Overview

overview

10

Static

static

10

njSilent.exe

windows7-x64

10

njSilent.exe

windows10-2004-x64

8

Analysis

  • max time kernel
    150s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-12-2024 06:19

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General

  • Target

    njSilent.exe

  • Size

    37KB

  • MD5

    e20a459e155e9860e8a00f4d4a6015bf

  • SHA1

    982fe6b24779fa4a64a154947aca4d5615a7af86

  • SHA256

    d6ee68c0057fd95a29a2f112c19cb556837eff859071827bc5d37069742d96cc

  • SHA512

    381a3c27328e30a06125c2fa45334ca84aaff7904afb032e4fd6dec1474179787f0d87e93804b7b79e74987e2977ea19d64de05872c7f4fe1ca818199ed30d02

  • SSDEEP

    384:cmnJMiLrBndznNCyMGmPiePDUcmk3lsrAF+rMRTyN/0L+EcoinblneHQM3epzX0O:Rn9RNRMGmPPg1kVsrM+rMRa8NuS6Jt

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.

  • Drops file in Windows directory 3 IoCs
  • 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\njSilent.exe
    "C:\Users\Admin\AppData\Local\Temp\njSilent.exe"
    1⤵
    • Checks computer location settings
    • Drops file in Windows directory
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1620
    • C:\Windows\svchost.exe
      "C:\Windows\svchost.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • Drops autorun.inf file
      • Drops file in Windows directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4144
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\Windows\svchost.exe" "svchost.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:3380

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:\Windows\svchost.exe
    Filesize

    37KB

    MD5

    e20a459e155e9860e8a00f4d4a6015bf

    SHA1

    982fe6b24779fa4a64a154947aca4d5615a7af86

    SHA256

    d6ee68c0057fd95a29a2f112c19cb556837eff859071827bc5d37069742d96cc

    SHA512

    381a3c27328e30a06125c2fa45334ca84aaff7904afb032e4fd6dec1474179787f0d87e93804b7b79e74987e2977ea19d64de05872c7f4fe1ca818199ed30d02

    Download Submit

  • memory/1620-0-0x0000000075392000-0x0000000075393000-memory.dmp

    Filesize

    4KB

    Download

  • memory/1620-1-0x0000000075390000-0x0000000075941000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1620-2-0x0000000075390000-0x0000000075941000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/1620-13-0x0000000075390000-0x0000000075941000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4144-12-0x0000000075390000-0x0000000075941000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4144-14-0x0000000075390000-0x0000000075941000-memory.dmp

    Filesize

    5.7MB

    Download

  • memory/4144-24-0x0000000075390000-0x0000000075941000-memory.dmp

    Filesize

    5.7MB

    Download