Analysis

  • max time kernel
    141s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    20-12-2024 17:24

General

  • Target

    AsyncClient.exe

  • Size

    45KB

  • MD5

    b77efa9b19b5b1b63264632c6b9dc749

  • SHA1

    b31eb2953de482cdcced69283032fbc8ca6b1042

  • SHA256

    af864a8fd8576810fdf0171c9983280536199bafc68cc37a5d532ceff71fff88

  • SHA512

    2d602f3a99131a9d691b952416de0c0e098a2f680deb425034458db26240d32d9e98ac6e636ab1ac15f51f37dc6551197aacd4171e623dcd4fa676ae971cd84c

  • SSDEEP

    768:+uynFTMIGZ8btAWUu7y6mo2q8YKjPGaG6PIyzjbFgX3iQjEZsTNt77R1CtBDZqx:+uynFTMtkf2MKTkDy3bCXSQ/3dCdqx

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

192.168.0.174:8808

Mutex

bsOjaqZKQz62

Attributes
  • delay

    3

  • install

    true

  • install_file

    dad.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Asyncrat family
  • Async RAT payload 1 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).

  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3764
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "dad" /tr '"C:\Users\Admin\AppData\Roaming\dad.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2692
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "dad" /tr '"C:\Users\Admin\AppData\Roaming\dad.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3084
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp84A1.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3848
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:4528
      • C:\Users\Admin\AppData\Roaming\dad.exe
        "C:\Users\Admin\AppData\Roaming\dad.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:3588

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp84A1.tmp.bat

    Filesize

    147B

    MD5

    db1c545dec36b091ac71d8c31bca5c5c

    SHA1

    bf90543fd002dcf86fe00e9de3d561c800caa22c

    SHA256

    e272c6f62395b107bd4e12f9167f55d2466b5747eeadcbf5380a3cef3a5be8f2

    SHA512

    e57ba25988045224389dc5501f393236a473adcb9f9ac9574e0c63c66e7b141372c81dcff7c4c38a6f57e97584ab3262312abe09b0271244e25cfa339fe2e601

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

    Filesize

    45KB

    MD5

    b77efa9b19b5b1b63264632c6b9dc749

    SHA1

    b31eb2953de482cdcced69283032fbc8ca6b1042

    SHA256

    af864a8fd8576810fdf0171c9983280536199bafc68cc37a5d532ceff71fff88

    SHA512

    2d602f3a99131a9d691b952416de0c0e098a2f680deb425034458db26240d32d9e98ac6e636ab1ac15f51f37dc6551197aacd4171e623dcd4fa676ae971cd84c

  • memory/3588-13-0x0000000074F90000-0x0000000075740000-memory.dmp

    Filesize

    7.7MB

  • memory/3588-14-0x0000000074F90000-0x0000000075740000-memory.dmp

    Filesize

    7.7MB

  • memory/3764-0-0x000000007501E000-0x000000007501F000-memory.dmp

    Filesize

    4KB

  • memory/3764-1-0x0000000000500000-0x0000000000512000-memory.dmp

    Filesize

    72KB

  • memory/3764-2-0x0000000075010000-0x00000000757C0000-memory.dmp

    Filesize

    7.7MB

  • memory/3764-3-0x0000000004EF0000-0x0000000004F8C000-memory.dmp

    Filesize

    624KB

  • memory/3764-9-0x0000000075010000-0x00000000757C0000-memory.dmp

    Filesize

    7.7MB