Analysis

  • max time kernel
    140s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-06-2024 01:50

General

  • Target

    de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.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
  • Detects executables containing artifacts associated with disabling Widnows Defender 1 IoCs
  • Detects executables embedding command execution via IExecuteCommand COM object 1 IoCs
  • Detects executables embedding registry key / value combination indicative of disabling Windows Defender features 1 IoCs
  • Detects executables potentially checking for WinJail sandbox window 2 IoCs
  • Detects file containing reversed ASEP Autorun registry keys 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\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
    "C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.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:4192
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c timeout 1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2068
      • C:\Windows\SysWOW64\timeout.exe
        timeout 1
        3⤵
        • Delays execution with timeout.exe
        PID:4388
    • C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe
      "C:\Users\Admin\AppData\Local\Temp\de8636c5d87d276a4971eab3cbe5d3d3bb18618e8a24ae27b154e1548bd438a4.exe"
      2⤵
        PID:2984
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -u -p 4192 -s 1252
        2⤵
        • Program crash
        PID:1484
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4192 -ip 4192
      1⤵
        PID:4464

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • memory/2984-7-0x0000000000400000-0x0000000000412000-memory.dmp

        Filesize

        72KB

      • memory/2984-8-0x00000000745D0000-0x0000000074D80000-memory.dmp

        Filesize

        7.7MB

      • memory/2984-10-0x00000000745D0000-0x0000000074D80000-memory.dmp

        Filesize

        7.7MB

      • memory/2984-11-0x00000000745D0000-0x0000000074D80000-memory.dmp

        Filesize

        7.7MB

      • memory/4192-0-0x00000000745DE000-0x00000000745DF000-memory.dmp

        Filesize

        4KB

      • memory/4192-1-0x0000000000940000-0x0000000000A1C000-memory.dmp

        Filesize

        880KB

      • memory/4192-2-0x0000000005380000-0x000000000541C000-memory.dmp

        Filesize

        624KB

      • memory/4192-3-0x00000000745D0000-0x0000000074D80000-memory.dmp

        Filesize

        7.7MB

      • memory/4192-4-0x0000000005340000-0x0000000005368000-memory.dmp

        Filesize

        160KB

      • memory/4192-5-0x0000000005BA0000-0x0000000006144000-memory.dmp

        Filesize

        5.6MB

      • memory/4192-9-0x00000000745D0000-0x0000000074D80000-memory.dmp

        Filesize

        7.7MB