Overview

overview

10

Static

static

1

Jequirity.exe

windows7-x64

10

Jequirity.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    145s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230221-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230221-enlocale:en-usos:windows10-2004-x64system
  • submitted
    19/04/2023, 11:43

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General

  • Target
    Jequirity.exe
  • Size 260KB
  • Sample230419-nvkhmsca7v
  • SHA256 8f576935bb94657e73e9b2d2aa9d1de9913f69c1a5b1251a526d5258dfe498fa
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
guloaderdownloader

Malware Config

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

    downloaderguloader
  • Checks QEMU agent file 2 TTPs 2 IoCs

    Checks presence of QEMU agent, possibly to detect virtualization.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Loads dropped DLL 1 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 48 IoCs
  • Suspicious behavior: MapViewOfSection 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Jequirity.exe
    "C:\Users\Admin\AppData\Local\Temp\Jequirity.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:2348
    • C:\Users\Admin\AppData\Local\Temp\Jequirity.exe
      "C:\Users\Admin\AppData\Local\Temp\Jequirity.exe"
      2⤵
      • Checks QEMU agent file
      • Checks computer location settings
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      PID:408

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        System.dll
        • Path C:\Users\Admin\AppData\Local\Temp\nsl7D06.tmp\System.dll
        • Size 11KB
        • SHA256 7fe77ca13121a113c59630a3dba0c8aaa6372e8082393274da8f8608c4ce4528
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/408-146-0x0000000000400000-0x0000000001654000-memory.dmp
        Download

        memory/408-147-0x0000000001660000-0x0000000004855000-memory.dmp
        Download

        memory/408-157-0x0000000001660000-0x0000000004855000-memory.dmp
        Download

        memory/408-161-0x0000000000400000-0x0000000001654000-memory.dmp
        Download

        memory/408-162-0x0000000001660000-0x0000000004855000-memory.dmp
        Download

        memory/408-163-0x0000000034EE0000-0x000000003522A000-memory.dmp
        Download

        memory/408-164-0x0000000000400000-0x0000000001654000-memory.dmp
        Download

        memory/2348-144-0x0000000005360000-0x0000000008555000-memory.dmp
        Download

        memory/2348-145-0x0000000005360000-0x0000000008555000-memory.dmp
        Download