Overview

overview

10

Static

static

10

MicroStrap.exe

windows7-x64

10

MicroStrap.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    126s
  • max time network
    143s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-01-2025 23:34

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General

  • Target

    MicroStrap.exe

  • Size

    74KB

  • MD5

    9785b81af0d8b024dadd31659a3a2d24

  • SHA1

    14f4539dc755b69ad28f9c1953aeec3620669588

  • SHA256

    fec63e2ee9e830df5298bd72464fe6753a60a5ef14bd3023e9ab99260878b3df

  • SHA512

    002df3d93cde212d4a9678f167201599d5e874defe15f2e46494d72f442692bf62a8fcfa226963f0575335f0b1062a61508ca143b95614eef4a6d7cd563c5120

  • SSDEEP

    1536:OUKkcx9pXCTyPMVEZ8kyIgH1bO/zeoBDQzcOLVclN:OUDcx958yPMVEZ81H1bOLRDQHBY

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

195.88.218.126:2404

Mutex

rnxgsvfqmra

Attributes
  • delay

    1

  • 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#.

    ratasyncrat
  • Asyncrat family
    asyncrat
  • Async RAT payload 1 IoCs
    rat
  • 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
    evasion
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 30 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 10 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.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\MicroStrap.exe
    "C:\Users\Admin\AppData\Local\Temp\MicroStrap.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3308
    • C:\Windows\System32\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:3016
      • C:\Windows\system32\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:4908
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpB3FE.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4648
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3472
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:332

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmpB3FE.tmp.bat
    Filesize

    151B

    MD5

    676651db66456062982166dd93e52012

    SHA1

    224f3ddfabf7df547d7c56c0f5f4e953a7938f14

    SHA256

    ffc8c99c441aa06b043c179f8c13ed404ead5a3835b47e67fea253013f5c8026

    SHA512

    8111cea3511fac85f512449330d343e458f7150700a332349aeda3e39fba8ea85501bd081514b56d1a9a9a47eb354dac74174c1a1ae3b3d2cb73f993e539e37d

    Download Submit

  • C:\Users\Admin\AppData\Roaming\MyData\DataLogs.conf
    Filesize

    8B

    MD5

    cf759e4c5f14fe3eec41b87ed756cea8

    SHA1

    c27c796bb3c2fac929359563676f4ba1ffada1f5

    SHA256

    c9f9f193409217f73cc976ad078c6f8bf65d3aabcf5fad3e5a47536d47aa6761

    SHA512

    c7f832aee13a5eb36d145f35d4464374a9e12fa2017f3c2257442d67483b35a55eccae7f7729243350125b37033e075efbc2303839fd86b81b9b4dca3626953b

    Download Submit

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

    74KB

    MD5

    9785b81af0d8b024dadd31659a3a2d24

    SHA1

    14f4539dc755b69ad28f9c1953aeec3620669588

    SHA256

    fec63e2ee9e830df5298bd72464fe6753a60a5ef14bd3023e9ab99260878b3df

    SHA512

    002df3d93cde212d4a9678f167201599d5e874defe15f2e46494d72f442692bf62a8fcfa226963f0575335f0b1062a61508ca143b95614eef4a6d7cd563c5120

    Download Submit

  • memory/3308-0-0x00007FFD9C523000-0x00007FFD9C525000-memory.dmp

    Filesize

    8KB

    Download

  • memory/3308-1-0x0000000000AE0000-0x0000000000AF8000-memory.dmp

    Filesize

    96KB

    Download

  • memory/3308-3-0x00007FFD9C520000-0x00007FFD9CFE1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3308-8-0x00007FFD9C520000-0x00007FFD9CFE1000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/3308-9-0x00007FFD9C520000-0x00007FFD9CFE1000-memory.dmp

    Filesize

    10.8MB

    Download