Analysis

  • max time kernel
    135s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/04/2023, 03:34

General

  • Target

    AsyncClient.exe

  • Size

    45KB

  • MD5

    3e22b4881d403e06a2790b6eed7be6e2

  • SHA1

    0253bbed2fd792ddceb33c81196e24283ce9a492

  • SHA256

    e4754f6bf9dab9b5c124d1d1b1238ddbfa1383e593f686f55a9eb747d44a938f

  • SHA512

    543f2eebc95f052512766dda20f9f84866214412f7e03bff33ac3168996f351c6d856f71cd53b4f9d4c71ed2e99f6b7ae55f858c3e91e8ca635b0a3b977df3fa

  • SSDEEP

    768:Hu/6ZTgoiziWUUM9rmo2qrrKjGKG6PIyzjbFgX3i1WTulwrU19R4p5BDZjx:Hu/6ZTgle2mKYDy3bCXScTuln19R4pdd

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

127.0.0.1:61288

146.70.165.10:61288

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#.

  • Modifies Windows Defender Real-time Protection settings 3 TTPs 4 IoCs
  • Async RAT payload 1 IoCs
  • Windows security modification 2 TTPs 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Modifies Windows Defender Real-time Protection settings
    • Windows security modification
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1760
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell" Get-MpPreference -verbose
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:5080

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mdsr1ged.dpc.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • memory/1760-134-0x0000000005430000-0x0000000005440000-memory.dmp

          Filesize

          64KB

        • memory/1760-135-0x0000000005430000-0x0000000005440000-memory.dmp

          Filesize

          64KB

        • memory/1760-136-0x0000000005960000-0x00000000059FC000-memory.dmp

          Filesize

          624KB

        • memory/1760-137-0x0000000005FB0000-0x0000000006554000-memory.dmp

          Filesize

          5.6MB

        • memory/1760-138-0x0000000005A70000-0x0000000005AD6000-memory.dmp

          Filesize

          408KB

        • memory/1760-139-0x0000000006BE0000-0x0000000006C56000-memory.dmp

          Filesize

          472KB

        • memory/1760-140-0x0000000006BB0000-0x0000000006BCE000-memory.dmp

          Filesize

          120KB

        • memory/1760-141-0x0000000006D30000-0x0000000006DC2000-memory.dmp

          Filesize

          584KB

        • memory/1760-133-0x0000000000A40000-0x0000000000A52000-memory.dmp

          Filesize

          72KB

        • memory/5080-155-0x0000000002B90000-0x0000000002BA0000-memory.dmp

          Filesize

          64KB

        • memory/5080-160-0x00000000069E0000-0x0000000006A12000-memory.dmp

          Filesize

          200KB

        • memory/5080-143-0x0000000005520000-0x0000000005B48000-memory.dmp

          Filesize

          6.2MB

        • memory/5080-150-0x0000000005D40000-0x0000000005DA6000-memory.dmp

          Filesize

          408KB

        • memory/5080-142-0x0000000002AF0000-0x0000000002B26000-memory.dmp

          Filesize

          216KB

        • memory/5080-156-0x0000000002B90000-0x0000000002BA0000-memory.dmp

          Filesize

          64KB

        • memory/5080-157-0x0000000006420000-0x000000000643E000-memory.dmp

          Filesize

          120KB

        • memory/5080-158-0x0000000002B90000-0x0000000002BA0000-memory.dmp

          Filesize

          64KB

        • memory/5080-159-0x000000007F590000-0x000000007F5A0000-memory.dmp

          Filesize

          64KB

        • memory/5080-144-0x0000000005CA0000-0x0000000005CC2000-memory.dmp

          Filesize

          136KB

        • memory/5080-161-0x0000000070150000-0x000000007019C000-memory.dmp

          Filesize

          304KB

        • memory/5080-171-0x00000000069C0000-0x00000000069DE000-memory.dmp

          Filesize

          120KB

        • memory/5080-172-0x0000000007D70000-0x00000000083EA000-memory.dmp

          Filesize

          6.5MB

        • memory/5080-173-0x0000000007720000-0x000000000773A000-memory.dmp

          Filesize

          104KB

        • memory/5080-174-0x0000000007790000-0x000000000779A000-memory.dmp

          Filesize

          40KB

        • memory/5080-175-0x00000000079A0000-0x0000000007A36000-memory.dmp

          Filesize

          600KB

        • memory/5080-176-0x0000000007960000-0x000000000796E000-memory.dmp

          Filesize

          56KB

        • memory/5080-177-0x0000000007A60000-0x0000000007A7A000-memory.dmp

          Filesize

          104KB

        • memory/5080-178-0x0000000007A50000-0x0000000007A58000-memory.dmp

          Filesize

          32KB