Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28-06-2024 18:53

General

  • Target

    file.exe

  • Size

    866KB

  • MD5

    17d02350b80c3c03c0be2b1acab650d1

  • SHA1

    775181f6686d21806ba7e6fe4ae1ecdc82d0157f

  • SHA256

    de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4

  • SHA512

    e61b19867eb0aff9d43ab7f13ac73217d0bd244e8b908eb902940315d77c3df67fbde40f7d80d602d8f491065fdb98791deb5f3fd4c122ef010f09616d1aaade

  • SSDEEP

    3072:dBUyU7/NUauKvxUjUYqDbf5PBb6Tx3zU5IYUeyUwgUn1UdjgUtGU4rZ/ME+h0UIx:CQdx8nHZtwjWK3FFQgzv1x5

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

hgjvhnfgg.duckdns.org:8057

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    false

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Drops startup file 2 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 13 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3616
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3920
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:2036
    • C:\Users\Admin\AppData\Local\Temp\file.exe
      "C:\Users\Admin\AppData\Local\Temp\file.exe"
      2⤵
        PID:4504
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 3616 -s 1128
        2⤵
        • Program crash
        PID:5040
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3616 -ip 3616
      1⤵
        PID:5036

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/3616-0-0x0000000074F2E000-0x0000000074F2F000-memory.dmp

        Filesize

        4KB

      • memory/3616-1-0x00000000004E0000-0x00000000005BC000-memory.dmp

        Filesize

        880KB

      • memory/3616-2-0x0000000004F30000-0x0000000004FCC000-memory.dmp

        Filesize

        624KB

      • memory/3616-3-0x0000000074F20000-0x00000000756D0000-memory.dmp

        Filesize

        7.7MB

      • memory/3616-4-0x00000000050D0000-0x00000000050F8000-memory.dmp

        Filesize

        160KB

      • memory/3616-5-0x00000000056B0000-0x0000000005C54000-memory.dmp

        Filesize

        5.6MB

      • memory/3616-9-0x0000000074F20000-0x00000000756D0000-memory.dmp

        Filesize

        7.7MB

      • memory/4504-7-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/4504-8-0x0000000074F20000-0x00000000756D0000-memory.dmp

        Filesize

        7.7MB

      • memory/4504-10-0x0000000074F20000-0x00000000756D0000-memory.dmp

        Filesize

        7.7MB

      • memory/4504-11-0x0000000074F20000-0x00000000756D0000-memory.dmp

        Filesize

        7.7MB