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Analysis

  • max time kernel
    144s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/11/2024, 05:41

General

  • Target

    mieldaloco12.exe

  • Size

    3.1MB

  • MD5

    4ae7ab9b981922837aae1c86c7f726a3

  • SHA1

    1783e0788fb2a103d71bc9a05ae2fb85c0d70ee9

  • SHA256

    b1b8ad9032b829e2ac3956ce8f302745802cd2d5ae686c700796e2f2ee81b0f7

  • SHA512

    79c4bf39ae1761414b5f37186c2483a4b8755168824d6e783ea9cab26e7c0118f391b6417c622b65ea3ac3924ae745a6abe4838ca1d87671898ad90ae9a18e58

  • SSDEEP

    49152:Cv+lL26AaNeWgPhlmVqvMQ7XSK6v9y/ZBxOPoGdexMTHHB72eh2NT:CvuL26AaNeWgPhlmVqkQ7XSK64/M2

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

Cristopher11sa-62565.portmap.host:62565

Mutex

e51e2b65-e963-4051-9736-67d57ed46798

Attributes
  • encryption_key

    AEA258EF65BF1786F0F767C0BE2497ECC304C46F

  • 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 family
  • 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.

  • 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.

Processes

  • C:\Users\Admin\AppData\Local\Temp\mieldaloco12.exe
    "C:\Users\Admin\AppData\Local\Temp\mieldaloco12.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1296
    • 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:4828
    • 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:2264
      • 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:4220

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3.1MB

    MD5

    4ae7ab9b981922837aae1c86c7f726a3

    SHA1

    1783e0788fb2a103d71bc9a05ae2fb85c0d70ee9

    SHA256

    b1b8ad9032b829e2ac3956ce8f302745802cd2d5ae686c700796e2f2ee81b0f7

    SHA512

    79c4bf39ae1761414b5f37186c2483a4b8755168824d6e783ea9cab26e7c0118f391b6417c622b65ea3ac3924ae745a6abe4838ca1d87671898ad90ae9a18e58

  • memory/1296-0-0x00007FFE30A13000-0x00007FFE30A15000-memory.dmp

    Filesize

    8KB

  • memory/1296-1-0x0000000000560000-0x0000000000884000-memory.dmp

    Filesize

    3.1MB

  • memory/1296-2-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

    Filesize

    10.8MB

  • memory/1296-9-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

    Filesize

    10.8MB

  • memory/2264-10-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

    Filesize

    10.8MB

  • memory/2264-11-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

    Filesize

    10.8MB

  • memory/2264-12-0x000000001B450000-0x000000001B4A0000-memory.dmp

    Filesize

    320KB

  • memory/2264-13-0x000000001BC80000-0x000000001BD32000-memory.dmp

    Filesize

    712KB

  • memory/2264-16-0x000000001BC00000-0x000000001BC12000-memory.dmp

    Filesize

    72KB

  • memory/2264-17-0x000000001C380000-0x000000001C3BC000-memory.dmp

    Filesize

    240KB

  • memory/2264-18-0x00007FFE30A10000-0x00007FFE314D1000-memory.dmp

    Filesize

    10.8MB