Overview

overview

10

Static

static

3

d951b4352f...b4.exe

windows7-x64

10

d951b4352f...b4.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    10-12-2024 01:01

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General

  • Target

    d951b4352f6e4f9ef63cbbabac6cae41d3de37d26dee4b4890d60b52d51ddbb4.exe

  • Size

    3.0MB

  • MD5

    25ae2a8e59da886dbc3192b12e000ffa

  • SHA1

    c384fbee5a29be18571d293c1e20a36d044bd86a

  • SHA256

    d951b4352f6e4f9ef63cbbabac6cae41d3de37d26dee4b4890d60b52d51ddbb4

  • SHA512

    246a2948f880231fe597a4c6cfb1f8acbbc7173f73752532dd2049697cd4165c6d1e966a1a598d260053e1f4aeebf0472ffedc4aec56c8233899c965c7fc6736

  • SSDEEP

    49152:auZju5PuuzE2wJMTFuUPHghJW5eqdCMuWnLBuU5ZHWIcCm:xjuFumw0Fu2gho5e4nLB5L

Score
10/10
quasaroffice04discoveryevasionspywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

45.200.148.155:6060

Mutex

4b3820e0-d123-49d9-b51e-3c4daa4f6874

Attributes
  • encryption_key

    F8879E9B26846C57C99B6F152F74703E1CC15B8B

  • install_name

    SecurityHealthSystray.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    SecurityHealthSystray.exe

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

    trojanspywarequasar
  • Quasar family
    quasar
  • Quasar payload 2 IoCs
  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
    evasion
  • Checks BIOS information in registry 2 TTPs 2 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Identifies Wine through registry keys 2 TTPs 1 IoCs

    Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

    evasion
  • Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 4 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d951b4352f6e4f9ef63cbbabac6cae41d3de37d26dee4b4890d60b52d51ddbb4.exe
    "C:\Users\Admin\AppData\Local\Temp\d951b4352f6e4f9ef63cbbabac6cae41d3de37d26dee4b4890d60b52d51ddbb4.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Identifies Wine through registry keys
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1976
    • C:\Windows\SysWOW64\schtasks.exe
      "schtasks" /create /tn "SecurityHealthSystray.exe" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\SecurityHealthSystray.exe" /rl HIGHEST /f
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2740

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • memory/1976-0-0x0000000000960000-0x00000000010F6000-memory.dmp

    Filesize

    7.6MB

    Download

  • memory/1976-1-0x0000000000960000-0x00000000010F6000-memory.dmp

    Filesize

    7.6MB

    Download

  • memory/1976-2-0x0000000000960000-0x00000000010F6000-memory.dmp

    Filesize

    7.6MB

    Download

  • memory/1976-4-0x0000000000960000-0x00000000010F6000-memory.dmp

    Filesize

    7.6MB

    Download