Analysis

  • max time kernel
    136s
  • max time network
    151s
  • 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 01:38

General

  • Target

    9c457b1cd061ae951fbed7841149b247e085befa6e2c5170058ce35cdebce548.exe

  • Size

    47KB

  • MD5

    6d13d147a209e3be044035f0c03b7bde

  • SHA1

    1eb5fb487ea7742ff1766ca5bf1b7191cfcf6283

  • SHA256

    9c457b1cd061ae951fbed7841149b247e085befa6e2c5170058ce35cdebce548

  • SHA512

    a159d09265fa833afddce5fe7fab6d4be0fc37fd4c2e0d1a15851427764ad3c068249ba28d000a076209d017cb65e4320752ac7a3a0314239d836f1e15ae39a9

  • SSDEEP

    768:IuyxNTAoZjRWUJd9bmo2qL2TJ4+3Qk8sna9lzPIaj9vtqb5HTKsvWy0oKCnX5Eev:IuyxNTAGL2Mk839lcaj9vIbJWsZoWFnt

Score
10/10

Malware Config

Extracted

Family

asyncrat

Version

0.5.8

Botnet

Default

C2

127.0.0.1:6606

127.0.0.1:7707

127.0.0.1:8808

94.232.249.111:6606

94.232.249.111:7707

94.232.249.111:8808

Mutex

o6tEeoRxJb0n

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
  • Detects file containing reversed ASEP Autorun registry keys 2 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).

  • 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\9c457b1cd061ae951fbed7841149b247e085befa6e2c5170058ce35cdebce548.exe
    "C:\Users\Admin\AppData\Local\Temp\9c457b1cd061ae951fbed7841149b247e085befa6e2c5170058ce35cdebce548.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4352
    • 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:1232
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4344
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp4CA9.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4284
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4540
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1240

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp4CA9.tmp.bat

    Filesize

    151B

    MD5

    b6290a166a35093925f84a9f483b5fc9

    SHA1

    a220267a4a2f584ae31b63ad46afd432688be9df

    SHA256

    4285b3660aab3e83bdfc2b85d8430f331345de44568ac9771328d4e43b0f0056

    SHA512

    23d896b61304ecd81cbd1321c6834830894af019cf39b06c360369a5e2d6831abb8d1df0f863810fabcff8f3b0ca1c71805a5ecd28e43008a464b241c635e340

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

    Filesize

    47KB

    MD5

    6d13d147a209e3be044035f0c03b7bde

    SHA1

    1eb5fb487ea7742ff1766ca5bf1b7191cfcf6283

    SHA256

    9c457b1cd061ae951fbed7841149b247e085befa6e2c5170058ce35cdebce548

    SHA512

    a159d09265fa833afddce5fe7fab6d4be0fc37fd4c2e0d1a15851427764ad3c068249ba28d000a076209d017cb65e4320752ac7a3a0314239d836f1e15ae39a9

  • memory/1240-13-0x0000000074970000-0x0000000075120000-memory.dmp

    Filesize

    7.7MB

  • memory/1240-14-0x0000000074970000-0x0000000075120000-memory.dmp

    Filesize

    7.7MB

  • memory/4352-0-0x0000000074A0E000-0x0000000074A0F000-memory.dmp

    Filesize

    4KB

  • memory/4352-1-0x00000000003E0000-0x00000000003F2000-memory.dmp

    Filesize

    72KB

  • memory/4352-2-0x0000000074A00000-0x00000000751B0000-memory.dmp

    Filesize

    7.7MB

  • memory/4352-3-0x0000000004D00000-0x0000000004D9C000-memory.dmp

    Filesize

    624KB

  • memory/4352-8-0x0000000074A00000-0x00000000751B0000-memory.dmp

    Filesize

    7.7MB