Analysis

  • max time kernel
    143s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-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 6 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). 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\chromedrivers.exe
    "C:\Users\Admin\AppData\Local\Temp\chromedrivers.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:748
    • 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:1472
      • 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:904
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp79B3.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:240
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:828
      • C:\Users\Admin\AppData\Roaming\chromedrivers.exe
        "C:\Users\Admin\AppData\Roaming\chromedrivers.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1744

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp79B3.tmp.bat

          Filesize

          157B

          MD5

          e824357297c384af801f8f4d5999903d

          SHA1

          16cd8c14fe978d00c9d8e8b92119a4fc0363bc6f

          SHA256

          f4e46a26a9f82ac85a5ae2472a4b804d70af9265a6e3ad94b7628762eddd2201

          SHA512

          fa170057f1f2cd1938c6515cdb3a1dcca59c7df7fcf61052add6ad6522560f71c7cd16c8fee957021a4273b64f3d60695b44c93ceb6ac3f2ff908d48b19abc5c

        • C:\Users\Admin\AppData\Local\Temp\tmp79B3.tmp.bat

          Filesize

          157B

          MD5

          e824357297c384af801f8f4d5999903d

          SHA1

          16cd8c14fe978d00c9d8e8b92119a4fc0363bc6f

          SHA256

          f4e46a26a9f82ac85a5ae2472a4b804d70af9265a6e3ad94b7628762eddd2201

          SHA512

          fa170057f1f2cd1938c6515cdb3a1dcca59c7df7fcf61052add6ad6522560f71c7cd16c8fee957021a4273b64f3d60695b44c93ceb6ac3f2ff908d48b19abc5c

        • 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

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

          Filesize

          47KB

          MD5

          19bad7e44cebbc89e4fdbf0331f8537e

          SHA1

          3a0d1a2c7b6c282a41be338e2487a76a80b0af30

          SHA256

          96b2d78904d08e5deeb0aa2b82e1630e7d190e85cddb807a539b1b4c8126ba70

          SHA512

          4628e07bf34d097d646b320e2b3336e46f6ae38750e9187560e85e9db66f157d3d2de3421ee75013fbe9075dc600c9f599611cd46a4ace2c234bb5d5a948bc33

        • memory/748-54-0x0000000001080000-0x0000000001092000-memory.dmp

          Filesize

          72KB

        • memory/748-55-0x0000000004D80000-0x0000000004DC0000-memory.dmp

          Filesize

          256KB

        • memory/1744-68-0x0000000000D00000-0x0000000000D12000-memory.dmp

          Filesize

          72KB

        • memory/1744-69-0x0000000004D10000-0x0000000004D50000-memory.dmp

          Filesize

          256KB

        • memory/1744-70-0x0000000004D10000-0x0000000004D50000-memory.dmp

          Filesize

          256KB