Analysis

  • max time kernel
    135s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/04/2023, 09:09

General

  • Target

    Memory.vbs

  • Size

    2.9MB

  • MD5

    dc41ef27fd74ade70d62e7bfcbbe2de2

  • SHA1

    e8282edf1205c6cfccef3cdf41ea4303a45c5745

  • SHA256

    ad9a2790803eb17a4e3977c514c4ca98e520cb38f00f8103ee5f2cc1ed209b47

  • SHA512

    ae779c4b20616e92080ba02167b1105d73a001bbf612efadbe7b84be355918f6aa1d582e7ae45478d84d8349651db99efd36b4545a85334e5945382c90875d36

  • SSDEEP

    1536:khTJiTSxGdQkVHgnlUTCAmTzZQXEXtXX8XZXDKcZtDRRj7aqDfR/wyihW9Qk2vSj:C6uECAm0wyihW9Qk2vSk8BtaN8wRnX5W

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

95.214.24.134:1911

95.214.24.134:1912

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    5

  • 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 1 IoCs
  • Blocklisted process makes network request 3 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\Memory.vbs"
    1⤵
    • Blocklisted process makes network request
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:5040
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Roaming\WindowsServices\EHKOZ.cmd" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4132
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        PowerShell.exe -NoProfile -ExecutionPolicy Bypass -Command C:\Users\Admin\AppData\Roaming\WindowsServices\FWVCX.ps1
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:272
        • C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe
          "C:\Users\Admin\AppData\Local\Temp\RegSvcs.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious use of AdjustPrivilegeToken
          PID:3628

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

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

          Filesize

          44KB

          MD5

          9d352bc46709f0cb5ec974633a0c3c94

          SHA1

          1969771b2f022f9a86d77ac4d4d239becdf08d07

          SHA256

          2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390

          SHA512

          13c714244ec56beeb202279e4109d59c2a43c3cf29f90a374a751c04fd472b45228ca5a0178f41109ed863dbd34e0879e4a21f5e38ae3d89559c57e6be990a9b

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

          Filesize

          44KB

          MD5

          9d352bc46709f0cb5ec974633a0c3c94

          SHA1

          1969771b2f022f9a86d77ac4d4d239becdf08d07

          SHA256

          2c1eeb7097023c784c2bd040a2005a5070ed6f3a4abf13929377a9e39fab1390

          SHA512

          13c714244ec56beeb202279e4109d59c2a43c3cf29f90a374a751c04fd472b45228ca5a0178f41109ed863dbd34e0879e4a21f5e38ae3d89559c57e6be990a9b

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qsqumz4y.bvf.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\YTOSB.vbs

          Filesize

          276B

          MD5

          cf0d0c9a3f216b899b91781a093e829e

          SHA1

          606998c5c842f4d86e72819e92ef485a1f24bf2a

          SHA256

          a12cc767ab92fa1379c213ebc9a637bfbc0c316e654850789a19abc17eb65a75

          SHA512

          bd3af39529ea646026716b4d6ed343f98b989beeb0f025e90be54b55050b38744aa9c6a04b061394c3ef2abfce797b943e83ac5a8386888319c03e380f3839f5

        • C:\Users\Admin\AppData\Roaming\WindowsServices\EHKOZ.cmd

          Filesize

          75B

          MD5

          0c4f14db483f17cc1842aa6d7762fe00

          SHA1

          582e6d58bee7b124cd6b0b4d9514f73ce68d374c

          SHA256

          c3aa7a1a4b7ff07c05c5c630853c1b9ce4110481a4300a05536e501f198fb4f4

          SHA512

          d5136d78b29667cfd3a6e2c050ebf95509e7acf032a192bc7eca8510f7c3d4b1e98aea1bb34cbe2d2cd54da87ee57dd2b93c4da27bf3ea30b5b32f5fe20f2950

        • C:\Users\Admin\AppData\Roaming\WindowsServices\EHKOZ.cmd

          Filesize

          75B

          MD5

          0c4f14db483f17cc1842aa6d7762fe00

          SHA1

          582e6d58bee7b124cd6b0b4d9514f73ce68d374c

          SHA256

          c3aa7a1a4b7ff07c05c5c630853c1b9ce4110481a4300a05536e501f198fb4f4

          SHA512

          d5136d78b29667cfd3a6e2c050ebf95509e7acf032a192bc7eca8510f7c3d4b1e98aea1bb34cbe2d2cd54da87ee57dd2b93c4da27bf3ea30b5b32f5fe20f2950

        • C:\Users\Admin\AppData\Roaming\WindowsServices\FWVCX.ps1

          Filesize

          205KB

          MD5

          5136fb951b17f99d700ee1816764f255

          SHA1

          1ffa5721e100a286752da77bd203ac9d76573eec

          SHA256

          4c300f1601a8baa0a9bedf7048f960425ad7e1fe899b0ebded0f5628acdd0743

          SHA512

          29cacc82c91c194a8ca3df15aad8983d57c4bf563b9aec5b74cca0c99c8b42b49ff8ff182c42313ad7aee8d2fe3c2a6819dbcb0bef43eaaa01af53519b986566

        • memory/272-171-0x000001ABECA20000-0x000001ABECA30000-memory.dmp

          Filesize

          64KB

        • memory/272-170-0x000001ABECA20000-0x000001ABECA30000-memory.dmp

          Filesize

          64KB

        • memory/272-169-0x000001ABECA20000-0x000001ABECA30000-memory.dmp

          Filesize

          64KB

        • memory/272-167-0x000001ABED7B0000-0x000001ABED7D2000-memory.dmp

          Filesize

          136KB

        • memory/3628-174-0x0000000000400000-0x0000000000412000-memory.dmp

          Filesize

          72KB

        • memory/3628-180-0x00000000050C0000-0x00000000050D0000-memory.dmp

          Filesize

          64KB

        • memory/3628-181-0x00000000053F0000-0x000000000548C000-memory.dmp

          Filesize

          624KB

        • memory/3628-182-0x0000000005A40000-0x0000000005FE4000-memory.dmp

          Filesize

          5.6MB

        • memory/3628-183-0x0000000005500000-0x0000000005566000-memory.dmp

          Filesize

          408KB

        • memory/3628-184-0x00000000050C0000-0x00000000050D0000-memory.dmp

          Filesize

          64KB