Overview

overview

10

Static

static

4075e5cedf...cc.exe

windows7_x64

10

4075e5cedf...cc.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    129s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    24/06/2020, 14:56

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General

  • Target
    4075e5cedf262f587538979cd6d62ff4b0fc5bdf7f9a4b770ae9e297ea7c9fcc.exe
  • Size 1.5MB
  • Sample200624-wll9tk2b7e
  • SHA256 4075e5cedf262f587538979cd6d62ff4b0fc5bdf7f9a4b770ae9e297ea7c9fcc
  • MD5 SHA1 SHA512
Score
10/10
asyncratevasionratspywareupx

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.6D

C2

  • null:null

Mutex

  • Riddle1337

Attributes
  • aes_key

    BdWDJiqMP2ZNyzBwdN5Z7ICTpIT4KsaW

  • anti_detection

    false

  • autorun

    false

  • bdos

    false

  • delay

    BoT

  • host

    null

  • hwid

    1

  • install_file

  • install_folder

    %AppData%

  • mutex

    Riddle1337

  • pastebin_config

    https://pastebin.com/raw/bxXpigGK

  • port

    null

  • version

    0.5.6D

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers.

    ratasyncrat
  • Modifies visibility of file extensions in Explorer 2 TTPs
    evasion
  • Async RAT payload 3 IoCs
    rat
  • Executes dropped EXE 4 IoCs
  • UPX packed file 6 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Drops startup file 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

    spyware
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of SetThreadContext 2 IoCs
  • Program crash 2 IoCs
  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 1631 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of WriteProcessMemory 26 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\4075e5cedf262f587538979cd6d62ff4b0fc5bdf7f9a4b770ae9e297ea7c9fcc.exe
    "C:\Users\Admin\AppData\Local\Temp\4075e5cedf262f587538979cd6d62ff4b0fc5bdf7f9a4b770ae9e297ea7c9fcc.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:3820
    • C:\Users\Admin\AppData\Local\Temp\MDQ5OT2WiMlrpUfcDe.exe
      "C:\Users\Admin\AppData\Local\Temp\MDQ5OT2WiMlrpUfcDe.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of WriteProcessMemory
      PID:2964
      • C:\Windows\SysWOW64\notepad.exe
        "C:\Windows\system32\notepad.exe"
        3⤵
        • Drops startup file
        • NTFS ADS
        • Suspicious use of WriteProcessMemory
        PID:3680
        • C:\Users\Admin\AppData\Roaming\Runtime Broker\Runtime Broker.exe
          "C:\Users\Admin\AppData\Roaming\Runtime Broker\Runtime Broker.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of WriteProcessMemory
          PID:3796
          • C:\Users\Admin\AppData\Roaming\Runtime Broker\Runtime Broker.exe
            "C:\Users\Admin\AppData\Roaming\Runtime Broker\Runtime Broker.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:1220
            • C:\Windows\SysWOW64\cmd.exe
              "C:\Windows\System32\cmd.exe" /c start /b powershell Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\tmp643E.tmpg r.exe"' & exit
              6⤵
              • Suspicious use of WriteProcessMemory
              PID:2632
              • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
                powershell Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\tmp643E.tmpg r.exe"'
                7⤵
                  PID:3680
                  • C:\Windows\SysWOW64\WerFault.exe
                    C:\Windows\SysWOW64\WerFault.exe -u -p 3680 -s 704
                    8⤵
                    • Program crash
                    • Suspicious use of AdjustPrivilegeToken
                    PID:2040
            • C:\Users\Admin\AppData\Roaming\Runtime Broker\Runtime Broker.exe
              "C:\Users\Admin\AppData\Roaming\Runtime Broker\Runtime Broker.exe" 2 1220 112859
              5⤵
              • Executes dropped EXE
              • Suspicious behavior: EnumeratesProcesses
              PID:1272
      • C:\Users\Admin\AppData\Local\Temp\4075e5cedf262f587538979cd6d62ff4b0fc5bdf7f9a4b770ae9e297ea7c9fcc.exe
        "C:\Users\Admin\AppData\Local\Temp\4075e5cedf262f587538979cd6d62ff4b0fc5bdf7f9a4b770ae9e297ea7c9fcc.exe"
        2⤵
          PID:1936
          • C:\Windows\SysWOW64\WerFault.exe
            C:\Windows\SysWOW64\WerFault.exe -u -p 1936 -s 868
            3⤵
            • Program crash
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:748

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            memory/748-9-0x0000000004440000-0x0000000004441000-memory.dmp
            Download

            memory/748-10-0x0000000004440000-0x0000000004441000-memory.dmp
            Download

            memory/748-16-0x0000000004A70000-0x0000000004A71000-memory.dmp
            Download

            memory/1220-74-0x0000000000400000-0x0000000000432000-memory.dmp
            Download

            memory/1220-79-0x0000000000400000-0x0000000000432000-memory.dmp
            Download

            memory/1220-78-0x0000000000400000-0x0000000000432000-memory.dmp
            Download

            memory/1220-81-0x0000000000500000-0x0000000000512000-memory.dmp
            Download

            memory/1220-82-0x00000000009F2000-0x00000000009F3000-memory.dmp
            Download

            memory/1936-8-0x00000000023B2000-0x00000000023B3000-memory.dmp
            Download

            memory/1936-6-0x0000000000400000-0x0000000000492000-memory.dmp
            Download

            memory/1936-5-0x0000000000400000-0x0000000000492000-memory.dmp
            Download

            memory/1936-7-0x00000000009A0000-0x00000000009E2000-memory.dmp
            Download

            memory/1936-3-0x0000000000400000-0x0000000000492000-memory.dmp
            Download

            memory/2040-86-0x0000000004230000-0x0000000004231000-memory.dmp
            Download

            memory/2040-93-0x0000000004760000-0x0000000004761000-memory.dmp
            Download