Analysis

  • max time kernel
    69s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    09-01-2025 09:33

General

  • Target

    image logger.exe

  • Size

    3.1MB

  • MD5

    c1681b5b8a3f9d40d46c6bdaaa66083d

  • SHA1

    51e7ec6ba88909bd2de4ec9b36cc31948624e4f3

  • SHA256

    6a97a356e44ccd5f33ac40934f77e796faca89403e2daae4f36c66ff52cbb22f

  • SHA512

    8ce33bd2c8f40ae92acbae4898bfff51a699f91c8f70b212921fbfbf2bf9b523a4049ee421d7e0d559e29a4df6faa27707d03fa987917ce7077c635090be4fff

  • SSDEEP

    49152:uvnI22SsaNYfdPBldt698dBcjHWFwGGBeFLoqdhuTHHB72eh2NT:uvI22SsaNYfdPBldt6+dBcjHTGX

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.18.43:4782

Mutex

8f30f04b-4a42-46fb-9c42-479d848d3ab8

Attributes
  • encryption_key

    4767B12C6A8C8F78710F92C585FA862093584320

  • 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 family
  • 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 50 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\image logger.exe
    "C:\Users\Admin\AppData\Local\Temp\image logger.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2388
    • 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:2468
    • 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:2820
      • 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:2836
  • 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:2588
    • 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,0x7fef2099758,0x7fef2099768,0x7fef2099778
      2⤵
        PID:2772
      • 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=1144 --field-trial-handle=1408,i,16196431696721204140,2883009255927921277,131072 /prefetch:2
        2⤵
          PID:2320
        • 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=1512 --field-trial-handle=1408,i,16196431696721204140,2883009255927921277,131072 /prefetch:8
          2⤵
            PID:3020
          • 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=1644 --field-trial-handle=1408,i,16196431696721204140,2883009255927921277,131072 /prefetch:8
            2⤵
              PID:3052
            • 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=2156 --field-trial-handle=1408,i,16196431696721204140,2883009255927921277,131072 /prefetch:1
              2⤵
                PID:2952
              • 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=2164 --field-trial-handle=1408,i,16196431696721204140,2883009255927921277,131072 /prefetch:1
                2⤵
                  PID:1984
                • 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=1608 --field-trial-handle=1408,i,16196431696721204140,2883009255927921277,131072 /prefetch:2
                  2⤵
                    PID:1932
                  • 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=1436 --field-trial-handle=1408,i,16196431696721204140,2883009255927921277,131072 /prefetch:1
                    2⤵
                      PID:2680
                    • 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=2592 --field-trial-handle=1408,i,16196431696721204140,2883009255927921277,131072 /prefetch:8
                      2⤵
                        PID:1696
                    • 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:2024

                      Network

                      MITRE ATT&CK Enterprise v15

                      Replay Monitor

                      Loading Replay Monitor...

                      Downloads

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

                        Filesize

                        16B

                        MD5

                        18e723571b00fb1694a3bad6c78e4054

                        SHA1

                        afcc0ef32d46fe59e0483f9a3c891d3034d12f32

                        SHA256

                        8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa

                        SHA512

                        43bb0af7d3984012d2d67ca6b71f0201e5b948e6fe26a899641c4c6f066c59906d468ddf7f1df5ea5fa33c2bc5ea8219c0f2c82e0a5c365ad7581b898a8859e2

                      • 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

                        4KB

                        MD5

                        9db0ecd1db086b5485c5d843269774d2

                        SHA1

                        09fc1eae9ffabca74ec0464f85d3945cbd0b38ba

                        SHA256

                        ebc216a04bd6d24b1ad0009d88b8d400255b7a5b8af4f48f30b725910b9a38fb

                        SHA512

                        e473231c45300b20ab4e052c82c91a2cda20c99019e9baa458a7d84da0631d105d900ac8c59159a182c3698aae1db341280692a671b788dd093a9105e6383a8e

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

                        Filesize

                        4KB

                        MD5

                        92d845131ccd63360735df5c5370c484

                        SHA1

                        6d072a3b42e2d00bd54cc057ac88e295ca1a482a

                        SHA256

                        c8d254bea05b791c010c70c75a3a8378f226646842c9bd1edcb2a39a6a14718e

                        SHA512

                        33860a1a996520b3f4c1bb6b57c3a0d6b76188d40b28f6b70dc845785081c063a8460eed7715ef27b12048950c410f8a9380115bb05f0a81358917e032c20325

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

                        Filesize

                        3.1MB

                        MD5

                        c1681b5b8a3f9d40d46c6bdaaa66083d

                        SHA1

                        51e7ec6ba88909bd2de4ec9b36cc31948624e4f3

                        SHA256

                        6a97a356e44ccd5f33ac40934f77e796faca89403e2daae4f36c66ff52cbb22f

                        SHA512

                        8ce33bd2c8f40ae92acbae4898bfff51a699f91c8f70b212921fbfbf2bf9b523a4049ee421d7e0d559e29a4df6faa27707d03fa987917ce7077c635090be4fff

                      • memory/2388-1-0x0000000001000000-0x0000000001324000-memory.dmp

                        Filesize

                        3.1MB

                      • memory/2388-2-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

                        Filesize

                        9.9MB

                      • memory/2388-0-0x000007FEF5E03000-0x000007FEF5E04000-memory.dmp

                        Filesize

                        4KB

                      • memory/2388-8-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

                        Filesize

                        9.9MB

                      • memory/2820-10-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

                        Filesize

                        9.9MB

                      • memory/2820-13-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

                        Filesize

                        9.9MB

                      • memory/2820-12-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

                        Filesize

                        9.9MB

                      • memory/2820-11-0x000007FEF5E00000-0x000007FEF67EC000-memory.dmp

                        Filesize

                        9.9MB

                      • memory/2820-9-0x0000000000350000-0x0000000000674000-memory.dmp

                        Filesize

                        3.1MB