Analysis

  • max time kernel
    128s
  • max time network
    135s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-en-20220113
  • submitted
    13-02-2022 10:07

General

  • Target

    36f9a4f21bafa4ade632e47d1f72d31eb0b41d647549f6f455c1ccca9242cde2.exe

  • Size

    2.8MB

  • MD5

    805b3ae4a0c89285f89c4bc51a5f6228

  • SHA1

    269615cb21b20e743ea8a2eb2db85d613f5a6f3c

  • SHA256

    36f9a4f21bafa4ade632e47d1f72d31eb0b41d647549f6f455c1ccca9242cde2

  • SHA512

    27b4fc348885283259f96319475620a0b3bfd879f4d52f2b6eed3ff91e392857ec1846cc6287de8642d8fe70e52ad220483b7b45485dd702a46519cbde2f1188

Malware Config

Signatures

  • suricata: ET MALWARE Observed Win32/CollectorStealer User-Agent M2

    suricata: ET MALWARE Observed Win32/CollectorStealer User-Agent M2

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Reads user/profile data of web browsers 2 TTPs

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

  • Themida packer 4 IoCs

    Detects Themida, an advanced Windows software protection system.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Drops file in Windows directory 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\36f9a4f21bafa4ade632e47d1f72d31eb0b41d647549f6f455c1ccca9242cde2.exe
    "C:\Users\Admin\AppData\Local\Temp\36f9a4f21bafa4ade632e47d1f72d31eb0b41d647549f6f455c1ccca9242cde2.exe"
    1⤵
    • Checks BIOS information in registry
    • Checks computer location settings
    • Checks whether UAC is enabled
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:4868
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\system32\cmd.exe" /c del C:\Users\Admin\AppData\Local\Temp\36F9A4~1.EXE >> NUL
      2⤵
        PID:1824
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k netsvcs -p -s wuauserv
      1⤵
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:1408
    • C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe
      C:\Windows\winsxs\amd64_microsoft-windows-servicingstack_31bf3856ad364e35_10.0.19041.1220_none_7e21bc567c7ed16b\TiWorker.exe -Embedding
      1⤵
      • Drops file in Windows directory
      • Suspicious use of AdjustPrivilegeToken
      PID:2372

    Network

    MITRE ATT&CK Enterprise v6

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • memory/1408-135-0x0000020404960000-0x0000020404970000-memory.dmp

      Filesize

      64KB

    • memory/1408-136-0x0000020404F20000-0x0000020404F30000-memory.dmp

      Filesize

      64KB

    • memory/1408-137-0x00000204075C0000-0x00000204075C4000-memory.dmp

      Filesize

      16KB

    • memory/4868-130-0x0000000000D60000-0x00000000012C6000-memory.dmp

      Filesize

      5.4MB

    • memory/4868-131-0x0000000000D60000-0x00000000012C6000-memory.dmp

      Filesize

      5.4MB

    • memory/4868-132-0x0000000000D60000-0x00000000012C6000-memory.dmp

      Filesize

      5.4MB

    • memory/4868-133-0x0000000000D60000-0x00000000012C6000-memory.dmp

      Filesize

      5.4MB

    • memory/4868-134-0x0000000077854000-0x0000000077856000-memory.dmp

      Filesize

      8KB