Analysis

  • max time kernel
    51s
  • max time network
    57s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-06-2024 15:25

General

  • Target

    steamclient.dll

  • Size

    5.7MB

  • MD5

    c324c4fa89de0ad6c8ccd120b7763509

  • SHA1

    3e9e7ba51c449d138363447caab319c98b33c1f7

  • SHA256

    bcb4ccca0f0cadacb290f13f1a1b96a5c387955815e2741a13e73408f15b67a4

  • SHA512

    4bf262dfcd91a7f78c35082ce008acff650fa5d0d6494a6da8f637e1fa88ceee0591d0a7c7201ec7f0946bcee89d329955c5a89902e1ff445ce40b9820e09a7d

  • SSDEEP

    98304:FZesCuKF4kRvLeuQB7pdCgwuT2OcoD7YefRfLSME+WpHOvLZwUN9HDA/B:X3ClWkJLF+7pkgXiWYefxLE+a0vNuZ

Score
9/10

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Windows\system32\rundll32.exe
    rundll32.exe C:\Users\Admin\AppData\Local\Temp\steamclient.dll,#1
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2520
    • C:\Windows\SysWOW64\rundll32.exe
      rundll32.exe C:\Users\Admin\AppData\Local\Temp\steamclient.dll,#1
      2⤵
      • Identifies VirtualBox via ACPI registry values (likely anti-VM)
      • Checks BIOS information in registry
      • Identifies Wine through registry keys
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4100

Network

MITRE ATT&CK Matrix ATT&CK v13

Defense Evasion

Virtualization/Sandbox Evasion

2
T1497

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

2
T1497

System Information Discovery

1
T1082

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/4100-0-0x0000000073500000-0x0000000075557000-memory.dmp
    Filesize

    32.3MB

  • memory/4100-1-0x0000000077AF4000-0x0000000077AF6000-memory.dmp
    Filesize

    8KB

  • memory/4100-2-0x0000000073501000-0x0000000073903000-memory.dmp
    Filesize

    4.0MB

  • memory/4100-3-0x0000000073500000-0x0000000075557000-memory.dmp
    Filesize

    32.3MB

  • memory/4100-4-0x0000000073500000-0x0000000075557000-memory.dmp
    Filesize

    32.3MB