Analysis

  • max time kernel
    147s
  • 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
    05/08/2023, 13:32

General

  • Target

    7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe

  • Size

    512KB

  • MD5

    42836e7a6c9e56debb04aa192c9dd3f0

  • SHA1

    f28722c60a354a79fd6fad6932ff28d1034eaba5

  • SHA256

    7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362

  • SHA512

    01b4a6f7fd965a10628be28f038152dad9de86d7f01bbfb025b238ec5cf941a1b59dc8e727a506f5e94af95b67957d84d494c9cb5e4e69b25160be8a249fce25

  • SSDEEP

    12288:p7LABZYQkao8Rqc5pbIvFPWOLogchFk/cmW1bGfKKxvEFlI:xN8cc5pbGlo6W1bG7dUI

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
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of WriteProcessMemory 10 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe
    "C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"
    1⤵
    • Checks QEMU agent file
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2220
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
      "C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"
      2⤵
        PID:1568
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
        "C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"
        2⤵
          PID:332
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\caspol.exe
          "C:\Users\Admin\AppData\Local\Temp\7247a3f88c9926488072d10907f19c9ed6b73f2ad2e218c89749d53957ba0362exe_JC.exe"
          2⤵
          • Checks QEMU agent file
          • Suspicious use of NtSetInformationThreadHideFromDebugger
          PID:3848

      Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

            • C:\Users\Admin\AppData\Local\Temp\nsuAB83.tmp\System.dll

              Filesize

              11KB

              MD5

              3f176d1ee13b0d7d6bd92e1c7a0b9bae

              SHA1

              fe582246792774c2c9dd15639ffa0aca90d6fd0b

              SHA256

              fa4ab1d6f79fd677433a31ada7806373a789d34328da46ccb0449bbf347bd73e

              SHA512

              0a69124819b7568d0dea4e9e85ce8fe61c7ba697c934e3a95e2dcfb9f252b1d9da7faf8774b6e8efd614885507acc94987733eba09a2f5e7098b774dfc8524b6

            • memory/2220-140-0x0000000004A30000-0x0000000006034000-memory.dmp

              Filesize

              22.0MB

            • memory/2220-141-0x0000000004A30000-0x0000000006034000-memory.dmp

              Filesize

              22.0MB

            • memory/2220-142-0x0000000077581000-0x00000000776A1000-memory.dmp

              Filesize

              1.1MB

            • memory/2220-143-0x0000000077581000-0x00000000776A1000-memory.dmp

              Filesize

              1.1MB

            • memory/2220-144-0x0000000010000000-0x0000000010006000-memory.dmp

              Filesize

              24KB

            • memory/3848-145-0x0000000000B70000-0x0000000002174000-memory.dmp

              Filesize

              22.0MB

            • memory/3848-146-0x0000000000B70000-0x0000000002174000-memory.dmp

              Filesize

              22.0MB

            • memory/3848-147-0x0000000077608000-0x0000000077609000-memory.dmp

              Filesize

              4KB

            • memory/3848-148-0x0000000077581000-0x00000000776A1000-memory.dmp

              Filesize

              1.1MB

            • memory/3848-149-0x0000000000400000-0x000000000062B000-memory.dmp

              Filesize

              2.2MB