marsstealer | hxxp://example[.]com

General

Target

http://example.com
Sample

240602-q4wclseg93

Score

10^/10

Malware Config

Extracted

Family

marsstealer

Botnet

Default

C2

www.msk-post.com/server/init.php

Targets

- Target
  
  http://example.com
Score

10^/10

marsstealer umbral default bootkit discovery execution persistence spyware stealer
- Detect Umbral payload
- Mars Stealer
  An infostealer written in C++ based on other infostealers.
  stealer marsstealer
- Umbral
  Umbral stealer is an opensource moduler stealer written in C#.
  stealer umbral
- Command and Scripting Interpreter: PowerShell
  Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
  execution
- Downloads MZ/PE file
- Drops file in Drivers directory
- 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.
  spyware stealer
- Registers COM server for autorun
  persistence
- 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.
  discovery
- 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.
- Writes to the Master Boot Record (MBR)
  Bootkits write to the MBR to gain persistence at a level below the operating system.
  bootkit persistence
- Drops autorun.inf file
  Malware can abuse Windows Autorun to spread further via attached volumes.
- Drops file in System32 directory
- Suspicious use of NtSetInformationThreadHideFromDebugger
behavioral1