Resubmissions

19-07-2023 01:10

230719-bjrrcsff41 10

General

  • Target

    https://linkvertise.download/download/256968/gui-murderers-vs-sheriff/boaCyIL4abH06116lvbf0akMTbYPpq8J

  • Sample

    230719-bjrrcsff41

Malware Config

Targets

    • Target

      https://linkvertise.download/download/256968/gui-murderers-vs-sheriff/boaCyIL4abH06116lvbf0akMTbYPpq8J

    • Cobalt Strike reflective loader

      Detects the reflective loader used by Cobalt Strike.

    • Cobaltstrike

      Detected malicious payload which is part of Cobaltstrike.

    • 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

    • 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

    • 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.

    • 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.

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

MITRE ATT&CK Matrix ATT&CK v6

Persistence

New Service

1
T1050

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

New Service

1
T1050

Defense Evasion

Install Root Certificate

1
T1130

Modify Registry

1
T1112

Credential Access

Credentials in Files

1
T1081

Discovery

Query Registry

4
T1012

System Information Discovery

4
T1082

Security Software Discovery

1
T1063

Collection

Data from Local System

1
T1005

Command and Control

Web Service

1
T1102

Tasks