Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/03/2023, 19:11

General

  • Target

    chromedrivers.exe

  • Size

    47KB

  • MD5

    19bad7e44cebbc89e4fdbf0331f8537e

  • SHA1

    3a0d1a2c7b6c282a41be338e2487a76a80b0af30

  • SHA256

    96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70

  • SHA512

    4628e07bf34d097d646b320e2b3336e46f6ae38750e9187560e85e9db66f157d3d2de3421ee75013fbe9075dc600c9f599611cd46a4ace2c234bb5d5a948bc33

  • SSDEEP

    768:iuW81Towx/9WU9Vt+Xmo2qzEZQJSVHDEzPII72IxqKm2L0bt7GCv5wFdjhjwJ55S:iuW81Toq7C2ruRcE2Ixwzbt7Gkqjhjw0

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

dnsontopnegros.ddns.net:13370

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    chromedrivers.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

    AsyncRAT is designed to remotely monitor and control other computers written in C#.

  • Async RAT payload 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
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\chromedrivers.exe
    "C:\Users\Admin\AppData\Local\Temp\chromedrivers.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4152
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "chromedrivers" /tr '"C:\Users\Admin\AppData\Roaming\chromedrivers.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3728
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "chromedrivers" /tr '"C:\Users\Admin\AppData\Roaming\chromedrivers.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4288
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp85AF.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2824
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1404
      • C:\Users\Admin\AppData\Roaming\chromedrivers.exe
        "C:\Users\Admin\AppData\Roaming\chromedrivers.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:448

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\chromedrivers.exe.log

          Filesize

          614B

          MD5

          54920f388010333559bdff225040761d

          SHA1

          040972bf1fc83014f10c45832322c094f883ce30

          SHA256

          9ed5449a36700939987209c7a2974b9cc669b8b22c7c4e7936f35dda0a4dc359

          SHA512

          e17aa5d1328b3bfd3754d15b3c2eded98653d90c7b326f941522e0b3bd6f557880246a6bc69047facb42eb97d2e0ed6c46148dfe95a98669fc4e1d07c21a285c

        • C:\Users\Admin\AppData\Local\Temp\tmp85AF.tmp.bat

          Filesize

          157B

          MD5

          fbf522cebe307ca884955233ef44cb26

          SHA1

          57cd5e1900d38ab821c27d486a55bc8a1046746a

          SHA256

          4330ef69312a04311158c6b55c262dde4e4fbdc919725288142a621c4074b16b

          SHA512

          6f904f25d19e59f76c9470e98507061d6fee7fcac1643944e15a096bc8abc3c0a577c550414b860b00c7cc76e3aed3fe528e61518ba30fa5e9c68dbcdcb2685d

        • C:\Users\Admin\AppData\Roaming\chromedrivers.exe

          Filesize

          47KB

          MD5

          19bad7e44cebbc89e4fdbf0331f8537e

          SHA1

          3a0d1a2c7b6c282a41be338e2487a76a80b0af30

          SHA256

          96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70

          SHA512

          4628e07bf34d097d646b320e2b3336e46f6ae38750e9187560e85e9db66f157d3d2de3421ee75013fbe9075dc600c9f599611cd46a4ace2c234bb5d5a948bc33

        • C:\Users\Admin\AppData\Roaming\chromedrivers.exe

          Filesize

          47KB

          MD5

          19bad7e44cebbc89e4fdbf0331f8537e

          SHA1

          3a0d1a2c7b6c282a41be338e2487a76a80b0af30

          SHA256

          96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70

          SHA512

          4628e07bf34d097d646b320e2b3336e46f6ae38750e9187560e85e9db66f157d3d2de3421ee75013fbe9075dc600c9f599611cd46a4ace2c234bb5d5a948bc33

        • memory/448-146-0x0000000005810000-0x0000000005820000-memory.dmp

          Filesize

          64KB

        • memory/448-147-0x0000000005810000-0x0000000005820000-memory.dmp

          Filesize

          64KB

        • memory/4152-133-0x0000000000330000-0x0000000000342000-memory.dmp

          Filesize

          72KB

        • memory/4152-134-0x0000000004CF0000-0x0000000004D00000-memory.dmp

          Filesize

          64KB

        • memory/4152-135-0x0000000004D80000-0x0000000004DE6000-memory.dmp

          Filesize

          408KB

        • memory/4152-136-0x0000000005210000-0x00000000052AC000-memory.dmp

          Filesize

          624KB