Analysis

  • max time kernel
    162s
  • max time network
    175s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    16-04-2024 23:06

General

  • Target

    AsyncClient.exe

  • Size

    48KB

  • MD5

    d933c68464a25181fceeaf51aff27c7d

  • SHA1

    c683186a615cc17e30a234e3a8ed666528c81998

  • SHA256

    84a10e968ebf326f31f230f19bc4aced4388e87cecb3f08b7d9cadfec3627df4

  • SHA512

    e62f70bc6437ec94bbab5b3f098b52861b7b7e4eaaafd4d82abb77df6e9c1307a771ee5a1fbdb3ca0afafd22a1cd5cee5b3cfaedc10f00af5b0715bf544c44aa

  • SSDEEP

    768:quwhFTAY3IQWUe9jqmo2qLfRyqD+4ZEzZPISu+Spy0b91pDlsISFnqBUVd/QYt0S:quwhFTA4/2YrhEWr+CNb9nOIyqBUVdI2

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

report-dust.gl.at.ply.gg:28329

Mutex

9VMpESMh922h

Attributes
  • delay

    3

  • install

    true

  • install_file

    Svchost.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Loads dropped DLL 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 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe
    "C:\Users\Admin\AppData\Local\Temp\AsyncClient.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2100
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Svchost" /tr '"C:\Users\Admin\AppData\Roaming\Svchost.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2912
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Svchost" /tr '"C:\Users\Admin\AppData\Roaming\Svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2696
    • C:\Windows\SysWOW64\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmpA506.tmp.bat""
      2⤵
      • Loads dropped DLL
      • Suspicious use of WriteProcessMemory
      PID:2552
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2576
      • C:\Users\Admin\AppData\Roaming\Svchost.exe
        "C:\Users\Admin\AppData\Roaming\Svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:2620

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpA506.tmp.bat

    Filesize

    151B

    MD5

    379882b5c10e39492e34a1880f7e8e2c

    SHA1

    eb5d3bf30d3ec84f0bf94dd4e33f09efc12b8143

    SHA256

    eaa823732b6fca85ebf03fa114609bae3e602184cceb6628b3e575447e135bfb

    SHA512

    570e3c8a108b02589e30ae0fb4df493792890c9c90720f7d2dc7cc2587e22ac3fbec88396c96ffeef78eab3c2ea763870fd01f8738f026fbb3627fa3b26fecfa

  • \Users\Admin\AppData\Roaming\Svchost.exe

    Filesize

    48KB

    MD5

    d933c68464a25181fceeaf51aff27c7d

    SHA1

    c683186a615cc17e30a234e3a8ed666528c81998

    SHA256

    84a10e968ebf326f31f230f19bc4aced4388e87cecb3f08b7d9cadfec3627df4

    SHA512

    e62f70bc6437ec94bbab5b3f098b52861b7b7e4eaaafd4d82abb77df6e9c1307a771ee5a1fbdb3ca0afafd22a1cd5cee5b3cfaedc10f00af5b0715bf544c44aa

  • memory/2100-0-0x00000000003B0000-0x00000000003C2000-memory.dmp

    Filesize

    72KB

  • memory/2100-1-0x0000000074250000-0x000000007493E000-memory.dmp

    Filesize

    6.9MB

  • memory/2100-2-0x0000000004D70000-0x0000000004DB0000-memory.dmp

    Filesize

    256KB

  • memory/2100-11-0x0000000074250000-0x000000007493E000-memory.dmp

    Filesize

    6.9MB

  • memory/2620-16-0x0000000000E30000-0x0000000000E42000-memory.dmp

    Filesize

    72KB

  • memory/2620-17-0x0000000074150000-0x000000007483E000-memory.dmp

    Filesize

    6.9MB

  • memory/2620-18-0x0000000000520000-0x0000000000560000-memory.dmp

    Filesize

    256KB

  • memory/2620-19-0x0000000074150000-0x000000007483E000-memory.dmp

    Filesize

    6.9MB

  • memory/2620-20-0x0000000000520000-0x0000000000560000-memory.dmp

    Filesize

    256KB