Overview

overview

10

Static

static

10

Client-built.exe

windows10-1703-x64

10

Client-built.exe

windows10-2004-x64

Sharing

Copy URL
Twitter E-mail

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • Sample

    240523-nz8e9sfc96

  • MD5

    97cd39b10b06129cb419a72e1a1827b0

  • SHA1

    d05b2d7cfdf8b12746ffc7a59be36634852390bd

  • SHA256

    6bc108ddb31a255fdd5d1e1047dcd81bc7d7e78c96f7afa9362cecbb0a5b3dbc

  • SHA512

    266d5c0eb0264b82d703d7b5dc22c9e040da239aaca1691f7e193f5391d7bafc441aff3529e42e84421cf80a8d5fca92c2b63019c3a475080744c7f100ea0233

  • SSDEEP

    49152:Kv7I22SsaNYfdPBldt698dBcjH2CRJ6nbR3LoGdDyaTHHB72eh2NT:KvE22SsaNYfdPBldt6+dBcjH2CRJ65T

Score
10/10
quasarromkabootkitpersistencespywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

romka

C2

jozzu420-51305.portmap.host:51305

Mutex

0445c342-b551-411c-9b80-cd437437f491

Attributes
  • encryption_key

    E1BF1D99459F04CAF668F054744BC2C514B0A3D6

  • install_name

    Romilyaa.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows 10 Boot

  • subdirectory

    SubDir

Targets

    • Target

      Client-built.exe

    • Size

      3.1MB

    • MD5

      97cd39b10b06129cb419a72e1a1827b0

    • SHA1

      d05b2d7cfdf8b12746ffc7a59be36634852390bd

    • SHA256

      6bc108ddb31a255fdd5d1e1047dcd81bc7d7e78c96f7afa9362cecbb0a5b3dbc

    • SHA512

      266d5c0eb0264b82d703d7b5dc22c9e040da239aaca1691f7e193f5391d7bafc441aff3529e42e84421cf80a8d5fca92c2b63019c3a475080744c7f100ea0233

    • SSDEEP

      49152:Kv7I22SsaNYfdPBldt698dBcjH2CRJ6nbR3LoGdDyaTHHB72eh2NT:KvE22SsaNYfdPBldt6+dBcjH2CRJ65T

    Score
    10/10
    quasarromkabootkitpersistencespywarestealertrojan

    • 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

    • Reads WinSCP keys stored on the system

      Tries to access WinSCP stored sessions.

      spywarestealer

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

      spywarestealer

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence
    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Scheduled Task/Job

1
T1053

Privilege Escalation

Scheduled Task/Job

1
T1053

Defense Evasion

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Unsecured Credentials

2
T1552

Credentials In Files

1
T1552.001

Credentials in Registry

1
T1552.002

Discovery

Query Registry

3
T1012

System Information Discovery

3
T1082

Peripheral Device Discovery

1
T1120

Lateral Movement

Collection

Data from Local System

2
T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks