Overview

overview

10

Static

static

10

Client-built.exe

windows7-x64

10

Client-built.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    135s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    25-10-2024 07:56

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General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    e66da355fd3824d7cb83a1460ccdf7ff

  • SHA1

    e5c00c3fcb2703b7e71e6a39bb6b3fff0d60c938

  • SHA256

    b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca

  • SHA512

    411a983f86bd1eb28326bbe03fdf76146c7acf813051876f00474bc96725d5fae4bc59b527c3ce80a39f9146ad6c4dfee18adc5056ab8ac80e57e4e27fbae856

  • SSDEEP

    49152:KvTI22SsaNYfdPBldt698dBcjH5i5PkoGd9THHB72eh2NT:Kvs22SsaNYfdPBldt6+dBcjH5i5c

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.1.103:4782

Mutex

f71d790f-faf7-4074-a415-aa94634f9a9b

Attributes
  • encryption_key

    9D377AC0024B5DFCC6111678695ABD8EBAF41CD8

  • 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 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 3 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 WriteProcessMemory
    PID:1700
    • 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:1852

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

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

    3.1MB

    MD5

    e66da355fd3824d7cb83a1460ccdf7ff

    SHA1

    e5c00c3fcb2703b7e71e6a39bb6b3fff0d60c938

    SHA256

    b99db344c7736d6670081a4aa48a62b2ea3566b2e665413c5c0fbbcf43f8c9ca

    SHA512

    411a983f86bd1eb28326bbe03fdf76146c7acf813051876f00474bc96725d5fae4bc59b527c3ce80a39f9146ad6c4dfee18adc5056ab8ac80e57e4e27fbae856

    Download Submit

  • memory/1700-0-0x000007FEF6343000-0x000007FEF6344000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1700-1-0x0000000000B50000-0x0000000000E74000-memory.dmp

    Filesize

    3.1MB

    Download

  • memory/1700-2-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/1700-7-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/1852-9-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/1852-8-0x00000000001B0000-0x00000000004D4000-memory.dmp

    Filesize

    3.1MB

    Download

  • memory/1852-10-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

    Filesize

    9.9MB

    Download

  • memory/1852-11-0x000007FEF6340000-0x000007FEF6D2C000-memory.dmp

    Filesize

    9.9MB

    Download