Overview

overview

10

Static

static

3

clienttdl.exe

windows7-x64

10

clienttdl.exe

windows10-2004-x64

7

Sharing

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General

  • Target

    clienttdl.exe

  • Size

    4KB

  • Sample

    240430-d9dcrsca7s

  • MD5

    17d8bf8bce96dde9e44d1d610778e963

  • SHA1

    21ae4d732a12379749a2f2cb25a60305d68fcc05

  • SHA256

    a69daec480a6a18ca22d6acdaa79bf8a1f870b7fab8e38dd4fbf7cdcb530eba5

  • SHA512

    8537744a4cd3fc4785c27c0a0b703b998152d564db5e2482c94bc9654ad411b40f765078b4b427c671c95ad8dcebf7ebf194ee71ec9db3bf6115cbc136db48e6

  • SSDEEP

    96:x+d8EY6Rfd74DHd69sxfNp9nxfpnJd3ojDrl:guEY6Rfd74D969sl9n7nJd+

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

93.123.85.108:4782

Mutex

e14b8f59-979b-4ebf-8602-dd3c4d6c301e

Attributes
  • encryption_key

    534734397C0FA9A1D28F061AD75DF4100BFF5787

  • install_name

    Msconfig.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    msconfig.exe

  • subdirectory

    SubDir

Targets

    • Target

      clienttdl.exe

    • Size

      4KB

    • MD5

      17d8bf8bce96dde9e44d1d610778e963

    • SHA1

      21ae4d732a12379749a2f2cb25a60305d68fcc05

    • SHA256

      a69daec480a6a18ca22d6acdaa79bf8a1f870b7fab8e38dd4fbf7cdcb530eba5

    • SHA512

      8537744a4cd3fc4785c27c0a0b703b998152d564db5e2482c94bc9654ad411b40f765078b4b427c671c95ad8dcebf7ebf194ee71ec9db3bf6115cbc136db48e6

    • SSDEEP

      96:x+d8EY6Rfd74DHd69sxfNp9nxfpnJd3ojDrl:guEY6Rfd74D969sl9n7nJd+

    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • 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

2
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks