Overview

overview

10

Static

static

10

Bootstrapper.exe

windows7-x64

10

Bootstrapper.exe

windows10-2004-x64

8

Analysis

  • max time kernel
    106s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    09-11-2024 13:59

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General

  • Target

    Bootstrapper.exe

  • Size

    37KB

  • MD5

    e08d7967557238a0ee488e405f7865dd

  • SHA1

    b4428239dff65be117076a6d2169c1f5488e098e

  • SHA256

    3ba9088ef4662608ccdb45a1333d4a5c9970fa90acdfdff4787233b8e4aa23d4

  • SHA512

    f9d197250afbdffb9d7081f87b94687d1cd7d53f7901e0b402444f5e8f9c9df76b8b1ff25d44246231468de3a13bfa5b0d61755bd341bac191bef7ba0d51da81

  • SSDEEP

    384:71/yi00nCVpd3vVmyhKrrvFcCRYc2/efurAF+rMRTyN/0L+EcoinblneHQM3epzR:xHANVdhKr7FcRB/eWrM+rMRa8NuGItN

Score
8/10
discoveryevasionpersistenceprivilege_escalation

Malware Config

Signatures

  • Modifies Windows Firewall 2 TTPs 2 IoCs
    evasion
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • Drops autorun.inf file 1 TTPs 5 IoCs

    Malware can abuse Windows Autorun to spread further via attached volumes.

  • Enumerates physical storage devices 1 TTPs

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

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

    persistenceprivilege_escalation
  • System Location Discovery: System Language Discovery 1 TTPs 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

    discovery
  • Checks SCSI registry key(s) 3 TTPs 3 IoCs

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

  • Modifies registry class 1 IoCs
  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 28 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe
    "C:\Users\Admin\AppData\Local\Temp\Bootstrapper.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:696
    • C:\Users\Admin\RtkAudioService64.exe
      "C:\Users\Admin\RtkAudioService64.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops autorun.inf file
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3604
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Users\Admin\RtkAudioService64.exe" "RtkAudioService64.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:4072
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall delete allowedprogram "C:\Users\Admin\RtkAudioService64.exe"
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:1880
      • C:\Windows\SysWOW64\cmd.exe
        cmd.exe /k ping 0 & del "C:\Users\Admin\RtkAudioService64.exe" & exit
        3⤵
        • System Location Discovery: System Language Discovery
        • System Network Configuration Discovery: Internet Connection Discovery
        • Suspicious use of WriteProcessMemory
        PID:4408
        • C:\Windows\SysWOW64\PING.EXE
          ping 0
          4⤵
          • System Location Discovery: System Language Discovery
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:1744
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /7
    1⤵
    • Checks SCSI registry key(s)
    • Modifies registry class
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1900
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:4144

    Network

    MITRE ATT&CK Enterprise v15

    Reconnaissance

    Resource Development

    Initial Access

    Replication Through Removable Media

    1
    T1091

    Execution

    Persistence

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Create or Modify System Process

    1
    T1543

    Windows Service

    1
    T1543.003

    Event Triggered Execution

    1
    T1546

    Netsh Helper DLL

    1
    T1546.007

    Privilege Escalation

    Boot or Logon Autostart Execution

    1
    T1547

    Registry Run Keys / Startup Folder

    1
    T1547.001

    Create or Modify System Process

    1
    T1543

    Windows Service

    1
    T1543.003

    Event Triggered Execution

    1
    T1546

    Netsh Helper DLL

    1
    T1546.007

    Defense Evasion

    Impair Defenses

    1
    T1562

    Disable or Modify System Firewall

    1
    T1562.004

    Modify Registry

    1
    T1112

    Credential Access

    Discovery

    Peripheral Device Discovery

    1
    T1120

    Query Registry

    2
    T1012

    Remote System Discovery

    1
    T1018

    System Information Discovery

    3
    T1082

    System Location Discovery

    1
    T1614

    System Language Discovery

    1
    T1614.001

    System Network Configuration Discovery

    1
    T1016

    Internet Connection Discovery

    1
    T1016.001

    Lateral Movement

    Replication Through Removable Media

    1
    T1091

    Collection

    Command and Control

    Exfiltration

    Impact

    Replay Monitor

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    Downloads

    • C:\Users\Admin\RtkAudioService64.exe
      Filesize

      37KB

      MD5

      e08d7967557238a0ee488e405f7865dd

      SHA1

      b4428239dff65be117076a6d2169c1f5488e098e

      SHA256

      3ba9088ef4662608ccdb45a1333d4a5c9970fa90acdfdff4787233b8e4aa23d4

      SHA512

      f9d197250afbdffb9d7081f87b94687d1cd7d53f7901e0b402444f5e8f9c9df76b8b1ff25d44246231468de3a13bfa5b0d61755bd341bac191bef7ba0d51da81

      Download Submit

    • memory/696-0-0x0000000074E32000-0x0000000074E33000-memory.dmp

      Filesize

      4KB

      Download

    • memory/696-1-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/696-2-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/696-21-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/1900-45-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-41-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-42-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-43-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-37-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-36-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-35-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-44-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-47-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1900-46-0x000002A587DA0000-0x000002A587DA1000-memory.dmp

      Filesize

      4KB

      Download

    • memory/3604-22-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/3604-23-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/3604-34-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/3604-33-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/3604-48-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/3604-53-0x0000000074E30000-0x00000000753E1000-memory.dmp

      Filesize

      5.7MB

      Download