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Analysis

  • max time kernel
    90s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    30/01/2023, 18:44

General

  • Target

    PDF Editor/Setup.exe

  • Size

    2.2MB

  • MD5

    57eec9f4c439f340671dacfcf681d57e

  • SHA1

    d85ce1c62994c82d9c8ffcb91a1853a8c6214826

  • SHA256

    140f170d8b83611cb8897164be174495dc51961dc34fbccc9a714917cc341b8f

  • SHA512

    e105343b60bcfedd35d2b304f4d28f23e594db3a4f6b2e4ee00ad9240a34653150320514eca62c3336196e27ce2e6b17032818d34686602815aea6caf8a3e842

  • SSDEEP

    24576:yEG5HvVgakU0978UD+xESC+j5EJlTQNEux5PvuOEVi9RPXSqvmoh1WX/S4G75wAc:yxyCnUCg+kF+emEOjWuwP

Malware Config

Signatures

  • Detect rhadamanthys stealer shellcode 3 IoCs
  • Rhadamanthys

    Rhadamanthys is an info stealer written in C++ first seen in August 2022.

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Blocklisted process makes network request 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

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

  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Accesses Microsoft Outlook profiles 1 TTPs 6 IoCs
  • Checks installed software on the system 1 TTPs

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

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 3 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of WriteProcessMemory 7 IoCs
  • outlook_office_path 1 IoCs
  • outlook_win_path 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\PDF Editor\Setup.exe
    "C:\Users\Admin\AppData\Local\Temp\PDF Editor\Setup.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:3444
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\AppLaunch.exe"
      2⤵
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of WriteProcessMemory
      PID:4924
      • C:\Windows\system32\rundll32.exe
        "C:\Users\Admin\AppData\Roaming\vcredist_e5683ac.dll",Options_RunDLL 0800cc00-0040-04d0-0e67-2d095d587328
        3⤵
        • Blocklisted process makes network request
        • Loads dropped DLL
        • Accesses Microsoft Outlook profiles
        • Checks processor information in registry
        • Suspicious behavior: EnumeratesProcesses
        • outlook_office_path
        • outlook_win_path
        PID:4144

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\vcredist_e5683ac.dll

    Filesize

    53KB

    MD5

    d4819f34c98e00fcff4f6b77d3b28282

    SHA1

    67deabbb185c2b5605957e487802aafe9039f923

    SHA256

    d31a57e03b83291ed81c1d3f054b001b261b103b39b7a8430109c32d8de5d8bd

    SHA512

    3d7c27062b7d3e93d629c7a0eb8dfcdd2d7d2154564d3ab0b4e5d527b177829fcb52ca3c7b5b430d58de22fe27922d7e589c201039c355d7203686a7412f191a

  • C:\Users\Admin\AppData\Roaming\vcredist_e5683ac.dll

    Filesize

    53KB

    MD5

    d4819f34c98e00fcff4f6b77d3b28282

    SHA1

    67deabbb185c2b5605957e487802aafe9039f923

    SHA256

    d31a57e03b83291ed81c1d3f054b001b261b103b39b7a8430109c32d8de5d8bd

    SHA512

    3d7c27062b7d3e93d629c7a0eb8dfcdd2d7d2154564d3ab0b4e5d527b177829fcb52ca3c7b5b430d58de22fe27922d7e589c201039c355d7203686a7412f191a

  • memory/3444-142-0x0000000000580000-0x00000000007C0000-memory.dmp

    Filesize

    2.2MB

  • memory/3444-133-0x0000000000580000-0x00000000007C0000-memory.dmp

    Filesize

    2.2MB

  • memory/3444-132-0x0000000000581000-0x0000000000585000-memory.dmp

    Filesize

    16KB

  • memory/4144-150-0x00007FF4B45E0000-0x00007FF4B46DA000-memory.dmp

    Filesize

    1000KB

  • memory/4144-149-0x000001AD38430000-0x000001AD38437000-memory.dmp

    Filesize

    28KB

  • memory/4144-152-0x00007FF4B45E0000-0x00007FF4B46DA000-memory.dmp

    Filesize

    1000KB

  • memory/4144-153-0x00007FFCD4B60000-0x00007FFCD4B72000-memory.dmp

    Filesize

    72KB

  • memory/4924-144-0x0000000002330000-0x000000000234D000-memory.dmp

    Filesize

    116KB

  • memory/4924-145-0x00000000025E0000-0x00000000035E0000-memory.dmp

    Filesize

    16.0MB

  • memory/4924-141-0x00000000004C0000-0x00000000004F9000-memory.dmp

    Filesize

    228KB

  • memory/4924-135-0x00000000004C0000-0x00000000004F9000-memory.dmp

    Filesize

    228KB

  • memory/4924-151-0x0000000002330000-0x000000000234D000-memory.dmp

    Filesize

    116KB