Analysis

  • max time kernel
    122s
  • max time network
    134s
  • platform
    windows7_x64
  • resource
    win7-20230220-en
  • resource tags

    arch:x64arch:x86image:win7-20230220-enlocale:en-usos:windows7-x64system
  • submitted
    19/03/2023, 15:27

General

  • Target

    0x000300000002287f-434.exe

  • Size

    63KB

  • MD5

    2d7e104a199600d550879e132d877ee7

  • SHA1

    9a702148bcb48c8f666d275b0b08bf2b1711e069

  • SHA256

    4f4432ddc88c1bca9f139589c8ce1fcaf016ff167d189e6fb6231057fdf1fff7

  • SHA512

    c78a6954104da75ffb6a98447fe36f8297d27929a1eab540eed67e4ec42d35ad46fe0037bf29d7904f36433dce34a27b92556e4e376ef79c1914cc54676adc33

  • SSDEEP

    768:a3lDmSRCvHxiP7VIiz9JS8cwoLw9Qq2R1+KASmv7mqb2nFpwH1ovTGU6eLMnqGzl:acHWRbc78du1ibb2w+3bdGztpqKmY7

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

CYB3R R4T 1.0.7

Botnet

Default

C2

ii-usd.at.ply.gg:25036

Mutex

Cyb3r_R4tMutex_Cyb3rw4rrior1011

Attributes
  • delay

    1

  • install

    true

  • install_file

    syscall.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Async RAT payload 5 IoCs
  • Executes dropped EXE 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 15 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\0x000300000002287f-434.exe
    "C:\Users\Admin\AppData\Local\Temp\0x000300000002287f-434.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1236
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "syscall" /tr '"C:\Users\Admin\AppData\Roaming\syscall.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:876
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "syscall" /tr '"C:\Users\Admin\AppData\Roaming\syscall.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1156
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\tmp19D8.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:684
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1900
      • C:\Users\Admin\AppData\Roaming\syscall.exe
        "C:\Users\Admin\AppData\Roaming\syscall.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1280

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp19D8.tmp.bat

          Filesize

          151B

          MD5

          ca0b9c176f48414491de060a94c604a6

          SHA1

          8c7e229f28d3694db2cb311b25edc15fc0e81dab

          SHA256

          46f72042397ac4749b3143ac1f648d1f9d7088f5bae9655f2e46d3f9cae62cea

          SHA512

          18ffdd92fbfdc622278e4c3e34feee7a526d3605bb5378620d65d4ce9eb07ee9c78584da27f573e2093415c63cd9796e287795c3ce7e2c946b0890008952e12f

        • C:\Users\Admin\AppData\Local\Temp\tmp19D8.tmp.bat

          Filesize

          151B

          MD5

          ca0b9c176f48414491de060a94c604a6

          SHA1

          8c7e229f28d3694db2cb311b25edc15fc0e81dab

          SHA256

          46f72042397ac4749b3143ac1f648d1f9d7088f5bae9655f2e46d3f9cae62cea

          SHA512

          18ffdd92fbfdc622278e4c3e34feee7a526d3605bb5378620d65d4ce9eb07ee9c78584da27f573e2093415c63cd9796e287795c3ce7e2c946b0890008952e12f

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

          Filesize

          63KB

          MD5

          2d7e104a199600d550879e132d877ee7

          SHA1

          9a702148bcb48c8f666d275b0b08bf2b1711e069

          SHA256

          4f4432ddc88c1bca9f139589c8ce1fcaf016ff167d189e6fb6231057fdf1fff7

          SHA512

          c78a6954104da75ffb6a98447fe36f8297d27929a1eab540eed67e4ec42d35ad46fe0037bf29d7904f36433dce34a27b92556e4e376ef79c1914cc54676adc33

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

          Filesize

          63KB

          MD5

          2d7e104a199600d550879e132d877ee7

          SHA1

          9a702148bcb48c8f666d275b0b08bf2b1711e069

          SHA256

          4f4432ddc88c1bca9f139589c8ce1fcaf016ff167d189e6fb6231057fdf1fff7

          SHA512

          c78a6954104da75ffb6a98447fe36f8297d27929a1eab540eed67e4ec42d35ad46fe0037bf29d7904f36433dce34a27b92556e4e376ef79c1914cc54676adc33

        • memory/1236-54-0x0000000001370000-0x0000000001386000-memory.dmp

          Filesize

          88KB

        • memory/1236-55-0x000000001AA60000-0x000000001AAE0000-memory.dmp

          Filesize

          512KB

        • memory/1280-68-0x0000000001360000-0x0000000001376000-memory.dmp

          Filesize

          88KB

        • memory/1280-69-0x000000001A920000-0x000000001A9A0000-memory.dmp

          Filesize

          512KB

        • memory/1280-70-0x000000001A920000-0x000000001A9A0000-memory.dmp

          Filesize

          512KB