Overview

overview

10

Static

static

10

loader.exe

windows7-x64

10

loader.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230915-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230915-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09/10/2023, 05:38

Sharing

Copy URL Twitter E-mail
Report Analysis Logs

General

  • Target

    loader.exe

  • Size

    63KB

  • MD5

    b7139dd7b8c7d14c06cb46719cf818d9

  • SHA1

    784e3beadf729a25ec87827de6fc03f45a5401e9

  • SHA256

    27dce8fe15028dd63e2f54428952c1cfe42c63863b2173da8925f0a089fa5b89

  • SHA512

    d291ae4dc46a5af298c9d7dd97ed6b35b8ed2ac98bc121e7da152df77cf62a45d8a705f7f1a17f650c9fb55e4095ad3567883173b54c7870d283f1ca10a9cdc4

  • SSDEEP

    768:wcUiy5HN578DsC8A+XQzvRIOdJD7P7DEhfW1+T4iSBGHmDbDuphroXkO3RZ0UDt4:KpN/wD7jhBYUbAhCN3taucdpqKmY7

Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

asyncrat

Botnet

Default

C2

127.0.0.1:2743

Mutex

迪x杰伊尺YEDMΙ尺ΙF西Ε0

Attributes
  • delay

    1

  • install

    true

  • install_file

    loader.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Async RAT payload 3 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).

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 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\loader.exe
    "C:\Users\Admin\AppData\Local\Temp\loader.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:5060
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "loader" /tr '"C:\Users\Admin\AppData\Roaming\loader.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2916
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "loader" /tr '"C:\Users\Admin\AppData\Roaming\loader.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:4140
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp702F.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3396
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2592
      • C:\Users\Admin\AppData\Roaming\loader.exe
        "C:\Users\Admin\AppData\Roaming\loader.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:4952

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\loader.exe.log
          Filesize

          871B

          MD5

          d58f949aad7df2e7b55248bfdfc6e1b8

          SHA1

          6713cad396b5808b66ede2dd9b169e00d5e5018f

          SHA256

          5e1611e4d915fd9759825811fa4463f09172889f85889a2942be1561948fab8a

          SHA512

          bdddb838108c4f3f0a7737703cbde935fe26aaea97459bb099c4c773c0789997283d7f20ac7ea4ac2aedef23515afc0b251b5b461aa12d3b7a60846b87b26e38

          Download Submit

        • C:\Users\Admin\AppData\Local\Temp\tmp702F.tmp.bat
          Filesize

          150B

          MD5

          d8b0cea081fb21e995167e0ef88ada6f

          SHA1

          c6cd08869704a160ea416217e461ca767219abdf

          SHA256

          e30b6d0427de6c42cf12679f2a50d2ad8b7934d0e42249937218c006e1f9f4f7

          SHA512

          40ac5150b9db175e696ec3050411a2cb20e855e3ca83a2d79bd40d45dccfeacede98d1e1adfdcc00cf90a7017ec6169e6c9b25f6e7e682d417e47b51bda57f78

          Download Submit

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

          63KB

          MD5

          b7139dd7b8c7d14c06cb46719cf818d9

          SHA1

          784e3beadf729a25ec87827de6fc03f45a5401e9

          SHA256

          27dce8fe15028dd63e2f54428952c1cfe42c63863b2173da8925f0a089fa5b89

          SHA512

          d291ae4dc46a5af298c9d7dd97ed6b35b8ed2ac98bc121e7da152df77cf62a45d8a705f7f1a17f650c9fb55e4095ad3567883173b54c7870d283f1ca10a9cdc4

          Download Submit

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

          63KB

          MD5

          b7139dd7b8c7d14c06cb46719cf818d9

          SHA1

          784e3beadf729a25ec87827de6fc03f45a5401e9

          SHA256

          27dce8fe15028dd63e2f54428952c1cfe42c63863b2173da8925f0a089fa5b89

          SHA512

          d291ae4dc46a5af298c9d7dd97ed6b35b8ed2ac98bc121e7da152df77cf62a45d8a705f7f1a17f650c9fb55e4095ad3567883173b54c7870d283f1ca10a9cdc4

          Download Submit

        • memory/4952-18-0x000000001BAC0000-0x000000001BAD0000-memory.dmp

          Filesize

          64KB

          Download

        • memory/4952-17-0x00007FFBE5D10000-0x00007FFBE67D1000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/4952-16-0x00007FFBE5D10000-0x00007FFBE67D1000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/5060-5-0x00007FFC03750000-0x00007FFC03945000-memory.dmp

          Filesize

          2.0MB

          Download

        • memory/5060-10-0x00007FFC03750000-0x00007FFC03945000-memory.dmp

          Filesize

          2.0MB

          Download

        • memory/5060-9-0x00007FFBE5E40000-0x00007FFBE6901000-memory.dmp

          Filesize

          10.8MB

          Download

        • memory/5060-8-0x00007FFBEEF40000-0x00007FFBEEF59000-memory.dmp

          Filesize

          100KB

          Download

        • memory/5060-0-0x0000000000A50000-0x0000000000A66000-memory.dmp

          Filesize

          88KB

          Download

        • memory/5060-2-0x000000001B6C0000-0x000000001B6D0000-memory.dmp

          Filesize

          64KB

          Download

        • memory/5060-1-0x00007FFBE5E40000-0x00007FFBE6901000-memory.dmp

          Filesize

          10.8MB

          Download