General

  • Target

    barbiegamer - Linkvertise Downloader_5DnBA-1.exe

  • Size

    10.8MB

  • Sample

    230908-jv77gshh85

  • MD5

    fc30f38c629fbafcfd1f4a4895814c46

  • SHA1

    e6b298591f7034463f603ede1573c8a198938b7f

  • SHA256

    40e1b53fb04746ac4a0561f5ab781291069b90232215afc36320263308a28ec9

  • SHA512

    74aba9bd29a9d6200f5b35a15f66c6edb57b3a8cfa24b3c04f2a90224d64bcda7564047a5f88698107aaf5e18c6d22bc6d8f5f3fdfdda2bb86aeb800d90e37d2

  • SSDEEP

    196608:w38JJEU16hTZl583S0LJu+mzfDkzXJKUNWGJ3k2ZoXOM1ugha:Z1MlCC0Ybzf4zZKUok5oXN8x

Malware Config

Targets

    • Target

      barbiegamer - Linkvertise Downloader_5DnBA-1.exe

    • Size

      10.8MB

    • MD5

      fc30f38c629fbafcfd1f4a4895814c46

    • SHA1

      e6b298591f7034463f603ede1573c8a198938b7f

    • SHA256

      40e1b53fb04746ac4a0561f5ab781291069b90232215afc36320263308a28ec9

    • SHA512

      74aba9bd29a9d6200f5b35a15f66c6edb57b3a8cfa24b3c04f2a90224d64bcda7564047a5f88698107aaf5e18c6d22bc6d8f5f3fdfdda2bb86aeb800d90e37d2

    • SSDEEP

      196608:w38JJEU16hTZl583S0LJu+mzfDkzXJKUNWGJ3k2ZoXOM1ugha:Z1MlCC0Ybzf4zZKUok5oXN8x

    • Cobalt Strike reflective loader

      Detects the reflective loader used by Cobalt Strike.

    • Cobaltstrike

      Detected malicious payload which is part of Cobaltstrike.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • CoreEntity .NET Packer

      A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

    • Creates new service(s)

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • 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.

    • 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.

    • Registers COM server for autorun

    • Adds Run key to start application

    • Checks for any installed AV software in registry

    • Checks installed software on the system

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

    • Enumerates connected drives

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

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Privilege Escalation

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Defense Evasion

Modify Registry

2
T1112

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

7
T1012

System Information Discovery

6
T1082

Software Discovery

1
T1518

Security Software Discovery

1
T1518.001

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

1
T1005

Tasks