Analysis

  • max time kernel
    144s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240220-en
  • resource tags

    arch:x64arch:x86image:win7-20240220-enlocale:en-usos:windows7-x64system
  • submitted
    14/03/2024, 17:20

General

  • Target

    0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe

  • Size

    3.1MB

  • MD5

    c1c31b17d6e0308357a0769ad7e3baf2

  • SHA1

    dcbf8e23e5ab27f5f8f2c94591aff7d1ec521066

  • SHA256

    0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920

  • SHA512

    d69079f8b7728b72e7815c4445e53109f5a1a4af457ea27fd57dba280762c9bbd3987379ab16505beca45eb8bd5434a2bb7c165d5e93ef2b65163b7b4a71d171

  • SSDEEP

    98304:tHpPDOLrWUJIIrwRbK8X6lLB0L8SLbAEbFrh23K7P:tJPaLSUrYKu6liNskC6j

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Remote Client

C2

pentestpenguin-56392.portmap.host:56392

Mutex

306c98fa-c4cf-4571-bb65-8a72448e6e31

Attributes
  • encryption_key

    6C5CE66574BEE45DBBB983F92C7715A2F771327F

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 5 IoCs
  • Detects .NET executables utilizing NyanX-CAT C# Loader 1 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 5 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 5 IoCs
  • Detects executables containing common artifacts observed in infostealers 5 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 19 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe
    "C:\Users\Admin\AppData\Local\Temp\0a988680e64eaecc70cd3644925c20c3772f8e12c17652bac6eee2596a03e920.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2340
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
        PID:2596
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
        2⤵
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        PID:2600

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • memory/2340-19-0x0000000074500000-0x0000000074BEE000-memory.dmp

            Filesize

            6.9MB

          • memory/2340-1-0x0000000074500000-0x0000000074BEE000-memory.dmp

            Filesize

            6.9MB

          • memory/2340-2-0x0000000000BA0000-0x0000000000BE0000-memory.dmp

            Filesize

            256KB

          • memory/2340-3-0x0000000074500000-0x0000000074BEE000-memory.dmp

            Filesize

            6.9MB

          • memory/2340-4-0x0000000000BA0000-0x0000000000BE0000-memory.dmp

            Filesize

            256KB

          • memory/2340-5-0x0000000004EB0000-0x00000000051D6000-memory.dmp

            Filesize

            3.1MB

          • memory/2340-0-0x0000000000220000-0x0000000000548000-memory.dmp

            Filesize

            3.2MB

          • memory/2600-8-0x0000000000400000-0x0000000000724000-memory.dmp

            Filesize

            3.1MB

          • memory/2600-14-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

            Filesize

            4KB

          • memory/2600-12-0x0000000000400000-0x0000000000724000-memory.dmp

            Filesize

            3.1MB

          • memory/2600-6-0x0000000000400000-0x0000000000724000-memory.dmp

            Filesize

            3.1MB

          • memory/2600-16-0x0000000000400000-0x0000000000724000-memory.dmp

            Filesize

            3.1MB

          • memory/2600-18-0x0000000000400000-0x0000000000724000-memory.dmp

            Filesize

            3.1MB

          • memory/2600-10-0x0000000000400000-0x0000000000724000-memory.dmp

            Filesize

            3.1MB

          • memory/2600-21-0x0000000000400000-0x0000000000724000-memory.dmp

            Filesize

            3.1MB