Analysis

  • max time kernel
    146s
  • max time network
    123s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30-03-2023 07:54

General

  • Target

    Tordenbygen72.exe

  • Size

    628KB

  • MD5

    ac85335afe1237e78ba86beb2950c3bc

  • SHA1

    7ecdd418b3a15a858f86776969da3a3b0e04f9dc

  • SHA256

    09606aab0e4d6b1ad408da37e0245df53c5769960e8f1aca6e12b6ab979ed4c9

  • SHA512

    8e5042b331c60808ac6c4cc79f888eceb35478a06cd89de8977a7c83282861eaacb2adcd70e0431a1525bb8edd68918b056cd6099569d42be13c86d09783c615

  • SSDEEP

    12288:1rAEtSq41AlJzRM+hAxPa3lRgG6xZxzyVLehCFBAx:1rAEYq4WfdMLNa1U/zy1ehCvA

Malware Config

Extracted

Family

agenttesla

Credentials

Signatures

  • AgentTesla

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

  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Loads dropped DLL 2 IoCs
  • Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Tordenbygen72.exe
    "C:\Users\Admin\AppData\Local\Temp\Tordenbygen72.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Program Files directory
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4788
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
      "C:\Users\Admin\AppData\Local\Temp\Tordenbygen72.exe"
      2⤵
        PID:4648
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
        "C:\Users\Admin\AppData\Local\Temp\Tordenbygen72.exe"
        2⤵
        • Checks QEMU agent file
        • Accesses Microsoft Outlook profiles
        • Suspicious use of NtCreateThreadExHideFromDebugger
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • Suspicious use of AdjustPrivilegeToken
        • outlook_office_path
        • outlook_win_path
        PID:2636

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\nsj6C5D.tmp\System.dll

      Filesize

      11KB

      MD5

      9625d5b1754bc4ff29281d415d27a0fd

      SHA1

      80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

      SHA256

      c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

      SHA512

      dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

    • C:\Users\Admin\AppData\Local\Temp\nsj6C5D.tmp\System.dll

      Filesize

      11KB

      MD5

      9625d5b1754bc4ff29281d415d27a0fd

      SHA1

      80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

      SHA256

      c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

      SHA512

      dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

    • C:\Users\Admin\AppData\Local\Temp\nsj6C5D.tmp\System.dll

      Filesize

      11KB

      MD5

      9625d5b1754bc4ff29281d415d27a0fd

      SHA1

      80e85afc5cccd4c0a3775edbb90595a1a59f5ce0

      SHA256

      c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448

      SHA512

      dce52b640897c2e8dbfd0a1472d5377fa91fb9cf1aeff62604d014bccbe5b56af1378f173132abeb0edd18c225b9f8f5e3d3e72434aed946661e036c779f165b

    • memory/2636-156-0x0000000000400000-0x000000000062B000-memory.dmp

      Filesize

      2.2MB

    • memory/2636-160-0x0000000000400000-0x000000000062B000-memory.dmp

      Filesize

      2.2MB

    • memory/2636-161-0x00000000013B0000-0x0000000004EC1000-memory.dmp

      Filesize

      59.1MB

    • memory/2636-162-0x0000000000400000-0x0000000000430000-memory.dmp

      Filesize

      192KB

    • memory/2636-163-0x0000000038560000-0x0000000038B04000-memory.dmp

      Filesize

      5.6MB

    • memory/2636-164-0x0000000038150000-0x0000000038160000-memory.dmp

      Filesize

      64KB

    • memory/2636-165-0x0000000001310000-0x0000000001376000-memory.dmp

      Filesize

      408KB

    • memory/2636-167-0x0000000038150000-0x0000000038160000-memory.dmp

      Filesize

      64KB

    • memory/2636-168-0x0000000038F70000-0x0000000039002000-memory.dmp

      Filesize

      584KB

    • memory/2636-169-0x0000000038F00000-0x0000000038F0A000-memory.dmp

      Filesize

      40KB

    • memory/2636-170-0x00000000391D0000-0x0000000039220000-memory.dmp

      Filesize

      320KB

    • memory/2636-171-0x00000000393F0000-0x00000000395B2000-memory.dmp

      Filesize

      1.8MB