Overview

overview

10

Static

static

10

a92b1b7ad4...26.exe

windows7-x64

10

a92b1b7ad4...26.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240611-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-07-2024 06:25

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General

  • Target

    a92b1b7ad45113f22a22e554d3b0521b2d1c10528ff6d541836cac16c0eddc26.exe

  • Size

    3.1MB

  • MD5

    8499a3b1d99e207ebebbb8baafa0da1e

  • SHA1

    df21c8f1385a708fd6d142db3c4af2f1417a4aa1

  • SHA256

    a92b1b7ad45113f22a22e554d3b0521b2d1c10528ff6d541836cac16c0eddc26

  • SHA512

    254362c9ca87f5dbd40578a26b8b3e44bc09d86d7f2351e46a8e7559d3d865b993d08d42c68b53222f713adf812b4a7ad32204c6f5a24e6eb59b718ff36dd8c5

  • SSDEEP

    98304:Sv462XlaSFNWPjljiFXRoUYIwxj1uZsvi:UwZY5M6

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.6:4782

Mutex

7e39441d-bf3c-4e76-b218-17218a11a5ae

Attributes
  • encryption_key

    4228EF6C98C943B084BBAB0B946094AB34DE7807

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Win32

  • 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 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\a92b1b7ad45113f22a22e554d3b0521b2d1c10528ff6d541836cac16c0eddc26.exe
    "C:\Users\Admin\AppData\Local\Temp\a92b1b7ad45113f22a22e554d3b0521b2d1c10528ff6d541836cac16c0eddc26.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2704
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Win32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4732
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4540
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Win32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3112

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

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Downloads

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

    3.1MB

    MD5

    8499a3b1d99e207ebebbb8baafa0da1e

    SHA1

    df21c8f1385a708fd6d142db3c4af2f1417a4aa1

    SHA256

    a92b1b7ad45113f22a22e554d3b0521b2d1c10528ff6d541836cac16c0eddc26

    SHA512

    254362c9ca87f5dbd40578a26b8b3e44bc09d86d7f2351e46a8e7559d3d865b993d08d42c68b53222f713adf812b4a7ad32204c6f5a24e6eb59b718ff36dd8c5

    Download Submit
  • memory/2704-0-0x00007FFCEE8A3000-0x00007FFCEE8A5000-memory.dmp
    Filesize

    8KB

    Download
  • memory/2704-1-0x0000000000B20000-0x0000000000E44000-memory.dmp
    Filesize

    3.1MB

    Download
  • memory/2704-2-0x00007FFCEE8A0000-0x00007FFCEF361000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/2704-10-0x00007FFCEE8A0000-0x00007FFCEF361000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4540-9-0x00007FFCEE8A0000-0x00007FFCEF361000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4540-11-0x00007FFCEE8A0000-0x00007FFCEF361000-memory.dmp
    Filesize

    10.8MB

    Download
  • memory/4540-12-0x000000001B970000-0x000000001B9C0000-memory.dmp
    Filesize

    320KB

    Download
  • memory/4540-13-0x000000001C2D0000-0x000000001C382000-memory.dmp
    Filesize

    712KB

    Download
  • memory/4540-14-0x00007FFCEE8A0000-0x00007FFCEF361000-memory.dmp
    Filesize

    10.8MB

    Download