Analysis

  • max time kernel
    126s
  • max time network
    136s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    13-02-2025 04:01

General

  • Target

    539da6b5b3b6974ab6003783ec1bee822e90f4732661818400239ffda7c62f91.exe

  • Size

    348KB

  • MD5

    43d1f9e4fd0356376bda350486b75335

  • SHA1

    4f07cfcbfd3071d55f9098ba8905f97b2eb23b01

  • SHA256

    539da6b5b3b6974ab6003783ec1bee822e90f4732661818400239ffda7c62f91

  • SHA512

    22d0c8fb67af6360bc44ae740638f120c8eb02df1a831a541c411509b12b2e5af2dfcb8013e06b92540ddaa5e901f92489e504ef98f966a226de18de11addb13

  • SSDEEP

    6144:d2NHXf500MwdHFPmtH42bp5EGISxBDz4myHfi:kd50GHFPHU5ESxBDcmy/i

Malware Config

Extracted

Family

quasar

Version

1.3.0.0

Botnet

Office04

C2

217.195.197.192:1604

Mutex

iG5Qu7mo7JWZRWS2JY

Attributes
  • encryption_key

    f8ffk4jC3Ygnfr2GgGiB

  • 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 1 IoCs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\539da6b5b3b6974ab6003783ec1bee822e90f4732661818400239ffda7c62f91.exe
    "C:\Users\Admin\AppData\Local\Temp\539da6b5b3b6974ab6003783ec1bee822e90f4732661818400239ffda7c62f91.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    PID:2500

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/2500-0-0x00000000742DE000-0x00000000742DF000-memory.dmp

    Filesize

    4KB

  • memory/2500-1-0x0000000001260000-0x00000000012BE000-memory.dmp

    Filesize

    376KB

  • memory/2500-2-0x00000000742D0000-0x00000000749BE000-memory.dmp

    Filesize

    6.9MB

  • memory/2500-4-0x00000000742DE000-0x00000000742DF000-memory.dmp

    Filesize

    4KB

  • memory/2500-5-0x00000000742D0000-0x00000000749BE000-memory.dmp

    Filesize

    6.9MB