Overview

overview

10

Static

static

10

vir.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    vir.exe

  • Size

    312.3MB

  • Sample

    240524-2w77zsed58

  • MD5

    ae35fad90172838912e2b8c89eb8339d

  • SHA1

    6d223c22b1df81eb77608a262fe85f886702e51f

  • SHA256

    58eb428bcff04e7c5811a1cdf97ad44af572897dad76da22c91979ff8c3a9970

  • SHA512

    69419530155a7b13b884a04cad82405c3520eacbb0f2915bab9afdb0f04feb1f39c4bfcbdf86f596ed49aa884e1434f935692ff9c6f5cf686cf0fbc92a214793

  • SSDEEP

    6291456:I2qVJw+odBeWFv1k4R4b0ewZkhT4ofHwJjvZDQPf2tLSkHvdHVeVn:br+WeSWgfecGT4RjvqP85FAh

Score
10/10
djvumassloggernjratquasarumbralromkacollectiondiscoveryevasionexecutionexploitlinkpdfpersistenceransomwarespywarestealertrojanupx

Malware Config

Extracted

Family

quasar

Attributes
  • reconnect_delay

    3000

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

      vir.exe

    • Size

      312.3MB

    • MD5

      ae35fad90172838912e2b8c89eb8339d

    • SHA1

      6d223c22b1df81eb77608a262fe85f886702e51f

    • SHA256

      58eb428bcff04e7c5811a1cdf97ad44af572897dad76da22c91979ff8c3a9970

    • SHA512

      69419530155a7b13b884a04cad82405c3520eacbb0f2915bab9afdb0f04feb1f39c4bfcbdf86f596ed49aa884e1434f935692ff9c6f5cf686cf0fbc92a214793

    • SSDEEP

      6291456:I2qVJw+odBeWFv1k4R4b0ewZkhT4ofHwJjvZDQPf2tLSkHvdHVeVn:br+WeSWgfecGT4RjvqP85FAh

    Score
    10/10
    djvumassloggernjratquasarumbralromkacollectiondiscoveryevasionexecutionexploitpersistenceransomwarespywarestealertrojanupx

    • Detect Umbral payload

    • Djvu Ransomware

      Ransomware which is a variant of the STOP family.

      ransomwaredjvu

    • MassLogger

      Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

      stealerspywaremasslogger

    • MassLogger Main payload

    • Modifies WinLogon for persistence

      persistence

    • Modifies visibility of file extensions in Explorer

      evasion

    • Modifies visiblity of hidden/system files in Explorer

      evasion

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • UAC bypass

      evasiontrojan

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

      stealerumbral

    • Windows security bypass

      evasiontrojan

    • njRAT/Bladabindi

      Widely used RAT written in .NET.

      trojannjrat

    • Blocklisted process makes network request

    • Command and Scripting Interpreter: PowerShell

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Disables RegEdit via registry modification

      evasion

    • Drops file in Drivers directory

    • Manipulates Digital Signatures

      Attackers can apply techniques such as changing the registry keys of authenticode & Cryptography to obtain their binary as valid.

    • Modifies Installed Components in the registry

      persistence

    • Modifies Windows Firewall

      evasion

    • Possible privilege escalation attempt

      exploit

    • .NET Reactor proctector

      Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

      discovery

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Registers COM server for autorun

      persistence

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx

    • Windows security modification

      evasiontrojan

    • Accesses Microsoft Outlook profiles

      collection

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Checks whether UAC is enabled

      evasiontrojan

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

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

    • Modifies WinLogon

      persistence

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

      ransomware

    • Suspicious use of SetThreadContext

    behavioral1

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Command and Scripting Interpreter

2
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Persistence

Boot or Logon Autostart Execution

5
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Winlogon Helper DLL

2
T1547.004

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Privilege Escalation

Boot or Logon Autostart Execution

5
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Winlogon Helper DLL

2
T1547.004

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

12
T1112

Hide Artifacts

3
T1564

Hidden Files and Directories

3
T1564.001

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

4
T1562

Disable or Modify Tools

3
T1562.001

Disable or Modify System Firewall

1
T1562.004

Subvert Trust Controls

1
T1553

SIP and Trust Provider Hijacking

1
T1553.003

File and Directory Permissions Modification

1
T1222

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

7
T1012

System Information Discovery

9
T1082

Peripheral Device Discovery

2
T1120

Remote System Discovery

1
T1018

Lateral Movement

Collection

Data from Local System

1
T1005

Email Collection

1
T1114

Exfiltration

Command and Control

Web Service

1
T1102

Impact

Defacement

1
T1491

Resource Development

Reconnaissance

Tasks