Analysis

  • max time kernel
    143s
  • max time network
    177s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    01/05/2023, 20:10

General

  • Target

    Servjjjer.exe

  • Size

    175KB

  • MD5

    5b3cfe226cbf4629f1bf59d9a8b644cb

  • SHA1

    709f112da624e832c9e257ffe68f7ad2cc08bb6f

  • SHA256

    6894c104c50fea8b20c9d459919854463fa2aad13165bb0650deb946fb3b7de7

  • SHA512

    485962e678cc88aecbf1f9028d55885f6290bf6ff33555b231938a1ae323ec06311963988fbae15466dc39249e3fadfe7e108e0d24ef54bc3fd858572d1384e9

  • SSDEEP

    3072:Qe8oX8Sb5KcXrtkkXmf/bDsvqtU+lLToChAP0UZ0b2gTLcwAqE+Wpor:pXtb5KcXr7XmfgqtjhAxZ0b2ko

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/bot5890094946:AAEYglD59tTB66C18AiuzpbBGVoAYux1-gc/sendMessage?chat_id=5969887379

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
  • 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) 6 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Looks up geolocation information via web service

    Uses a legitimate geolocation service to find the infected system's geolocation info.

  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 28 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Servjjjer.exe
    "C:\Users\Admin\AppData\Local\Temp\Servjjjer.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2032
    • C:\Windows\SysWOW64\cmd.exe
      "cmd.exe" /C chcp 65001 && netsh wlan show profile | findstr All
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1216
      • C:\Windows\SysWOW64\chcp.com
        chcp 65001
        3⤵
          PID:976
        • C:\Windows\SysWOW64\findstr.exe
          findstr All
          3⤵
            PID:1552
          • C:\Windows\SysWOW64\netsh.exe
            netsh wlan show profile
            3⤵
              PID:1688
          • C:\Windows\SysWOW64\cmd.exe
            "cmd.exe" /C chcp 65001 && netsh wlan show networks mode=bssid
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1360
            • C:\Windows\SysWOW64\chcp.com
              chcp 65001
              3⤵
                PID:1388
              • C:\Windows\SysWOW64\netsh.exe
                netsh wlan show networks mode=bssid
                3⤵
                  PID:1756

            Network

                  MITRE ATT&CK Enterprise v6

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • memory/2032-54-0x0000000000ED0000-0x0000000000F02000-memory.dmp

                    Filesize

                    200KB

                  • memory/2032-55-0x0000000004B80000-0x0000000004BC0000-memory.dmp

                    Filesize

                    256KB

                  • memory/2032-56-0x0000000004B80000-0x0000000004BC0000-memory.dmp

                    Filesize

                    256KB

                  • memory/2032-124-0x0000000004B80000-0x0000000004BC0000-memory.dmp

                    Filesize

                    256KB

                  • memory/2032-128-0x0000000004B80000-0x0000000004BC0000-memory.dmp

                    Filesize

                    256KB