Analysis

  • max time kernel
    148s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20230703-en
  • resource tags

    arch:x64arch:x86image:win7-20230703-enlocale:en-usos:windows7-x64system
  • submitted
    12/07/2023, 13:33

General

  • Target

    CC_MAIA TÉCNICApdf.exe

  • Size

    355KB

  • MD5

    3b636ad4cefad536f52ffc6ca715073c

  • SHA1

    54e930e51b42888d43732b4750987f024e870bf5

  • SHA256

    dad1c06013f2a0789dcc44fdec99ff1a51050386e6fe1e482c327d70a80e8657

  • SHA512

    710f666e03c2d727a7aadc62691419d70fadd1566aa7494b6dd43cee72984e3e14b5dcf9be0767229d1459523c9879d05efdd5f08ba78e4358a7e9d271104c38

  • SSDEEP

    6144:1spNjls8PZVheNA+ff0CYpYUSgSAKNkVt7ndz/S24N1m36oYqXgyv0R+5:1c9nhe2evYp/Sfl0dndzp+R+5

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in System32 directory 1 IoCs
  • 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
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CC_MAIA TÉCNICApdf.exe
    "C:\Users\Admin\AppData\Local\Temp\CC_MAIA TÉCNICApdf.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Drops file in System32 directory
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Program Files directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:900
    • C:\Users\Admin\AppData\Local\Temp\CC_MAIA TÉCNICApdf.exe
      "C:\Users\Admin\AppData\Local\Temp\CC_MAIA TÉCNICApdf.exe"
      2⤵
      • Checks QEMU agent file
      • Checks computer location settings
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2108

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • \Users\Admin\AppData\Local\Temp\nso5063.tmp\System.dll

          Filesize

          11KB

          MD5

          17ed1c86bd67e78ade4712be48a7d2bd

          SHA1

          1cc9fe86d6d6030b4dae45ecddce5907991c01a0

          SHA256

          bd046e6497b304e4ea4ab102cab2b1f94ce09bde0eebba4c59942a732679e4eb

          SHA512

          0cbed521e7d6d1f85977b3f7d3ca7ac34e1b5495b69fd8c7bfa1a846baf53b0ecd06fe1ad02a3599082ffacaf8c71a3bb4e32dec05f8e24859d736b828092cd5

        • memory/900-63-0x0000000002650000-0x0000000003ED6000-memory.dmp

          Filesize

          24.5MB

        • memory/900-64-0x0000000002650000-0x0000000003ED6000-memory.dmp

          Filesize

          24.5MB

        • memory/2108-65-0x0000000000400000-0x0000000001462000-memory.dmp

          Filesize

          16.4MB

        • memory/2108-66-0x0000000001470000-0x0000000002CF6000-memory.dmp

          Filesize

          24.5MB

        • memory/2108-67-0x0000000000400000-0x0000000001462000-memory.dmp

          Filesize

          16.4MB

        • memory/2108-88-0x0000000000400000-0x0000000001462000-memory.dmp

          Filesize

          16.4MB

        • memory/2108-89-0x0000000001470000-0x0000000002CF6000-memory.dmp

          Filesize

          24.5MB

        • memory/2108-90-0x0000000001470000-0x0000000002CF6000-memory.dmp

          Filesize

          24.5MB

        • memory/2108-91-0x0000000000400000-0x0000000001462000-memory.dmp

          Filesize

          16.4MB

        • memory/2108-93-0x00000000330B0000-0x00000000333B3000-memory.dmp

          Filesize

          3.0MB