General

  • Target

    SubZero_Tweaking.exe

  • Size

    856KB

  • Sample

    231007-sfwpksdd8t

  • MD5

    fc637380cbf974be1adb44a6a5bd1376

  • SHA1

    fa0a8695c49497824a203a1bc0aadbb09acdec01

  • SHA256

    3e032a34d67f6f9f46be4359ce624d3a4d9af64aab2b17d872e8b56bee2edacf

  • SHA512

    3b7b394c7e2a2389bf59e1e3d3adaa408fd3ca19bc903a35036d7fece719ebc1ddeaaeef28c1c18027ca9607f2570637a59e5e97ece0df2c5da48b29c12b2493

  • SSDEEP

    12288:LOm2t4WwFJM6cLeXAdv/x66v/wY1K8Zsnq2uZ0hQkP2ypcCHrHL3UJlqWWRuK9ow:64fcL//I6v4Y1Zu52y9/EGWWv9ohS

Malware Config

Targets

    • Target

      SubZero_Tweaking.exe

    • Size

      856KB

    • MD5

      fc637380cbf974be1adb44a6a5bd1376

    • SHA1

      fa0a8695c49497824a203a1bc0aadbb09acdec01

    • SHA256

      3e032a34d67f6f9f46be4359ce624d3a4d9af64aab2b17d872e8b56bee2edacf

    • SHA512

      3b7b394c7e2a2389bf59e1e3d3adaa408fd3ca19bc903a35036d7fece719ebc1ddeaaeef28c1c18027ca9607f2570637a59e5e97ece0df2c5da48b29c12b2493

    • SSDEEP

      12288:LOm2t4WwFJM6cLeXAdv/x66v/wY1K8Zsnq2uZ0hQkP2ypcCHrHL3UJlqWWRuK9ow:64fcL//I6v4Y1Zu52y9/EGWWv9ohS

    • 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

    • UAC bypass

    • XenArmor Suite

      XenArmor is as suite of password recovery tools for various application.

    • Modifies Installed Components in the registry

    • Modifies Windows Firewall

    • Sets DLL path for service in the registry

    • ACProtect 1.3x - 1.4x DLL software

      Detects file using ACProtect software.

    • Allows Network login with blank passwords

      Allows local user accounts with blank passwords to access device from the network.

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads local data of messenger clients

      Infostealers often target stored data of messaging applications, which can include saved credentials and account information.

    • Reads user/profile data of local email clients

      Email clients store some user data on disk where infostealers will often target it.

    • Reads user/profile data of web browsers

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

    • UPX packed file

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

    • Uses the VBS compiler for execution

    • Accesses Microsoft Outlook accounts

    • Adds Run key to start application

    • Drops desktop.ini file(s)

    • Enumerates connected drives

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

    • Looks up external IP address via web service

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

    • Modifies WinLogon

    • Drops file in System32 directory

    • Sets desktop wallpaper using registry

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scripting

1
T1064

Scheduled Task/Job

1
T1053

Persistence

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Privilege Escalation

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

3
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

11
T1112

Impair Defenses

2
T1562

Disable or Modify Tools

2
T1562.001

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Scripting

1
T1064

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

Unsecured Credentials

4
T1552

Credentials In Files

4
T1552.001

Discovery

Query Registry

6
T1012

System Information Discovery

6
T1082

Peripheral Device Discovery

2
T1120

Lateral Movement

Remote Services

1
T1021

Remote Desktop Protocol

1
T1021.001

Collection

Data from Local System

4
T1005

Email Collection

1
T1114

Impact

Defacement

1
T1491

Tasks