Overview

overview

10

Static

static

10

Release (1).rar

windows7-x64

3

Release (1).rar

windows10-2004-x64

3

Guna.UI2.dll

windows7-x64

1

Guna.UI2.dll

windows10-2004-x64

1

IDTOIPBYR_0.deps.json

windows7-x64

3

IDTOIPBYR_0.deps.json

windows10-2004-x64

3

IDTOIPBYR_0.exe

windows7-x64

10

IDTOIPBYR_0.exe

windows10-2004-x64

10

IDTOIPBYR_0.exe

windows7-x64

10

IDTOIPBYR_0.exe

windows10-2004-x64

10

IDTOIPBYR_0.pdb

windows7-x64

3

IDTOIPBYR_0.pdb

windows10-2004-x64

3

IDTOIPBYR_...g.json

windows7-x64

3

IDTOIPBYR_...g.json

windows10-2004-x64

3

System.Management.dll

windows7-x64

1

System.Management.dll

windows10-2004-x64

1

Sharing

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General

  • Target
    Release (1).rar
  • Size 2.1MB
  • Sample240428-ac5tzabe55
  • SHA256 8904d96a473dd52cd5255e046d47148eb27cc778395fff4f220bbb9509f643d8
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
agentteslaquasaroffice04spywaretrojan

Malware Config

Extracted

Family

  • quasar

Version

  • 3.1.5

Botnet

  • Office04

C2

  • 147.185.221.19:33587

Mutex

  • $Sxr-lG7PreqFKmNhJc0CKS

Attributes
  • encryption_key

    11fnZjAdVB1EIQVhl7wn

  • install_name

    DLLrunhost.exe

  • log_directory

    UpdLogs

  • reconnect_delay

    3000

  • startup_key

    WindowsAudioHelper

  • subdirectory

    Windows

Targets

    • Target
      Release (1).rar
    • Size 2.1MB
    • SHA256 8904d96a473dd52cd5255e046d47148eb27cc778395fff4f220bbb9509f643d8
    • MD5 SHA1 SHA512 SSDEEP
    Score
    3/10
    behavioral1behavioral2
    • Target
      Guna.UI2.dll
    • Size 2.1MB
    • SHA256 3ac70532408b89159bfe235d4ed228faa03ae3fbd63ec6a82d895f287a3b0579
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10
    behavioral3behavioral4
    • Target
      IDTOIPBYR_0.deps.json
    • Size 2KB
    • SHA256 56ab1b179ec0bafceca428c50b5a887c0708914e68c2c1e8c120811215890724
    • MD5 SHA1 SHA512
    Score
    3/10
    behavioral5behavioral6
    • Target
      IDTOIPBYR_0.dll
    • Size 38KB
    • SHA256 c924d7502dcf3af74739270218066f0431678e122fa35aefefdacc1edd2b1b0c
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Looks up external IP address via web service

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

    behavioral7behavioral8
    • Target
      IDTOIPBYR_0.exe
    • Size 413KB
    • SHA256 4466cd4392c0fa3c49979664630db1b607e129c858fd44507cf5fc6b5b9dd3ba
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    quasaroffice04spywaretrojan

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • Drops file in Drivers directory

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Looks up external IP address via web service

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

    behavioral10behavioral9
    • Target
      IDTOIPBYR_0.pdb
    • Size 17KB
    • SHA256 664257f7eaea44c12ce83162d278a046cbdc743c21d68ceddb551f7ff7fa030f
    • MD5 SHA1 SHA512 SSDEEP
    Score
    3/10
    behavioral11behavioral12
    • Target
      IDTOIPBYR_0.runtimeconfig.json
    • Size 458B
    • SHA256 c71152bf25e40d647b2440c5b39be157a3d356106be9d5b678ab97bb87b4e782
    • MD5 SHA1 SHA512
    Score
    3/10
    behavioral13behavioral14
    • Target
      System.Management.dll
    • Size 72KB
    • SHA256 f515ca5c944c332ab706ff0a7c2e53e66d0d9d8a663e9b2691b35129ee22559b
    • MD5 SHA1 SHA512 SSDEEP
    Score
    1/10
    behavioral15behavioral16

MITRE ATT&CK Enterprise v15

Tasks