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Overview

overview

10

Static

static

10

Bloom Reducer.exe

windows7-x64

10

Bloom Reducer.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    Bloom Reducer.exe

  • Size

    502KB

  • Sample

    250323-efc1ksyvfv

  • MD5

    df5da5f129d8b2b9ebcadd00f88da030

  • SHA1

    afe7fbc6c2462fcdab5edfb40db828297832b5ea

  • SHA256

    3e77ae72af3f9a18de88cb41b6686253d5b20e2ed215a26217b96520415db1d5

  • SHA512

    6832b2c35b367190ba4a4eb8ac54476c63836321c8d77089c86c6b2016dba6badd4d6555ec450433a572b7b3b8388f2b4b793e720f859ddf8e6db2b5b8d21fac

  • SSDEEP

    6144:wTEgdc0YhebGbXOsA6j1RdhHudPSBlh/nKRFwQHocEP0b8F96y24GkficTR3u:wTEgdfY5A6PukGFwffUy24ficdu

Score
10/10
quasaroffice04discoveryspywaretrojan

Malware Config

Extracted

Family

quasar

Version

1.4.0

Botnet

Office04

C2

chaarlie-44115.portmap.host:44115

Mutex

ba91e72b-9fea-40fe-830d-df56f58d0810

Attributes
  • encryption_key

    6B1195D9FAF0B46710DC1B441D5B78F5F750CCC8

  • install_name

    bloom reducer.exe

  • log_directory

    Logs

  • reconnect_delay

    1000

  • startup_key

    system32

  • subdirectory

    SubDir

Targets

    • Target

      Bloom Reducer.exe

    • Size

      502KB

    • MD5

      df5da5f129d8b2b9ebcadd00f88da030

    • SHA1

      afe7fbc6c2462fcdab5edfb40db828297832b5ea

    • SHA256

      3e77ae72af3f9a18de88cb41b6686253d5b20e2ed215a26217b96520415db1d5

    • SHA512

      6832b2c35b367190ba4a4eb8ac54476c63836321c8d77089c86c6b2016dba6badd4d6555ec450433a572b7b3b8388f2b4b793e720f859ddf8e6db2b5b8d21fac

    • SSDEEP

      6144:wTEgdc0YhebGbXOsA6j1RdhHudPSBlh/nKRFwQHocEP0b8F96y24GkficTR3u:wTEgdfY5A6PukGFwffUy24ficdu

    Score
    10/10
    quasaroffice04discoveryspywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar family

      quasar

    • Quasar payload

    • Checks computer location settings

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

    • Executes dropped EXE

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks