Overview

overview

10

Static

static

10

vnm/7z.exe

windows10-2004-x64

1

vnm/Plugin...er.exe

windows10-2004-x64

1

vnm/Stub/Client.exe

windows10-2004-x64

10

vnm/Stub/client.exe

windows10-2004-x64

10

vnm/VenomRAT_HVNC.exe

windows10-2004-x64

10

vnm/client.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    26s
  • max time network
    40s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-07-2023 18:57

Sharing

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General

  • Target

    vnm/Stub/client.exe

  • Size

    144KB

  • MD5

    f4fdcb900e7af47100ac9e46945fbd55

  • SHA1

    c1d235a9a2cae8d5a8d4f6ceb4eab9417e1b1fb2

  • SHA256

    9160b90fa4a6a9cf22f943dba92cec64e2dc03c2317b5d9ab50a753fc410ce43

  • SHA512

    236eef98d4695a5e1224a87a1dc598639e5c49f6dd192a96cc1b9f8305faa57078deb62d73906a33ba1c1fac4fa5ccc5f344a0f196dbba718b76a36667984ac2

  • SSDEEP

    3072:Bsp9iv+DYM5ob0HGNSKsstcnZTJQDgWPaySsdH5boWz:Op9iTMSb0mgKFcQjhdH

Score
10/10
arrowratasyncrat%group%persistencerat

Malware Config

Extracted

Family

arrowrat

Botnet

%Group%

C2

%Hosts%:%Ports%

Mutex

%MTX%

Signatures

  • ArrowRat

    Remote access tool with various capabilities first seen in late 2021.

    ratarrowrat
  • AsyncRat

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

    ratasyncrat
  • Async RAT payload 1 IoCs
    rat
  • Modifies Installed Components in the registry 2 TTPs 1 IoCs
    persistence
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 5 IoCs
  • Checks SCSI registry key(s) 3 TTPs 22 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Modifies Internet Explorer settings 1 TTPs 6 IoCs
    adwarespyware
  • Modifies registry class 64 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of FindShellTrayWindow 46 IoCs
  • Suspicious use of SendNotifyMessage 20 IoCs
  • Suspicious use of SetWindowsHookEx 5 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\vnm\Stub\client.exe
    "C:\Users\Admin\AppData\Local\Temp\vnm\Stub\client.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3188
    • C:\Windows\explorer.exe
      "C:\Windows\explorer.exe"
      2⤵
      • Modifies Installed Components in the registry
      • Enumerates connected drives
      • Checks SCSI registry key(s)
      • Modifies registry class
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      PID:2872
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" %Group% %Hosts% %Ports% %MTX%
      2⤵
        PID:3032
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" %Group% %Hosts% %Ports% %MTX%
        2⤵
          PID:2360
      • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
        "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
        1⤵
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:4928
      • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
        "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
        1⤵
        • Modifies Internet Explorer settings
        • Modifies registry class
        • Suspicious use of SetWindowsHookEx
        PID:648
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -u -p 648 -s 3884
          2⤵
          • Program crash
          PID:3368
      • C:\Windows\system32\WerFault.exe
        C:\Windows\system32\WerFault.exe -pss -s 408 -p 648 -ip 648
        1⤵
          PID:1512
        • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
          "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
          1⤵
          • Modifies Internet Explorer settings
          • Modifies registry class
          • Suspicious use of SetWindowsHookEx
          PID:216
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -u -p 216 -s 3984
            2⤵
            • Program crash
            PID:4936
        • C:\Windows\system32\WerFault.exe
          C:\Windows\system32\WerFault.exe -pss -s 520 -p 216 -ip 216
          1⤵
            PID:2360
          • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
            "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
            1⤵
            • Modifies Internet Explorer settings
            • Modifies registry class
            • Suspicious use of SetWindowsHookEx
            PID:4796
            • C:\Windows\system32\WerFault.exe
              C:\Windows\system32\WerFault.exe -u -p 4796 -s 3580
              2⤵
              • Program crash
              PID:4016
          • C:\Windows\system32\WerFault.exe
            C:\Windows\system32\WerFault.exe -pss -s 496 -p 4796 -ip 4796
            1⤵
              PID:4880
            • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
              "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
              1⤵
              • Suspicious use of SetWindowsHookEx
              PID:3792
              • C:\Windows\system32\WerFault.exe
                C:\Windows\system32\WerFault.exe -u -p 3792 -s 3604
                2⤵
                • Program crash
                PID:4100
            • C:\Windows\system32\WerFault.exe
              C:\Windows\system32\WerFault.exe -pss -s 416 -p 3792 -ip 3792
              1⤵
                PID:3300
              • C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe
                "C:\Windows\SystemApps\Microsoft.Windows.Search_cw5n1h2txyewy\SearchApp.exe" -ServerName:CortanaUI.AppX8z9r6jm96hw4bsbneegw0kyxx296wr9t.mca
                1⤵
                  PID:4368
                  • C:\Windows\system32\WerFault.exe
                    C:\Windows\system32\WerFault.exe -u -p 4368 -s 3600
                    2⤵
                    • Program crash
                    PID:4488
                • C:\Windows\system32\WerFault.exe
                  C:\Windows\system32\WerFault.exe -pss -s 416 -p 4368 -ip 4368
                  1⤵
                    PID:3596

                  Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

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                  Downloads

                  • C:\Users\Admin\AppData\Local\Packages\Microsoft.Windows.Search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\S331LB7M\microsoft.windows[1].xml
                    Filesize

                    97B

                    MD5

                    402e0c5b12db3a5ffb0bece9995d459b

                    SHA1

                    f0138de23eb90c99efb1d0b1bd0dac8f1e7102a2

                    SHA256

                    6272b42676075c969ca60882f74e3c1711a3b6db824c9bb9b7f5b412e2131bc2

                    SHA512

                    5caea684bcc1aa6b3ade82c94fbab992c65f3b543a999f1435c683ec785eab784e86940545cdc35641401f1ead5d28dddf5ccb34156a054c36b566fc8cbbe8f2

                    Download Submit

                  • C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\S331LB7M\microsoft.windows[1].xml
                    Filesize

                    97B

                    MD5

                    402e0c5b12db3a5ffb0bece9995d459b

                    SHA1

                    f0138de23eb90c99efb1d0b1bd0dac8f1e7102a2

                    SHA256

                    6272b42676075c969ca60882f74e3c1711a3b6db824c9bb9b7f5b412e2131bc2

                    SHA512

                    5caea684bcc1aa6b3ade82c94fbab992c65f3b543a999f1435c683ec785eab784e86940545cdc35641401f1ead5d28dddf5ccb34156a054c36b566fc8cbbe8f2

                    Download Submit

                  • C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\S331LB7M\microsoft.windows[1].xml
                    Filesize

                    97B

                    MD5

                    402e0c5b12db3a5ffb0bece9995d459b

                    SHA1

                    f0138de23eb90c99efb1d0b1bd0dac8f1e7102a2

                    SHA256

                    6272b42676075c969ca60882f74e3c1711a3b6db824c9bb9b7f5b412e2131bc2

                    SHA512

                    5caea684bcc1aa6b3ade82c94fbab992c65f3b543a999f1435c683ec785eab784e86940545cdc35641401f1ead5d28dddf5ccb34156a054c36b566fc8cbbe8f2

                    Download Submit

                  • C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\S331LB7M\microsoft.windows[1].xml
                    Filesize

                    97B

                    MD5

                    402e0c5b12db3a5ffb0bece9995d459b

                    SHA1

                    f0138de23eb90c99efb1d0b1bd0dac8f1e7102a2

                    SHA256

                    6272b42676075c969ca60882f74e3c1711a3b6db824c9bb9b7f5b412e2131bc2

                    SHA512

                    5caea684bcc1aa6b3ade82c94fbab992c65f3b543a999f1435c683ec785eab784e86940545cdc35641401f1ead5d28dddf5ccb34156a054c36b566fc8cbbe8f2

                    Download Submit

                  • C:\Users\Admin\AppData\Local\Packages\microsoft.windows.search_cw5n1h2txyewy\AC\Microsoft\Internet Explorer\DOMStore\S331LB7M\microsoft.windows[1].xml
                    Filesize

                    97B

                    MD5

                    402e0c5b12db3a5ffb0bece9995d459b

                    SHA1

                    f0138de23eb90c99efb1d0b1bd0dac8f1e7102a2

                    SHA256

                    6272b42676075c969ca60882f74e3c1711a3b6db824c9bb9b7f5b412e2131bc2

                    SHA512

                    5caea684bcc1aa6b3ade82c94fbab992c65f3b543a999f1435c683ec785eab784e86940545cdc35641401f1ead5d28dddf5ccb34156a054c36b566fc8cbbe8f2

                    Download Submit

                  • memory/216-174-0x000001CF5DF50000-0x000001CF5DF70000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/216-172-0x000001CF5DB40000-0x000001CF5DB60000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/216-170-0x000001CF5DB80000-0x000001CF5DBA0000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/648-154-0x000002A470400000-0x000002A470420000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/648-157-0x000002A470810000-0x000002A470830000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/648-151-0x000002A470440000-0x000002A470460000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/2360-141-0x0000000005EE0000-0x0000000006484000-memory.dmp

                    Filesize

                    5.6MB

                    Download

                  • memory/2360-137-0x00000000748D0000-0x0000000075080000-memory.dmp

                    Filesize

                    7.7MB

                    Download

                  • memory/2360-143-0x00000000748D0000-0x0000000075080000-memory.dmp

                    Filesize

                    7.7MB

                    Download

                  • memory/2360-140-0x0000000005820000-0x0000000005830000-memory.dmp

                    Filesize

                    64KB

                    Download

                  • memory/2360-139-0x0000000005650000-0x00000000056EC000-memory.dmp

                    Filesize

                    624KB

                    Download

                  • memory/2360-138-0x00000000055B0000-0x0000000005642000-memory.dmp

                    Filesize

                    584KB

                    Download

                  • memory/2360-134-0x0000000000400000-0x0000000000410000-memory.dmp

                    Filesize

                    64KB

                    Download

                  • memory/2872-144-0x0000000003160000-0x0000000003161000-memory.dmp

                    Filesize

                    4KB

                    Download

                  • memory/3188-162-0x00007FFB4EF20000-0x00007FFB4F9E1000-memory.dmp

                    Filesize

                    10.8MB

                    Download

                  • memory/3188-133-0x0000012D3B6C0000-0x0000012D3B6EA000-memory.dmp

                    Filesize

                    168KB

                    Download

                  • memory/3188-136-0x00007FFB4EF20000-0x00007FFB4F9E1000-memory.dmp

                    Filesize

                    10.8MB

                    Download

                  • memory/3792-212-0x00000131F3540000-0x00000131F3560000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/3792-214-0x00000131F3500000-0x00000131F3520000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/3792-216-0x00000131F3900000-0x00000131F3920000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/4368-233-0x0000028B50260000-0x0000028B50280000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/4368-235-0x0000028B50220000-0x0000028B50240000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/4368-237-0x0000028B50840000-0x0000028B50860000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/4796-193-0x00000224D3E00000-0x00000224D3E20000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/4796-195-0x00000224D4210000-0x00000224D4230000-memory.dmp

                    Filesize

                    128KB

                    Download

                  • memory/4796-191-0x00000224D3E40000-0x00000224D3E60000-memory.dmp

                    Filesize

                    128KB

                    Download