General

  • Target

    SolaraB.zip

  • Size

    5KB

  • Sample

    240524-r6s6psaa32

  • MD5

    4ec8143b6dbe27870cf8333711ff5096

  • SHA1

    693d467ebec348469011ffef1bd370b113653147

  • SHA256

    2510be907ec476e8375ac7b5431536ae9a32bf99fe77ab695a5100852b111b96

  • SHA512

    b513d2b9c63d999ccf459cea625bfdc481e44f0f3222996182a0d0d89fdb97ed754b927c7a429e43b96f13d2fc73e2860edca78b162a41101ae97e1a0f4e054e

  • SSDEEP

    96:Kb43b11j3vs+ieHBgcCXhzWYQ1NJGQ7S8SnV8xT/KiFlg5YNwMHv5F:Kb4rEKhgcghDY4Q7WV8t/VG1o

Malware Config

Targets

    • Target

      SolaraB/Solara/SolaraBootstrapper.exe

    • Size

      13KB

    • MD5

      6557bd5240397f026e675afb78544a26

    • SHA1

      839e683bf68703d373b6eac246f19386bb181713

    • SHA256

      a7fecfc225dfdd4e14dcd4d1b4ba1b9f8e4d1984f1cdd8cda3a9987e5d53c239

    • SHA512

      f2399d34898a4c0c201372d2dd084ee66a66a1c3eae949e568421fe7edada697468ef81f4fcab2afd61eaf97bcb98d6ade2d97295e2f674e93116d142e892e97

    • SSDEEP

      192:konexQO0FoAWyEfJkVIaqaLHmr/XKT0ifnTJ1jvVXctNjA:HnexHAWyEfJoIaqayzKAifd1LVEj

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

    • Downloads MZ/PE file

    • Modifies Installed Components in the registry

    • Sets file execution options in registry

    • Checks BIOS information in registry

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Registers COM server for autorun

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • 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

    • Installs/modifies Browser Helper Object

      BHOs are DLL modules which act as plugins for Internet Explorer.

    • Legitimate hosting services abused for malware hosting/C2

    • Checks system information in the registry

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

    • Drops file in System32 directory

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

4
T1547.001

Browser Extensions

1
T1176

Privilege Escalation

Boot or Logon Autostart Execution

4
T1547

Registry Run Keys / Startup Folder

4
T1547.001

Defense Evasion

Virtualization/Sandbox Evasion

1
T1497

Modify Registry

6
T1112

Discovery

Query Registry

6
T1012

Virtualization/Sandbox Evasion

1
T1497

System Information Discovery

5
T1082

Command and Control

Web Service

1
T1102

Tasks