General

  • Target

    BleachCheat.exe

  • Size

    7.5MB

  • Sample

    240416-bbwekseh9w

  • MD5

    4a8752fcb5b8c322f5387dc92b05cc2f

  • SHA1

    e8c33f6e69aa5bf323801c678bebf4d8af00a474

  • SHA256

    937057dcc1b0772f7169bc46761b73ab2058efd53d9854877370071b9431a447

  • SHA512

    153c2d43b2160d6d601722df3c7ea286eb4f8c836bb77653098f3b5096d92cc7bf8f1637eba25385a5c300e5849d6ca384aba1280acbf490ddd377a595b2572c

  • SSDEEP

    196608:ddgUfWEkm/wQKES+cjTDTqhLkADK4Wi8nqNk:PIQDS+CTSGU4rqNk

Malware Config

Targets

    • Target

      BleachCheat.exe

    • Size

      7.5MB

    • MD5

      4a8752fcb5b8c322f5387dc92b05cc2f

    • SHA1

      e8c33f6e69aa5bf323801c678bebf4d8af00a474

    • SHA256

      937057dcc1b0772f7169bc46761b73ab2058efd53d9854877370071b9431a447

    • SHA512

      153c2d43b2160d6d601722df3c7ea286eb4f8c836bb77653098f3b5096d92cc7bf8f1637eba25385a5c300e5849d6ca384aba1280acbf490ddd377a595b2572c

    • SSDEEP

      196608:ddgUfWEkm/wQKES+cjTDTqhLkADK4Wi8nqNk:PIQDS+CTSGU4rqNk

    • Contains code to disable Windows Defender

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

    • UAC bypass

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

    • 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

    • Obfuscated with Agile.Net obfuscator

      Detects use of the Agile.Net commercial obfuscator, which is capable of entity renaming and control flow obfuscation.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

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

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Virtualization/Sandbox Evasion

1
T1497

Discovery

Query Registry

3
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

4
T1082

Tasks