Analysis

  • max time kernel
    210s
  • max time network
    209s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    27/04/2023, 03:48

General

  • Target

    AsyncClient.exe

  • Size

    47KB

  • MD5

    05db410247a5899d2784c9d79a7e9f7a

  • SHA1

    9be286a04858d149eee48e4cb4f3e73ea5c5c2b8

  • SHA256

    211b91753a7aa02a6ab3a2fafdd350c4c82870b8982fdecfe4f18ef0fcfa277b

  • SHA512

    730325ce9cb5553c9e208ab34db04efde78c38ddea36a6d13bd47fb54fd0bc973d51604b0c03e83464c4f6dbb301d90cca835a98d457e2e5d56cf8ef65d0254d

  • SSDEEP

    768:eu/6ZTgoiziWUUM9rmo2qrAcazlaQPIX1XVrbOi0bGf9omSH8M6AaQLczGdBDZgx:eu/6ZTgle2W9XFRUbGfe3laQLcazdgx

Score
10/10

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#.

  • Async RAT payload 7 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1712
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c start /b powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\uduuix.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1948
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        powershell –ExecutionPolicy Bypass Start-Process -FilePath '"C:\Users\Admin\AppData\Local\Temp\uduuix.exe"'
        3⤵
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:1048
        • C:\Users\Admin\AppData\Local\Temp\uduuix.exe
          "C:\Users\Admin\AppData\Local\Temp\uduuix.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:1140
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp34A1.tmp.bat""
      2⤵
      • Deletes itself
      • Suspicious use of WriteProcessMemory
      PID:1588
      • C:\Windows\SysWOW64\timeout.exe
        timeout 2
        3⤵
        • Delays execution with timeout.exe
        PID:1576

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

          Filesize

          62KB

          MD5

          3ac860860707baaf32469fa7cc7c0192

          SHA1

          c33c2acdaba0e6fa41fd2f00f186804722477639

          SHA256

          d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

          SHA512

          d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\Content\94308059B57B3142E455B38A6EB92015

          Filesize

          62KB

          MD5

          3ac860860707baaf32469fa7cc7c0192

          SHA1

          c33c2acdaba0e6fa41fd2f00f186804722477639

          SHA256

          d015145d551ecd14916270efad773bbc9fd57fad2228d2c24559f696c961d904

          SHA512

          d62ad2408c969a95550fb87efda50f988770ba5e39972041bf85924275baf156b8bec309ecc6409e5acdd37ec175dea40eff921ab58933b5b5b5d35a6147567c

        • C:\Users\Admin\AppData\LocalLow\Microsoft\CryptnetUrlCache\MetaData\94308059B57B3142E455B38A6EB92015

          Filesize

          344B

          MD5

          96ccfeedbda213a9d981806ab489e9d2

          SHA1

          1fa29939c3b7fb1deeeaadfe56170749949fcb94

          SHA256

          972de393719468582b0a4ac16447741535714979dd79ad0da63641fc82bb84a7

          SHA512

          6ef6cc915fec84a78afb9841d660b729de9ccfc21fd5105dc9ecfac70d47d17b94826fed422eec3900fc9a4f7729d785e7a3e7080f23e8a1c1a8864feef301ba

        • C:\Users\Admin\AppData\Local\Temp\Tar3387.tmp

          Filesize

          164KB

          MD5

          4ff65ad929cd9a367680e0e5b1c08166

          SHA1

          c0af0d4396bd1f15c45f39d3b849ba444233b3a2

          SHA256

          c8733c93cc5aaf5ca206d06af22ee8dbdec764fb5085019a6a9181feb9dfdee6

          SHA512

          f530dc0d024a5a3b8903ffaaa41b608a5ccdd6da4ba1949f2c2e55a9fca475fec5c8d2119b5763cabe7ef1c3788fb9dcac621869db51d65b1d83cfe404fb4c27

        • C:\Users\Admin\AppData\Local\Temp\tmp34A1.tmp.bat

          Filesize

          163B

          MD5

          c700ad717c1362e59b93d823632762ba

          SHA1

          493a92b9f1f9c7109af56ca9af4aa6ea6298ecdc

          SHA256

          7d0db28fef33082a9b8f60fe5c1d699e119eafca248519402514aba20670d4db

          SHA512

          9c0415ba39c424778dd278c88e3a309761b64b7b740f85b268b6a2746c904b2234a403c002a04bec9592733d4c00cf419c288fec7c23136d52cec7e8f3181748

        • C:\Users\Admin\AppData\Local\Temp\tmp34A1.tmp.bat

          Filesize

          163B

          MD5

          c700ad717c1362e59b93d823632762ba

          SHA1

          493a92b9f1f9c7109af56ca9af4aa6ea6298ecdc

          SHA256

          7d0db28fef33082a9b8f60fe5c1d699e119eafca248519402514aba20670d4db

          SHA512

          9c0415ba39c424778dd278c88e3a309761b64b7b740f85b268b6a2746c904b2234a403c002a04bec9592733d4c00cf419c288fec7c23136d52cec7e8f3181748

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

          Filesize

          47KB

          MD5

          05db410247a5899d2784c9d79a7e9f7a

          SHA1

          9be286a04858d149eee48e4cb4f3e73ea5c5c2b8

          SHA256

          211b91753a7aa02a6ab3a2fafdd350c4c82870b8982fdecfe4f18ef0fcfa277b

          SHA512

          730325ce9cb5553c9e208ab34db04efde78c38ddea36a6d13bd47fb54fd0bc973d51604b0c03e83464c4f6dbb301d90cca835a98d457e2e5d56cf8ef65d0254d

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

          Filesize

          47KB

          MD5

          05db410247a5899d2784c9d79a7e9f7a

          SHA1

          9be286a04858d149eee48e4cb4f3e73ea5c5c2b8

          SHA256

          211b91753a7aa02a6ab3a2fafdd350c4c82870b8982fdecfe4f18ef0fcfa277b

          SHA512

          730325ce9cb5553c9e208ab34db04efde78c38ddea36a6d13bd47fb54fd0bc973d51604b0c03e83464c4f6dbb301d90cca835a98d457e2e5d56cf8ef65d0254d

        • \Users\Admin\AppData\Local\Temp\uduuix.exe

          Filesize

          47KB

          MD5

          05db410247a5899d2784c9d79a7e9f7a

          SHA1

          9be286a04858d149eee48e4cb4f3e73ea5c5c2b8

          SHA256

          211b91753a7aa02a6ab3a2fafdd350c4c82870b8982fdecfe4f18ef0fcfa277b

          SHA512

          730325ce9cb5553c9e208ab34db04efde78c38ddea36a6d13bd47fb54fd0bc973d51604b0c03e83464c4f6dbb301d90cca835a98d457e2e5d56cf8ef65d0254d

        • memory/1140-108-0x0000000000A30000-0x0000000000A42000-memory.dmp

          Filesize

          72KB

        • memory/1140-128-0x0000000001FE0000-0x0000000002026000-memory.dmp

          Filesize

          280KB

        • memory/1712-54-0x0000000000970000-0x0000000000982000-memory.dmp

          Filesize

          72KB

        • memory/1712-73-0x0000000000990000-0x00000000009B2000-memory.dmp

          Filesize

          136KB

        • memory/1712-55-0x0000000004DD0000-0x0000000004E10000-memory.dmp

          Filesize

          256KB