Overview

overview

10

Static

static

3

rostrap.exe

windows7-x64

10

rostrap.exe

windows10-2004-x64

7

Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240709-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/07/2024, 19:38

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General

  • Target
    rostrap.exe
  • Size 3.8MB
  • Sample240713-ychansvarp
  • SHA256 6e97a3afc6580f3ca0f17a61ee98350d3d3be791bd4c9c3428926e3f40e199be
  • MD5 SHA1 SHA512 SSDEEP
Score
7/10
persistence

Malware Config

Signatures

  • Checks computer location settings 2 TTPs 2 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\rostrap.exe
    "C:\Users\Admin\AppData\Local\Temp\rostrap.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4332
    • C:\Users\Admin\AppData\Local\Temp\RarSFX0\rostrap_setup.exe
      "C:\Users\Admin\AppData\Local\Temp\RarSFX0\rostrap_setup.exe"
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:2800
      • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\BLOXST~2.EXE
        C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\BLOXST~2.EXE
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        PID:4252

Network

        MITRE ATT&CK Enterprise v15

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        Downloads

        BLOXST~2.EXE
        • Path C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\BLOXST~2.EXE
        • Size 10.1MB
        • SHA256 891846bf656253ca1cdd28584a28681e9604e2a03d74cd6b99313e3bff11daf8
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        rostrap_setup.EXE
        • Path C:\Users\Admin\AppData\Local\Temp\RarSFX0\rostrap_setup.EXE
        • Size 3.5MB
        • SHA256 18fc1de44a6e2886e845e94acf0df1c25e73276bfae587fedd8221b9544c89ef
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/4252-19-0x00007FFD761FB000-0x00007FFD761FC000-memory.dmp
        Download