Overview

overview

10

Static

static

10

Lammer.exe

windows10-ltsc 2021-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-ltsc 2021_x64
  • resource
    win10ltsc2021-20250113-en
  • resource tags

    arch:x64arch:x86image:win10ltsc2021-20250113-enlocale:en-usos:windows10-ltsc 2021-x64system
  • submitted
    22/01/2025, 15:29

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General

  • Target

    Lammer.exe

  • Size

    23KB

  • MD5

    cb0624ab1305a34c535bf15fd4406bd3

  • SHA1

    8f54f9ffa00236c6e5ae0fb78c6a2176b9bd0e9d

  • SHA256

    4797fdc9fb7220c98d14a2b5f6e96482dced4ab87626b167548a5e299e902b23

  • SHA512

    8abd776e50c0be4e8375e3c4d78ebece3aedc93c74d895d2dc829dd3dfddb0388bd2a64185066654d094250c3245ddbebe36082c5d698f01893579e690e43e69

  • SSDEEP

    384:nYmdk8XvCJrQLdRGSiEYF7Y65gPyx6BDXNRmRvR6JZlbw8hqIusZzZsS:wwWkti/aeRpcnuE

Score
10/10
njratdefense_evasiondiscoverypersistenceprivilege_escalationtrojan

Malware Config

Signatures

  • Njrat family
    njrat
  • njRAT/Bladabindi

    Widely used RAT written in .NET.

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

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

  • Drops startup file 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
    persistence
  • 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
  • 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
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 38 IoCs
  • Suspicious use of FindShellTrayWindow 64 IoCs
  • Suspicious use of SendNotifyMessage 64 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Lammer.exe
    "C:\Users\Admin\AppData\Local\Temp\Lammer.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3192
    • C:\ProgramData\Trojan.exe
      "C:\ProgramData\Trojan.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4216
      • C:\Windows\SysWOW64\netsh.exe
        netsh firewall add allowedprogram "C:\ProgramData\Trojan.exe" "Trojan.exe" ENABLE
        3⤵
        • Modifies Windows Firewall
        • Event Triggered Execution: Netsh Helper DLL
        • System Location Discovery: System Language Discovery
        PID:2840
  • C:\Windows\system32\taskmgr.exe
    "C:\Windows\system32\taskmgr.exe" /4
    1⤵
    • Drops startup file
    • Checks SCSI registry key(s)
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    PID:1224
  • C:\Windows\System32\rundll32.exe
    C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
    1⤵
      PID:636

    Network

    MITRE ATT&CK Enterprise v15

    Reconnaissance

    Resource Development

    Initial Access

    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

    System Information Discovery

    3
    T1082

    System Location Discovery

    1
    T1614

    System Language Discovery

    1
    T1614.001

    Lateral Movement

    Collection

    Command and Control

    Exfiltration

    Impact

    Replay Monitor

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    Downloads

    • C:\ProgramData\Trojan.exe
      Filesize

      23KB

      MD5

      cb0624ab1305a34c535bf15fd4406bd3

      SHA1

      8f54f9ffa00236c6e5ae0fb78c6a2176b9bd0e9d

      SHA256

      4797fdc9fb7220c98d14a2b5f6e96482dced4ab87626b167548a5e299e902b23

      SHA512

      8abd776e50c0be4e8375e3c4d78ebece3aedc93c74d895d2dc829dd3dfddb0388bd2a64185066654d094250c3245ddbebe36082c5d698f01893579e690e43e69

      Download Submit

    • memory/1224-31-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-32-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-27-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-21-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-28-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-29-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-30-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-33-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-23-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/1224-22-0x0000019AB9C90000-0x0000019AB9C91000-memory.dmp

      Filesize

      4KB

      Download

    • memory/3192-2-0x0000000074F40000-0x00000000754F1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/3192-0-0x0000000074F42000-0x0000000074F43000-memory.dmp

      Filesize

      4KB

      Download

    • memory/3192-15-0x0000000074F40000-0x00000000754F1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/3192-1-0x0000000074F40000-0x00000000754F1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/4216-16-0x0000000074F40000-0x00000000754F1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/4216-19-0x0000000074F40000-0x00000000754F1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/4216-20-0x0000000074F40000-0x00000000754F1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/4216-18-0x0000000074F40000-0x00000000754F1000-memory.dmp

      Filesize

      5.7MB

      Download

    • memory/4216-17-0x0000000074F40000-0x00000000754F1000-memory.dmp

      Filesize

      5.7MB

      Download