Analysis

  • max time kernel
    142s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/08/2023, 07:01

General

  • Target

    Femetageshuse.exe

  • Size

    556KB

  • MD5

    78a9fbf0b6e82c535aef4c848406d77d

  • SHA1

    b8a419f43674bcfcee6ed5d680ccc02fe1dc6f54

  • SHA256

    24f8a7c390962f0a9094dba45d9000ec7024e87adc7992740311775fcf0bd51d

  • SHA512

    1ab8c6d1199fd9eed809cbc044fe3a5b4c782717dd23a60ea2a0241543b9331922aa7fc593c4214b1610c0105c2681fa6b039be34c7abf71e00df2940e809347

  • SSDEEP

    12288:e81oDihelogYzTEg7eTtAjzDcut04Ma8bJhy8v2N:NaHMzDjzDcutpMaI2N

Score
10/10

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Checks QEMU agent file 2 TTPs 1 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Loads dropped DLL 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Femetageshuse.exe
    "C:\Users\Admin\AppData\Local\Temp\Femetageshuse.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    PID:3836
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3836 -s 2476
      2⤵
      • Program crash
      PID:3708
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 184 -p 3836 -ip 3836
    1⤵
      PID:4448

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\nsb8ABD.tmp\System.dll

            Filesize

            11KB

            MD5

            4d3b19a81bd51f8ce44b93643a4e3a99

            SHA1

            35f8b00e85577b014080df98bd2c378351d9b3e9

            SHA256

            fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce

            SHA512

            b2ba9c961c0e1617f802990587a9000979ab5cc493ae2f8ca852eb43eeaf24916b0b29057dbff7d41a1797dfb2dce3db41990e8639b8f205771dbec3fd80f622

          • memory/3836-145-0x00000000051A0000-0x0000000006263000-memory.dmp

            Filesize

            16.8MB

          • memory/3836-146-0x00000000051A0000-0x0000000006263000-memory.dmp

            Filesize

            16.8MB

          • memory/3836-147-0x0000000077721000-0x0000000077841000-memory.dmp

            Filesize

            1.1MB

          • memory/3836-148-0x00000000051A0000-0x0000000006263000-memory.dmp

            Filesize

            16.8MB

          • memory/3836-149-0x0000000077721000-0x0000000077841000-memory.dmp

            Filesize

            1.1MB