Overview

overview

10

Static

static

10

api-ms-win...-0.exe

windows7-x64

10

api-ms-win...-0.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    api-ms-win-crt-environment-l1-1-0.exe

  • Size

    3.1MB

  • Sample

    240112-rjslnaabh9

  • MD5

    8c1e7d74c62a687a236a3262f09269d4

  • SHA1

    896a403897661d3834f540a10678463f4ef4c81d

  • SHA256

    9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef

  • SHA512

    85f98c7c311c224043a588180ff170290b6e5cffc78edb77cbfbc8bfc662d34b17c7f9a6a9708f769398854284b98e9d14d45229b2f74c19ce52481f4887bc24

  • SSDEEP

    49152:Pv1A62jiaQDKwPFlJn3xFQsZQOdmRJ6abR3LoGdMoTHHB72eh2NT:Pve62jiaQDKwPFlJn3TQsZQOdmRJ60

Score
10/10
quasarsvchostspywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

svchost

C2

szczurson1337.freemyip.com:63027

Mutex

480dd827-793e-49b8-b01d-ed2623e7d90a

Attributes
  • encryption_key

    6891155C128F5ED55194A86C4A5AB7A3EE3E2C5B

  • install_name

    api-ms-win-crt-environment-l1-0-1.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    api-ms-win-crt-environment-l1-1-0

  • subdirectory

    downlevel

Targets

    • Target

      api-ms-win-crt-environment-l1-1-0.exe

    • Size

      3.1MB

    • MD5

      8c1e7d74c62a687a236a3262f09269d4

    • SHA1

      896a403897661d3834f540a10678463f4ef4c81d

    • SHA256

      9e6fa1f280864e2933528e17984bf2d448b003bda842145f34e63cc8a4b337ef

    • SHA512

      85f98c7c311c224043a588180ff170290b6e5cffc78edb77cbfbc8bfc662d34b17c7f9a6a9708f769398854284b98e9d14d45229b2f74c19ce52481f4887bc24

    • SSDEEP

      49152:Pv1A62jiaQDKwPFlJn3xFQsZQOdmRJ6abR3LoGdMoTHHB72eh2NT:Pve62jiaQDKwPFlJn3TQsZQOdmRJ60

    Score
    10/10
    quasarsvchostspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Executes dropped EXE

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Scheduled Task/Job

1
T1053

Privilege Escalation

Scheduled Task/Job

1
T1053

Defense Evasion

Credential Access

Discovery

Query Registry

1
T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks