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, 19:32

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:2148
    • 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:3096
      • 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:1168
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5A55.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4168
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4248
      • 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:4148

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp5A55.tmp.bat

          Filesize

          159B

          MD5

          e4152776a243b5dcbabdc9c30ef6a145

          SHA1

          9e8532a01ac3a18c0790d7f31880ee8096fc6c22

          SHA256

          7f0a9b833e6291747e7599a598def4b5336c34bd2e3e5aa8b2bb893531253ced

          SHA512

          3de0cd9c8b02fc70cb5ba77e50875978b08c99a6734ff38442659468b99bed4504e8b70935a0717e534922bc6c26de3fb59ecdf108b5802df1cbda1b3f9febd6

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

          Filesize

          63KB

          MD5

          e40435c6df1a16aad70fcb8582228bc3

          SHA1

          8d5a1a1213b6680cfe3cb59aa0383ae8a91d5141

          SHA256

          6148afd882ab17b41c7e5d92569d55426ef18bec0c45335529ca66c0ae19efdd

          SHA512

          f7e33a06735e0297c06d3875010bc065471ce44ff86466cdf36c7773f4c3b1e9aef96c00efbf162976f695e50f06e7729f995a63a9de6335e0dcb36e7a19da2b

        • memory/2148-0-0x0000000000050000-0x0000000000066000-memory.dmp

          Filesize

          88KB

        • memory/2148-1-0x00007FFF52780000-0x00007FFF53241000-memory.dmp

          Filesize

          10.8MB

        • memory/2148-2-0x00000000009D0000-0x00000000009E0000-memory.dmp

          Filesize

          64KB

        • memory/2148-8-0x00007FFF70730000-0x00007FFF70925000-memory.dmp

          Filesize

          2.0MB

        • memory/2148-7-0x00007FFF52780000-0x00007FFF53241000-memory.dmp

          Filesize

          10.8MB

        • memory/2148-9-0x00007FFF5DA70000-0x00007FFF5DA89000-memory.dmp

          Filesize

          100KB

        • memory/4148-14-0x00007FFF52780000-0x00007FFF53241000-memory.dmp

          Filesize

          10.8MB

        • memory/4148-15-0x0000000002B50000-0x0000000002B60000-memory.dmp

          Filesize

          64KB

        • memory/4148-16-0x00007FFF52780000-0x00007FFF53241000-memory.dmp

          Filesize

          10.8MB

        • memory/4148-17-0x0000000002B50000-0x0000000002B60000-memory.dmp

          Filesize

          64KB