Overview

overview

10

Static

static

10

quasarxd.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    2s
  • max time network
    35s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01-07-2024 19:20

Sharing

Copy URL
Twitter E-mail
Report Analysis Logs

General

  • Target

    quasarxd.exe

  • Size

    3.1MB

  • MD5

    909b167a9c99759a1203f4a27f805112

  • SHA1

    203d46833ece9748e3875ffefbd5b268f0ec9b64

  • SHA256

    862bd4762dc753d859ac15ae2c79d99c9b4f637a52d5ddfe5ed30dda1135b60b

  • SHA512

    1405563bc6e3c61205ac8c39e603f2befcb1e48c5d3316aec5235e80d64d5b5cd3c2ea989eb1471ac69c7b0503bcfd9e95e9c66b11eb661f46bb2802995adcaf

  • SSDEEP

    49152:fvyI22SsaNYfdPBldt698dBcjHhqx71v4LoGy5cSVTHHB72eh2NT:fvf22SsaNYfdPBldt6+dBcjHhqxU

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.117:4782

Mutex

d4f509cf-7da3-4c4c-9cfd-174cb5da47fa

Attributes
  • encryption_key

    99DD0129158FA6F5C116037512C574C2595B28C3

  • 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.

    trojanspywarequasar
  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\quasarxd.exe
    "C:\Users\Admin\AppData\Local\Temp\quasarxd.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:116
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:3492
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:3092
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1244

Network

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Credential Access

Discovery

Query Registry

1
T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
    Filesize

    3.1MB

    MD5

    909b167a9c99759a1203f4a27f805112

    SHA1

    203d46833ece9748e3875ffefbd5b268f0ec9b64

    SHA256

    862bd4762dc753d859ac15ae2c79d99c9b4f637a52d5ddfe5ed30dda1135b60b

    SHA512

    1405563bc6e3c61205ac8c39e603f2befcb1e48c5d3316aec5235e80d64d5b5cd3c2ea989eb1471ac69c7b0503bcfd9e95e9c66b11eb661f46bb2802995adcaf

    Download Submit
  • memory/116-0-0x00007FFB95F03000-0x00007FFB95F05000-memory.dmp
    Filesize

    8KB

    Download
  • memory/116-1-0x0000000000B20000-0x0000000000E44000-memory.dmp
    Filesize

    3.1MB

    Download
  • memory/116-2-0x00007FFB95F00000-0x00007FFB969C1000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/116-10-0x00007FFB95F00000-0x00007FFB969C1000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/3092-9-0x00007FFB95F00000-0x00007FFB969C1000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/3092-11-0x00007FFB95F00000-0x00007FFB969C1000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/3092-12-0x000000001C150000-0x000000001C1A0000-memory.dmp
    Filesize

    320KB

    Download
  • memory/3092-13-0x000000001C260000-0x000000001C312000-memory.dmp
    Filesize

    712KB

    Download
  • memory/3092-14-0x00007FFB95F00000-0x00007FFB969C1000-memory.dmp
    Filesize

    10.8MB

    Download