Analysis

  • max time kernel
    141s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    24-05-2024 08:08

General

  • Target

    ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066.exe

  • Size

    680KB

  • MD5

    47e6542e234e5ffed88732519f19008c

  • SHA1

    b3dd01bf81d5b4b9595c13032d0fc8006dbc7e64

  • SHA256

    ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066

  • SHA512

    98e4ddd035c81623ba2dcc5fc4ca58da3aa6ba10c7bce25ab0a00e7737c11152d6a77507c859f7f369be8fc456189acb5fe90a55064a5bf790e06662f3b589ce

  • SSDEEP

    12288:+Xplx92r2O9Ycny57ohEDGtnXCkgybsySO+TbQnpNwMfgriFg3ikzA6pVPbi81kR:oFTCy5XityUWXUNwMfgrV3ikz8

Malware Config

Extracted

Family

asyncrat

Version

0.5.7B

Botnet

Default

C2

198.55.115.39:6606

198.55.115.39:7707

198.55.115.39:8808

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    Wndfnder.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • Checks computer location settings 2 TTPs 3 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 3 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 39 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 43 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066.exe
    "C:\Users\Admin\AppData\Local\Temp\ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:468
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GGyIJkQ.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1628
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GGyIJkQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmp6193.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4660
    • C:\Users\Admin\AppData\Local\Temp\ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066.exe
      "C:\Users\Admin\AppData\Local\Temp\ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066.exe"
      2⤵
      • Checks computer location settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:792
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Wndfnder" /tr '"C:\Users\Admin\AppData\Roaming\Wndfnder.exe"' & exit
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4988
        • C:\Windows\SysWOW64\schtasks.exe
          schtasks /create /f /sc onlogon /rl highest /tn "Wndfnder" /tr '"C:\Users\Admin\AppData\Roaming\Wndfnder.exe"'
          4⤵
          • Creates scheduled task(s)
          PID:648
      • C:\Windows\SysWOW64\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp7DD6.tmp.bat""
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2532
        • C:\Windows\SysWOW64\timeout.exe
          timeout 3
          4⤵
          • Delays execution with timeout.exe
          PID:2824
        • C:\Users\Admin\AppData\Roaming\Wndfnder.exe
          "C:\Users\Admin\AppData\Roaming\Wndfnder.exe"
          4⤵
          • Checks computer location settings
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2320
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\GGyIJkQ.exe"
            5⤵
            • Command and Scripting Interpreter: PowerShell
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1436
          • C:\Windows\SysWOW64\schtasks.exe
            "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\GGyIJkQ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC908.tmp"
            5⤵
            • Creates scheduled task(s)
            PID:4460
          • C:\Users\Admin\AppData\Roaming\Wndfnder.exe
            "C:\Users\Admin\AppData\Roaming\Wndfnder.exe"
            5⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            PID:3624
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3744 --field-trial-handle=3192,i,2785050981002401924,4037047756083432660,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:456

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066.exe.log

      Filesize

      1KB

      MD5

      b7b9acb869ccc7f7ecb5304ec0384dee

      SHA1

      6a90751c95817903ee833d59a0abbef425a613b3

      SHA256

      8cb00a15cd942a1861c573d86d6fb430512c8e2f80f6349f48b16b8709ca7aa4

      SHA512

      7bec881ac5f59ac26f1be1e7e26d63f040c06369de10c1c246e531a4395d27c335d9acc647ecdedb48ed37bdc2dc405a4cfc11762e1c00659a49be259eaf8764

    • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

      Filesize

      2KB

      MD5

      968cb9309758126772781b83adb8a28f

      SHA1

      8da30e71accf186b2ba11da1797cf67f8f78b47c

      SHA256

      92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

      SHA512

      4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

    • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

      Filesize

      18KB

      MD5

      d683476aa902da6d5d42e0e08b405d55

      SHA1

      60b3c09b4e14cbaac242bfbf54049c21054d5c7c

      SHA256

      818dfd0c021cab72f70737a38dce0c1310a461e0540d728cfcaf1aed5ba9e9a6

      SHA512

      cd28124afa84f59f7c20c8ec62ad2f7e177faca30e62e220f057a14ce4cb827a32241e763653b43b2a7c760e71024d8b19025c982f38ef17a995fc98f0470154

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_nxs3dpxj.j2s.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\tmp6193.tmp

      Filesize

      1KB

      MD5

      560861d4dfbbe0ae4b14beb87c31570d

      SHA1

      17aa17c23ee8b69b174f6aefd789bdc58eea4fa0

      SHA256

      9b33e782c5f1e6fcfc20575fe37fd314ade36c587317228949b357ee43206652

      SHA512

      ca6881c15b8045163a3896d221a88c2f6c0823452afb9907e71d7d97696783c1d51920cf8e6d0a4821be7d155e15c3185603b257949be6652da770a3a1ffbabe

    • C:\Users\Admin\AppData\Local\Temp\tmp7DD6.tmp.bat

      Filesize

      152B

      MD5

      3ef9e22abd43522cc4c2376f714bc09e

      SHA1

      4927ad0042ec6005f27a05a3f4edf1e7d56063c9

      SHA256

      d92b8d53e7d04974aa5ee06e4bf3936c4679d1c4c6af77cb866d84430d21b9c0

      SHA512

      2bb4de78e8b84901cf6f8fd0ad46ee1119b2bc6fc43b6c74fbdbd9788f1b9674772ec3bf695d9fbc4b1e9bae409267633118fc5800780eefb621be54eb4976bc

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

      Filesize

      680KB

      MD5

      47e6542e234e5ffed88732519f19008c

      SHA1

      b3dd01bf81d5b4b9595c13032d0fc8006dbc7e64

      SHA256

      ae55dc186e2373b964f1d84fd51aa7692fdb2994cc163128b97631c3ba7f7066

      SHA512

      98e4ddd035c81623ba2dcc5fc4ca58da3aa6ba10c7bce25ab0a00e7737c11152d6a77507c859f7f369be8fc456189acb5fe90a55064a5bf790e06662f3b589ce

    • memory/468-22-0x0000000074520000-0x0000000074CD0000-memory.dmp

      Filesize

      7.7MB

    • memory/468-6-0x0000000008450000-0x000000000845A000-memory.dmp

      Filesize

      40KB

    • memory/468-9-0x000000000B460000-0x000000000B4D4000-memory.dmp

      Filesize

      464KB

    • memory/468-10-0x0000000006CB0000-0x0000000006D4C000-memory.dmp

      Filesize

      624KB

    • memory/468-15-0x000000007452E000-0x000000007452F000-memory.dmp

      Filesize

      4KB

    • memory/468-8-0x000000000AE10000-0x000000000AE20000-memory.dmp

      Filesize

      64KB

    • memory/468-7-0x000000000B130000-0x000000000B14A000-memory.dmp

      Filesize

      104KB

    • memory/468-0-0x000000007452E000-0x000000007452F000-memory.dmp

      Filesize

      4KB

    • memory/468-5-0x0000000074520000-0x0000000074CD0000-memory.dmp

      Filesize

      7.7MB

    • memory/468-1-0x0000000000FC0000-0x000000000106C000-memory.dmp

      Filesize

      688KB

    • memory/468-4-0x0000000008040000-0x0000000008394000-memory.dmp

      Filesize

      3.3MB

    • memory/468-3-0x0000000007FA0000-0x0000000008032000-memory.dmp

      Filesize

      584KB

    • memory/468-2-0x00000000084B0000-0x0000000008A54000-memory.dmp

      Filesize

      5.6MB

    • memory/468-25-0x0000000074520000-0x0000000074CD0000-memory.dmp

      Filesize

      7.7MB

    • memory/792-45-0x0000000074520000-0x0000000074CD0000-memory.dmp

      Filesize

      7.7MB

    • memory/792-24-0x0000000074520000-0x0000000074CD0000-memory.dmp

      Filesize

      7.7MB

    • memory/792-20-0x0000000000400000-0x0000000000432000-memory.dmp

      Filesize

      200KB

    • memory/1436-104-0x0000000007950000-0x0000000007961000-memory.dmp

      Filesize

      68KB

    • memory/1436-90-0x0000000005EB0000-0x0000000006204000-memory.dmp

      Filesize

      3.3MB

    • memory/1436-92-0x00000000064A0000-0x00000000064EC000-memory.dmp

      Filesize

      304KB

    • memory/1436-93-0x0000000070B00000-0x0000000070B4C000-memory.dmp

      Filesize

      304KB

    • memory/1436-103-0x0000000007400000-0x00000000074A3000-memory.dmp

      Filesize

      652KB

    • memory/1436-105-0x00000000079A0000-0x00000000079B4000-memory.dmp

      Filesize

      80KB

    • memory/1628-39-0x0000000006980000-0x000000000699E000-memory.dmp

      Filesize

      120KB

    • memory/1628-47-0x0000000006EF0000-0x0000000006F22000-memory.dmp

      Filesize

      200KB

    • memory/1628-48-0x0000000070AE0000-0x0000000070B2C000-memory.dmp

      Filesize

      304KB

    • memory/1628-58-0x0000000006ED0000-0x0000000006EEE000-memory.dmp

      Filesize

      120KB

    • memory/1628-59-0x0000000007B40000-0x0000000007BE3000-memory.dmp

      Filesize

      652KB

    • memory/1628-60-0x00000000082F0000-0x000000000896A000-memory.dmp

      Filesize

      6.5MB

    • memory/1628-61-0x0000000007CA0000-0x0000000007CBA000-memory.dmp

      Filesize

      104KB

    • memory/1628-62-0x0000000007D10000-0x0000000007D1A000-memory.dmp

      Filesize

      40KB

    • memory/1628-40-0x00000000069B0000-0x00000000069FC000-memory.dmp

      Filesize

      304KB

    • memory/1628-66-0x0000000007F20000-0x0000000007FB6000-memory.dmp

      Filesize

      600KB

    • memory/1628-67-0x0000000007EA0000-0x0000000007EB1000-memory.dmp

      Filesize

      68KB

    • memory/1628-68-0x0000000007ED0000-0x0000000007EDE000-memory.dmp

      Filesize

      56KB

    • memory/1628-69-0x0000000007EE0000-0x0000000007EF4000-memory.dmp

      Filesize

      80KB

    • memory/1628-70-0x0000000007FE0000-0x0000000007FFA000-memory.dmp

      Filesize

      104KB

    • memory/1628-71-0x0000000007FC0000-0x0000000007FC8000-memory.dmp

      Filesize

      32KB

    • memory/1628-74-0x0000000074520000-0x0000000074CD0000-memory.dmp

      Filesize

      7.7MB

    • memory/1628-34-0x0000000006290000-0x00000000065E4000-memory.dmp

      Filesize

      3.3MB

    • memory/1628-28-0x0000000006120000-0x0000000006186000-memory.dmp

      Filesize

      408KB

    • memory/1628-27-0x00000000060B0000-0x0000000006116000-memory.dmp

      Filesize

      408KB

    • memory/1628-26-0x00000000059A0000-0x00000000059C2000-memory.dmp

      Filesize

      136KB

    • memory/1628-21-0x0000000005A80000-0x00000000060A8000-memory.dmp

      Filesize

      6.2MB

    • memory/1628-19-0x0000000074520000-0x0000000074CD0000-memory.dmp

      Filesize

      7.7MB

    • memory/1628-18-0x0000000074520000-0x0000000074CD0000-memory.dmp

      Filesize

      7.7MB

    • memory/1628-16-0x0000000002EC0000-0x0000000002EF6000-memory.dmp

      Filesize

      216KB