Overview

overview

10

Static

static

10

4833f6e7b2...3c.exe

windows7-x64

10

4833f6e7b2...3c.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c.exe

  • Size

    3.1MB

  • Sample

    240617-bg88maxbpa

  • MD5

    35dea5908c411c55232760a766992b4d

  • SHA1

    803e87e294445707b2480e0f6eeb21990be7522e

  • SHA256

    4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c

  • SHA512

    37f37e706d7ba27a00d06f5d30ba881b3cf606a74b0472a404e76acad17e446cf22bdcddbe5b79fa73f457302c028aca46e971a97543d3d1784c2393bff91631

  • SSDEEP

    49152:DvrI22SsaNYfdPBldt698dBcjHCdHLoGdgTHHB72eh2NT:DvU22SsaNYfdPBldt6+dBcjHCdr

Score
10/10
quasaroffice04spywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

hvhkcutuoujbobu672-22209.portmap.host:22209

Mutex

979a24d1-1ef3-4416-baf8-bf96d2280aed

Attributes
  • encryption_key

    E634ECEC5FEC379E441CB9B04C771BAC550131B0

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    service 32

  • subdirectory

    SubDir

Targets

    • Target

      4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c.exe

    • Size

      3.1MB

    • MD5

      35dea5908c411c55232760a766992b4d

    • SHA1

      803e87e294445707b2480e0f6eeb21990be7522e

    • SHA256

      4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c

    • SHA512

      37f37e706d7ba27a00d06f5d30ba881b3cf606a74b0472a404e76acad17e446cf22bdcddbe5b79fa73f457302c028aca46e971a97543d3d1784c2393bff91631

    • SSDEEP

      49152:DvrI22SsaNYfdPBldt698dBcjHCdHLoGdgTHHB72eh2NT:DvU22SsaNYfdPBldt6+dBcjHCdr

    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Detects Windows executables referencing non-Windows User-Agents

    • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

    • Detects executables containing common artifacts observed in infostealers

    • Checks computer location settings

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

    • Executes dropped EXE

    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

Remote System Discovery

1
T1018

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks