Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22/01/2024, 19:31

General

  • Target

    UniAccChecker.exe

  • Size

    63KB

  • MD5

    e40435c6df1a16aad70fcb8582228bc3

  • SHA1

    8d5a1a1213b6680cfe3cb59aa0383ae8a91d5141

  • SHA256

    6148afd882ab17b41c7e5d92569d55426ef18bec0c45335529ca66c0ae19efdd

  • SHA512

    f7e33a06735e0297c06d3875010bc065471ce44ff86466cdf36c7773f4c3b1e9aef96c00efbf162976f695e50f06e7729f995a63a9de6335e0dcb36e7a19da2b

  • SSDEEP

    1536:UJ/t/dSJYUbdh9IM1b+uFg6CinpqKmY7:U3/YYUbd3Zg6Ci0z

Score
10/10

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:3232

Mutex

吾吾owlΒiH1XNبmש吉E迪yاqCX

Attributes
  • delay

    1

  • install

    true

  • install_file

    GoogleChromeUpd.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).

  • 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 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\UniAccChecker.exe
    "C:\Users\Admin\AppData\Local\Temp\UniAccChecker.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2876
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "GoogleChromeUpd" /tr '"C:\Users\Admin\AppData\Roaming\GoogleChromeUpd.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1568
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "GoogleChromeUpd" /tr '"C:\Users\Admin\AppData\Roaming\GoogleChromeUpd.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1464
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp73F7.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1908
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1188
      • C:\Users\Admin\AppData\Roaming\GoogleChromeUpd.exe
        "C:\Users\Admin\AppData\Roaming\GoogleChromeUpd.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3704

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp73F7.tmp.bat

          Filesize

          159B

          MD5

          376c91afa636a6996adf4a80085dabfa

          SHA1

          241892093c72e04faed83a30c7f3a32deb851762

          SHA256

          7add53f8fa1a12b78c77da14970697b5b890f343d8947300eaa32d405ec660cc

          SHA512

          fdc3aa72cc4fd3aae50c74337bc1705a59e155b339ffc5d20dc271bdfa37b1187592eef8f82a34878d82f23fc4b9b99abecfded5e574c8fa5b63e2f913ba81cb

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

          Filesize

          63KB

          MD5

          e40435c6df1a16aad70fcb8582228bc3

          SHA1

          8d5a1a1213b6680cfe3cb59aa0383ae8a91d5141

          SHA256

          6148afd882ab17b41c7e5d92569d55426ef18bec0c45335529ca66c0ae19efdd

          SHA512

          f7e33a06735e0297c06d3875010bc065471ce44ff86466cdf36c7773f4c3b1e9aef96c00efbf162976f695e50f06e7729f995a63a9de6335e0dcb36e7a19da2b

        • memory/2876-10-0x00007FFB70250000-0x00007FFB70445000-memory.dmp

          Filesize

          2.0MB

        • memory/2876-7-0x00007FFB70250000-0x00007FFB70445000-memory.dmp

          Filesize

          2.0MB

        • memory/2876-8-0x00007FFB5CE60000-0x00007FFB5CE79000-memory.dmp

          Filesize

          100KB

        • memory/2876-9-0x00007FFB516C0000-0x00007FFB52181000-memory.dmp

          Filesize

          10.8MB

        • memory/2876-0-0x0000000000170000-0x0000000000186000-memory.dmp

          Filesize

          88KB

        • memory/2876-2-0x000000001AF10000-0x000000001AF20000-memory.dmp

          Filesize

          64KB

        • memory/2876-1-0x00007FFB516C0000-0x00007FFB52181000-memory.dmp

          Filesize

          10.8MB

        • memory/3704-15-0x00007FFB51370000-0x00007FFB51E31000-memory.dmp

          Filesize

          10.8MB

        • memory/3704-16-0x0000000002A00000-0x0000000002A10000-memory.dmp

          Filesize

          64KB

        • memory/3704-17-0x00007FFB51370000-0x00007FFB51E31000-memory.dmp

          Filesize

          10.8MB

        • memory/3704-18-0x0000000002A00000-0x0000000002A10000-memory.dmp

          Filesize

          64KB