Overview

overview

10

Static

static

10

Bootstrapper.exe

windows7-x64

10

Bootstrapper.exe

windows10-2004-x64

8

Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-11-2024 14:26

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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 1 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 3 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 3 IoCs

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

    discovery
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 35 IoCs
  • Suspicious use of WriteProcessMemory 6 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:4040
    • 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:1148
      • 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:4868

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

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

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/1148-22-0x00000000754F0000-0x0000000075AA1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1148-23-0x00000000754F0000-0x0000000075AA1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1148-33-0x00000000754F0000-0x0000000075AA1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1148-34-0x00000000754F0000-0x0000000075AA1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1148-35-0x00000000754F0000-0x0000000075AA1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4040-0-0x00000000754F2000-0x00000000754F3000-memory.dmp

    Filesize

    4KB

    Download

  • memory/4040-1-0x00000000754F0000-0x0000000075AA1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4040-2-0x00000000754F0000-0x0000000075AA1000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4040-21-0x00000000754F0000-0x0000000075AA1000-memory.dmp

    Filesize

    5.7MB

    Download