Analysis

  • max time kernel
    91s
  • max time network
    102s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/05/2024, 10:36

General

  • Target

    BL&CO.exe

  • Size

    721KB

  • MD5

    35373ea173fb999636a21ad039ce4951

  • SHA1

    d477aa5c029736ca08b927935c901c5f53d454ff

  • SHA256

    3cf1272bbb24cd63faf26b69ab0eaeec8ce789a9e59030cfa79e40150d8ae286

  • SHA512

    83c8ff6bbede26092b21be38caa110d640ad48130ac5e8f48f84f18ede855e81da43420d49efcc905ddc7e448cb8a2f4ea6d2390edd69a878a305fda9b73b834

  • SSDEEP

    12288:mfTeH81jJUDu3+6fov6jk6Jl859MCzjDgC9h0LImZ1tzRI4aP/kR:38MDhyjk6J659M2j8tImVRii

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • 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 1 IoCs

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

  • Adds Run key to start application 2 TTPs 1 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.

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\BL&CO.exe
    "C:\Users\Admin\AppData\Local\Temp\BL&CO.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:448
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\BL&CO.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4832
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\ClBZCJCLlsf.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2244
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ClBZCJCLlsf" /XML "C:\Users\Admin\AppData\Local\Temp\tmp925D.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:4528
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
      2⤵
        PID:3824
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
        2⤵
          PID:3564
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegSvcs.exe"
          2⤵
          • Adds Run key to start application
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:2220

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              1KB

              MD5

              33b19d75aa77114216dbc23f43b195e3

              SHA1

              36a6c3975e619e0c5232aa4f5b7dc1fec9525535

              SHA256

              b23ced31b855e5a39c94afa1f9d55b023b8c40d4dc62143e0539c6916c12c9d2

              SHA512

              676fa2fd34878b75e5899197fe6826bb5604541aa468804bc9835bd3acabed2e6759878a8f1358955413818a51456816e90f149133828575a416c2a74fc7d821

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

              Filesize

              18KB

              MD5

              8c84fb26baf017985e64cad29e77750b

              SHA1

              120f54b03da53325077c1062030f4e2ca1c2e94c

              SHA256

              e9a2712f59cc6613177a3e95311cbe73fdc68f4f43366e25af1b804df6777be1

              SHA512

              8ed612c8cc2258dba973bd4fb5367de484971fc63d464a2f7b75a7ca23f6871391b9e1b289c8163d7d33edb8448ca79551d019c1419af8263cb46abc2795f0c0

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ypbcczxi.yta.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • C:\Users\Admin\AppData\Local\Temp\tmp925D.tmp

              Filesize

              1KB

              MD5

              34feadd87496e6685689d39651c2f2b3

              SHA1

              318516e5afa4e883087e14dedf6db638e43824c6

              SHA256

              2fa9212e4b1339228e8485f3c09012db8dff0fe6f75a666e8e5d30d532257ddf

              SHA512

              e4441594c6ff2f6242978206d30831604a6a9770e3fdfc915189a187e438af4b8a2ea0d11d1661dad0e4588353e47bbbe5424dceca856ffe065235901d482219

            • memory/448-4-0x0000000005960000-0x000000000596A000-memory.dmp

              Filesize

              40KB

            • memory/448-3-0x00000000057A0000-0x0000000005832000-memory.dmp

              Filesize

              584KB

            • memory/448-5-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/448-7-0x00000000072C0000-0x00000000072E0000-memory.dmp

              Filesize

              128KB

            • memory/448-8-0x0000000006A30000-0x0000000006A40000-memory.dmp

              Filesize

              64KB

            • memory/448-9-0x0000000006A40000-0x0000000006A56000-memory.dmp

              Filesize

              88KB

            • memory/448-10-0x0000000007300000-0x0000000007384000-memory.dmp

              Filesize

              528KB

            • memory/448-6-0x0000000005A80000-0x0000000005B1C000-memory.dmp

              Filesize

              624KB

            • memory/448-2-0x0000000005C70000-0x0000000006214000-memory.dmp

              Filesize

              5.6MB

            • memory/448-46-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/448-0-0x00000000746CE000-0x00000000746CF000-memory.dmp

              Filesize

              4KB

            • memory/448-1-0x0000000000D00000-0x0000000000DB8000-memory.dmp

              Filesize

              736KB

            • memory/448-49-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/2220-74-0x00000000063B0000-0x0000000006400000-memory.dmp

              Filesize

              320KB

            • memory/2220-47-0x0000000000400000-0x0000000000442000-memory.dmp

              Filesize

              264KB

            • memory/2244-70-0x0000000006F00000-0x0000000006F1A000-memory.dmp

              Filesize

              104KB

            • memory/2244-67-0x0000000006DC0000-0x0000000006E63000-memory.dmp

              Filesize

              652KB

            • memory/2244-35-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/2244-30-0x0000000005510000-0x0000000005864000-memory.dmp

              Filesize

              3.3MB

            • memory/2244-21-0x0000000004C40000-0x0000000004CA6000-memory.dmp

              Filesize

              408KB

            • memory/2244-45-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/2244-82-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/2244-22-0x00000000054A0000-0x0000000005506000-memory.dmp

              Filesize

              408KB

            • memory/2244-20-0x0000000004B20000-0x0000000004B42000-memory.dmp

              Filesize

              136KB

            • memory/2244-78-0x0000000007220000-0x0000000007228000-memory.dmp

              Filesize

              32KB

            • memory/2244-77-0x0000000007240000-0x000000000725A000-memory.dmp

              Filesize

              104KB

            • memory/2244-76-0x0000000007140000-0x0000000007154000-memory.dmp

              Filesize

              80KB

            • memory/2244-56-0x0000000070D60000-0x0000000070DAC000-memory.dmp

              Filesize

              304KB

            • memory/2244-66-0x0000000006110000-0x000000000612E000-memory.dmp

              Filesize

              120KB

            • memory/2244-55-0x00000000061C0000-0x00000000061F2000-memory.dmp

              Filesize

              200KB

            • memory/2244-75-0x0000000007130000-0x000000000713E000-memory.dmp

              Filesize

              56KB

            • memory/2244-69-0x0000000007550000-0x0000000007BCA000-memory.dmp

              Filesize

              6.5MB

            • memory/2244-18-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/2244-71-0x0000000006F80000-0x0000000006F8A000-memory.dmp

              Filesize

              40KB

            • memory/2244-72-0x0000000007180000-0x0000000007216000-memory.dmp

              Filesize

              600KB

            • memory/2244-73-0x0000000007100000-0x0000000007111000-memory.dmp

              Filesize

              68KB

            • memory/4832-17-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/4832-24-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/4832-54-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB

            • memory/4832-51-0x0000000006180000-0x00000000061CC000-memory.dmp

              Filesize

              304KB

            • memory/4832-50-0x00000000060B0000-0x00000000060CE000-memory.dmp

              Filesize

              120KB

            • memory/4832-16-0x00000000051F0000-0x0000000005818000-memory.dmp

              Filesize

              6.2MB

            • memory/4832-15-0x00000000027D0000-0x0000000002806000-memory.dmp

              Filesize

              216KB

            • memory/4832-23-0x00000000746C0000-0x0000000074E70000-memory.dmp

              Filesize

              7.7MB