Extracted

• • Target

    RFQ-948563836483638563735435376354.xls

  • Size

    706KB

  • MD5

    4a41468b2a645e97f084f9b3b2d11d5d

  • SHA1

    2a5548c0b61fc6a3e2f572c580731e02824d966c

  • SHA256

    5f6994bb56a6b6962eea0bb1c80dbabdb29cddf2ff323551ad7f307a7fbe8936

  • SHA512

    c6bb1c5be60acf8f0b28a76b7a3814dfd169b7f36501437f9e1c6151a18d4acaca6adaca1c537198c4fec1cbd4e0f1760b2eba840699d0054c20a3ae00931460

  • SSDEEP

    12288:z+UOAsHFnd7HeT/o8gg8Rsfe8B+j6BeuMOTT3n7j8p3tdrBpG2uCBbuwiLz:zepsAbg8RINMq33EtnpZowiL

  Score

  10^/10

  guloaderremcosrem_doc2defense_evasiondiscoverydownloaderexecutionpersistencerat

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

    downloaderguloader

  • Process spawned unexpected child process

    This typically indicates the parent process was compromised via an exploit or macro.

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

    ratremcos

  • Blocklisted process makes network request

  • Command and Scripting Interpreter: PowerShell

    Run Powershell and hide display window.

    execution

  • Downloads MZ/PE file

  • Evasion via Device Credential Deployment

    defense_evasionexecution

  • Executes dropped EXE

  • Loads dropped DLL

  • Adds Run key to start application

    persistence

  • Drops file in System32 directory

  • Suspicious use of NtCreateThreadExHideFromDebugger

  • Suspicious use of NtSetInformationThreadHideFromDebugger

  • Suspicious use of SetThreadContext

  behavioral1behavioral2