Overview

overview

8

Static

static

3

letsvpn-latest.exe

windows10-2004-x64

8

letsvpn-latest.exe

windows11-ltsc_2024-x64

8

$PLUGINSDI...em.dll

windows10-2004-x64

3

$PLUGINSDI...em.dll

windows11-ltsc_2024-x64

3

$PLUGINSDI...gs.dll

windows10-2004-x64

3

$PLUGINSDI...gs.dll

windows11-ltsc_2024-x64

3

driver/tapinstall.exe

windows10-2004-x64

driver/tapinstall.exe

windows11-ltsc_2024-x64

Sharing

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General

  • Target
    letsvpn-latest.exe
  • Size 16.7MB
  • Sample260815-15fcwsvapf
  • SHA256 796640f54bdad0f8a77fdde41ef8d15bde06cc5e1d6920159ebd8ab06a0e4bc9
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
defense_evasiondiscoveryexecutionpersistenceprivilege_escalationspywaretrojan

Malware Config

Targets

    • Target
      letsvpn-latest.exe
    • Size 16.7MB
    • SHA256 796640f54bdad0f8a77fdde41ef8d15bde06cc5e1d6920159ebd8ab06a0e4bc9
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    8/10
    defense_evasiondiscoveryexecutionpersistenceprivilege_escalationspywaretrojan

    • Drops file in Drivers directory

    • Unexpected DNS network traffic destination

      Network traffic to other servers than the configured DNS servers was detected on the DNS port.

    • Adds Run key to start application

      persistence

    • Modifies Windows Firewall

      defense_evasion

    • Network Service Discovery

      Attempt to gather information on host's network.

      discovery

    • Drops file in System32 directory

    behavioral1behavioral2
    • Target
      $PLUGINSDIR/System.dll
    • Size 12KB
    • SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    3/10
    discovery
    behavioral3behavioral4
    • Target
      $PLUGINSDIR/nsDialogs.dll
    • Size 9KB
    • SHA256 89a82c4849c21dfe765052681e1fad02d2d7b13c8b5075880c52423dca72a912
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    3/10
    discovery
    behavioral5behavioral6
    • Target
      driver/tapinstall.exe
    • Size 117KB
    • SHA256 319b295a173eeeea48dfde5ec6c6f0b96c38f3857d9f38217a00ad314d9056f3
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    1/10
    behavioral7behavioral8

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

3
T1059

PowerShell

1
T1059.001

Windows Command Shell

1
T1059.003

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

2
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

Discovery

Network Service Discovery

1
T1046

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

Tasks