Analysis

  • max time kernel
    148s
  • max time network
    156s
  • platform
    windows10-1703_x64
  • resource
    win10-20240221-en
  • resource tags

    arch:x64arch:x86image:win10-20240221-enlocale:en-usos:windows10-1703-x64system
  • submitted
    01/03/2024, 20:55

General

  • Target

    AsyncClient.exe

  • Size

    47KB

  • MD5

    1318c166e2823474696400cb49c69019

  • SHA1

    41cac1850c0e996752475baa19716b0dfcf88351

  • SHA256

    5b23cda7e61a7e54331995b5eab48efd59ff50455881027ea8bd5cd70a6833a0

  • SHA512

    1fad54e3f6b8c1ac376456aa4f3be361898e9126955425f75181a7f9d2e28e09597a60a7ccd8588af47ebad9b3672ab53e09321b82bc51df4536442c96bc157f

  • SSDEEP

    768:tuEs9THvkHCWU0neImo2q8HWdbFk+AH5PIM0690bRkYnT/fGdaRSl8BDZvx:tuEs9THc72ibF4H2M06abR1DOsRldvx

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

adsf

C2

FearME-55506.portmap.host:5508

FearME-55506.portmap.host:55506

Mutex

LlyPtPKotdCY

Attributes
  • delay

    3

  • install

    true

  • install_file

    test.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
  • 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 15 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⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:192
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4908
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "test" /tr '"C:\Users\Admin\AppData\Roaming\test.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:2904
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpFED2.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4912
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3548
      • C:\Users\Admin\AppData\Roaming\test.exe
        "C:\Users\Admin\AppData\Roaming\test.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:244

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmpFED2.tmp.bat

          Filesize

          148B

          MD5

          c910cec0bd28b6fa70c0d6e4440b0512

          SHA1

          62b42e7925e925a003c15af6537fd67d786644c2

          SHA256

          67b0dc44c8eaef07107eac1b919eb976ac644f894bd30cf6bd83e4009c584a70

          SHA512

          83d68a61dbc906665280cde3f33d84135978bee5ccf4e48bbb10cb88de6348c3a3f6dbbc45c491024c792ccab4c4985bf464b80dc16e563a4813db442b9938c0

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

          Filesize

          47KB

          MD5

          1318c166e2823474696400cb49c69019

          SHA1

          41cac1850c0e996752475baa19716b0dfcf88351

          SHA256

          5b23cda7e61a7e54331995b5eab48efd59ff50455881027ea8bd5cd70a6833a0

          SHA512

          1fad54e3f6b8c1ac376456aa4f3be361898e9126955425f75181a7f9d2e28e09597a60a7ccd8588af47ebad9b3672ab53e09321b82bc51df4536442c96bc157f

        • memory/192-0-0x00000000007E0000-0x00000000007F2000-memory.dmp

          Filesize

          72KB

        • memory/192-1-0x0000000073E70000-0x000000007455E000-memory.dmp

          Filesize

          6.9MB

        • memory/192-2-0x00000000012B0000-0x00000000012C0000-memory.dmp

          Filesize

          64KB

        • memory/192-3-0x0000000005190000-0x000000000522C000-memory.dmp

          Filesize

          624KB

        • memory/192-8-0x0000000073E70000-0x000000007455E000-memory.dmp

          Filesize

          6.9MB

        • memory/244-13-0x0000000073DD0000-0x00000000744BE000-memory.dmp

          Filesize

          6.9MB

        • memory/244-14-0x0000000005850000-0x0000000005860000-memory.dmp

          Filesize

          64KB

        • memory/244-15-0x0000000073DD0000-0x00000000744BE000-memory.dmp

          Filesize

          6.9MB

        • memory/244-16-0x0000000005850000-0x0000000005860000-memory.dmp

          Filesize

          64KB