Analysis

  • max time kernel
    151s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27-03-2024 02:29

General

  • Target

    8c5c6b99a06119e1064bfcf3f53cc66150751c0969dc37dc3603eef5535a8af9.exe

  • Size

    610KB

  • MD5

    66e196c15ec46d1e7526b1c48da1b72a

  • SHA1

    f9b2dc950a21c296aaf57a013c3f4e93f8ebbad2

  • SHA256

    8c5c6b99a06119e1064bfcf3f53cc66150751c0969dc37dc3603eef5535a8af9

  • SHA512

    f8d8241d5af76033ba83caff888d325285110356b8e35175260a912cf416670465d218d7c550b9f15cc969bc2f53381cb8e41dd4f9a859cae65e4df600b6f851

  • SSDEEP

    12288:yRfHhxVzsP5wzyNwv5gs3MjeNPq0wKrCHrT3GQzRVPUYvV3L2dXEg:yXxU5wzaktc4PEWCHfGQzbPfvFydXEg

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

    Agent Tesla is a remote access tool (RAT) written in visual basic.

  • UAC bypass 3 TTPs 1 IoCs
  • Windows security bypass 2 TTPs 2 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 1 IoCs
  • Reads WinSCP keys stored on the system 2 TTPs

    Tries to access WinSCP stored sessions.

  • Reads data files stored by FTP clients 2 TTPs

    Tries to access configuration files associated with programs like FileZilla.

  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Windows security modification 2 TTPs 3 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Checks whether UAC is enabled 1 TTPs 2 IoCs
  • Suspicious use of SetThreadContext 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.

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs
  • System policy modification 1 TTPs 1 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\8c5c6b99a06119e1064bfcf3f53cc66150751c0969dc37dc3603eef5535a8af9.exe
    "C:\Users\Admin\AppData\Local\Temp\8c5c6b99a06119e1064bfcf3f53cc66150751c0969dc37dc3603eef5535a8af9.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2460
    • 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:2488
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchost" /tr '"C:\Users\Admin\AppData\Roaming\svchost.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:3340
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp806B.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4580
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:1180
      • C:\Users\Admin\AppData\Roaming\svchost.exe
        "C:\Users\Admin\AppData\Roaming\svchost.exe"
        3⤵
        • UAC bypass
        • Windows security bypass
        • Checks computer location settings
        • Executes dropped EXE
        • Windows security modification
        • Checks whether UAC is enabled
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        • System policy modification
        PID:636
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\svchost.exe" -Force
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:976
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regasm.exe"
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2544
  • 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=4736 --field-trial-handle=2808,i,4621512294509789388,1545966267740426092,262144 --variations-seed-version /prefetch:8
    1⤵
      PID:4432

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_50xw5hw2.30z.ps1
      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\tmp806B.tmp.bat
      Filesize

      151B

      MD5

      365db666be983dcc5a549fbdad3c2a14

      SHA1

      8b73c25616a602fdeff94df46ff41e43fdce2f9f

      SHA256

      e1e16d5e43b8f3b289293262f8bd1593fa9c1e48c1b134d2f3fd19a61ca64360

      SHA512

      fddc245ad0ad3ba2e4cf62238bd6a1ba7f5d50b157e760c160ab992e9ef761e6affdb7b6fa05ab4cdfd2a6e3a5ca038d0a8c5a377d1e1a7cc2bba77ecfef4d09

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

      610KB

      MD5

      66e196c15ec46d1e7526b1c48da1b72a

      SHA1

      f9b2dc950a21c296aaf57a013c3f4e93f8ebbad2

      SHA256

      8c5c6b99a06119e1064bfcf3f53cc66150751c0969dc37dc3603eef5535a8af9

      SHA512

      f8d8241d5af76033ba83caff888d325285110356b8e35175260a912cf416670465d218d7c550b9f15cc969bc2f53381cb8e41dd4f9a859cae65e4df600b6f851

    • memory/636-38-0x00007FFBE56E0000-0x00007FFBE61A1000-memory.dmp
      Filesize

      10.8MB

    • memory/636-14-0x00007FFBE56E0000-0x00007FFBE61A1000-memory.dmp
      Filesize

      10.8MB

    • memory/976-28-0x000002176F710000-0x000002176F720000-memory.dmp
      Filesize

      64KB

    • memory/976-30-0x000002176F710000-0x000002176F720000-memory.dmp
      Filesize

      64KB

    • memory/976-34-0x00007FFBE56E0000-0x00007FFBE61A1000-memory.dmp
      Filesize

      10.8MB

    • memory/976-29-0x000002176F710000-0x000002176F720000-memory.dmp
      Filesize

      64KB

    • memory/976-24-0x000002176F710000-0x000002176F720000-memory.dmp
      Filesize

      64KB

    • memory/976-21-0x0000021757190000-0x00000217571B2000-memory.dmp
      Filesize

      136KB

    • memory/976-22-0x00007FFBE56E0000-0x00007FFBE61A1000-memory.dmp
      Filesize

      10.8MB

    • memory/2460-4-0x0000022FB6050000-0x0000022FB60E4000-memory.dmp
      Filesize

      592KB

    • memory/2460-1-0x00007FFBE6390000-0x00007FFBE6E51000-memory.dmp
      Filesize

      10.8MB

    • memory/2460-0-0x0000022F9B020000-0x0000022F9B02C000-memory.dmp
      Filesize

      48KB

    • memory/2460-3-0x0000022F9CEC0000-0x0000022F9CED0000-memory.dmp
      Filesize

      64KB

    • memory/2460-9-0x00007FFBE6390000-0x00007FFBE6E51000-memory.dmp
      Filesize

      10.8MB

    • memory/2460-2-0x0000022F9CEC0000-0x0000022F9CED0000-memory.dmp
      Filesize

      64KB

    • memory/2544-36-0x0000000005460000-0x00000000054C6000-memory.dmp
      Filesize

      408KB

    • memory/2544-35-0x00000000058A0000-0x0000000005E44000-memory.dmp
      Filesize

      5.6MB

    • memory/2544-33-0x0000000074740000-0x0000000074EF0000-memory.dmp
      Filesize

      7.7MB

    • memory/2544-37-0x0000000005260000-0x0000000005270000-memory.dmp
      Filesize

      64KB

    • memory/2544-15-0x0000000000400000-0x0000000000440000-memory.dmp
      Filesize

      256KB

    • memory/2544-39-0x0000000006350000-0x00000000063A0000-memory.dmp
      Filesize

      320KB

    • memory/2544-40-0x0000000006440000-0x00000000064D2000-memory.dmp
      Filesize

      584KB

    • memory/2544-41-0x00000000063D0000-0x00000000063DA000-memory.dmp
      Filesize

      40KB

    • memory/2544-42-0x0000000074740000-0x0000000074EF0000-memory.dmp
      Filesize

      7.7MB

    • memory/2544-43-0x0000000005260000-0x0000000005270000-memory.dmp
      Filesize

      64KB