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
  • Sample230808-hs7x9sbb27
  • SHA256 24f8a7c390962f0a9094dba45d9000ec7024e87adc7992740311775fcf0bd51d
  • MD5 SHA1 SHA512 SSDEEP
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

          System.dll

          • Path C:\Users\Admin\AppData\Local\Temp\nsb8ABD.tmp\System.dll
          • Size 11KB
          • SHA256 fda0018ab182ac6025d2fc9a2efcce3745d1da21ce5141859f8286cf319a52ce
          • MD5 SHA1 SHA512 SSDEEP

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

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

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

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

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