Overview

overview

10

Static

static

3

Starcat ra...re.exe

windows7-x64

9

Starcat ra...re.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    119s
  • max time network
    120s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    15/12/2024, 07:41

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General

  • Target

    Starcat ransomware.exe

  • Size

    4.2MB

  • MD5

    0df6cb830d2f8f248ebb420e0473e40b

  • SHA1

    4f89623b972450fac3b320779672003b06fa5d9f

  • SHA256

    9cc7fd79b16ed36fe78d8b6bc9ea5e99bb1fb48a39d6051c3961bf503fd16a24

  • SHA512

    765073189498d4889a18dcd959cec54e4d837a3de249607c8dd4288f2204ba48992cf284afa76fcedf1f6a59954305b37fb0ab99639fca96a643526d16d067a7

  • SSDEEP

    49152:DYIU6iwVwASOuGtlqGz2OiG3NWE8Nsz3QEyB+68eBDN4NoIumzqsRrtYpFGY+uby:L+UaOwENQ3mzROac6t

Score
9/10
defense_evasionexecutionimpactpersistenceransomwarespywarestealer

Malware Config

Signatures

  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Renames multiple (1236) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

    spywarestealer
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • Drops file in Program Files directory 64 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

    persistenceexecution
  • Suspicious behavior: EnumeratesProcesses 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\Starcat ransomware.exe
    "C:\Users\Admin\AppData\Local\Temp\Starcat ransomware.exe"
    1⤵
    • Adds Run key to start application
    • Sets desktop wallpaper using registry
    • Drops file in Program Files directory
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2420
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c vssadmin.exe delete shadows /all /quiet
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2064
      • C:\Windows\system32\vssadmin.exe
        vssadmin.exe delete shadows /all /quiet
        3⤵
        • Interacts with shadow copies
        PID:3608
    • C:\Windows\system32\cmd.exe
      cmd /c schtasks /create /tn "CopyFileTask" /tr "cmd.exe / c copy "C:\star_cat.txt" "C:\Users\Admin\Desktop\recover files,view here.txt"" / sc minute / mo 10 / f
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1320
      • C:\Windows\system32\schtasks.exe
        schtasks /create /tn "CopyFileTask" /tr "cmd.exe / c copy "C:\star_cat.txt" "C:\Users\Admin\Desktop\recover files,view here.txt"" / sc minute / mo 10 / f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:596
    • C:\Windows\system32\WerFault.exe
      C:\Windows\system32\WerFault.exe -u -p 2420 -s 4804
      2⤵
        PID:696
    • C:\Windows\system32\vssvc.exe
      C:\Windows\system32\vssvc.exe
      1⤵
      • Suspicious use of AdjustPrivilegeToken
      PID:3640

    Network

    MITRE ATT&CK Enterprise v15

    Reconnaissance

    Resource Development

    Initial Access

    Execution

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Windows Management Instrumentation

    1
    T1047

    Persistence

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Privilege Escalation

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Scheduled Task/Job

    1
    T1053

    Scheduled Task

    1
    T1053.005

    Defense Evasion

    Direct Volume Access

    1
    T1006

    Indicator Removal

    2
    T1070

    File Deletion

    2
    T1070.004

    Modify Registry

    2
    T1112

    Credential Access

    Credentials from Password Stores

    1
    T1555

    Credentials from Web Browsers

    1
    T1555.003

    Unsecured Credentials

    1
    T1552

    Credentials In Files

    1
    T1552.001

    Discovery

    System Information Discovery

    1
    T1082

    Lateral Movement

    Collection

    Data from Local System

    1
    T1005

    Command and Control

    Exfiltration

    Impact

    Defacement

    1
    T1491

    Inhibit System Recovery

    2
    T1490

    Replay Monitor

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    Downloads