Analysis

  • max time kernel
    143s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230703-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230703-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/08/2023, 09:58

General

  • Target

    7da5b2207cf789cf6807b6cc3373048cbc951d7fd09ca8fb858693cfa5f5edbaexe_JC.exe

  • Size

    254KB

  • MD5

    ab5050f0b4b71352722a6122c8107f83

  • SHA1

    10c6429825adaba12c34696a8ff00879b2abbb88

  • SHA256

    7da5b2207cf789cf6807b6cc3373048cbc951d7fd09ca8fb858693cfa5f5edba

  • SHA512

    ad2608ab646b697504286a909b1f3f454195ba527baa3a27f293f74464a0ca81aac635251f9c8cda2cf9f08650377026f5f7d1fddaa21f4573938c0f2671b8d0

  • SSDEEP

    6144:QQLFhcSHzlojz8oz64NGsj7y78a/YstUX:1FaSRcWCGJz/tW

Score
10/10

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.

  • Loads dropped DLL 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7da5b2207cf789cf6807b6cc3373048cbc951d7fd09ca8fb858693cfa5f5edbaexe_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\7da5b2207cf789cf6807b6cc3373048cbc951d7fd09ca8fb858693cfa5f5edbaexe_JC.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:4956
    • C:\Users\Admin\AppData\Local\Temp\7da5b2207cf789cf6807b6cc3373048cbc951d7fd09ca8fb858693cfa5f5edbaexe_JC.exe
      "C:\Users\Admin\AppData\Local\Temp\7da5b2207cf789cf6807b6cc3373048cbc951d7fd09ca8fb858693cfa5f5edbaexe_JC.exe"
      2⤵
      • Checks QEMU agent file
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      PID:4512

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\nso8F90.tmp\System.dll

          Filesize

          11KB

          MD5

          0063d48afe5a0cdc02833145667b6641

          SHA1

          e7eb614805d183ecb1127c62decb1a6be1b4f7a8

          SHA256

          ac9dfe3b35ea4b8932536ed7406c29a432976b685cc5322f94ef93df920fede7

          SHA512

          71cbbcaeb345e09306e368717ea0503fe8df485be2e95200febc61bcd8ba74fb4211cd263c232f148c0123f6c6f2e3fd4ea20bdecc4070f5208c35c6920240f0

        • C:\Windows\Resources\0409\alfaquins.ini

          Filesize

          42B

          MD5

          0f9aaea120fd9352cf55694c9500e138

          SHA1

          bc89504eadbd05cd616470145910a1d5b66c631e

          SHA256

          24966d03a28e75c5f10be3d0a75a6a2469d88a82cb32c9c8272657f096a89244

          SHA512

          1f21aa429773c03679d3593c5c3983ac3e4c57c8041a9e6b320bfff4330ac2bcff7bf246481c0a05e27966d24e410eaa3555041eb35036c9bb0ed120831811b6

        • memory/4512-357-0x0000000000400000-0x0000000001654000-memory.dmp

          Filesize

          18.3MB

        • memory/4512-358-0x0000000001660000-0x0000000002F70000-memory.dmp

          Filesize

          25.1MB

        • memory/4512-359-0x0000000001660000-0x0000000002F70000-memory.dmp

          Filesize

          25.1MB

        • memory/4512-360-0x0000000077E28000-0x0000000077E29000-memory.dmp

          Filesize

          4KB

        • memory/4512-361-0x0000000000400000-0x0000000001654000-memory.dmp

          Filesize

          18.3MB

        • memory/4512-362-0x0000000077DA1000-0x0000000077EC1000-memory.dmp

          Filesize

          1.1MB

        • memory/4956-353-0x00000000052E0000-0x0000000006BF0000-memory.dmp

          Filesize

          25.1MB

        • memory/4956-354-0x00000000052E0000-0x0000000006BF0000-memory.dmp

          Filesize

          25.1MB

        • memory/4956-355-0x0000000077DA1000-0x0000000077EC1000-memory.dmp

          Filesize

          1.1MB

        • memory/4956-356-0x0000000074C00000-0x0000000074C06000-memory.dmp

          Filesize

          24KB