Analysis

  • max time kernel
    15s
  • max time network
    7s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/09/2024, 22:25

General

  • Target
    Dehasher.exe
  • Size 1.1MB
  • Sample240930-2bx7aasbmb
  • SHA256 76a429a6968d22df6339119f21f83ad0337ad9d60be818b328dbdc8cacfbcaeb
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • asyncrat

Botnet
  • Default

C2
  • 127.0.0.1:6606

  • 127.0.0.1:7707

  • 127.0.0.1:8808

  • https://api.telegram.org/bot7044437613:AAEXeS1SKGTrEjQ8F-7vSegWo8OLABeJY5k/sendMessage?chat_id=6052812018

Mutex
  • AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Detect Neshta payload 2 IoCs
  • Neshta

    Malware from the neshta family is designed to infect itself into other files to spread itself and cause damage.

  • StormKitty

    StormKitty is an open source info stealer written in C#.

  • StormKitty payload 3 IoCs
  • Async RAT payload 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Modifies system executable filetype association 2 TTPs 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 7 IoCs
  • Drops file in Program Files directory 64 IoCs
  • Drops file in Windows directory 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).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • System Location Discovery: System Language Discovery 1 TTPs 11 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Wi-Fi Discovery 1 TTPs 2 IoCs

    Adversaries may search for information about Wi-Fi networks, such as network names and passwords, on compromised systems.

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 25 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Dehasher.exe
    "C:\Users\Admin\AppData\Local\Temp\Dehasher.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2344
    • C:\Users\Admin\AppData\Local\Temp\LET.EXE
      "C:\Users\Admin\AppData\Local\Temp\LET.EXE"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Modifies system executable filetype association
      • Drops file in Program Files directory
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Modifies registry class
      • Suspicious use of WriteProcessMemory
      PID:1708
      • C:\Users\Admin\AppData\Local\Temp\3582-490\LET.EXE
        "C:\Users\Admin\AppData\Local\Temp\3582-490\LET.EXE"
        3⤵
        • Executes dropped EXE
        • Drops desktop.ini file(s)
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1040
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
          4⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Wi-Fi Discovery
          PID:4688
          • C:\Windows\SysWOW64\chcp.com
            chcp 65001
            5⤵
            • System Location Discovery: System Language Discovery
            PID:1700
          • C:\Windows\SysWOW64\netsh.exe
            netsh wlan show profile
            5⤵
            • Event Triggered Execution: Netsh Helper DLL
            • System Location Discovery: System Language Discovery
            • System Network Configuration Discovery: Wi-Fi Discovery
            PID:5004
          • C:\Windows\SysWOW64\findstr.exe
            findstr All
            5⤵
            • System Location Discovery: System Language Discovery
            PID:4780
        • C:\Windows\SysWOW64\cmd.exe
          "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:432
          • C:\Windows\SysWOW64\chcp.com
            chcp 65001
            5⤵
            • System Location Discovery: System Language Discovery
            PID:2344
          • C:\Windows\SysWOW64\netsh.exe
            netsh wlan show networks mode=bssid
            5⤵
            • Event Triggered Execution: Netsh Helper DLL
            • System Location Discovery: System Language Discovery
            PID:2824
    • C:\Users\Admin\AppData\Local\Temp\VIPERDEHASHER.EXE
      "C:\Users\Admin\AppData\Local\Temp\VIPERDEHASHER.EXE"
      2⤵
      • Executes dropped EXE
      • System Location Discovery: System Language Discovery
      PID:4336

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        Bookmarks.txt

        • Path C:\Users\Admin\AppData\Local\7118e685d4aa6b91f43797eecc33b54b\Admin@OARDHGDN_en-US\Browsers\Firefox\Bookmarks.txt
        • Size 105B
        • SHA256 c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142
        • MD5 SHA1 SHA512

        Process.txt

        • Path C:\Users\Admin\AppData\Local\7118e685d4aa6b91f43797eecc33b54b\Admin@OARDHGDN_en-US\System\Process.txt
        • Size 4KB
        • SHA256 cfe8a4df99784bcc6f2d0778a286424cda5750c5c0f8f3c28f3d5d85108e6124
        • MD5 SHA1 SHA512 SSDEEP

        LET.EXE

        • Path C:\Users\Admin\AppData\Local\Temp\3582-490\LET.EXE
        • Size 175KB
        • SHA256 4902c56dfa5b513df7c00f8fe5df90dcc46a03f194dca424ebbf6f03e7904486
        • MD5 SHA1 SHA512 SSDEEP

        LET.EXE

        • Path C:\Users\Admin\AppData\Local\Temp\LET.EXE
        • Size 216KB
        • SHA256 51c82632119b14af345b42ec4bce4c780d81502b8ec67b63b631c6830fb845d6
        • MD5 SHA1 SHA512 SSDEEP

        VIPERDEHASHER.EXE

        • Path C:\Users\Admin\AppData\Local\Temp\VIPERDEHASHER.EXE
        • Size 892KB
        • SHA256 93f31fdee5f1701424d12d3445d2c8afdf8073f79ebccf0c61e173b9b20b90a9
        • MD5 SHA1 SHA512 SSDEEP

        memory/1040-235-0x0000000073C10000-0x00000000743C0000-memory.dmp

        memory/1040-33-0x0000000000EA0000-0x0000000000ED2000-memory.dmp

        memory/1040-276-0x0000000006490000-0x000000000649A000-memory.dmp

        memory/1040-35-0x0000000005730000-0x0000000005796000-memory.dmp

        memory/1040-34-0x0000000073C10000-0x00000000743C0000-memory.dmp

        memory/1040-38-0x0000000073C10000-0x00000000743C0000-memory.dmp

        memory/1040-256-0x0000000073C10000-0x00000000743C0000-memory.dmp

        memory/1708-272-0x0000000000400000-0x000000000041B000-memory.dmp

        memory/4336-37-0x0000000005880000-0x0000000005912000-memory.dmp

        memory/4336-234-0x0000000073C1E000-0x0000000073C1F000-memory.dmp

        memory/4336-32-0x0000000000E40000-0x0000000000F24000-memory.dmp

        memory/4336-31-0x0000000073C1E000-0x0000000073C1F000-memory.dmp

        memory/4336-40-0x0000000005810000-0x000000000581A000-memory.dmp

        memory/4336-39-0x0000000073C10000-0x00000000743C0000-memory.dmp

        memory/4336-273-0x0000000073C10000-0x00000000743C0000-memory.dmp

        memory/4336-36-0x0000000005D90000-0x0000000006334000-memory.dmp