Overview

overview

10

Static

static

10

arf.exe

windows10-ltsc 2021-x64

10

arf.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    144s
  • max time network
    149s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20241023-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20241023-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    09/12/2024, 16:03

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General

  • Target

    arf.exe

  • Size

    63KB

  • MD5

    f69a0edbc9c44a09ed18e5a501b6621b

  • SHA1

    7b835c5a70749c3e33c338943344ae65fe6d7aaf

  • SHA256

    b1c2d42876dbd40a3cbce84cd5e4e44b76c2e35c7618f9c831416d6442667d33

  • SHA512

    a8067e96218406d1afa94c827d630b5835374db71c794d6de0f6a75756935cc4b2ee74bb72f9ac2034a6d8ccab81a503aeca01b6fad76b17a59ed4ebd1703644

  • SSDEEP

    1536:diDBlKWYEk2KwYjGbbKwg9z+aGtZVclN:dmlKWYEb6GbbK5VizY

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Version

1.0.7

Botnet

Default

C2

roarwasd12312-34767.portmap.host:8848

roarwasd12312-34767.portmap.host:34767
Mutex

roaroaroaraoroaroaraoraoraoarororrohrorororoaroaaoaoaoaroaroar

Attributes
  • delay

    1

  • install

    true

  • install_file

    windows defender firewall.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 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 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\arf.exe
    "C:\Users\Admin\AppData\Local\Temp\arf.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1260
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2400
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "windows defender firewall" /tr '"C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4568
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp6784.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1812
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3920
      • C:\Users\Admin\AppData\Roaming\windows defender firewall.exe
        "C:\Users\Admin\AppData\Roaming\windows defender firewall.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:1724

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

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        Downloads

        • C:\Users\Admin\AppData\Local\Temp\tmp6784.tmp.bat
          Filesize

          169B

          MD5

          5759942a9c4ab1b3b23b28946c5b26c3

          SHA1

          6510cc353b31e7936f75c9531532adda2296f014

          SHA256

          e7dfc73f93f8e40a85cffbacee740a28b4bb2e6ae05e94ee91875e88e1025d35

          SHA512

          ee4f68e4f88aa82c6a5f8daf001e5ab332474ea0718e03276ac46af3aff222b708316078596cfaa51a26134ddabda9a6670c4b86e5e7adf86a0e0936b755ed57

          Download Submit

        • C:\Users\Admin\AppData\Roaming\windows defender firewall.exe
          Filesize

          63KB

          MD5

          f69a0edbc9c44a09ed18e5a501b6621b

          SHA1

          7b835c5a70749c3e33c338943344ae65fe6d7aaf

          SHA256

          b1c2d42876dbd40a3cbce84cd5e4e44b76c2e35c7618f9c831416d6442667d33

          SHA512

          a8067e96218406d1afa94c827d630b5835374db71c794d6de0f6a75756935cc4b2ee74bb72f9ac2034a6d8ccab81a503aeca01b6fad76b17a59ed4ebd1703644

          Download Submit

        • memory/1260-0-0x00007FFCDA3C3000-0x00007FFCDA3C5000-memory.dmp

          Filesize

          8KB

          Download

        • memory/1260-1-0x00000000004B0000-0x00000000004C6000-memory.dmp

          Filesize

          88KB

          Download

        • memory/1260-2-0x00007FFCDA3C0000-0x00007FFCDAE82000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/1260-3-0x00007FFCDA3C0000-0x00007FFCDAE82000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/1260-8-0x00007FFCDA3C0000-0x00007FFCDAE82000-memory.dmp

          Filesize

          10.8MB

          Download