08cd17753bd210ee997e5f2a455deb4f287a9ef74d84579dbde49bc96213cd2b8b247723919c412ea980aa6e6bfe218b

                            • \Users\Admin\AppData\Local\Temp\Files\discord.exe

                              Filesize

                              3.1MB

                              MD5

                              6a0bb84dcd837e83638f4292180bf5ab

                              SHA1

                              20e31ccffe1ac806e75ea839ea90b4c91e4322c5

                              SHA256

                              e119fe767f3d10a387df1951d4b356384c5a9d0441b4034ddf7293c389a410b4

                              SHA512

                              d0d61815c1ca73e4d1b8d5c3ea61e0572bfa9f6e984247b8e66c22e5591d61f766c6476c2686ce611917a56f2d4d8b8ddb4efcdbed707855e4190a2404eedcc5

                            • memory/1308-178-0x0000000000870000-0x0000000000B94000-memory.dmp

                              Filesize

                              3.1MB

                            • memory/1980-179-0x0000000074BEE000-0x0000000074BEF000-memory.dmp

                              Filesize

                              4KB

                            • memory/1980-180-0x0000000074BE0000-0x00000000752CE000-memory.dmp

                              Filesize

                              6.9MB

                            • memory/1980-0-0x0000000074BEE000-0x0000000074BEF000-memory.dmp

                              Filesize

                              4KB

                            • memory/1980-2-0x0000000074BE0000-0x00000000752CE000-memory.dmp

                              Filesize

                              6.9MB

                            • memory/1980-1-0x0000000000C20000-0x0000000000C28000-memory.dmp

                              Filesize

                              32KB

                            • memory/2748-161-0x0000000000D90000-0x00000000010B4000-memory.dmp

                              Filesize

                              3.1MB

                            • memory/2812-162-0x000000005FFF0000-0x0000000060000000-memory.dmp

                              Filesize

                              64KB