Overview

overview

10

Static

static

10

Client-built.exe

windows7-x64

10

Client-built.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    Client-built.exe

  • Size

    288KB

  • Sample

    240629-2zwy5ayekg

  • MD5

    612513b20674942d2bcf4d0732e0b726

  • SHA1

    26e71467d042ccc4ade033a000a1febac73170d7

  • SHA256

    d0b01d8716df6a5635967566bf4f89daba958ae5689561e956d33f644be14d38

  • SHA512

    ce278631bb21322df5daf5a7b1a8296c2030a1708ec4367e444f9c65138b6f345e79d45138ec24f616b9da94150e82ad4ec3bbcee4282501c7eee568cc50ed8a

  • SSDEEP

    6144:6KJuiyEnCGnhJlMP5Kq+SMv0VGb7bDcllbkUC:pzCGL69zVGkllbkp

Score
10/10
quasaroffice04persistencespywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.0.0

Botnet

Office04

C2

Ratrat2-53904.portmap.host:53904

Mutex

KvGe0Q07bhebNCip9c

Attributes
  • encryption_key

    urBKaVmkbLbNrQbAkgkI

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Steam

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      288KB

    • MD5

      612513b20674942d2bcf4d0732e0b726

    • SHA1

      26e71467d042ccc4ade033a000a1febac73170d7

    • SHA256

      d0b01d8716df6a5635967566bf4f89daba958ae5689561e956d33f644be14d38

    • SHA512

      ce278631bb21322df5daf5a7b1a8296c2030a1708ec4367e444f9c65138b6f345e79d45138ec24f616b9da94150e82ad4ec3bbcee4282501c7eee568cc50ed8a

    • SSDEEP

      6144:6KJuiyEnCGnhJlMP5Kq+SMv0VGb7bDcllbkUC:pzCGL69zVGkllbkp

    Score
    10/10
    quasaroffice04spywaretrojanpersistence

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

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

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks