Overview

overview

10

Static

static

10

Oski Cracked.exe

windows7-x64

10

Oski Cracked.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    Oski Cracked.exe

  • Size

    4.7MB

  • Sample

    240405-tfamsagc51

  • MD5

    fae4c2fc795b054c80d57ad600f8447f

  • SHA1

    94ef84328a4c1c864307870d8e98cc4b6d334dd5

  • SHA256

    579e9d2e534610d36fa6073b825f8caffc41f1f20dad0cfd1749ca12d202a11c

  • SHA512

    35da6d3abc97cea70fb573d45f5bd528f5550d478a464f40dd1455f453c65a16283d3a5106aa9e488d3674db5d0ec7009a0cfd30d026afc4220e829f32075be9

  • SSDEEP

    98304:PahEJCbuSMburCaMZh0yEKj+WRvrY1dcZ048HV/bFy8jJ7LUdVmi:PahmmMbuQZlFY7KsZPNLUdQ

Score
10/10
oskiquasarvenomratzgratwindows securityevasioninfostealerpersistenceratrootkitspywarestealertrojan

Malware Config

Extracted

Family

quasar

Version

2.1.0.0

Botnet

Windows Security

C2

23.105.131.187:7812

Mutex

VNM_MUTEX_CXpgUhDot7jvhF7S9O

Attributes
  • encryption_key

    1mVKopYcKhmQLOzLUk5T

  • install_name

    Windows Security.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows Update Service

  • subdirectory

    SubDir

Extracted

Family

oski

C2

107.180.3.147

Targets

    • Target

      Oski Cracked.exe

    • Size

      4.7MB

    • MD5

      fae4c2fc795b054c80d57ad600f8447f

    • SHA1

      94ef84328a4c1c864307870d8e98cc4b6d334dd5

    • SHA256

      579e9d2e534610d36fa6073b825f8caffc41f1f20dad0cfd1749ca12d202a11c

    • SHA512

      35da6d3abc97cea70fb573d45f5bd528f5550d478a464f40dd1455f453c65a16283d3a5106aa9e488d3674db5d0ec7009a0cfd30d026afc4220e829f32075be9

    • SSDEEP

      98304:PahEJCbuSMburCaMZh0yEKj+WRvrY1dcZ048HV/bFy8jJ7LUdVmi:PahmmMbuQZlFY7KsZPNLUdQ

    Score
    10/10
    oskiquasarvenomratwindows securityevasioninfostealerpersistenceratrootkitspywarestealertrojan

    • Contains code to disable Windows Defender

      A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

    • Modifies Windows Defender Real-time Protection settings

      evasiontrojan

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

      infostealeroski

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

      trojanspywarequasar

    • Quasar payload

    • VenomRAT

      VenomRAT is a modified version of QuasarRAT with some added features, such as rootkit and stealer capabilites.

      ratrootkitstealervenomrat

    • Checks computer location settings

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

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Windows security modification

      evasiontrojan

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Scheduled Task/Job

1
T1053

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

4
T1112

Impair Defenses

2
T1562

Disable or Modify Tools

2
T1562.001

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Remote System Discovery

1
T1018

Lateral Movement

Collection

Data from Local System

1
T1005

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks