Analysis

  • max time kernel
    1797s
  • max time network
    1810s
  • platform
    windows10-1703_x64
  • resource
    win10-20231020-en
  • resource tags

    arch:x64arch:x86image:win10-20231020-enlocale:en-usos:windows10-1703-x64system
  • submitted
    27-11-2023 18:45

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    0c5f6822969f4890cf44d814332f28b9

  • SHA1

    d17f440cb2ce53963555bb3c9e4953edc82039d0

  • SHA256

    f50ff41e503c8b504faa61db21e97a1525c97eb97fa2e88f835ce473017b4214

  • SHA512

    d355810d1eff5587606bda7081fefbaa498b7e16754eae01c1efba5ece4ded9d229b07acf437b9ddf9328d6b11c58e376afd727cc8f2cd396a6d8b39ede3a054

  • SSDEEP

    49152:DvKI22SsaNYfdPBldt698dBcjH+4mCmzPLoGdUqTHHB72eh2NT:Dvn22SsaNYfdPBldt6+dBcjH+4mb

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

vxc-63595.portmap.host:63595

Mutex

a8ba728a-8b60-42d1-998f-e0693b23224e

Attributes
  • encryption_key

    416C833148C29219D245197DE247D78A39EC13E5

  • 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 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2960

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2960-0-0x0000000000580000-0x00000000008A4000-memory.dmp

    Filesize

    3.1MB

  • memory/2960-1-0x00007FFFD7A20000-0x00007FFFD840C000-memory.dmp

    Filesize

    9.9MB

  • memory/2960-2-0x000000001B4B0000-0x000000001B4C0000-memory.dmp

    Filesize

    64KB

  • memory/2960-3-0x000000001B4C0000-0x000000001B510000-memory.dmp

    Filesize

    320KB

  • memory/2960-4-0x000000001BA50000-0x000000001BB02000-memory.dmp

    Filesize

    712KB

  • memory/2960-7-0x000000001B550000-0x000000001B562000-memory.dmp

    Filesize

    72KB

  • memory/2960-8-0x000000001B9D0000-0x000000001BA0E000-memory.dmp

    Filesize

    248KB

  • memory/2960-9-0x00007FFFD7A20000-0x00007FFFD840C000-memory.dmp

    Filesize

    9.9MB

  • memory/2960-10-0x000000001B4B0000-0x000000001B4C0000-memory.dmp

    Filesize

    64KB