Analysis

  • max time kernel
    71s
  • max time network
    98s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    02-08-2024 18:12

General

  • Target

    Nuke Loader.exe

  • Size

    3.1MB

  • MD5

    ed675e5b50992702716b65c5b15bd2ee

  • SHA1

    2463edfe3d1667933aa2676876f4ac766450ff90

  • SHA256

    c4b6a54ec0f46c8c0df7d9f5f010c10c66ec23378b4548727fbfa2b3080ebf56

  • SHA512

    7747767ebb54a2973bde62e41e823588b9bde30d3d6e7648827b224d085daaff10a65a6b71a97c58d4c53f37e1a111587fe5834ac8168779bcdb4e4e266ef44b

  • SSDEEP

    49152:3vnI22SsaNYfdPBldt698dBcjHdDRJ6tbR3LoGdkTHHB72eh2NT:3vI22SsaNYfdPBldt6+dBcjHdDRJ6/

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.51:4782

Mutex

b83cbaf1-3ce5-43f8-a42a-f845d8ef5467

Attributes
  • encryption_key

    7F14878C24A186BCD9E69BFA124C76DC41F0C9A7

  • 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 payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 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: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 10 IoCs
  • Suspicious use of FindShellTrayWindow 35 IoCs
  • Suspicious use of SendNotifyMessage 33 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\Nuke Loader.exe
    "C:\Users\Admin\AppData\Local\Temp\Nuke Loader.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2564
    • 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:2704
    • 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 FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2724
      • 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:2688
  • C:\Windows\explorer.exe
    "C:\Windows\explorer.exe"
    1⤵
      PID:2644
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      1⤵
        PID:708
      • 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:1736
        • 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,0x7feee999758,0x7feee999768,0x7feee999778
          2⤵
            PID:1968
          • 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=1148 --field-trial-handle=1332,i,1337797323151470819,13546893513996321108,131072 /prefetch:2
            2⤵
              PID:2268
            • 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=1500 --field-trial-handle=1332,i,1337797323151470819,13546893513996321108,131072 /prefetch:8
              2⤵
                PID:2204
              • 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=1620 --field-trial-handle=1332,i,1337797323151470819,13546893513996321108,131072 /prefetch:8
                2⤵
                  PID:2200
                • 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=2136 --field-trial-handle=1332,i,1337797323151470819,13546893513996321108,131072 /prefetch:1
                  2⤵
                    PID:2256
                  • 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=1612 --field-trial-handle=1332,i,1337797323151470819,13546893513996321108,131072 /prefetch:1
                    2⤵
                      PID:2272
                    • 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=1520 --field-trial-handle=1332,i,1337797323151470819,13546893513996321108,131072 /prefetch:2
                      2⤵
                        PID:1028
                      • 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=1492 --field-trial-handle=1332,i,1337797323151470819,13546893513996321108,131072 /prefetch:1
                        2⤵
                          PID:1604
                        • 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=3652 --field-trial-handle=1332,i,1337797323151470819,13546893513996321108,131072 /prefetch:8
                          2⤵
                            PID:2728
                        • 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:2300

                          Network

                          MITRE ATT&CK Enterprise v15

                          Replay Monitor

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                          Downloads

                          • C:\Users\Admin\AppData\Local\Google\Chrome\User Data\762f3abe-9fde-408c-b2aa-b3340ff4e47f.tmp

                            Filesize

                            311KB

                            MD5

                            98e462c967b1e5295fd32e42fa6457ff

                            SHA1

                            1e137af69bc1e6d0f17dfac14d33966900bf0949

                            SHA256

                            10cbf5862dcba9ca2801a6482ee10c91eaf978d8b641af79faf5dbdeee9106e1

                            SHA512

                            324da6fbfd308a3e4969e510e5c6eca83759856e5147c419059396519842eece3d03e7729df61bcbc2185270ebdca7372197d873ff523793c38cdd644d0198a8

                          • 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\Preferences

                            Filesize

                            5KB

                            MD5

                            2957382db9e3cad6d2864d79449ddc48

                            SHA1

                            686021b91209e2a4fbd1ec8ff8255b1e1e309014

                            SHA256

                            9971f3a01b2e42edf76578b6ac1e1293f516da6602ee6f1bcccafa745135c932

                            SHA512

                            0f23abd2bf36a62076b321d1f665dd2356eeb78cb32f54cc76ed0caa5e16a8d22726fe7915258ed41ae1f2321560e3cbea00b5175080d20de6e554d7893a3e46

                          • 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\Google\Chrome\User Data\Local State

                            Filesize

                            311KB

                            MD5

                            80f2084cd75bbc8a08ae1e479f3d1a25

                            SHA1

                            21b4ef3dc2e43f481e72a648b1cc35736d3dca32

                            SHA256

                            058020eb938a80639078ba07fd772836a839f9de29cf5db37134f65d0ef4327d

                            SHA512

                            aa4cecb2346fb344e5f6fabcc98e59df7b51219bcfdeac18a3eede47d55a092b8d5eadb80d225815ba52dd40ccd2953ea570b658103ee39c024bbefcc90ff2df

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

                            Filesize

                            3.1MB

                            MD5

                            ed675e5b50992702716b65c5b15bd2ee

                            SHA1

                            2463edfe3d1667933aa2676876f4ac766450ff90

                            SHA256

                            c4b6a54ec0f46c8c0df7d9f5f010c10c66ec23378b4548727fbfa2b3080ebf56

                            SHA512

                            7747767ebb54a2973bde62e41e823588b9bde30d3d6e7648827b224d085daaff10a65a6b71a97c58d4c53f37e1a111587fe5834ac8168779bcdb4e4e266ef44b

                          • \??\pipe\crashpad_1736_EMSRIKFREJDVLIXR

                            MD5

                            d41d8cd98f00b204e9800998ecf8427e

                            SHA1

                            da39a3ee5e6b4b0d3255bfef95601890afd80709

                            SHA256

                            e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

                            SHA512

                            cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

                          • memory/2564-1-0x0000000000E60000-0x0000000001184000-memory.dmp

                            Filesize

                            3.1MB

                          • memory/2564-2-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp

                            Filesize

                            9.9MB

                          • memory/2564-0-0x000007FEF5013000-0x000007FEF5014000-memory.dmp

                            Filesize

                            4KB

                          • memory/2564-9-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp

                            Filesize

                            9.9MB

                          • memory/2724-8-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp

                            Filesize

                            9.9MB

                          • memory/2724-12-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp

                            Filesize

                            9.9MB

                          • memory/2724-10-0x0000000001350000-0x0000000001674000-memory.dmp

                            Filesize

                            3.1MB

                          • memory/2724-11-0x000007FEF5010000-0x000007FEF59FC000-memory.dmp

                            Filesize

                            9.9MB