Overview

overview

10

Static

static

10

Rebuild.exe

windows10-1703-x64

10

Rebuild.exe

windows10-2004-x64

10

Rebuild.exe

windows11-21h2-x64

10

Sharing

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General

  • Target

    Rebuild.exe

  • Size

    3.1MB

  • Sample

    240421-amn9zadh58

  • MD5

    3eedcddc5146178740acb8f2f03b17c5

  • SHA1

    8825064b4e3780f9f291d1d15bc819bd77f84570

  • SHA256

    76741ecdd14996115907fb61b4727a102321b829f37f027acb5bf6bd9eaf736b

  • SHA512

    23d5f4065a34730a9a3689f3d9141ebf408f324b1f9d01daec78e4e33ae4df5c1a51ca4819c33ea317d95d6862090e5b9a5ace0055a0c54d856ab5f47d05db31

  • SSDEEP

    49152:XvVuf2NUaNmwzPWlvdaKM7ZxTwIydumzGgoGdjTHHB72eh2NT:Xvgf2NUaNmwzPWlvdaB7ZxTwIydN

Score
10/10
quasarslavespywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SLAVE

C2

uk2.localto.net:44425:44425

uk2.localto.net:44425
Mutex

cc0a2b76-665e-4e16-b318-5ee02270fbcd

Attributes
  • encryption_key

    D7F09F1F0B9CECC640BA0B3D8975FBE5CED725B5

  • install_name

    UpdateHost.exe

  • log_directory

    Error Logs

  • reconnect_delay

    3000

  • startup_key

    WOS64

  • subdirectory

    Windows

Targets

    • Target

      Rebuild.exe

    • Size

      3.1MB

    • MD5

      3eedcddc5146178740acb8f2f03b17c5

    • SHA1

      8825064b4e3780f9f291d1d15bc819bd77f84570

    • SHA256

      76741ecdd14996115907fb61b4727a102321b829f37f027acb5bf6bd9eaf736b

    • SHA512

      23d5f4065a34730a9a3689f3d9141ebf408f324b1f9d01daec78e4e33ae4df5c1a51ca4819c33ea317d95d6862090e5b9a5ace0055a0c54d856ab5f47d05db31

    • SSDEEP

      49152:XvVuf2NUaNmwzPWlvdaKM7ZxTwIydumzGgoGdjTHHB72eh2NT:Xvgf2NUaNmwzPWlvdaB7ZxTwIydN

    Score
    10/10
    quasarslavespywaretrojan

    • 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

    behavioral1behavioral2behavioral3

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

2
T1012

System Information Discovery

2
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks