Analysis

  • max time kernel
    42s
  • max time network
    43s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    31-08-2024 20:16

General

  • Target

    WinRAR 7.01 Pro.exe

  • Size

    4.3MB

  • MD5

    1c8908102946928867ab16f2007b35cc

  • SHA1

    7e08b98299e0195a013e53221e3c2efb149eb4ce

  • SHA256

    e3635b82438e536636955e2fee251073b1038a7e00295a1e0efb003ad49965d5

  • SHA512

    a559caedc7b00da23cb18607d0f2f05c6954a949dff0c8a4c25f6353163b70fd16722728878bb87c9db5cff86dc0252f967ebc26a66cb975af85f1361372a734

  • SSDEEP

    98304:DaxGFtNdBfKEgzVQYAO52weo3VudIlHSTNWA0rkjEaxKd:DRdytzAO52wLVu2oBWv7t

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/bot5912059723:AAEvmpZvnGHJALjBBXk_PBuStnzDRsTe4-M/sendMessage?chat_id=750182271

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#.

  • StormKitty

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

  • StormKitty payload 1 IoCs
  • Async RAT payload 1 IoCs
  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • .NET Reactor proctector 35 IoCs

    Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Drops desktop.ini file(s) 8 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 9 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.

  • Suspicious behavior: EnumeratesProcesses 26 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\WinRAR 7.01 Pro.exe
    "C:\Users\Admin\AppData\Local\Temp\WinRAR 7.01 Pro.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4724
    • C:\Users\Admin\AppData\Local\Temp\winrar_x64_701ar.exe
      "C:\Users\Admin\AppData\Local\Temp\winrar_x64_701ar.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of SetWindowsHookEx
      PID:3852
    • C:\Users\Admin\AppData\Local\Temp\_microsoft_corporation.exe
      "C:\Users\Admin\AppData\Local\Temp\_microsoft_corporation.exe"
      2⤵
      • 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:640
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Wi-Fi Discovery
        • Suspicious use of WriteProcessMemory
        PID:2768
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4372
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show profile
          4⤵
          • Event Triggered Execution: Netsh Helper DLL
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Wi-Fi Discovery
          PID:3660
        • C:\Windows\SysWOW64\findstr.exe
          findstr All
          4⤵
          • System Location Discovery: System Language Discovery
          PID:4060
      • C:\Windows\SysWOW64\cmd.exe
        "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:3920
        • C:\Windows\SysWOW64\chcp.com
          chcp 65001
          4⤵
          • System Location Discovery: System Language Discovery
          PID:3860
        • C:\Windows\SysWOW64\netsh.exe
          netsh wlan show networks mode=bssid
          4⤵
          • Event Triggered Execution: Netsh Helper DLL
          • System Location Discovery: System Language Discovery
          PID:1300
  • C:\Windows\system32\werfault.exe
    werfault.exe /h /shared Global\f4a117cd0eea4d6eabe1ad87557dd303 /t 1028 /p 3852
    1⤵
      PID:4524
    • C:\Windows\System32\rundll32.exe
      C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
      1⤵
        PID:2408

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\9f14789e79876668fdc6516ab714a73e\Admin@KZYBFHMK_en-US\Browsers\Firefox\Bookmarks.txt

        Filesize

        105B

        MD5

        2e9d094dda5cdc3ce6519f75943a4ff4

        SHA1

        5d989b4ac8b699781681fe75ed9ef98191a5096c

        SHA256

        c84c98bbf5e0ef9c8d0708b5d60c5bb656b7d6be5135d7f7a8d25557e08cf142

        SHA512

        d1f7eed00959e902bdb2125b91721460d3ff99f3bdfc1f2a343d4f58e8d4e5e5a06c0c6cdc0379211c94510f7c00d7a8b34fa7d0ca0c3d54cbbe878f1e9812b7

      • C:\Users\Admin\AppData\Local\9f14789e79876668fdc6516ab714a73e\Admin@KZYBFHMK_en-US\System\Process.txt

        Filesize

        4KB

        MD5

        5af12d507f677247242d24233c78b5f6

        SHA1

        67502a609fcda677839a2267bda8df7d0a30a4ac

        SHA256

        3fcce7dc9416252893b80161c18e50d5c9292ce060126d4947c4a514282960b3

        SHA512

        d7343feabe2e4ce97ae8648cdf7a010ff6c05fcf88fee6f60ba7a1d33a88609679ca8f79bd383f24bc85600c496fa52380c6eec90939109d58e519caa118e862

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

        Filesize

        487KB

        MD5

        b2795fbed63c8c1b0846b3eaeae2fe0f

        SHA1

        d1145cff21e008c9ad581ccf1719139d754355de

        SHA256

        5ea467d548d41b747370a235c9a245910ed58d55482a48246196faf391213c24

        SHA512

        47ffcc3c74113db4c389ba9a6b5db7ce325d1f63e431405a9f6613918c387de4a677f20804aad6aa458bf2151de418c2f72740f4f5083fb45bf6c4b0f564e564

      • C:\Users\Admin\AppData\Local\Temp\winrar_x64_701ar.exe

        Filesize

        3.8MB

        MD5

        5e2849bef6a38ed0b163ea6128afea01

        SHA1

        d77e1467dcd5e6662a6b97de35cb017579af032a

        SHA256

        6ec13e13059bac123d839fde5770db2c87248ef862d21f5f818580287a365026

        SHA512

        e20bcb346b114c5e6f8f0e82d2143a7c02ffc77056983336a011fbe8e292d8fa0ed8d2aebaa6f665ffacfa1063f59a2788bc68bbe2605316d7791eec3a1e1cfb

      • memory/640-67-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-29-0x00000000026F0000-0x00000000027D2000-memory.dmp

        Filesize

        904KB

      • memory/640-28-0x0000000004D20000-0x00000000052C4000-memory.dmp

        Filesize

        5.6MB

      • memory/640-63-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-41-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-44-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-77-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-81-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-93-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-91-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-89-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-87-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-85-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-83-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-79-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-61-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-71-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-69-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-2436-0x0000000006340000-0x000000000634A000-memory.dmp

        Filesize

        40KB

      • memory/640-75-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-2432-0x0000000006210000-0x00000000062A2000-memory.dmp

        Filesize

        584KB

      • memory/640-27-0x00000000027E0000-0x00000000028C4000-memory.dmp

        Filesize

        912KB

      • memory/640-73-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-59-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-55-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-53-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-49-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-47-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-39-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-35-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-57-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-51-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-31-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-46-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-30-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-37-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-33-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/640-2278-0x0000000002360000-0x0000000002390000-memory.dmp

        Filesize

        192KB

      • memory/640-2279-0x00000000055A0000-0x0000000005606000-memory.dmp

        Filesize

        408KB

      • memory/640-65-0x00000000026F0000-0x00000000027CC000-memory.dmp

        Filesize

        880KB

      • memory/4724-1-0x0000000000B70000-0x0000000000FC2000-memory.dmp

        Filesize

        4.3MB

      • memory/4724-2-0x00000000058D0000-0x000000000596C000-memory.dmp

        Filesize

        624KB

      • memory/4724-0-0x00000000749DE000-0x00000000749DF000-memory.dmp

        Filesize

        4KB