General

  • Target

    f6bfa172fb2a124980f8134f6b5c765e7af52133a0c828e87d05b40a1a3f5005

  • Size

    789KB

  • Sample

    240425-kgwrzahb56

  • MD5

    8026082d59bac905bcc4098c69b98743

  • SHA1

    5c8bffce653aa3b6c3e14d5f02927648b5ca8768

  • SHA256

    f6bfa172fb2a124980f8134f6b5c765e7af52133a0c828e87d05b40a1a3f5005

  • SHA512

    304339d26694f1225a23014862676f759c9332ea43ab53c9cb665346228dbed5ece4dca5e41b4d577fdf18ea70f7c61cda852e5122a7fbcf3bdfec5acc0f9f42

  • SSDEEP

    12288:UsP3NrvWMBOyImjR4rrRyimS3lE28kNp6MARWch8kMp5okT23gvub5mqn6Ec0Lhy:UsP3NrvW31m9Ysd9lgvu4q6EgtOt3F3u

Malware Config

Targets

    • Target

      f6bfa172fb2a124980f8134f6b5c765e7af52133a0c828e87d05b40a1a3f5005

    • Size

      789KB

    • MD5

      8026082d59bac905bcc4098c69b98743

    • SHA1

      5c8bffce653aa3b6c3e14d5f02927648b5ca8768

    • SHA256

      f6bfa172fb2a124980f8134f6b5c765e7af52133a0c828e87d05b40a1a3f5005

    • SHA512

      304339d26694f1225a23014862676f759c9332ea43ab53c9cb665346228dbed5ece4dca5e41b4d577fdf18ea70f7c61cda852e5122a7fbcf3bdfec5acc0f9f42

    • SSDEEP

      12288:UsP3NrvWMBOyImjR4rrRyimS3lE28kNp6MARWch8kMp5okT23gvub5mqn6Ec0Lhy:UsP3NrvW31m9Ysd9lgvu4q6EgtOt3F3u

    • Glupteba

      Glupteba is a modular loader written in Golang with various components.

    • Glupteba payload

    • Modifies firewall policy service

    • Stealc

      Stealc is an infostealer written in C++.

    • UAC bypass

    • Windows security bypass

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Drops startup file

    • 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.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • UPX packed file

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

    • Windows security modification

    • Adds Run key to start application

    • Checks installed software on the system

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

    • Checks whether UAC is enabled

    • Drops Chrome extension

    • Drops desktop.ini file(s)

    • 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.

    • Manipulates WinMonFS driver.

      Roottkits write to WinMonFS to hide directories/files from being detected.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Matrix ATT&CK v13

Execution

Scheduled Task/Job

1
T1053

Persistence

Create or Modify System Process

2
T1543

Windows Service

2
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

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

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Defense Evasion

Modify Registry

7
T1112

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

Virtualization/Sandbox Evasion

1
T1497

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Query Registry

8
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

8
T1082

Peripheral Device Discovery

2
T1120

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks